ceph-validate: add rbdmirror validation

When ceph_rbd_mirror_configure is set to true we need to ensure that
the required variables aren't empty.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1760553

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>
(cherry picked from commit 4a065cebd7)

roles/ceph-validate/tasks/check_rbdmirror.yml

@@ -0,0 +1,15 @@
+---
+- name: ensure ceph_rbd_mirror_pool is set
+  fail:
+    msg: "ceph_rbd_mirror_pool needs to be provided"
+  when: ceph_rbd_mirror_pool | default("") | length == 0
+
+- name: ensure ceph_rbd_mirror_remote_cluster is set
+  fail:
+    msg: "ceph_rbd_mirror_remote_cluster needs to be provided"
+  when: ceph_rbd_mirror_remote_cluster | default("") | length == 0
+
+- name: ensure ceph_rbd_mirror_remote_user is set
+  fail:
+    msg: "ceph_rbd_mirror_remote_user needs to be provided"
+  when: ceph_rbd_mirror_remote_user | default("") | length == 0

roles/ceph-validate/tasks/main.yml

@@ -208,3 +208,9 @@
   when:
     - radosgw_frontend_type == 'civetweb'
     - radosgw_civetweb_num_threads is defined
+
+- name: include check_rbdmirror.yml
+  include_tasks: check_rbdmirror.yml
+  when:
+    - rbdmirror_group_name in group_names
+    - ceph_rbd_mirror_configure | default(false) | bool