When a cluster is no longer needed and needs to be torn down, Rook has a Cleanup guide with instructions to tear it down cleanly. While following that document is highly preferred, there is a command that will automate the cleanup of Rook after applications are removed.
The destroy-cluster command destroys a Rook cluster and deletes CRs (custom resources) by force removing any finalizers that may be preventing the cleanup.
This command is not reversible, and it will destroy your Rook cluster completely with guaranteed data loss. Only use this command if you are 100% sure that the cluster and its data should be destroyed.
To destroy a cluster, run the command:
$ kubectl rook-ceph destroy-cluster
Warning: Are you sure you want to destroy the cluster in namespace "rook-ceph"? If absolutely certain, enter: yes-really-destroy-clusterAny other response will cause the command to abort.
$ kubectl rook-ceph -n rook-ceph destroy-cluster
Warning: Are you sure you want to destroy the cluster in namespace "rook-ceph"? If absolutely certain, enter: yes-really-destroy-cluster
yes-really-destroy-cluster
Info: proceeding
Info: getting resource kind cephclusters
Info: removing resource cephclusters: my-cluster
Info: resource "my-cluster" is not yet deleted, applying patch to remove finalizer...
Info: resource my-cluster was deleted
Info: getting resource kind cephblockpoolradosnamespaces
Info: resource cephblockpoolradosnamespaces was not found on the cluster
Info: getting resource kind cephblockpools
Info: removing resource cephblockpools: builtin-mgr
Info: resource builtin-mgr was deleted
Info: getting resource kind cephbucketnotifications
Info: resource cephbucketnotifications was not found on the cluster
Info: getting resource kind cephbuckettopics
Info: resource cephbuckettopics was not found on the cluster
Info: getting resource kind cephclients
Info: resource cephclients was not found on the cluster
Info: getting resource kind cephcosidrivers
Info: resource cephcosidrivers was not found on the cluster
Info: getting resource kind cephfilesystemmirrors
Info: resource cephfilesystemmirrors was not found on the cluster
Info: getting resource kind cephfilesystems
Info: removing resource cephfilesystems: myfs
Info: resource myfs was deleted
Info: getting resource kind cephfilesystemsubvolumegroups
Info: removing resource cephfilesystemsubvolumegroups: myfs-csi
Info: resource myfs-csi was deleted
Info: getting resource kind cephnfses
Info: resource cephnfses was not found on the cluster
Info: getting resource kind cephobjectrealms
Info: resource cephobjectrealms was not found on the cluster
Info: getting resource kind cephobjectstores
Info: removing resource cephobjectstores: my-store
Info: resource my-store was deleted
Info: getting resource kind cephobjectstoreusers
Info: resource cephobjectstoreusers was not found on the cluster
Info: getting resource kind cephobjectzonegroups
Info: resource cephobjectzonegroups was not found on the cluster
Info: getting resource kind cephobjectzones
Info: resource cephobjectzones was not found on the cluster
Info: getting resource kind cephrbdmirrors
Info: resource cephrbdmirrors was not found on the cluster
Info: removing deployment rook-ceph-tools
Info: waiting to clean up resources
Info: 1 pods still alive, removing....
Info: pod rook-ceph-mds-myfs-b-58cf7bcbb7-d6rc4 still a live
Info: done