community.general/test/integration/targets/docker_network/tasks/tests/overlay.yml

---
- name: Registering network name
  set_fact:
    nname_1: "{{ name_prefix ~ '-network-1' }}"
- name: Registering network name
  set_fact:
    dnetworks: "{{ dnetworks }} + [nname_1]"

####################################################################
## overlay #########################################################
####################################################################

# Overlay networks require swarm initialization before they'll work
- name: swarm
  docker_swarm:
    state: present
    advertise_addr: 192.168.1.1

- name: overlay
  docker_network:
    name: "{{ nname_1 }}"
    driver: overlay
    driver_options:
      com.docker.network.driver.overlay.vxlanid_list: "257"
  register: overlay_1

- name: overlay (idempotency)
  docker_network:
    name: "{{ nname_1 }}"
    driver: overlay
    driver_options:
      com.docker.network.driver.overlay.vxlanid_list: "257"
  register: overlay_2

- name: overlay (change)
  docker_network:
    name: "{{ nname_1 }}"
    driver: bridge
  register: overlay_3

- name: cleanup network
  docker_network:
    name: "{{ nname_1 }}"
    state: absent
    force: yes

- name: cleanup swarm
  docker_swarm:
    state: absent
    force: yes

- assert:
    that:
    - overlay_1 is changed
    - overlay_2 is not changed
    - overlay_3 is changed