monitor: use quorum_status instead of ceph status

The ceph status command returns a lot of information stored in variables
and/or facts which could consume resources for nothing.
When checking the quorum status, we're only using the quorum_names
structure in the ceph status output.
To optimize this, we could use the ceph quorum_status command which contains
the same needed information.
This command returns less information.

$ ceph status -f json  | wc -c
2001
$ ceph quorum_status -f json  | wc -c
957
$ time ceph status -f json > /dev/null

real	0m0.577s
user	0m0.538s
sys	0m0.029s
$ time ceph quorum_status -f json > /dev/null

real	0m0.544s
user	0m0.527s
sys	0m0.016s

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>
(cherry picked from commit 88f91d8c12)

infrastructure-playbooks/rolling_update.yml

@@ -233,7 +233,7 @@
       ignore_errors: True # if no mgr collocated with mons
 
     - name: non container | waiting for the monitor to join the quorum...
-      command: ceph --cluster "{{ cluster }}" -m "{{ hostvars[groups[mon_group_name][0]]['_current_monitor_address'] }}" -s --format json
+      command: ceph --cluster "{{ cluster }}" -m "{{ hostvars[groups[mon_group_name][0]]['_current_monitor_address'] }}" quorum_status --format json
       register: ceph_health_raw
       until:
         - ceph_health_raw.rc == 0
@@ -245,7 +245,7 @@
 
     - name: container | waiting for the containerized monitor to join the quorum...
       command: >
-        {{ container_binary }} exec ceph-mon-{{ ansible_hostname }} ceph --cluster "{{ cluster }}" -m "{{ hostvars[groups[mon_group_name][0]]['_current_monitor_address'] }}" -s --format json
+        {{ container_binary }} exec ceph-mon-{{ ansible_hostname }} ceph --cluster "{{ cluster }}" -m "{{ hostvars[groups[mon_group_name][0]]['_current_monitor_address'] }}" quorum_status --format json
       register: ceph_health_raw
       until:
         - ceph_health_raw.rc == 0

infrastructure-playbooks/shrink-mon.yml

@@ -112,7 +112,7 @@
 
   post_tasks:
     - name: verify the monitor is out of the cluster
-      command: "{{ container_exec_cmd }} ceph --cluster {{ cluster }} -s -f json"
+      command: "{{ container_exec_cmd }} ceph --cluster {{ cluster }} quorum_status -f json"
       delegate_to: "{{ mon_host }}"
       failed_when: false
       register: result

infrastructure-playbooks/switch-from-non-containerized-to-containerized-ceph-daemons.yml

@@ -135,7 +135,7 @@
 
   post_tasks:
     - name: waiting for the monitor to join the quorum...
-      command: "{{ container_exec_cmd }} ceph --cluster {{ cluster }} -s --format json"
+      command: "{{ container_exec_cmd }} ceph --cluster {{ cluster }} quorum_status --format json"
       register: ceph_health_raw
       until: >
         hostvars[mon_host]['ansible_hostname'] in (ceph_health_raw.stdout | from_json)["quorum_names"]

roles/ceph-handler/templates/restart_mon_daemon.sh.j2

@@ -19,7 +19,7 @@ $DOCKER_EXEC test -S /var/run/ceph/{{ cluster }}-mon.{{ ansible_hostname }}.asok
 
 check_quorum() {
 while [ $RETRIES -ne 0 ]; do
-  $DOCKER_EXEC ceph --cluster {{ cluster }} -s --format json | "{{ discovered_interpreter_python }}" -c 'import sys, json; exit(0) if "{{ monitor_name }}" in json.load(sys.stdin)["quorum_names"] else exit(1)' && exit 0
+  $DOCKER_EXEC ceph --cluster {{ cluster }} quorum_status --format json | "{{ discovered_interpreter_python }}" -c 'import sys, json; exit(0) if "{{ monitor_name }}" in json.load(sys.stdin)["quorum_names"] else exit(1)' && exit 0
   sleep $DELAY
   let RETRIES=RETRIES-1
 done