Activating the OSDs

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You can activate the OSDs in the cluster in cases where the operating system of the host was reinstalled.

Prerequisites

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  • A running IBM Storage Ceph cluster.

  • Hosts are added to the cluster.

  • Monitor, Manager and OSD daemons are deployed on the storage cluster.

Procedure

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  1. Log into the Cephadm shell:

    Example 

    [root@host01 ~]# cephadm shell

  2. After the operating system of the host is reinstalled, activate the OSDs:

    Syntax 

    ceph cephadm osd activate HOSTNAME

    Example 

    [ceph: root@host01 /]# ceph cephadm osd activate host03

Verification

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  • List the service:

    Example 

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

  • List the hosts, daemons, and processes:

    Syntax 

    ceph orch ps --service_name=SERVICE_NAME

    Example 

    [ceph: root@host01 /]# ceph orch ps --service_name=osd