Introduce delay option for clusters not to reload at the same time

Signed-off-by: Knut Ahlers <knut@ahlers.me>

defaults/main.yml

@@ -3,6 +3,7 @@
 docker_compose_reload_minutes: 15
 docker_compose_stop_action: down
 docker_compose_validate: true
+docker_compose_reload_max_delay: 0 # Have no delay, should be less than docker_compose_reload_minutes
 
 docker_compose_config:
   version: "3"

tasks/main.yml

@@ -118,6 +118,7 @@
 
       [Timer]
       OnCalendar=*:0/{{ docker_compose_reload_minutes }}
+      RandomizedDelaySec={{ docker_compose_reload_max_delay }}
 
       [Install]
       WantedBy=timers.target