filestore-to-bluestore: skip bluestore osd nodes

If the OSD node is already using bluestore OSDs then we should skip
all the remaining tasks to avoid purging OSD for nothing.
Instead we warn the user.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1790472

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>
(cherry picked from commit 83c5a1d7a8)

infrastructure-playbooks/filestore-to-bluestore.yml

@@ -21,6 +21,18 @@
     - import_role:
         name: ceph-defaults
 
+    - name: set_fact current_objectstore
+      set_fact:
+        current_objectstore: '{{ osd_objectstore }}'
+
+    - name: warn user about osd already using bluestore
+      debug:
+        msg: 'WARNING: {{ inventory_hostname }} is already using bluestore. Skipping all tasks.'
+      when: current_objectstore == 'bluestore'
+
+    - name: shrink and redeploy filestore osds
+      when: current_objectstore == 'filestore'
+      block:
         - import_role:
             name: ceph-facts
 
@@ -246,6 +258,10 @@
             filter: ansible_devices
           when: osd_auto_discovery | bool
 
+        - name: force osd_objectstore to bluestore
+          set_fact:
+            osd_objectstore: bluestore
+
         - import_role:
             name: ceph-defaults
         - import_role:
@@ -257,9 +273,5 @@
           when: containerized_deployment | bool
         - import_role:
             name: ceph-config
-      vars:
-        osd_objectstore: bluestore
         - import_role:
             name: ceph-osd
-      vars:
-        osd_objectstore: bluestore