Create a overlay network as external, attach to that one

tasks/haproxy-docker-service.yml

@@ -17,6 +17,12 @@
   - name: Install the docker compose file
     template: src=haproxy-docker-stack.yml.j2 dest={{ haproxy_docker_compose_dir }}/docker-haproxy-stack.yml mode='0644'
 
+  - name: Create the overlay network that will be joined by the proxied services
+    docker_network:
+      name: '{{ haproxy_docker_overlay_network }}'
+      driver: overlay
+      scope: swarm
+
   - name: Run the docker compose file to start the service
     docker_stack:
       name: haproxy

templates/haproxy-docker-stack.yml.j2

@@ -7,6 +7,8 @@ services:
       - {{ haproxy_cert_dir }}:{{ haproxy_cert_dir }}:ro
       - /etc/haproxy:/usr/local/etc/haproxy:ro
       - /var/run/docker.sock:/var/run/docker.sock
+    networks:
+      - {{ haproxy_docker_overlay_network }}
     ports:
       - target: {{ haproxy_default_port }}
         published: {{ haproxy_default_port }}
@@ -75,3 +77,7 @@ services:
     logging:
       driver: 'journald'
 {% endif %}
+
+networks:
+  {{ haproxy_docker_overlay_network }}: 
+    esternal: True

vars/main.yml

@@ -1,2 +1,2 @@
 ---
-# vars file for ansible-role-template
+haproxy_docker_overlay_network: 'haproxy-public'