Chapter 5. Migrating a non-containerized Red Hat Ceph Storage cluster to a containerized environment

Procedure

1. Edit the group_vars/all.yml file to include configuration for containers:

   Copy to Clipboard Toggle word wrap

   ceph_docker_image_tag: "latest"
   ceph_docker_image: rhceph/rhceph-4-rhel8
   containerized_deployment: true
   ceph_docker_registry: registry.redhat.io

   Important

   For the ceph_docker_image_tag, use latest if your current storage cluster is on latest version or use the appropriate image tag. See the What are the Red Hat Ceph Storage releases and corresponding Ceph package versions? for more information.

2. Navigate to the /usr/share/ceph-ansible directory:

   Copy to Clipboard Toggle word wrap

   [ansible@admin ~]$ cd /usr/share/ceph-ansible

3. On the Ansible administration node, run the Ansible migration playbook:

   Syntax

   Copy to Clipboard Toggle word wrap

   ansible-playbook ./infrastructure-playbooks/switch-from-non-containerized-to-containerized-ceph-daemons.yml -i INVENTORY_FILE

   Example

   Copy to Clipboard Toggle word wrap

   [ansible@admin ceph-ansible]$ ansible-playbook ./infrastructure-playbooks/switch-from-non-containerized-to-containerized-ceph-daemons.yml -i hosts

   Verify the cluster is switched to containerized environment.

4. On the monitor node, list all running containers:

   Red Hat Enterprise Linux 7

   Copy to Clipboard Toggle word wrap

   [root@mon ~]$ sudo docker ps

   Red Hat Enterprise Linux 8

   Copy to Clipboard Toggle word wrap

   [root@mon ~]$ sudo podman ps