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

Procedure

1. Deploy the latest Red Hat Ceph Storage 6.1 or 7.1 cluster 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-8-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 latest Red Hat Ceph Storage 6.1 or 7.1 to Red Hat Ceph Storage 8 upgrade by following the steps listed in Upgrade a Red Hat Ceph Storage cluster using `cephadm`.