7.3. Removing a host from the Ceph cluster

Procedure

1. Log in to the Cephadm shell:

   [root@host01 ~]# cephadm shell

2. Fetch the host details:

   [ceph: root@host01 /]# ceph orch host ls

3. Drain all the daemons from the host:

   [ceph: root@host01 /]# ceph orch host drain <hostname>

   • Replace <hostname> with the name of the host that you are removing.

     For more information about managing Red Hat Ceph Storage services, see the Administration Guide for your Red Hat Ceph Storage version:

     • Red Hat Ceph Storage 7 Administration Guide
     • Red Hat Ceph Storage 8 Administration Guide
     • Red Hat Ceph Storage 9 Administration Guide

4. Check the status of OSD removal:

   [ceph: root@host01 /]# ceph orch osd rm status

   When no placement groups (PG) are left on the OSD, the OSD is decommissioned and removed from the storage cluster.

5. Check if all the daemons are removed from the storage cluster:

   [ceph: root@host01 /]# ceph orch ps <hostname>

   • Replace <hostname> with the name of the host that you are removing.

6. Remove the host:

   [ceph: root@host01 /]# ceph orch host rm <hostname>

   • Replace <hostname> with the name of the host that you are removing.