cephadm-adopt: run orch apply from monitors

It looks like we can't run the ceph orch apply commands on nodes other
than monitors even if it used to work in the past.
Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>

infrastructure-playbooks/cephadm-adopt.yml

@@ -417,7 +417,7 @@
       when: not containerized_deployment | bool
 
 - name: redeploy mds daemons
-  hosts: "{{ mds_group_name|default('mdss') }}"
+  hosts: "{{ mon_group_name|default('mons') }}"
   become: true
   gather_facts: false
   tasks:
@@ -477,7 +477,7 @@
         state: absent
 
 - name: rgw realm/zonegroup/zone requirements
-  hosts: "{{ rgw_group_name|default('rgws') }}"
+  hosts: "{{ mon_group_name|default('mons') }}"
   become: true
   gather_facts: false
   tasks:
@@ -516,6 +516,13 @@
           environment:
             CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
+    - name: update the placement of radosgw hosts
+      command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply rgw {{ rgw_realm | default('default') }} {{ rgw_zone | default('default') }} '{{ groups.get(rgw_group_name, []) | length }} label:{{ rgw_group_name }}' --port {{ radosgw_frontend_port }} {{ '--ssl' if radosgw_frontend_ssl_certificate else '' }}"
+      run_once: true
+      changed_when: false
+      environment:
+        CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
+
 - name: redeploy rgw daemons
   hosts: "{{ rgw_group_name|default('rgws') }}"
   serial: 1
@@ -529,13 +536,6 @@
         name: ceph-facts
         tasks_from: set_radosgw_address.yml
 
-    - name: update the placement of radosgw hosts
-      command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply rgw {{ item.rgw_realm | default('default') }} {{ item.rgw_zone | default('default') }} 1 {{ ansible_hostname }} --port {{ item.radosgw_frontend_port }} {{ '--ssl' if radosgw_frontend_ssl_certificate else '' }}"
-      changed_when: false
-      loop: '{{ rgw_instances }}'
-      environment:
-        CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
-
     - name: stop and disable ceph-radosgw systemd service
       service:
         name: 'ceph-radosgw@rgw.{{ ansible_hostname }}.{{ item.instance_name }}'
@@ -581,7 +581,7 @@
         state: absent
 
 - name: redeploy rbd-mirror daemons
-  hosts: "{{ rbdmirror_group_name|default('rbdmirrors') }}"
+  hosts: "{{ mon_group_name|default('mons') }}"
   become: true
   gather_facts: false
   tasks: