osd: fix monitor_name error when scaling out OSDs

This commit fixes a bug when trying to scale out osd nodes with
`crush_rule_config` is enabled.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1822599

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 4bcc52cb2a)

roles/ceph-facts/tasks/facts.yml

@@ -30,13 +30,25 @@
 
 - name: set_fact monitor_name ansible_hostname
   set_fact:
-    monitor_name: "{{ ansible_hostname }}"
+    monitor_name: "{{ hostvars[item]['ansible_hostname'] }}"
-  when: not mon_use_fqdn | bool
+  delegate_to: "{{ item }}"
+  delegate_facts: true
+  with_items: "{{ groups.get(mon_group_name, []) }}"
+  run_once: true
+  when:
+    - groups.get(mon_group_name, []) | length > 0
+    - not mon_use_fqdn | bool
 
 - name: set_fact monitor_name ansible_fqdn
   set_fact:
-    monitor_name: "{{ ansible_fqdn }}"
+    monitor_name: "{{ hostvars[item]['ansible_fqdn'] }}"
-  when: mon_use_fqdn | bool
+  delegate_to: "{{ item }}"
+  delegate_facts: true
+  with_items: "{{ groups.get(mon_group_name, []) }}"
+  run_once: true
+  when:
+    - groups.get(mon_group_name, []) | length > 0
+    - mon_use_fqdn | bool
 
 - name: find a running monitor
   when: groups.get(mon_group_name, []) | length > 0