docker_swarm_service: Add stop_signal option (#52424)

* Add stop_signal option

* Add changelog fragment

test/integration/targets/docker_swarm_service/tasks/tests/options.yml

@@ -1390,6 +1390,46 @@
       - networks_3 is changed
       - networks_4 is not changed
 
+####################################################################
+## stop_signal #####################################################
+####################################################################
+
+- name: stop_signal
+  docker_swarm_service:
+    name: "{{ service_name }}"
+    image: alpine:3.8
+    command: '/bin/sh -v -c "sleep 10m"'
+    stop_signal: 30
+  register: stop_signal_1
+
+- name: stop_signal (idempotency)
+  docker_swarm_service:
+    name: "{{ service_name }}"
+    image: alpine:3.8
+    command: '/bin/sh -v -c "sleep 10m"'
+    stop_signal: 30
+  register: stop_signal_2
+
+- name: stop_signal (change)
+  docker_swarm_service:
+    name: "{{ service_name }}"
+    image: alpine:3.8
+    command: '/bin/sh -v -c "sleep 10m"'
+    stop_signal: 9
+  register: stop_signal_3
+
+- name: cleanup
+  docker_swarm_service:
+    name: "{{ service_name }}"
+    state: absent
+  diff: no
+
+- assert:
+    that:
+    - stop_signal_1 is changed
+    - stop_signal_2 is not changed
+    - stop_signal_3 is changed
+
 ####################################################################
 ## placement_preferences ###########################################
 ####################################################################

test/integration/targets/docker_swarm_service/vars/main.yml

@@ -22,6 +22,7 @@ service_expected_output:
   mode: global
   mounts: null
   networks: null
+  stop_signal: null
   placement_preferences: null
   publish:
     - {mode: null, protocol: tcp, published_port: 60001, target_port: 60001}