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kubeadm reset

This command reverts any changes made by kubeadm init or kubeadm join.

Run this to revert any changes made to this host by ‘kubeadm init’ or ‘kubeadm join’

Synopsis

Run this to revert any changes made to this host by ‘kubeadm init’ or ‘kubeadm join’

The “reset” command executes the following phases:

preflight              Run reset pre-flight checks
update-cluster-status  Remove this node from the ClusterStatus object.
remove-etcd-member     Remove a local etcd member.
cleanup-node           Run cleanup node.
kubeadm reset [flags]

Options

      --cert-dir string                   The path to the directory where the certificates are stored. If specified, clean this directory. (default "/etc/kubernetes/pki")
      --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.
  -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                 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-phases strings               List of phases to be skipped

Options inherited from parent commands

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

Reset workflow

kubeadm reset is responsible for cleaning up a node local file system from files that were created using the kubeadm init or kubeadm join commands. For control-plane nodes reset also removes the local stacked etcd member of this node from the etcd cluster and also removes this node’s information from the kubeadm ClusterStatus object. ClusterStatus is a kubeadm managed Kubernetes API object that holds a list of kube-apiserver endpoints.

kubeadm reset phase can be used to execute the separate phases of the above workflow. To skip a list of phases you can use the --skip-phases flag, which works in a similar way to the kubeadm join and kubeadm init phase runners.

External etcd clean up

kubeadm reset will not delete any etcd data if external etcd is used. This means that if you run kubeadm init again using the same etcd endpoints, you will see state from previous clusters.

To wipe etcd data it is recommended you use a client like etcdctl, such as:

etcdctl del "" --prefix

See the etcd documentation for more information.

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