cephadm-adopt: delegate task for orch apply

This is a partial revert of b38019e because we don't want to execute
the whole play on the monitor otherwise if we have some empty group
like rgws or mdss then the orchestrator commands will still be
executed.
Instead we should keep the real target group name at play level and
delegate the orchestator commands to the monitor. The whole play
will be skipped is the group is empty.

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>

infrastructure-playbooks/cephadm-adopt.yml

@@ -392,7 +392,7 @@
       when: not containerized_deployment | bool
 
 - name: set osd flags
-  hosts: "{{ mon_group_name|default('mons') }}"
+  hosts: "{{ mon_group_name|default('mons') }}[0]"
   become: true
   gather_facts: false
   tasks:
@@ -401,7 +401,6 @@
 
     - name: set osd flags
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} osd set {{ item }}"
-      run_once: true
       changed_when: false
       with_items:
         - noout
@@ -490,7 +489,7 @@
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
 - name: unset osd flags
-  hosts: "{{ mon_group_name|default('mons') }}"
+  hosts: "{{ mon_group_name|default('mons') }}[0]"
   become: true
   gather_facts: false
   tasks:
@@ -499,7 +498,6 @@
 
     - name: unset osd flags
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} osd unset {{ item }}"
-      run_once: true
       changed_when: false
       with_items:
         - noout
@@ -508,7 +506,7 @@
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
 - name: redeploy mds daemons
-  hosts: "{{ mon_group_name|default('mons') }}"
+  hosts: "{{ mds_group_name|default('mdss') }}"
   become: true
   gather_facts: false
   tasks:
@@ -519,6 +517,7 @@
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply mds {{ cephfs }} --placement='{{ groups.get(mds_group_name, []) | length }} label:{{ mds_group_name }}'"
       run_once: true
       changed_when: false
+      delegate_to: "{{ groups[mon_group_name][0] }}"
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
@@ -568,7 +567,7 @@
         state: absent
 
 - name: rgw realm/zonegroup/zone requirements
-  hosts: "{{ mon_group_name|default('mons') }}"
+  hosts: "{{ rgw_group_name|default('rgws') }}"
   become: true
   gather_facts: false
   tasks:
@@ -578,6 +577,7 @@
     - name: for non multisite setup
       when: not rgw_multisite | bool
       run_once: true
+      delegate_to: "{{ groups[mon_group_name][0] }}"
       block:
         - name: create a default realm
           command: "cephadm shell --fsid {{ fsid }} -- radosgw-admin --cluster {{ cluster }} realm create --rgw-realm=default --default"
@@ -608,9 +608,10 @@
             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') }} --placement='{{ groups.get(rgw_group_name, []) | length }} label:{{ rgw_group_name }}' --port {{ radosgw_frontend_port }} {{ '--ssl' if radosgw_frontend_ssl_certificate else '' }}"
+      command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply rgw {{ rgw_realm | default('default') }} {{ rgw_zone | default('default') }} --placement='{{ 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
+      delegate_to: "{{ groups[mon_group_name][0] }}"
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
@@ -672,7 +673,7 @@
         state: absent
 
 - name: redeploy rbd-mirror daemons
-  hosts: "{{ mon_group_name|default('mons') }}"
+  hosts: "{{ rbdmirror_group_name|default('rbdmirrors') }}"
   become: true
   gather_facts: false
   tasks:
@@ -683,6 +684,7 @@
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply rbd-mirror --placement='{{ groups.get(rbdmirror_group_name, []) | length }} label:{{ rbdmirror_group_name }}'"
       run_once: true
       changed_when: false
+      delegate_to: "{{ groups[mon_group_name][0] }}"
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
@@ -807,6 +809,7 @@
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply crash --placement='label:ceph'"
       run_once: true
       changed_when: false
+      delegate_to: '{{ groups[mon_group_name][0] }}'
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
@@ -979,11 +982,12 @@
           command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply node-exporter --placement='*'"
           run_once: true
           changed_when: false
+          delegate_to: '{{ groups[mon_group_name][0] }}'
           environment:
             CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
 - name: adjust placement daemons
-  hosts: "{{ mon_group_name|default('mons') }}"
+  hosts: "{{ mon_group_name|default('mons') }}[0]"
   become: true
   gather_facts: false
   tasks:
@@ -992,14 +996,12 @@
 
     - name: update the placement of monitor hosts
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply mon --placement='{{ groups.get(mon_group_name, []) | length }} label:{{ mon_group_name }}'"
-      run_once: true
       changed_when: false
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
     - name: update the placement of manager hosts
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply mgr --placement='{{ groups.get(mgr_group_name, []) | length }} label:{{ mgr_group_name }}'"
-      run_once: true
       changed_when: false
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
@@ -1009,27 +1011,24 @@
       block:
         - name: update the placement of alertmanager hosts
           command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply alertmanager --placement='{{ groups.get(grafana_server_group_name, []) | length }} label:{{ grafana_server_group_name }}'"
-          run_once: true
           changed_when: false
           environment:
             CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
         - name: update the placement of grafana hosts
           command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply grafana --placement='{{ groups.get(grafana_server_group_name, []) | length }} label:{{ grafana_server_group_name }}'"
-          run_once: true
           changed_when: false
           environment:
             CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
         - name: update the placement of prometheus hosts
           command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch apply prometheus --placement='{{ groups.get(grafana_server_group_name, []) | length }} label:{{ grafana_server_group_name }}'"
-          run_once: true
           changed_when: false
           environment:
             CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
 - name: show ceph orchestrator status
-  hosts: "{{ mon_group_name|default('mons') }}"
+  hosts: "{{ mon_group_name|default('mons') }}[0]"
   become: true
   gather_facts: false
   tasks:
@@ -1038,14 +1037,12 @@
 
     - name: show ceph orchestrator services
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch ls --refresh"
-      run_once: true
       changed_when: false
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'
 
     - name: show ceph orchestrator daemons
       command: "cephadm shell --fsid {{ fsid }} -- ceph --cluster {{ cluster }} orch ps --refresh"
-      run_once: true
       changed_when: false
       environment:
         CEPHADM_IMAGE: '{{ ceph_docker_registry }}/{{ ceph_docker_image }}:{{ ceph_docker_image_tag }}'