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Chapter 6. Removing OSDs using the OpenShift Data Foundation CLI tool

You can use the OpenShift Data Foundation command line interface (CLI) tool to automate the process of object storage device (OSD) removal. This helps to avoid the possible data loss while removing OSDs.

Prerequisites

  • Download the OpenShift Data Foundation command line interface (CLI) tool. With the Data Foundation CLI tool, you can effectively manage and troubleshoot your Data Foundation environment from a terminal. You can find a compatible version and download the CLI tool from the customer portal.

Procedure

  1. Identify the OSD that needs to be removed. The OSD that needs removal is in CrashLoopBackOff or Error state. 

    $ oc get -n openshift-storage pods -l app=rook-ceph-osd -o wide
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    Example output: 

    rook-ceph-osd-0-6d77d6c7c6-m8xj6    0/1    CrashLoopBackOff    0    24h   10.129.0.16   compute-2   <none>           <none>
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  2. Run the following command to remove OSD 0: 

    $ odf purge-osd 0
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  3. [Optional] If removal of the OSD affects placement group (PG) status, enter yes-force-destroy-osd.
  4. Verify that the last line of the command output contains cephosd: completed removal of OSD 0.

  5. Verify the corresponding deployment is removed: 

    $ oc get deployment rook-ceph-osd-0
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