Chapter 2. Upgrading a host operating system from RHEL 8 to RHEL 9

Procedure

1. Deploy Red Hat Ceph Storage 5.3 on Red Hat Enterprise Linux 8.8 with service.

1. Set the noout flag on the Ceph OSD.

   Example

   [ceph: root@host01 /]# ceph osd set noout

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2. Perform host upgrade one node at a time using the Leapp utility.

   1. Put respective node maintenance mode before performing host upgrade using Leapp.

      Syntax

      ceph orch host maintenance enter HOST

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      Example

      ceph orch host maintenance enter host01

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   2. Enable the ceph tools repo manually when executing the leapp command with the --enablerepo parameter.

      Example

      leapp upgrade --enablerepo rhceph-5-tools-for-rhel-9-x86_64-rpms

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   3. Refer to Upgrading RHEL 8 to RHEL 9 within the Red Hat Enterprise Linux product documentation on the Red Hat Customer Portal.

      Important

      After performing in-place upgrade from Red Hat Enterprise Linux 8 to Red Hat Enterprise Linux 9, you need to manually enable and start the logrotate.timer service.

      # systemctl start logrotate.timer
      # systemctl enable logrotate.timer

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3. Verify the new IMAGE_ID and VERSION of the Ceph cluster:

   Example

   [ceph: root@node0 /]# ceph version
   [ceph: root@node0 /]# ceph orch ps

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4. Continue with the Red Hat Ceph Storage 5.3 to Red Hat Ceph Storage 7 upgrade by following the Upgrading the Red Hat Ceph Storage cluster steps in the Red Hat Ceph Storage Upgrade Guide.