Uninstall Rook Ceph

About this task

To completely remove Rook Ceph you must remove the app and clear all the environment configurations to prevent an automatic reinstall.

Procedure

1. Remove the application by running the script:

   source /etc/platform/openrc
   system application-remove rook-ceph --force
   retry_count=1
   retries=200
   while [ $retry_count -le $retries ]; do
       rookstatus=$(system application-list | grep rook-ceph | awk '{print $10}')
       echo $rookstatus
       if [[ "$rookstatus" == "uploaded" ]]; then
           system application-delete rook-ceph --force
           break
       fi
       echo "Retry #" $retry_count
       let retry_count++
   done
   

2. Remove the environment configurations completely.

   1. Remove OSDs.

      1. Lock the host.

         ~(keystone_admin)$ system host-lock <hostname>
         

      2. List all OSDs to get the uuid of each OSD.

         ~(keystone_admin)$ system host-stor-list <hostname>
         

      3. Remove each OSD using the uuid of all OSDs.

         ~(keystone_admin)$ system host-stor-delete <uuid>
         

   2. Remove the storage backend ceph-rook.

      ~(keystone_admin)$ system storage-backend-delete ceph-rook-store --force
      

   3. Remove host-fs.

      1. Check host-fs status.

         ~(keystone_admin)$ system host-fs-list <hostname>
         

      2. To remove a host-fs, the filesystem needs to be in Ready state. To release an In-Use host-fs, remove all functions from it and reapply the application:

         ~(keystone_admin)$ system host-fs-modify <hostname> ceph --functions=
         ~(keystone_admin)$ system appliction-apply rook-ceph
         

      3. When the host-fs is in Ready state, remove the host-fs:

         ~(keystone_admin)$ system host-fs-delete <hostname> ceph
         

   4. (AIO-DX Only) Remove controller-fs.

      1. Check controller-fs status.

         ~(keystone_admin)$ system controller-fs-list
         

      2. To remove a controller-fs, the standby controller must be locked and the controller-fs needs to be in Ready state.

         ~(keystone_admin)$ system host-lock <hostname>
         

      3. To release an In-Use controller-fs, remove all functions from it and reapply the application.

         ~(keystone_admin)$ system controllerfs-modify ceph-float --functions=
         ~(keystone_admin)$ system appliction-apply rook-ceph
         

      4. When the controller-fs is in Ready state, remove the host-fs.

         ~(keystone_admin)$ system controller-fs-delete ceph-float