kubeadm init phase

kubeadm init phase is consistent with the kubeadm init workflow, and behind the scene both use the same code.

Using this command you can execute preflight checks on a control-plane node.

Run pre-flight checks

Run pre-flight checks for kubeadm init.

Examples

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

Options

Options inherited from parent commands

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

kubeadm init phase kubelet-start

This phase will write the kubelet configuration file and environment file and then start the kubelet.

kubelet-start

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.
-h, —help
	help for kubelet-start
—node-name string
	Specify the node name.

Options inherited from parent commands

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

kubeadm init phase certs

Can be used to create all required certificates by kubeadm.

certs
ca
apiserver-kubelet-client
front-proxy-client
etcd-server
healthcheck-client
sa

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.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-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.

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.

Alpha Disclaimer: this command is currently alpha.

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.
-h, —help
	help for apiserver-etcd-client
—kubernetes-version string Default: “stable-1”

Options inherited from parent commands

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

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.

Alpha Disclaimer: this command is currently alpha.

kubeadm init phase certs sa [flags]

Options inherited from parent commands

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

kubeadm init phase kubeconfig

You can create all required kubeconfig files by calling the all subcommand or call them individually.

kubeconfig
admin
controller-manager

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.

Options

-h, —help
	help for kubeconfig

Options inherited from parent commands

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

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.
-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.

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.
-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.

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.
-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.

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.
-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.

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.
-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.

Using this phase you can create all required static Pod files for the control plane components.

control-plane
apiserver
scheduler

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.

Generate all static Pod manifest files

Synopsis

Generate all static Pod manifest files

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: IPv6DualStack=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (ALPHA - default=false) RootlessControlPlane=true\|false (ALPHA - default=false)
-h, —help
	help for all
—image-repository string Default: “k8s.gcr.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”. “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.

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: IPv6DualStack=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (ALPHA - default=false) RootlessControlPlane=true\|false (ALPHA - default=false)
-h, —help
	help for apiserver
—image-repository string Default: “k8s.gcr.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”. “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.

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: “k8s.gcr.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”. “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.

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: “k8s.gcr.io”

—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”. “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.

kubeadm init phase etcd

Use the following phase to create a local etcd instance based on a static Pod file.

etcd

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.

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.
-h, —help
	help for local
—image-repository string Default: “k8s.gcr.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”. “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.

kubeadm init phase upload-config

You can use this command to upload the kubeadm configuration to your cluster. Alternatively, you can use kubeadm config.

all
kubelet

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

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

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.
-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.

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.

Examples

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

Options

—config string
	Path to a kubeadm configuration file.
-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.

Upload the kubelet component config to a ConfigMap

Synopsis

Upload kubelet configuration extracted from the kubeadm InitConfiguration object to a ConfigMap of the form kubelet-config-1.X in the cluster, where X is the minor version of the current (API Server) Kubernetes version.

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.
-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.

kubeadm init phase upload-certs

Use the following phase to upload control-plane certificates to the cluster. By default the certs and encryption key expire after two hours.

Upload certificates to kubeadm-certs

Synopsis

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

kubeadm init phase upload-certs [flags]

Options

—certificate-key string
	Key used to encrypt the control-plane certificates in the kubeadm-certs Secret.
—config string
	Path to a kubeadm configuration file.
-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.

Use the following phase to label and taint the node with the key-value pair.

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.
-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.

kubeadm init phase bootstrap-token

Use the following phase to configure bootstrap tokens.

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.
-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.

kubeadm init phase kubelet-finalize

Use the following phase to update settings relevant to the kubelet after TLS bootstrap. You can use the all subcommand to run all kubelet-finalize phases.

kubelet-finalize-all

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.

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.
-h, —help
	help for all

Options inherited from parent commands

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

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.
-h, —help
	help for experimental-cert-rotation

Options inherited from parent commands

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

kubeadm init phase addon

You can install all the available addons with the all subcommand, or install them selectively.

addon
coredns

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.

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.
—feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: IPv6DualStack=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (ALPHA - default=false) RootlessControlPlane=true\|false (ALPHA - default=false)
-h, —help
	help for all
—image-repository string Default: “k8s.gcr.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.

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.
—feature-gates string
	A set of key=value pairs that describe feature gates for various features. Options are: IPv6DualStack=true\|false (BETA - default=true) PublicKeysECDSA=true\|false (ALPHA - default=false) RootlessControlPlane=true\|false (ALPHA - default=false)
-h, —help
	help for coredns
—image-repository string Default: “k8s.gcr.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.
—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.

Install the kube-proxy addon to a Kubernetes cluster

Synopsis

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

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.
-h, —help
	help for kube-proxy
—image-repository string Default: “k8s.gcr.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.

—rootfs string
	[EXPERIMENTAL] The path to the ‘real’ host root filesystem.

For more details on each field in the v1beta3 configuration you can navigate to our

kubeadm init to bootstrap a Kubernetes control-plane node
to connect a node to the cluster
kubeadm reset to revert any changes made to this host by kubeadm init or kubeadm join
to try experimental functionality