Purging the Ceph storage cluster

Purging the Ceph storage cluster clears any data or connections that remain from previous deployments on your server.

Before you begin

Before you begin, be sure that you have a running IBM Storage Ceph.

About this task

For Red Hat Enterprise Linux 9, use the cephadm rm-cluster command, since Ansible is not supported.

Procedure

  1. Disable cephadm to stop all the orchestration operations to avoid deploying new daemons. 
    ceph mgr module disable cephadm
    For example, 
    [ceph: root#host01 /]# ceph mgr module disable cephadm
  2. Get the FSID of the cluster. 
    ceph fsid
    For example, 
    [ceph: root#host01 /]# ceph fsid
  3. Exit the cephadm shell.
    For example, 
    [ceph: root@host01 /]# exit
  4. Purge the Ceph daemons from all hosts in the cluster. 
    cephadm rm-cluster --force --zap-osds --fsid FSID
    For example, 
    [root@host01 ~]# cephadm rm-cluster --force --zap-osds  --fsid 2d2fd136-6df1-11ea-ae74-002590e526e8