Removing hosts

To remove a host from a Ceph cluster, you can use Start Drain and Remove options in IBM Storage Ceph Dashboard.

Before you begin

Before you begin, make sure that you have the following prerequisites in place:

  • A running IBM Storage Ceph cluster.

  • Dashboard is installed.

  • All other prerequisite checks are performed internally by Ceph and any probable errors are taken care of internally by Ceph.

Procedure

  1. From the dashboard navigation, go to Cluster > Hosts.
  2. Select the host that is to be removed, and click Start Drain from the action drop-down.
    This option drains all the daemons from the host.
    Note: The _no_schedule label is automatically applied to the host, which blocks the deployment of daemons on this host.
    1. Optional: To stop the draining of daemons from the host, click Stop Drain option from the action drop-down menu.
  3. Check that all the daemons are removed from the host.
    1. Expand the host row.
    2. Go to the Daemons tab.
      No daemons should be listed.
  4. Select the host that is to be removed, and click Remove from the action drop-down.
  5. In the Remove Host dialog, select Yes, I am sure and click Remove Host.
    A notification displays that the host is removed successfully.