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Design docs, concept definitions, and references for APIs and CLIs.

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kubeadm config

Beginning with v1.8.0, kubeadm uploads the configuration of your cluster to a ConfigMap called kubeadm-config in the kube-system namespace, and later reads the ConfigMap when upgrading. This enables correct configuration of system components, and provides a seamless user experience.

You can execute kubeadm config view to view the ConfigMap. If you initialized your cluster using kubeadm v1.7.x or lower, you must use kubeadm config upload to create the ConfigMap before you may use kubeadm upgrade.

kubeadm config upload from-file

Upload a configuration file to the in-cluster ConfigMap for kubeadm configuration.

Synopsis

Using this command, you can upload configuration to the ConfigMap in the cluster using the same config file you gave to ‘kubeadm init’. If you initialized your cluster using a v1.7.x or lower kubeadm client and used the –config option, you need to run this command with the same config file before upgrading to v1.8 using ‘kubeadm upgrade’.

The configuration is located in the “kube-system” namespace in the “kubeadm-config” ConfigMap.

kubeadm config upload from-file [flags]

Options

      --config string   Path to a kubeadm config file. WARNING: Usage of a configuration file is experimental.
  -h, --help            help for from-file

Options inherited from parent commands

      --kubeconfig string   The KubeConfig file to use when talking to the cluster. (default "/etc/kubernetes/admin.conf")

kubeadm config upload from-flags

Create the in-cluster configuration file for the first time from using flags.

Synopsis

Using this command, you can upload configuration to the ConfigMap in the cluster using the same flags you gave to ‘kubeadm init’. If you initialized your cluster using a v1.7.x or lower kubeadm client and set certain flags, you need to run this command with the same flags before upgrading to v1.8 using ‘kubeadm upgrade’.

The configuration is located in the “kube-system” namespace in the “kubeadm-config” ConfigMap.

kubeadm config upload from-flags [flags]

Options

      --apiserver-advertise-address string   The IP address the API Server will advertise it's listening on. Specify '0.0.0.0' to use the address of the default network interface.
      --apiserver-bind-port int32            Port for the API Server to bind to. (default 6443)
      --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")
      --cri-socket string                    Specify the CRI socket to connect to. (default "/var/run/dockershim.sock")
      --feature-gates string                 A set of key=value pairs that describe feature gates for various features. Options are:
Auditing=true|false (ALPHA - default=false)
CoreDNS=true|false (BETA - default=false)
DynamicKubeletConfig=true|false (ALPHA - default=false)
SelfHosting=true|false (ALPHA - default=false)
StoreCertsInSecrets=true|false (ALPHA - default=false)
  -h, --help                                 help for from-flags
      --kubernetes-version string            Choose a specific Kubernetes version for the control plane. (default "stable-1.10")
      --node-name string                     Specify the node name.
      --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")
      --token string                         The token to use for establishing bidirectional trust between nodes and masters.
      --token-ttl duration                   The duration before the bootstrap token is automatically deleted. If set to '0', the token will never expire. (default 24h0m0s)

Options inherited from parent commands

      --kubeconfig string   The KubeConfig file to use when talking to the cluster. (default "/etc/kubernetes/admin.conf")

kubeadm config view

View the kubeadm configuration stored inside the cluster.

Synopsis

Using this command, you can view the ConfigMap in the cluster where the configuration for kubeadm is located.

The configuration is located in the “kube-system” namespace in the “kubeadm-config” ConfigMap.

kubeadm config view [flags]

Options

  -h, --help   help for view

Options inherited from parent commands

      --kubeconfig string   The KubeConfig file to use when talking to the cluster. (default "/etc/kubernetes/admin.conf")

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