Retry pgsql bootstrap startup 6 times

This will sometimes fail, so retry it several times

roles/pvc/tasks/patroni/bootstrap.yml

@@ -11,7 +11,7 @@
   command: /usr/share/zookeeper/bin/zkCli.sh rmr /patroni
   ignore_errors: true
 
-- name: ensure patroni services are enabled and started on this host so it becomes leader
+- name: ensure patroni services are enabled and started
   service:
     name: "{{ item }}.service"
     state: started
@@ -23,6 +23,13 @@
   pause:
     seconds: 15
 
+- name: test connecting to cluster
+  shell: sudo -u postgres psql postgres -c 'select * from pg_stat_activity' || ( service patroni restart && exit 1 )
+  register: result
+  retries: 6
+  delay: 5
+  until: result.rc == 0
+
 - block:
     - name: create user for DNS role
       postgresql_user: