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Kubeadm Generated

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1 -

kubeadm: easily bootstrap a secure Kubernetes cluster

Synopsis

┌──────────────────────────────────────────────────────────┐
│ KUBEADM                                                  │
│ Easily bootstrap a secure Kubernetes cluster             │
│                                                          │
│ Please give us feedback at:                              │
│ https://github.com/kubernetes/kubeadm/issues             │
└──────────────────────────────────────────────────────────┘

Example usage:

Create a two-machine cluster with one control-plane node
(which controls the cluster), and one worker node
(where your workloads, like Pods and Deployments run).

┌──────────────────────────────────────────────────────────┐
│ On the first machine:                                    │
├──────────────────────────────────────────────────────────┤
│ control-plane# kubeadm init                              │
└──────────────────────────────────────────────────────────┘

┌──────────────────────────────────────────────────────────┐
│ On the second machine:                                   │
├──────────────────────────────────────────────────────────┤
│ worker# kubeadm join &lt;arguments-returned-from-init&gt;      │
└──────────────────────────────────────────────────────────┘

You can then repeat the second step on as many other machines as you like.

Options

-h, --help
	help for kubeadm
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

2 -

Commands related to handling kubernetes certificates

Synopsis

Commands related to handling kubernetes certificates

kubeadm certs [flags]

Options

-h, --help
	help for certs

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

3 -

Generate certificate keys

Synopsis

This command will print out a secure randomly-generated certificate key that can be used with the "init" command.

You can also use "kubeadm init --upload-certs" without specifying a certificate key and it will generate and print one for you.

kubeadm certs certificate-key [flags]

Options

-h, --help
	help for certificate-key

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

4 -

Check certificates expiration for a Kubernetes cluster

Synopsis

Checks expiration for the certificates in the local PKI managed by kubeadm.

kubeadm certs check-expiration [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for check-expiration
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

5 -

Generate keys and certificate signing requests

Synopsis

Generates keys and certificate signing requests (CSRs) for all the certificates required to run the control plane. This command also generates partial kubeconfig files with private key data in the "users > user > client-key-data" field, and for each kubeconfig file an accompanying ".csr" file is created.

This command is designed for use in Kubeadm External CA Mode. It generates CSRs which you can then submit to your external certificate authority for signing.

The PEM encoded signed certificates should then be saved alongside the key files, using ".crt" as the file extension, or in the case of kubeconfig files, the PEM encoded signed certificate should be base64 encoded and added to the kubeconfig file in the "users > user > client-certificate-data" field.

kubeadm certs generate-csr [flags]

Examples

  # The following command will generate keys and CSRs for all control-plane certificates and kubeconfig files:
  kubeadm certs generate-csr --kubeconfig-dir /tmp/etc-k8s --cert-dir /tmp/etc-k8s/pki

Options

--cert-dir string
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for generate-csr
--kubeconfig-dir string Default: "/etc/kubernetes"
	The path where to save the kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

6 -

Renew certificates for a Kubernetes cluster

Synopsis

This command is not meant to be run on its own. See list of available subcommands.

kubeadm certs renew [flags]

Options

-h, --help
	help for renew

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

7 -

Renew the certificate embedded in the kubeconfig file for the admin to use and for kubeadm itself

Synopsis

Renew the certificate embedded in the kubeconfig file for the admin to use and for kubeadm itself.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew admin.conf [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for admin.conf
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

8 -

Renew all available certificates

Synopsis

Renew all known certificates necessary to run the control plane. Renewals are run unconditionally, regardless of expiration date. Renewals can also be run individually for more control.

kubeadm certs renew all [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for all
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

9 -

Renew the certificate the apiserver uses to access etcd

Synopsis

Renew the certificate the apiserver uses to access etcd.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew apiserver-etcd-client [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for apiserver-etcd-client
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

10 -

Renew the certificate for the API server to connect to kubelet

Synopsis

Renew the certificate for the API server to connect to kubelet.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew apiserver-kubelet-client [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for apiserver-kubelet-client
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

11 -

Renew the certificate for serving the Kubernetes API

Synopsis

Renew the certificate for serving the Kubernetes API.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew apiserver [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for apiserver
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

12 -

Renew the certificate embedded in the kubeconfig file for the controller manager to use

Synopsis

Renew the certificate embedded in the kubeconfig file for the controller manager to use.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew controller-manager.conf [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for controller-manager.conf
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

13 -

Renew the certificate for liveness probes to healthcheck etcd

Synopsis

Renew the certificate for liveness probes to healthcheck etcd.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew etcd-healthcheck-client [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for etcd-healthcheck-client
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

14 -

Renew the certificate for etcd nodes to communicate with each other

Synopsis

Renew the certificate for etcd nodes to communicate with each other.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew etcd-peer [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for etcd-peer
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

15 -

Renew the certificate for serving etcd

Synopsis

Renew the certificate for serving etcd.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew etcd-server [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for etcd-server
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

16 -

Renew the certificate for the front proxy client

Synopsis

Renew the certificate for the front proxy client.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew front-proxy-client [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for front-proxy-client
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

17 -

Renew the certificate embedded in the kubeconfig file for the scheduler manager to use

Synopsis

Renew the certificate embedded in the kubeconfig file for the scheduler manager to use.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew scheduler.conf [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for scheduler.conf
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

18 -

Renew the certificate embedded in the kubeconfig file for the super-admin

Synopsis

Renew the certificate embedded in the kubeconfig file for the super-admin.

Renewals run unconditionally, regardless of certificate expiration date; extra attributes such as SANs will be based on the existing file/certificates, there is no need to resupply them.

Renewal by default tries to use the certificate authority in the local PKI managed by kubeadm; as alternative it is possible to use K8s certificate API for certificate renewal, or as a last option, to generate a CSR request.

After renewal, in order to make changes effective, is required to restart control-plane components and eventually re-distribute the renewed certificate in case the file is used elsewhere.

kubeadm certs renew super-admin.conf [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save the certificates
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for super-admin.conf
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

19 -

Output shell completion code for the specified shell (bash or zsh)

Synopsis

Output shell completion code for the specified shell (bash or zsh). The shell code must be evaluated to provide interactive completion of kubeadm commands. This can be done by sourcing it from the .bash_profile.

Note: this requires the bash-completion framework.

To install it on Mac use homebrew: $ brew install bash-completion Once installed, bash_completion must be evaluated. This can be done by adding the following line to the .bash_profile $ source $(brew --prefix)/etc/bash_completion

If bash-completion is not installed on Linux, please install the 'bash-completion' package via your distribution's package manager.

Note for zsh users: [1] zsh completions are only supported in versions of zsh >= 5.2

kubeadm completion SHELL [flags]

Examples


# Install bash completion on a Mac using homebrew
brew install bash-completion
printf "\n# Bash completion support\nsource $(brew --prefix)/etc/bash_completion\n" >> $HOME/.bash_profile
source $HOME/.bash_profile

# Load the kubeadm completion code for bash into the current shell
source <(kubeadm completion bash)

# Write bash completion code to a file and source it from .bash_profile
kubeadm completion bash > ~/.kube/kubeadm_completion.bash.inc
printf "\n# Kubeadm shell completion\nsource '$HOME/.kube/kubeadm_completion.bash.inc'\n" >> $HOME/.bash_profile
source $HOME/.bash_profile

# Load the kubeadm completion code for zsh[1] into the current shell
source <(kubeadm completion zsh)

Options

-h, --help
	help for completion

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

20 -

Manage configuration for a kubeadm cluster persisted in a ConfigMap in the cluster

Synopsis

There is a ConfigMap in the kube-system namespace called "kubeadm-config" that kubeadm uses to store internal configuration about the cluster. kubeadm CLI v1.8.0+ automatically creates this ConfigMap with the config used with 'kubeadm init', but if you initialized your cluster using kubeadm v1.7.x or lower, you must use the 'config upload' command to create this ConfigMap. This is required so that 'kubeadm upgrade' can configure your upgraded cluster correctly.

kubeadm config [flags]

Options

-h, --help
	help for config
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

21 -

Interact with container images used by kubeadm

Synopsis

Interact with container images used by kubeadm

kubeadm config images [flags]

Options

-h, --help
	help for images

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

22 -

Print a list of images kubeadm will use. The configuration file is used in case any images or image repositories are customized

Synopsis

Print a list of images kubeadm will use. The configuration file is used in case any images or image repositories are customized

kubeadm config images list [flags]

Options

--allow-missing-template-keys Default: true
	If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats.
--config string
	Path to a kubeadm configuration file.
-o, --experimental-output string Default: "text"
	Output format. One of: text\|json\|yaml\|go-template\|go-template-file\|template\|templatefile\|jsonpath\|jsonpath-as-json\|jsonpath-file.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-h, --help
	help for list
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--show-managed-fields
	If true, keep the managedFields when printing objects in JSON or YAML format.

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

23 -

Pull images used by kubeadm

Synopsis

Pull images used by kubeadm

kubeadm config images pull [flags]

Options

--config string
	Path to a kubeadm configuration file.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-h, --help
	help for pull
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

24 -

Read an older version of the kubeadm configuration API types from a file, and output the similar config object for the newer version

Synopsis

This command lets you convert configuration objects of older versions to the latest supported version, locally in the CLI tool without ever touching anything in the cluster. In this version of kubeadm, the following API versions are supported:

kubeadm.k8s.io/v1beta3

Further, kubeadm can only write out config of version "kubeadm.k8s.io/v1beta3", but read both types. So regardless of what version you pass to the --old-config parameter here, the API object will be read, deserialized, defaulted, converted, validated, and re-serialized when written to stdout or --new-config if specified.

In other words, the output of this command is what kubeadm actually would read internally if you submitted this file to "kubeadm init"

kubeadm config migrate [flags]

Options

--allow-experimental-api
	Allow migration to experimental, unreleased APIs.
-h, --help
	help for migrate
--new-config string
	Path to the resulting equivalent kubeadm config file using the new API version. Optional, if not specified output will be sent to STDOUT.
--old-config string
	Path to the kubeadm config file that is using an old API version and should be converted. This flag is mandatory.

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

25 -

Print configuration

Synopsis

This command prints configurations for subcommands provided. For details, see: https://pkg.go.dev/k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm#section-directories

kubeadm config print [flags]

Options

-h, --help
	help for print

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

26 -

Print default init configuration, that can be used for 'kubeadm init'

Synopsis

This command prints objects such as the default init configuration that is used for 'kubeadm init'.

Note that sensitive values like the Bootstrap Token fields are replaced with placeholder values like "abcdef.0123456789abcdef" in order to pass validation but not perform the real computation for creating a token.

kubeadm config print init-defaults [flags]

Options

--component-configs strings
	A comma-separated list for component config API objects to print the default values for. Available values: [KubeProxyConfiguration KubeletConfiguration]. If this flag is not set, no component configs will be printed.
-h, --help
	help for init-defaults

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

27 -

Print default join configuration, that can be used for 'kubeadm join'

Synopsis

This command prints objects such as the default join configuration that is used for 'kubeadm join'.

Note that sensitive values like the Bootstrap Token fields are replaced with placeholder values like "abcdef.0123456789abcdef" in order to pass validation but not perform the real computation for creating a token.

kubeadm config print join-defaults [flags]

Options

-h, --help
	help for join-defaults

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

28 -

Print default reset configuration, that can be used for 'kubeadm reset'

Synopsis

This command prints objects such as the default reset configuration that is used for 'kubeadm reset'.

Note that sensitive values like the Bootstrap Token fields are replaced with placeholder values like "abcdef.0123456789abcdef" in order to pass validation but not perform the real computation for creating a token.

kubeadm config print reset-defaults [flags]

Options

-h, --help
	help for reset-defaults

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

29 -

Read a file containing the kubeadm configuration API and report any validation problems

Synopsis

This command lets you validate a kubeadm configuration API file and report any warnings and errors. If there are no errors the exit status will be zero, otherwise it will be non-zero. Any unmarshaling problems such as unknown API fields will trigger errors. Unknown API versions and fields with invalid values will also trigger errors. Any other errors or warnings may be reported depending on contents of the input file.

In this version of kubeadm, the following API versions are supported:

kubeadm.k8s.io/v1beta3

kubeadm config validate [flags]

Options

--allow-experimental-api
	Allow validation of experimental, unreleased APIs.
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for validate

Options inherited from parent commands

--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

30 -

Run this command in order to set up the Kubernetes control plane

Synopsis

Run this command in order to set up the Kubernetes control plane

The "init" command executes the following phases:

preflight                    Run pre-flight checks
certs                        Certificate generation
  /ca                          Generate the self-signed Kubernetes CA to provision identities for other Kubernetes components
  /apiserver                   Generate the certificate for serving the Kubernetes API
  /apiserver-kubelet-client    Generate the certificate for the API server to connect to kubelet
  /front-proxy-ca              Generate the self-signed CA to provision identities for front proxy
  /front-proxy-client          Generate the certificate for the front proxy client
  /etcd-ca                     Generate the self-signed CA to provision identities for etcd
  /etcd-server                 Generate the certificate for serving etcd
  /etcd-peer                   Generate the certificate for etcd nodes to communicate with each other
  /etcd-healthcheck-client     Generate the certificate for liveness probes to healthcheck etcd
  /apiserver-etcd-client       Generate the certificate the apiserver uses to access etcd
  /sa                          Generate a private key for signing service account tokens along with its public key
kubeconfig                   Generate all kubeconfig files necessary to establish the control plane and the admin kubeconfig file
  /admin                       Generate a kubeconfig file for the admin to use and for kubeadm itself
  /super-admin                 Generate a kubeconfig file for the super-admin
  /kubelet                     Generate a kubeconfig file for the kubelet to use *only* for cluster bootstrapping purposes
  /controller-manager          Generate a kubeconfig file for the controller manager to use
  /scheduler                   Generate a kubeconfig file for the scheduler to use
etcd                         Generate static Pod manifest file for local etcd
  /local                       Generate the static Pod manifest file for a local, single-node local etcd instance
control-plane                Generate all static Pod manifest files necessary to establish the control plane
  /apiserver                   Generates the kube-apiserver static Pod manifest
  /controller-manager          Generates the kube-controller-manager static Pod manifest
  /scheduler                   Generates the kube-scheduler static Pod manifest
kubelet-start                Write kubelet settings and (re)start the kubelet
upload-config                Upload the kubeadm and kubelet configuration to a ConfigMap
  /kubeadm                     Upload the kubeadm ClusterConfiguration to a ConfigMap
  /kubelet                     Upload the kubelet component config to a ConfigMap
upload-certs                 Upload certificates to kubeadm-certs
mark-control-plane           Mark a node as a control-plane
bootstrap-token              Generates bootstrap tokens used to join a node to a cluster
kubelet-finalize             Updates settings relevant to the kubelet after TLS bootstrap
  /experimental-cert-rotation  Enable kubelet client certificate rotation
addon                        Install required addons for passing conformance tests
  /coredns                     Install the CoreDNS addon to a Kubernetes cluster
  /kube-proxy                  Install the kube-proxy addon to a Kubernetes cluster
show-join-command            Show the join command for control-plane and worker node

kubeadm init [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--apiserver-cert-extra-sans strings
	Optional extra Subject Alternative Names (SANs) to use for the API Server serving certificate. Can be both IP addresses and DNS names.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--certificate-key string
	Key used to encrypt the control-plane certificates in the kubeadm-certs Secret. The certificate key is a hex encoded string that is an AES key of size 32 bytes.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--dry-run
	Don't apply any changes; just output what would be done.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-h, --help
	help for init
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--node-name string
	Specify the node name.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--pod-network-cidr string
	Specify range of IP addresses for the pod network. If set, the control plane will automatically allocate CIDRs for every node.
--service-cidr string Default: "10.96.0.0/12"
	Use alternative range of IP address for service VIPs.
--service-dns-domain string Default: "cluster.local"
	Use alternative domain for services, e.g. "myorg.internal".
--skip-certificate-key-print
	Don't print the key used to encrypt the control-plane certificates.
--skip-phases strings
	List of phases to be skipped
--skip-token-print
	Skip printing of the default bootstrap token generated by 'kubeadm init'.
--token string
	The token to use for establishing bidirectional trust between nodes and control-plane nodes. The format is [a-z0-9]{6}.[a-z0-9]{16} - e.g. abcdef.0123456789abcdef
--token-ttl duration Default: 24h0m0s
	The duration before the token is automatically deleted (e.g. 1s, 2m, 3h). If set to '0', the token will never expire
--upload-certs
	Upload control-plane certificates to the kubeadm-certs Secret.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

31 -

Use this command to invoke single phase of the init workflow

Synopsis

Use this command to invoke single phase of the init workflow

Options

-h, --help
	help for phase

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

32 -

Install required addons for passing conformance tests

Synopsis

This command is not meant to be run on its own. See list of available subcommands.

kubeadm init phase addon [flags]

Options

-h, --help
	help for addon

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

33 -

Install all the addons

Synopsis

Install all the addons

kubeadm init phase addon all [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-h, --help
	help for all
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--pod-network-cidr string
	Specify range of IP addresses for the pod network. If set, the control plane will automatically allocate CIDRs for every node.
--service-cidr string Default: "10.96.0.0/12"
	Use alternative range of IP address for service VIPs.
--service-dns-domain string Default: "cluster.local"
	Use alternative domain for services, e.g. "myorg.internal".

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

34 -

Install the CoreDNS addon to a Kubernetes cluster

Synopsis

Install the CoreDNS addon components via the API server. Please note that although the DNS server is deployed, it will not be scheduled until CNI is installed.

kubeadm init phase addon coredns [flags]

Options

--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-h, --help
	help for coredns
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--print-manifest
	Print the addon manifests to STDOUT instead of installing them
--service-cidr string Default: "10.96.0.0/12"
	Use alternative range of IP address for service VIPs.
--service-dns-domain string Default: "cluster.local"
	Use alternative domain for services, e.g. "myorg.internal".

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

35 -

Install the kube-proxy addon to a Kubernetes cluster

Synopsis

Install the kube-proxy addon components via the API server.

kubeadm init phase addon kube-proxy [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for kube-proxy
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--pod-network-cidr string
	Specify range of IP addresses for the pod network. If set, the control plane will automatically allocate CIDRs for every node.
--print-manifest
	Print the addon manifests to STDOUT instead of installing them

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

36 -

Generates bootstrap tokens used to join a node to a cluster

Synopsis

Bootstrap tokens are used for establishing bidirectional trust between a node joining the cluster and a control-plane node.

This command makes all the configurations required to make bootstrap tokens works and then creates an initial token.

kubeadm init phase bootstrap-token [flags]

Examples

  # Make all the bootstrap token configurations and create an initial token, functionally
  # equivalent to what generated by kubeadm init.
  kubeadm init phase bootstrap-token

Options

--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for bootstrap-token
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--skip-token-print
	Skip printing of the default bootstrap token generated by 'kubeadm init'.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

37 -

Certificate generation

Synopsis

This command is not meant to be run on its own. See list of available subcommands.

kubeadm init phase certs [flags]

Options

-h, --help
	help for certs

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

38 -

Generate all certificates

Synopsis

Generate all certificates

kubeadm init phase certs all [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-cert-extra-sans strings
	Optional extra Subject Alternative Names (SANs) to use for the API Server serving certificate. Can be both IP addresses and DNS names.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for all
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--service-cidr string Default: "10.96.0.0/12"
	Use alternative range of IP address for service VIPs.
--service-dns-domain string Default: "cluster.local"
	Use alternative domain for services, e.g. "myorg.internal".

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

39 -

Generate the certificate the apiserver uses to access etcd

Synopsis

Generate the certificate the apiserver uses to access etcd, and save them into apiserver-etcd-client.crt and apiserver-etcd-client.key files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs apiserver-etcd-client [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for apiserver-etcd-client
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

40 -

Generate the certificate for the API server to connect to kubelet

Synopsis

Generate the certificate for the API server to connect to kubelet, and save them into apiserver-kubelet-client.crt and apiserver-kubelet-client.key files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs apiserver-kubelet-client [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for apiserver-kubelet-client
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

41 -

Generate the certificate for serving the Kubernetes API

Synopsis

Generate the certificate for serving the Kubernetes API, and save them into apiserver.crt and apiserver.key files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs apiserver [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-cert-extra-sans strings
	Optional extra Subject Alternative Names (SANs) to use for the API Server serving certificate. Can be both IP addresses and DNS names.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for apiserver
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--service-cidr string Default: "10.96.0.0/12"
	Use alternative range of IP address for service VIPs.
--service-dns-domain string Default: "cluster.local"
	Use alternative domain for services, e.g. "myorg.internal".

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

42 -

Generate the self-signed Kubernetes CA to provision identities for other Kubernetes components

Synopsis

Generate the self-signed Kubernetes CA to provision identities for other Kubernetes components, and save them into ca.crt and ca.key files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs ca [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for ca
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

43 -

Generate the self-signed CA to provision identities for etcd

Synopsis

Generate the self-signed CA to provision identities for etcd, and save them into etcd/ca.crt and etcd/ca.key files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs etcd-ca [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for etcd-ca
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

44 -

Generate the certificate for liveness probes to healthcheck etcd

Synopsis

Generate the certificate for liveness probes to healthcheck etcd, and save them into etcd/healthcheck-client.crt and etcd/healthcheck-client.key files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs etcd-healthcheck-client [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for etcd-healthcheck-client
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

45 -

Generate the certificate for etcd nodes to communicate with each other

Synopsis

Generate the certificate for etcd nodes to communicate with each other, and save them into etcd/peer.crt and etcd/peer.key files.

Default SANs are localhost, 127.0.0.1, 127.0.0.1, ::1

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs etcd-peer [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for etcd-peer
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

46 -

Generate the certificate for serving etcd

Synopsis

Generate the certificate for serving etcd, and save them into etcd/server.crt and etcd/server.key files.

Default SANs are localhost, 127.0.0.1, 127.0.0.1, ::1

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs etcd-server [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for etcd-server
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

47 -

Generate the self-signed CA to provision identities for front proxy

Synopsis

Generate the self-signed CA to provision identities for front proxy, and save them into front-proxy-ca.crt and front-proxy-ca.key files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs front-proxy-ca [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for front-proxy-ca
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

48 -

Generate the certificate for the front proxy client

Synopsis

Generate the certificate for the front proxy client, and save them into front-proxy-client.crt and front-proxy-client.key files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs front-proxy-client [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for front-proxy-client
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

49 -

Generate a private key for signing service account tokens along with its public key

Synopsis

Generate the private key for signing service account tokens along with its public key, and save them into sa.key and sa.pub files.

If both files already exist, kubeadm skips the generation step and existing files will be used.

kubeadm init phase certs sa [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
-h, --help
	help for sa

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

50 -

Generate all static Pod manifest files necessary to establish the control plane

Synopsis

This command is not meant to be run on its own. See list of available subcommands.

kubeadm init phase control-plane [flags]

Options

-h, --help
	help for control-plane

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

51 -

Generate all static Pod manifest files

Synopsis

Generate all static Pod manifest files

kubeadm init phase control-plane all [flags]

Examples

  # Generates all static Pod manifest files for control plane components,
  # functionally equivalent to what is generated by kubeadm init.
  kubeadm init phase control-plane all
  
  # Generates all static Pod manifest files using options read from a configuration file.
  kubeadm init phase control-plane all --config config.yaml

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--apiserver-extra-args <comma-separated 'key=value' pairs>
	A set of extra flags to pass to the API Server or override default ones in form of <flagname>=<value>
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--controller-manager-extra-args <comma-separated 'key=value' pairs>
	A set of extra flags to pass to the Controller Manager or override default ones in form of <flagname>=<value>
--dry-run
	Don't apply any changes; just output what would be done.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-h, --help
	help for all
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--pod-network-cidr string
	Specify range of IP addresses for the pod network. If set, the control plane will automatically allocate CIDRs for every node.
--scheduler-extra-args <comma-separated 'key=value' pairs>
	A set of extra flags to pass to the Scheduler or override default ones in form of <flagname>=<value>
--service-cidr string Default: "10.96.0.0/12"
	Use alternative range of IP address for service VIPs.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

52 -

Generates the kube-apiserver static Pod manifest

Synopsis

Generates the kube-apiserver static Pod manifest

kubeadm init phase control-plane apiserver [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--apiserver-extra-args <comma-separated 'key=value' pairs>
	A set of extra flags to pass to the API Server or override default ones in form of <flagname>=<value>
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-h, --help
	help for apiserver
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--service-cidr string Default: "10.96.0.0/12"
	Use alternative range of IP address for service VIPs.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

53 -

Generates the kube-controller-manager static Pod manifest

Synopsis

Generates the kube-controller-manager static Pod manifest

kubeadm init phase control-plane controller-manager [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--controller-manager-extra-args <comma-separated 'key=value' pairs>
	A set of extra flags to pass to the Controller Manager or override default ones in form of <flagname>=<value>
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for controller-manager
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--pod-network-cidr string
	Specify range of IP addresses for the pod network. If set, the control plane will automatically allocate CIDRs for every node.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

54 -

Generates the kube-scheduler static Pod manifest

Synopsis

Generates the kube-scheduler static Pod manifest

kubeadm init phase control-plane scheduler [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for scheduler
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--scheduler-extra-args <comma-separated 'key=value' pairs>
	A set of extra flags to pass to the Scheduler or override default ones in form of <flagname>=<value>

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

55 -

Generate static Pod manifest file for local etcd

Synopsis

This command is not meant to be run on its own. See list of available subcommands.

kubeadm init phase etcd [flags]

Options

-h, --help
	help for etcd

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

56 -

Generate the static Pod manifest file for a local, single-node local etcd instance

Synopsis

Generate the static Pod manifest file for a local, single-node local etcd instance

kubeadm init phase etcd local [flags]

Examples

  # Generates the static Pod manifest file for etcd, functionally
  # equivalent to what is generated by kubeadm init.
  kubeadm init phase etcd local
  
  # Generates the static Pod manifest file for etcd using options
  # read from a configuration file.
  kubeadm init phase etcd local --config config.yaml

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for local
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

57 -

Generate all kubeconfig files necessary to establish the control plane and the admin kubeconfig file

Synopsis

This command is not meant to be run on its own. See list of available subcommands.

kubeadm init phase kubeconfig [flags]

Options

-h, --help
	help for kubeconfig

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

58 -

Generate a kubeconfig file for the admin to use and for kubeadm itself

Synopsis

Generate the kubeconfig file for the admin and for kubeadm itself, and save it to admin.conf file.

kubeadm init phase kubeconfig admin [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for admin
--kubeconfig-dir string Default: "/etc/kubernetes"
	The path where to save the kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

59 -

Generate all kubeconfig files

Synopsis

Generate all kubeconfig files

kubeadm init phase kubeconfig all [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for all
--kubeconfig-dir string Default: "/etc/kubernetes"
	The path where to save the kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--node-name string
	Specify the node name.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

60 -

Generate a kubeconfig file for the controller manager to use

Synopsis

Generate the kubeconfig file for the controller manager to use and save it to controller-manager.conf file

kubeadm init phase kubeconfig controller-manager [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for controller-manager
--kubeconfig-dir string Default: "/etc/kubernetes"
	The path where to save the kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

61 -

Generate a kubeconfig file for the kubelet to use only for cluster bootstrapping purposes

Synopsis

Generate the kubeconfig file for the kubelet to use and save it to kubelet.conf file.

Please note that this should only be used for cluster bootstrapping purposes. After your control plane is up, you should request all kubelet credentials from the CSR API.

kubeadm init phase kubeconfig kubelet [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for kubelet
--kubeconfig-dir string Default: "/etc/kubernetes"
	The path where to save the kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.
--node-name string
	Specify the node name.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

62 -

Generate a kubeconfig file for the scheduler to use

Synopsis

Generate the kubeconfig file for the scheduler to use and save it to scheduler.conf file.

kubeadm init phase kubeconfig scheduler [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for scheduler
--kubeconfig-dir string Default: "/etc/kubernetes"
	The path where to save the kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

63 -

Generate a kubeconfig file for the super-admin

Synopsis

Generate a kubeconfig file for the super-admin, and save it to super-admin.conf file.

kubeadm init phase kubeconfig super-admin [flags]

Options

--apiserver-advertise-address string
	The IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	Port for the API Server to bind to.
--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--control-plane-endpoint string
	Specify a stable IP address or DNS name for the control plane.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for super-admin
--kubeconfig-dir string Default: "/etc/kubernetes"
	The path where to save the kubeconfig file.
--kubernetes-version string Default: "stable-1"
	Choose a specific Kubernetes version for the control plane.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

64 -

Updates settings relevant to the kubelet after TLS bootstrap

Synopsis

Updates settings relevant to the kubelet after TLS bootstrap

kubeadm init phase kubelet-finalize [flags]

Examples

  # Updates settings relevant to the kubelet after TLS bootstrap"
  kubeadm init phase kubelet-finalize all --config

Options

-h, --help
	help for kubelet-finalize

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

65 -

Run all kubelet-finalize phases

Synopsis

Run all kubelet-finalize phases

kubeadm init phase kubelet-finalize all [flags]

Examples

  # Updates settings relevant to the kubelet after TLS bootstrap"
  kubeadm init phase kubelet-finalize all --config

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for all

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

66 -

Enable kubelet client certificate rotation

Synopsis

Enable kubelet client certificate rotation

kubeadm init phase kubelet-finalize experimental-cert-rotation [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path where to save and store the certificates.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for experimental-cert-rotation

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

67 -

Write kubelet settings and (re)start the kubelet

Synopsis

Write a file with KubeletConfiguration and an environment file with node specific kubelet settings, and then (re)start kubelet.

kubeadm init phase kubelet-start [flags]

Examples

  # Writes a dynamic environment file with kubelet flags from a InitConfiguration file.
  kubeadm init phase kubelet-start --config config.yaml

Options

--config string
	Path to a kubeadm configuration file.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for kubelet-start
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from
--node-name string
	Specify the node name.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

68 -

Mark a node as a control-plane

Synopsis

Mark a node as a control-plane

kubeadm init phase mark-control-plane [flags]

Examples

  # Applies control-plane label and taint to the current node, functionally equivalent to what executed by kubeadm init.
  kubeadm init phase mark-control-plane --config config.yaml
  
  # Applies control-plane label and taint to a specific node
  kubeadm init phase mark-control-plane --node-name myNode

Options

--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for mark-control-plane
--node-name string
	Specify the node name.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

69 -

Run pre-flight checks

Synopsis

Run pre-flight checks for kubeadm init.

kubeadm init phase preflight [flags]

Examples

  # Run pre-flight checks for kubeadm init using a config file.
  kubeadm init phase preflight --config kubeadm-config.yaml

Options

--config string
	Path to a kubeadm configuration file.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for preflight
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
--image-repository string Default: "registry.k8s.io"
	Choose a container registry to pull control plane images from

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

70 -

Show the join command for control-plane and worker node

Synopsis

Show the join command for control-plane and worker node

kubeadm init phase show-join-command [flags]

Options

-h, --help
	help for show-join-command

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

71 -

Upload certificates to kubeadm-certs

Synopsis

Upload control plane certificates to the kubeadm-certs Secret

kubeadm init phase upload-certs [flags]

Options

--certificate-key string
	Key used to encrypt the control-plane certificates in the kubeadm-certs Secret. The certificate key is a hex encoded string that is an AES key of size 32 bytes.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for upload-certs
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--skip-certificate-key-print
	Don't print the key used to encrypt the control-plane certificates.
--upload-certs
	Upload control-plane certificates to the kubeadm-certs Secret.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

72 -

Upload the kubeadm and kubelet configuration to a ConfigMap

Synopsis

This command is not meant to be run on its own. See list of available subcommands.

kubeadm init phase upload-config [flags]

Options

-h, --help
	help for upload-config

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

73 -

Upload all configuration to a config map

Synopsis

Upload all configuration to a config map

kubeadm init phase upload-config all [flags]

Options

--config string
	Path to a kubeadm configuration file.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for all
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

74 -

Upload the kubeadm ClusterConfiguration to a ConfigMap

Synopsis

Upload the kubeadm ClusterConfiguration to a ConfigMap called kubeadm-config in the kube-system namespace. This enables correct configuration of system components and a seamless user experience when upgrading.

Alternatively, you can use kubeadm config.

kubeadm init phase upload-config kubeadm [flags]

Examples

  # upload the configuration of your cluster
  kubeadm init phase upload-config --config=myConfig.yaml

Options

--config string
	Path to a kubeadm configuration file.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for kubeadm
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

75 -

Upload the kubelet component config to a ConfigMap

Synopsis

Upload the kubelet configuration extracted from the kubeadm InitConfiguration object to a kubelet-config ConfigMap in the cluster

kubeadm init phase upload-config kubelet [flags]

Examples

  # Upload the kubelet configuration from the kubeadm Config file to a ConfigMap in the cluster.
  kubeadm init phase upload-config kubelet --config kubeadm.yaml

Options

--config string
	Path to a kubeadm configuration file.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for kubelet
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

76 -

Run this on any machine you wish to join an existing cluster

Synopsis

When joining a kubeadm initialized cluster, we need to establish bidirectional trust. This is split into discovery (having the Node trust the Kubernetes Control Plane) and TLS bootstrap (having the Kubernetes Control Plane trust the Node).

There are 2 main schemes for discovery. The first is to use a shared token along with the IP address of the API server. The second is to provide a file - a subset of the standard kubeconfig file. The discovery/kubeconfig file supports token, client-go authentication plugins ("exec"), "tokenFile", and "authProvider". This file can be a local file or downloaded via an HTTPS URL. The forms are kubeadm join --discovery-token abcdef.1234567890abcdef 1.2.3.4:6443, kubeadm join --discovery-file path/to/file.conf, or kubeadm join --discovery-file https://url/file.conf. Only one form can be used. If the discovery information is loaded from a URL, HTTPS must be used. Also, in that case the host installed CA bundle is used to verify the connection.

If you use a shared token for discovery, you should also pass the --discovery-token-ca-cert-hash flag to validate the public key of the root certificate authority (CA) presented by the Kubernetes Control Plane. The value of this flag is specified as "<hash-type>:<hex-encoded-value>", where the supported hash type is "sha256". The hash is calculated over the bytes of the Subject Public Key Info (SPKI) object (as in RFC7469). This value is available in the output of "kubeadm init" or can be calculated using standard tools. The --discovery-token-ca-cert-hash flag may be repeated multiple times to allow more than one public key.

If you cannot know the CA public key hash ahead of time, you can pass the --discovery-token-unsafe-skip-ca-verification flag to disable this verification. This weakens the kubeadm security model since other nodes can potentially impersonate the Kubernetes Control Plane.

The TLS bootstrap mechanism is also driven via a shared token. This is used to temporarily authenticate with the Kubernetes Control Plane to submit a certificate signing request (CSR) for a locally created key pair. By default, kubeadm will set up the Kubernetes Control Plane to automatically approve these signing requests. This token is passed in with the --tls-bootstrap-token abcdef.1234567890abcdef flag.

Often times the same token is used for both parts. In this case, the --token flag can be used instead of specifying each token individually.

The "join [api-server-endpoint]" command executes the following phases:

preflight              Run join pre-flight checks
control-plane-prepare  Prepare the machine for serving a control plane
  /download-certs        [EXPERIMENTAL] Download certificates shared among control-plane nodes from the kubeadm-certs Secret
  /certs                 Generate the certificates for the new control plane components
  /kubeconfig            Generate the kubeconfig for the new control plane components
  /control-plane         Generate the manifests for the new control plane components
kubelet-start          Write kubelet settings, certificates and (re)start the kubelet
control-plane-join     Join a machine as a control plane instance
  /etcd                  Add a new local etcd member
  /update-status         Register the new control-plane node into the ClusterStatus maintained in the kubeadm-config ConfigMap (DEPRECATED)
  /mark-control-plane    Mark a node as a control-plane

kubeadm join [api-server-endpoint] [flags]

Options

--apiserver-advertise-address string
	If the node should host a new control plane instance, the IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	If the node should host a new control plane instance, the port for the API Server to bind to.
--certificate-key string
	Use this key to decrypt the certificate secrets uploaded by init. The certificate key is a hex encoded string that is an AES key of size 32 bytes.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--discovery-file string
	For file-based discovery, a file or URL from which to load cluster information.
--discovery-token string
	For token-based discovery, the token used to validate cluster information fetched from the API server.
--discovery-token-ca-cert-hash strings
	For token-based discovery, validate that the root CA public key matches this hash (format: "<type>:<value>").
--discovery-token-unsafe-skip-ca-verification
	For token-based discovery, allow joining without --discovery-token-ca-cert-hash pinning.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for join
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
--node-name string
	Specify the node name.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--skip-phases strings
	List of phases to be skipped
--tls-bootstrap-token string
	Specify the token used to temporarily authenticate with the Kubernetes Control Plane while joining the node.
--token string
	Use this token for both discovery-token and tls-bootstrap-token when those values are not provided.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

77 -

Use this command to invoke single phase of the join workflow

Synopsis

Use this command to invoke single phase of the join workflow

Options

-h, --help
	help for phase

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

78 -

Join a machine as a control plane instance

Synopsis

Join a machine as a control plane instance

kubeadm join phase control-plane-join [flags]

Examples

  # Joins a machine as a control plane instance
  kubeadm join phase control-plane-join all

Options

-h, --help
	help for control-plane-join

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

79 -

Join a machine as a control plane instance

Synopsis

Join a machine as a control plane instance

kubeadm join phase control-plane-join all [flags]

Options

--apiserver-advertise-address string
	If the node should host a new control plane instance, the IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for all
--node-name string
	Specify the node name.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

80 -

Add a new local etcd member

Synopsis

Add a new local etcd member

kubeadm join phase control-plane-join etcd [flags]

Options

--apiserver-advertise-address string
	If the node should host a new control plane instance, the IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for etcd
--node-name string
	Specify the node name.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

81 -

Mark a node as a control-plane

Synopsis

Mark a node as a control-plane

kubeadm join phase control-plane-join mark-control-plane [flags]

Options

--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for mark-control-plane
--node-name string
	Specify the node name.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

82 -

Register the new control-plane node into the ClusterStatus maintained in the kubeadm-config ConfigMap (DEPRECATED)

Synopsis

Register the new control-plane node into the ClusterStatus maintained in the kubeadm-config ConfigMap (DEPRECATED)

kubeadm join phase control-plane-join update-status [flags]

Options

--apiserver-advertise-address string
	If the node should host a new control plane instance, the IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
-h, --help
	help for update-status
--node-name string
	Specify the node name.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

83 -

Prepare the machine for serving a control plane

Synopsis

Prepare the machine for serving a control plane

kubeadm join phase control-plane-prepare [flags]

Examples

  # Prepares the machine for serving a control plane
  kubeadm join phase control-plane-prepare all

Options

-h, --help
	help for control-plane-prepare

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

84 -

Prepare the machine for serving a control plane

Synopsis

Prepare the machine for serving a control plane

kubeadm join phase control-plane-prepare all [api-server-endpoint] [flags]

Options

--apiserver-advertise-address string
	If the node should host a new control plane instance, the IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	If the node should host a new control plane instance, the port for the API Server to bind to.
--certificate-key string
	Use this key to decrypt the certificate secrets uploaded by init. The certificate key is a hex encoded string that is an AES key of size 32 bytes.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--discovery-file string
	For file-based discovery, a file or URL from which to load cluster information.
--discovery-token string
	For token-based discovery, the token used to validate cluster information fetched from the API server.
--discovery-token-ca-cert-hash strings
	For token-based discovery, validate that the root CA public key matches this hash (format: "<type>:<value>").
--discovery-token-unsafe-skip-ca-verification
	For token-based discovery, allow joining without --discovery-token-ca-cert-hash pinning.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for all
--node-name string
	Specify the node name.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--tls-bootstrap-token string
	Specify the token used to temporarily authenticate with the Kubernetes Control Plane while joining the node.
--token string
	Use this token for both discovery-token and tls-bootstrap-token when those values are not provided.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

85 -

Generate the certificates for the new control plane components

Synopsis

Generate the certificates for the new control plane components

kubeadm join phase control-plane-prepare certs [api-server-endpoint] [flags]

Options

--apiserver-advertise-address string
	If the node should host a new control plane instance, the IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--discovery-file string
	For file-based discovery, a file or URL from which to load cluster information.
--discovery-token string
	For token-based discovery, the token used to validate cluster information fetched from the API server.
--discovery-token-ca-cert-hash strings
	For token-based discovery, validate that the root CA public key matches this hash (format: "<type>:<value>").
--discovery-token-unsafe-skip-ca-verification
	For token-based discovery, allow joining without --discovery-token-ca-cert-hash pinning.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for certs
--node-name string
	Specify the node name.
--tls-bootstrap-token string
	Specify the token used to temporarily authenticate with the Kubernetes Control Plane while joining the node.
--token string
	Use this token for both discovery-token and tls-bootstrap-token when those values are not provided.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

86 -

Generate the manifests for the new control plane components

Synopsis

Generate the manifests for the new control plane components

kubeadm join phase control-plane-prepare control-plane [flags]

Options

--apiserver-advertise-address string
	If the node should host a new control plane instance, the IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	If the node should host a new control plane instance, the port for the API Server to bind to.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for control-plane
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

87 -

[EXPERIMENTAL] Download certificates shared among control-plane nodes from the kubeadm-certs Secret

Synopsis

[EXPERIMENTAL] Download certificates shared among control-plane nodes from the kubeadm-certs Secret

kubeadm join phase control-plane-prepare download-certs [api-server-endpoint] [flags]

Options

--certificate-key string
	Use this key to decrypt the certificate secrets uploaded by init. The certificate key is a hex encoded string that is an AES key of size 32 bytes.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--discovery-file string
	For file-based discovery, a file or URL from which to load cluster information.
--discovery-token string
	For token-based discovery, the token used to validate cluster information fetched from the API server.
--discovery-token-ca-cert-hash strings
	For token-based discovery, validate that the root CA public key matches this hash (format: "<type>:<value>").
--discovery-token-unsafe-skip-ca-verification
	For token-based discovery, allow joining without --discovery-token-ca-cert-hash pinning.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for download-certs
--tls-bootstrap-token string
	Specify the token used to temporarily authenticate with the Kubernetes Control Plane while joining the node.
--token string
	Use this token for both discovery-token and tls-bootstrap-token when those values are not provided.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

88 -

Generate the kubeconfig for the new control plane components

Synopsis

Generate the kubeconfig for the new control plane components

kubeadm join phase control-plane-prepare kubeconfig [api-server-endpoint] [flags]

Options

--certificate-key string
	Use this key to decrypt the certificate secrets uploaded by init. The certificate key is a hex encoded string that is an AES key of size 32 bytes.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--discovery-file string
	For file-based discovery, a file or URL from which to load cluster information.
--discovery-token string
	For token-based discovery, the token used to validate cluster information fetched from the API server.
--discovery-token-ca-cert-hash strings
	For token-based discovery, validate that the root CA public key matches this hash (format: "<type>:<value>").
--discovery-token-unsafe-skip-ca-verification
	For token-based discovery, allow joining without --discovery-token-ca-cert-hash pinning.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for kubeconfig
--tls-bootstrap-token string
	Specify the token used to temporarily authenticate with the Kubernetes Control Plane while joining the node.
--token string
	Use this token for both discovery-token and tls-bootstrap-token when those values are not provided.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

89 -

Write kubelet settings, certificates and (re)start the kubelet

Synopsis

Write a file with KubeletConfiguration and an environment file with node specific kubelet settings, and then (re)start kubelet.

kubeadm join phase kubelet-start [api-server-endpoint] [flags]

Options

--config string
	Path to a kubeadm configuration file.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--discovery-file string
	For file-based discovery, a file or URL from which to load cluster information.
--discovery-token string
	For token-based discovery, the token used to validate cluster information fetched from the API server.
--discovery-token-ca-cert-hash strings
	For token-based discovery, validate that the root CA public key matches this hash (format: "<type>:<value>").
--discovery-token-unsafe-skip-ca-verification
	For token-based discovery, allow joining without --discovery-token-ca-cert-hash pinning.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for kubelet-start
--node-name string
	Specify the node name.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--tls-bootstrap-token string
	Specify the token used to temporarily authenticate with the Kubernetes Control Plane while joining the node.
--token string
	Use this token for both discovery-token and tls-bootstrap-token when those values are not provided.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

90 -

Run join pre-flight checks

Synopsis

Run pre-flight checks for kubeadm join.

kubeadm join phase preflight [api-server-endpoint] [flags]

Examples

  # Run join pre-flight checks using a config file.
  kubeadm join phase preflight --config kubeadm-config.yaml

Options

--apiserver-advertise-address string
	If the node should host a new control plane instance, the IP address the API Server will advertise it's listening on. If not set the default network interface will be used.
--apiserver-bind-port int32 Default: 6443
	If the node should host a new control plane instance, the port for the API Server to bind to.
--certificate-key string
	Use this key to decrypt the certificate secrets uploaded by init. The certificate key is a hex encoded string that is an AES key of size 32 bytes.
--config string
	Path to a kubeadm configuration file.
--control-plane
	Create a new control plane instance on this node
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--discovery-file string
	For file-based discovery, a file or URL from which to load cluster information.
--discovery-token string
	For token-based discovery, the token used to validate cluster information fetched from the API server.
--discovery-token-ca-cert-hash strings
	For token-based discovery, validate that the root CA public key matches this hash (format: "<type>:<value>").
--discovery-token-unsafe-skip-ca-verification
	For token-based discovery, allow joining without --discovery-token-ca-cert-hash pinning.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for preflight
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
--node-name string
	Specify the node name.
--tls-bootstrap-token string
	Specify the token used to temporarily authenticate with the Kubernetes Control Plane while joining the node.
--token string
	Use this token for both discovery-token and tls-bootstrap-token when those values are not provided.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

91 -

Kubeconfig file utilities

Synopsis

Kubeconfig file utilities.

Options

-h, --help
	help for kubeconfig

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

92 -

Output a kubeconfig file for an additional user

Synopsis

Output a kubeconfig file for an additional user.

kubeadm kubeconfig user [flags]

Examples

  # Output a kubeconfig file for an additional user named foo
  kubeadm kubeconfig user --client-name=foo
  
  # Output a kubeconfig file for an additional user named foo using a kubeadm config file bar
  kubeadm kubeconfig user --client-name=foo --config=bar

Options

--client-name string
	The name of user. It will be used as the CN if client certificates are created
--config string
	Path to a kubeadm configuration file.
-h, --help
	help for user
--org strings
	The organizations of the client certificate. It will be used as the O if client certificates are created
--token string
	The token that should be used as the authentication mechanism for this kubeconfig, instead of client certificates
--validity-period duration Default: 8760h0m0s
	The validity period of the client certificate. It is an offset from the current time.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

93 -

Performs a best effort revert of changes made to this host by 'kubeadm init' or 'kubeadm join'

Synopsis

Performs a best effort revert of changes made to this host by 'kubeadm init' or 'kubeadm join'

The "reset" command executes the following phases:

preflight           Run reset pre-flight checks
remove-etcd-member  Remove a local etcd member.
cleanup-node        Run cleanup node.

kubeadm reset [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path to the directory where the certificates are stored. If specified, clean this directory.
--cleanup-tmp-dir
	Cleanup the "/etc/kubernetes/tmp" directory
--config string
	Path to a kubeadm configuration file.
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--dry-run
	Don't apply any changes; just output what would be done.
-f, --force
	Reset the node without prompting for confirmation.
-h, --help
	help for reset
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--skip-phases strings
	List of phases to be skipped

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

94 -

Use this command to invoke single phase of the reset workflow

Synopsis

Use this command to invoke single phase of the reset workflow

Options

-h, --help
	help for phase

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

95 -

Run cleanup node.

Synopsis

Run cleanup node.

kubeadm reset phase cleanup-node [flags]

Options

--cert-dir string Default: "/etc/kubernetes/pki"
	The path to the directory where the certificates are stored. If specified, clean this directory.
--cleanup-tmp-dir
	Cleanup the "/etc/kubernetes/tmp" directory
--cri-socket string
	Path to the CRI socket to connect. If empty kubeadm will try to auto-detect this value; use this option only if you have more than one CRI installed or if you have non-standard CRI socket.
--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for cleanup-node

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

96 -

Run reset pre-flight checks

Synopsis

Run pre-flight checks for kubeadm reset.

kubeadm reset phase preflight [flags]

Options

--dry-run
	Don't apply any changes; just output what would be done.
-f, --force
	Reset the node without prompting for confirmation.
-h, --help
	help for preflight
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

97 -

Remove a local etcd member.

Synopsis

Remove a local etcd member for a control plane node.

kubeadm reset phase remove-etcd-member [flags]

Options

--dry-run
	Don't apply any changes; just output what would be done.
-h, --help
	help for remove-etcd-member
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

98 -

Manage bootstrap tokens

Synopsis

This command manages bootstrap tokens. It is optional and needed only for advanced use cases.

In short, bootstrap tokens are used for establishing bidirectional trust between a client and a server. A bootstrap token can be used when a client (for example a node that is about to join the cluster) needs to trust the server it is talking to. Then a bootstrap token with the "signing" usage can be used. bootstrap tokens can also function as a way to allow short-lived authentication to the API Server (the token serves as a way for the API Server to trust the client), for example for doing the TLS Bootstrap.

What is a bootstrap token more exactly?

It is a Secret in the kube-system namespace of type "bootstrap.kubernetes.io/token".
A bootstrap token must be of the form "[a-z0-9]{6}.[a-z0-9]{16}". The former part is the public token ID, while the latter is the Token Secret and it must be kept private at all circumstances!
The name of the Secret must be named "bootstrap-token-(token-id)".

You can read more about bootstrap tokens here: https://kubernetes.io/docs/admin/bootstrap-tokens/

kubeadm token [flags]

Options

--dry-run
	Whether to enable dry-run mode or not
-h, --help
	help for token
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

99 -

Create bootstrap tokens on the server

Synopsis

This command will create a bootstrap token for you. You can specify the usages for this token, the "time to live" and an optional human friendly description.

The [token] is the actual token to write. This should be a securely generated random token of the form "[a-z0-9]{6}.[a-z0-9]{16}". If no [token] is given, kubeadm will generate a random token instead.

kubeadm token create [token]

Options

--certificate-key string
	When used together with '--print-join-command', print the full 'kubeadm join' flag needed to join the cluster as a control-plane. To create a new certificate key you must use 'kubeadm init phase upload-certs --upload-certs'.
--config string
	Path to a kubeadm configuration file.
--description string
	A human friendly description of how this token is used.
--groups strings Default: "system:bootstrappers:kubeadm:default-node-token"
	Extra groups that this token will authenticate as when used for authentication. Must match "\Asystem:bootstrappers:[a-z0-9:-]{0,255}[a-z0-9]\z"
-h, --help
	help for create
--print-join-command
	Instead of printing only the token, print the full 'kubeadm join' flag needed to join the cluster using the token.
--ttl duration Default: 24h0m0s
	The duration before the token is automatically deleted (e.g. 1s, 2m, 3h). If set to '0', the token will never expire
--usages strings Default: "signing,authentication"
	Describes the ways in which this token can be used. You can pass --usages multiple times or provide a comma separated list of options. Valid options: [signing,authentication]

Options inherited from parent commands

--dry-run
	Whether to enable dry-run mode or not
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

100 -

Delete bootstrap tokens on the server

Synopsis

This command will delete a list of bootstrap tokens for you.

The [token-value] is the full Token of the form "[a-z0-9]{6}.[a-z0-9]{16}" or the Token ID of the form "[a-z0-9]{6}" to delete.

kubeadm token delete [token-value] ...

Options

-h, --help
	help for delete

Options inherited from parent commands

--dry-run
	Whether to enable dry-run mode or not
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

101 -

Generate and print a bootstrap token, but do not create it on the server

Synopsis

This command will print out a randomly-generated bootstrap token that can be used with the "init" and "join" commands.

You don't have to use this command in order to generate a token. You can do so yourself as long as it is in the format "[a-z0-9]{6}.[a-z0-9]{16}". This command is provided for convenience to generate tokens in the given format.

You can also use "kubeadm init" without specifying a token and it will generate and print one for you.

kubeadm token generate [flags]

Options

-h, --help
	help for generate

Options inherited from parent commands

--dry-run
	Whether to enable dry-run mode or not
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

102 -

List bootstrap tokens on the server

Synopsis

This command will list all bootstrap tokens for you.

kubeadm token list [flags]

Options

--allow-missing-template-keys Default: true
	If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats.
-o, --experimental-output string Default: "text"
	Output format. One of: text\|json\|yaml\|go-template\|go-template-file\|template\|templatefile\|jsonpath\|jsonpath-as-json\|jsonpath-file.
-h, --help
	help for list
--show-managed-fields
	If true, keep the managedFields when printing objects in JSON or YAML format.

Options inherited from parent commands

--dry-run
	Whether to enable dry-run mode or not
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

103 -

Upgrade your cluster smoothly to a newer version with this command

Synopsis

Upgrade your cluster smoothly to a newer version with this command

kubeadm upgrade [flags]

Options

-h, --help
	help for upgrade

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

104 -

Upgrade your Kubernetes cluster to the specified version

Synopsis

Upgrade your Kubernetes cluster to the specified version

kubeadm upgrade apply [version]

Options

--allow-experimental-upgrades
	Show unstable versions of Kubernetes as an upgrade alternative and allow upgrading to an alpha/beta/release candidate versions of Kubernetes.
--allow-release-candidate-upgrades
	Show release candidate versions of Kubernetes as an upgrade alternative and allow upgrading to a release candidate versions of Kubernetes.
--certificate-renewal Default: true
	Perform the renewal of certificates used by component changed during upgrades.
--config string
	Path to a kubeadm configuration file.
--dry-run
	Do not change any state, just output what actions would be performed.
--etcd-upgrade Default: true
	Perform the upgrade of etcd.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-f, --force
	Force upgrading although some requirements might not be met. This also implies non-interactive mode.
-h, --help
	help for apply
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--print-config
	Specifies whether the configuration file that will be used in the upgrade should be printed or not.
-y, --yes
	Perform the upgrade and do not prompt for confirmation (non-interactive mode).

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

105 -

Show what differences would be applied to existing static pod manifests. See also: kubeadm upgrade apply --dry-run

Synopsis

Show what differences would be applied to existing static pod manifests. See also: kubeadm upgrade apply --dry-run

kubeadm upgrade diff [version] [flags]

Options

--api-server-manifest string Default: "/etc/kubernetes/manifests/kube-apiserver.yaml"
	path to API server manifest
--config string
	Path to a kubeadm configuration file.
-c, --context-lines int Default: 3
	How many lines of context in the diff
--controller-manager-manifest string Default: "/etc/kubernetes/manifests/kube-controller-manager.yaml"
	path to controller manifest
-h, --help
	help for diff
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--scheduler-manifest string Default: "/etc/kubernetes/manifests/kube-scheduler.yaml"
	path to scheduler manifest

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

106 -

Upgrade commands for a node in the cluster

Synopsis

Upgrade commands for a node in the cluster

The "node" command executes the following phases:

preflight       Run upgrade node pre-flight checks
control-plane   Upgrade the control plane instance deployed on this node, if any
kubelet-config  Upgrade the kubelet configuration for this node

kubeadm upgrade node [flags]

Options

--certificate-renewal Default: true
	Perform the renewal of certificates used by component changed during upgrades.
--dry-run
	Do not change any state, just output the actions that would be performed.
--etcd-upgrade Default: true
	Perform the upgrade of etcd.
-h, --help
	help for node
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.
--skip-phases strings
	List of phases to be skipped

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

107 -

Use this command to invoke single phase of the node workflow

Synopsis

Use this command to invoke single phase of the node workflow

Options

-h, --help
	help for phase

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

108 -

Upgrade the control plane instance deployed on this node, if any

Synopsis

Upgrade the control plane instance deployed on this node, if any

kubeadm upgrade node phase control-plane [flags]

Options

--certificate-renewal Default: true
	Perform the renewal of certificates used by component changed during upgrades.
--dry-run
	Do not change any state, just output the actions that would be performed.
--etcd-upgrade Default: true
	Perform the upgrade of etcd.
-h, --help
	help for control-plane
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

109 -

Upgrade the kubelet configuration for this node

Synopsis

Download the kubelet configuration from the kubelet-config ConfigMap stored in the cluster

kubeadm upgrade node phase kubelet-config [flags]

Options

--dry-run
	Do not change any state, just output the actions that would be performed.
-h, --help
	help for kubelet-config
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
--patches string
	Path to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determine which patches are applied first alpha-numerically.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

110 -

Run upgrade node pre-flight checks

Synopsis

Run pre-flight checks for kubeadm upgrade node.

kubeadm upgrade node phase preflight [flags]

Options

-h, --help
	help for preflight
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

111 -

Check which versions are available to upgrade to and validate whether your current cluster is upgradeable. To skip the internet check, pass in the optional [version] parameter

Synopsis

Check which versions are available to upgrade to and validate whether your current cluster is upgradeable. To skip the internet check, pass in the optional [version] parameter

kubeadm upgrade plan [version] [flags]

Options

--allow-experimental-upgrades
	Show unstable versions of Kubernetes as an upgrade alternative and allow upgrading to an alpha/beta/release candidate versions of Kubernetes.
--allow-release-candidate-upgrades
	Show release candidate versions of Kubernetes as an upgrade alternative and allow upgrading to a release candidate versions of Kubernetes.
--config string
	Path to a kubeadm configuration file.
--feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: EtcdLearnerMode=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (DEPRECATED - default=false) RootlessControlPlane=true\|false (ALPHA - default=false) UpgradeAddonsBeforeControlPlane=true\|false (DEPRECATED - default=false)
-h, --help
	help for plan
--ignore-preflight-errors strings
	A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
--kubeconfig string Default: "/etc/kubernetes/admin.conf"
	The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.
-o, --output string Default: "text"
	EXPERIMENTAL: Output format. One of: text\|json\|yaml.
--print-config
	Specifies whether the configuration file that will be used in the upgrade should be printed or not.
--show-managed-fields
	If true, keep the managedFields when printing objects in JSON or YAML format.

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

112 -

Print the version of kubeadm

Synopsis

Print the version of kubeadm

kubeadm version [flags]

Options

-h, --help
	help for version
-o, --output string
	Output format; available options are 'yaml', 'json' and 'short'

Options inherited from parent commands

--rootfs string
	[EXPERIMENTAL] The path to the 'real' host root filesystem.

113 -

All files in this directory are auto-generated from other repos. Do not edit them manually. You must edit them in their upstream repo.