kubeadm init phase
In v1.8.0, kubeadm introduced the kubeadm alpha phase command with the aim of making kubeadm more modular. In v1.13.0 this command graduated to kubeadm init phase. This modularity enables you to invoke atomic sub-steps of the bootstrap process. Hence, you can let kubeadm do some parts and fill in yourself where you need customizations.
kubeadm init phase is consistent with the kubeadm init workflow,
and behind the scene both use the same code.
kubeadm init phase preflight
Using this command you can execute preflight checks on a control-plane node.
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.yml
Options
--config string Path to a kubeadm configuration file.
-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.
kubeadm init phase certs
Can be used to create all required certificates by kubeadm.
- certs
- all
- apiserver-etcd-client
- apiserver-kubelet-client
- apiserver
- ca
- etcd-ca
- healthcheck-client
- etcd-peer
- etcd-server
- front-proxy-ca
- front-proxy-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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for all
--service-cidr string Use alternative range of IP address for service VIPs. (default "10.96.0.0/12")
--service-dns-domain string Use alternative domain for services, e.g. "myorg.internal". (default "cluster.local")
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.cert 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--csr-dir string The path to output the CSRs and private keys to
--csr-only Create CSRs instead of generating certificates
-h, --help help for apiserver-etcd-client
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.cert 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--csr-dir string The path to output the CSRs and private keys to
--csr-only Create CSRs instead of generating certificates
-h, --help help for apiserver-kubelet-client
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.cert and apiserver.key files.
Default SANs are kubernetes, kubernetes.default, kubernetes.default.svc, kubernetes.default.svc.cluster.local, 10.96.0.1, 127.0.0.1
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 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--csr-dir string The path to output the CSRs and private keys to
--csr-only Create CSRs instead of generating certificates
-h, --help help for apiserver
--service-cidr string Use alternative range of IP address for service VIPs. (default "10.96.0.0/12")
--service-dns-domain string Use alternative domain for services, e.g. "myorg.internal". (default "cluster.local")
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.cert 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for ca
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.cert 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for etcd-ca
Options inherited from parent commands
--rootfs string [EXPERIMENTAL] The path to the 'real' host root filesystem.
Generate the certificate for liveness probes to healtcheck etcd
Synopsis
Generate the certificate for liveness probes to healtcheck etcd, and save them into etcd/healthcheck-client.cert 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--csr-dir string The path to output the CSRs and private keys to
--csr-only Create CSRs instead of generating certificates
-h, --help help for etcd-healthcheck-client
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.cert 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--csr-dir string The path to output the CSRs and private keys to
--csr-only Create CSRs instead of generating certificates
-h, --help help for etcd-peer
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.cert 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.
kubeadm init phase certs etcd-server [flags]
Options
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--csr-dir string The path to output the CSRs and private keys to
--csr-only Create CSRs instead of generating certificates
-h, --help help for etcd-server
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.cert 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for front-proxy-ca
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.cert 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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--csr-dir string The path to output the CSRs and private keys to
--csr-only Create CSRs instead of generating certificates
-h, --help help for front-proxy-client
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
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
-h, --help help for sa
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.
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.
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 Port for the API Server to bind to. (default 6443)
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for all
--kubeconfig-dir string The path where to save the kubeconfig file. (default "/etc/kubernetes")
--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 Port for the API Server to bind to. (default 6443)
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for admin
--kubeconfig-dir string The path where to save the kubeconfig file. (default "/etc/kubernetes")
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 Port for the API Server to bind to. (default 6443)
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for controller-manager
--kubeconfig-dir string The path where to save the kubeconfig file. (default "/etc/kubernetes")
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 Port for the API Server to bind to. (default 6443)
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for kubelet
--kubeconfig-dir string The path where to save the kubeconfig file. (default "/etc/kubernetes")
--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 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 Port for the API Server to bind to. (default 6443)
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for scheduler
--kubeconfig-dir string The path where to save the kubeconfig file. (default "/etc/kubernetes")
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.
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 control-plane
Using this phase you can create all required static Pod files for the control plane components.
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
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 Port for the API Server to bind to. (default 6443)
--apiserver-extra-args mapStringString A set of extra flags to pass to the API Server or override default ones in form of <flagname>=<value>
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--controller-manager-extra-args mapStringString A set of extra flags to pass to the Controller Manager or override default ones in form of <flagname>=<value>
--feature-gates string A set of key=value pairs that describe feature gates for various features. No feature gates are available in this release.
-h, --help help for all
--image-repository string Choose a container registry to pull control plane images from (default "k8s.gcr.io")
--kubernetes-version string Choose a specific Kubernetes version for the control plane. (default "stable-1")
--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 mapStringString A set of extra flags to pass to the Scheduler or override default ones in form of <flagname>=<value>
--service-cidr string Use alternative range of IP address for service VIPs. (default "10.96.0.0/12")
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 Port for the API Server to bind to. (default 6443)
--apiserver-extra-args mapStringString A set of extra flags to pass to the API Server or override default ones in form of <flagname>=<value>
--cert-dir string The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--feature-gates string A set of key=value pairs that describe feature gates for various features. No feature gates are available in this release.
-h, --help help for apiserver
--image-repository string Choose a container registry to pull control plane images from (default "k8s.gcr.io")
--kubernetes-version string Choose a specific Kubernetes version for the control plane. (default "stable-1")
--service-cidr string Use alternative range of IP address for service VIPs. (default "10.96.0.0/12")
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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
--controller-manager-extra-args mapStringString A set of extra flags to pass to the Controller Manager or override default ones in form of <flagname>=<value>
-h, --help help for controller-manager
--image-repository string Choose a container registry to pull control plane images from (default "k8s.gcr.io")
--kubernetes-version string Choose a specific Kubernetes version for the control plane. (default "stable-1")
--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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for scheduler
--image-repository string Choose a container registry to pull control plane images from (default "k8s.gcr.io")
--kubernetes-version string Choose a specific Kubernetes version for the control plane. (default "stable-1")
--scheduler-extra-args mapStringString 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.
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 The path where to save and store the certificates. (default "/etc/kubernetes/pki")
--config string Path to a kubeadm configuration file.
-h, --help help for local
--image-repository string Choose a container registry to pull control plane images from (default "k8s.gcr.io")
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
--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. | |
kubeadm init phase mark-control-plane
Use the following phase to label and taint the node with the node-role.kubernetes.io/master="" 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.yml
# 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 the 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 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. (default "/etc/kubernetes/admin.conf")
--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 upload-config
You can use this command to upload the kubeadm configuration to your cluster. Alternatively, you can use kubeadm config.
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.
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 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. (default "/etc/kubernetes/admin.conf")
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.
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.
-h, --help help for kubeadm
--kubeconfig string 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. (default "/etc/kubernetes/admin.conf")
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 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. (default "/etc/kubernetes/admin.conf")
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.
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 Port for the API Server to bind to. (default 6443)
--config string Path to a kubeadm configuration file.
--feature-gates string A set of key=value pairs that describe feature gates for various features. No feature gates are available in this release.
-h, --help help for all
--image-repository string Choose a container registry to pull control plane images from (default "k8s.gcr.io")
--kubeconfig string 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. (default "/etc/kubernetes/admin.conf")
--kubernetes-version string Choose a specific Kubernetes version for the control plane. (default "stable-1")
--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 Use alternative range of IP address for service VIPs. (default "10.96.0.0/12")
--service-dns-domain string Use alternative domain for services, e.g. "myorg.internal". (default "cluster.local")
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.
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 Port for the API Server to bind to. (default 6443)
--config string Path to a kubeadm configuration file.
-h, --help help for kube-proxy
--image-repository string Choose a container registry to pull control plane images from (default "k8s.gcr.io")
--kubeconfig string 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. (default "/etc/kubernetes/admin.conf")
--kubernetes-version string Choose a specific Kubernetes version for the control plane. (default "stable-1")
--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.
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. No feature gates are available in this release.
-h, --help help for coredns
--image-repository string Choose a container registry to pull control plane images from (default "k8s.gcr.io")
--kubeconfig string 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. (default "/etc/kubernetes/admin.conf")
--kubernetes-version string Choose a specific Kubernetes version for the control plane. (default "stable-1")
--service-cidr string Use alternative range of IP address for service VIPs. (default "10.96.0.0/12")
--service-dns-domain string Use alternative domain for services, e.g. "myorg.internal". (default "cluster.local")
Options inherited from parent commands
--rootfs string [EXPERIMENTAL] The path to the 'real' host root filesystem.
To use kube-dns instead of CoreDNS you have to pass a configuration file:
# for installing a DNS addon only
kubeadm init phase addon coredns --config=someconfig.yaml
# for creating a complete control plane node
kubeadm init --config=someconfig.yaml
# for listing or pulling images
kubeadm config images list/pull --config=someconfig.yaml
# for upgrades
kubeadm upgrade apply --config=someconfig.yamlThe file has to contain a DNS field inClusterConfiguration
and also a type for the addon - kube-dns (default value is CoreDNS).
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
dns:
type: "kube-dns"For more details on each field in the v1beta2 configuration you can navigate to our
API reference pages.
What’s next
- kubeadm init to bootstrap a Kubernetes control-plane node
- kubeadm join to connect a node to the cluster
- kubeadm reset to revert any changes made to this host by
kubeadm initorkubeadm join - kubeadm alpha to try experimental functionality
Feedback
Was this page helpful?
Thanks for the feedback. If you have a specific, answerable question about how to use Kubernetes, ask it on Stack Overflow. Open an issue in the GitHub repo if you want to report a problem or suggest an improvement.
Page last modified on September 12, 2019 at 6:16 PM PST by
Update kubeadm-init-phase.md (#16335) (Page History)