portainer: the network creation has its own task

defaults/main.yml

@@ -17,7 +17,7 @@ docker_swarm_portainer_hostname: 'portainer-swarm.example.com'
 docker_swarm_portainer_additional_constraints: []
 #  - 'node.hostname != docker01'
 
-docker_swarm_portainer_network: 'agent_network'
+docker_swarm_portainer_network: 'portainer_agent_network'
 docker_swarm_portainer_http_port: '9000'
 docker_swarm_portainer_service_port: '8000'
 

tasks/portainer.yml

@@ -4,6 +4,12 @@
   - name: Install the portainer docker stack configuration
     template: src=portainer-agent-stack.yml.j2 dest=/srv/portainer-agent-stack.yml owner=root group=root mode='0444'
 
+  - name: Create the overlay network that will be used by portainer
+    docker_network:
+      name: '{{ docker_swarm_portainer_network }}'
+      driver: overlay
+      scope: swarm
+
   - name: Run the docker stack to start portainer
     docker_stack:
       state: present

templates/portainer-agent-stack.yml.j2

@@ -47,10 +47,5 @@ services:
       driver: 'journald'
 {% endif %}
 
-networks:
-  {{ docker_swarm_portainer_network }}:
-    driver: overlay
-    attachable: true
-
 volumes:
   portainer_data: