master Add docker running task and add check on running status test

.travis.yml

@@ -1,14 +1,22 @@
 ---
 language: python
+
 services:
   - docker
+
 python:
   - "3.7"
+
 env:
-  - UBUNTU_IMAGE_TAG: bionic
+  - MOLECULE_DISTRO: ubuntu2004
+  - MOLECULE_DISTRO: ubuntu1804
+  - MOLECULE_DISTRO: ubuntu1604
+
 install:
   - pip install testinfra molecule docker
+
 script:
   - molecule test
+
 notifications:
   webhooks: https://galaxy.ansible.com/api/v1/notifications/

README.md

@@ -12,7 +12,9 @@ N/A
 
 * `docker_gpg_key`: GPG key for Docker repository
 * `docker_ubuntu_release`: Version of Ubuntu release
-* `docker_users`: a list of users to add to the docker group. They will not be evaluated until a session is created.
+* `docker_users`: A list of users to add to the docker group. They will not be evaluated until a session is created.
+* `docker_service_state`: Docker service state
+* `docker_service_enabled`: Docker service enable status
 
 ## Dependencies
 

defaults/main.yml

@@ -2,6 +2,8 @@
 
 docker_gpg_key: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
 docker_ubuntu_release: bionic
+docker_service_state: started
+docker_service_enabled: true
 
 docker_users:
   - root

molecule/default/converge.yml

@@ -1,6 +1,27 @@
 ---
 - name: Converge
   hosts: all
+  become: true
+
+  pre_tasks:
+    - name: Update apt cache
+      apt:
+        update_cache: true
+        cache_valid_time: 600
+      changed_when: false
+
+    - name: Wait for systemd to complete initialization
+      command: systemctl is-system-running
+      register: systemctl_status
+      until: >
+        'running' in systemctl_status.stdout or
+        'degraded' in systemctl_status.stdout
+      retries: 30
+      delay: 5
+      when: ansible_service_mgr == 'systemd'
+      changed_when: false
+      failed_when: systemctl_status.rc > 1
+
   tasks:
     - name: "Include ansible-docker"
       include_role:

molecule/default/molecule.yml

@@ -5,7 +5,11 @@ driver:
   name: docker
 platforms:
   - name: instance
-    image: docker.io/pycontribs/ubuntu:latest
+    image: "geerlingguy/docker-${MOLECULE_DISTRO:-ubuntu2004}-ansible:latest"
+    command: ${MOLECULE_DOCKER_COMMAND:-""}
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:ro
+    privileged: true
     pre_build_image: true
 provisioner:
   name: ansible

molecule/default/tests/test_default.py

@@ -16,4 +16,10 @@ def test_hosts_file(host):
 def test_docker_is_installed(host):
     docker = host.package("docker-ce")
 
-    assert docker.is_installed
+    assert docker.is_installed
+
+def test_docker_is_enabled_and_is_running(host):
+    service = host.service("docker")
+
+    assert service.is_running
+    assert service.is_enabled

tasks/main.yml

@@ -47,14 +47,17 @@
       - docker-ce-cli
       - containerd.io
     state: present
-  register: result
-  until: result is success
-  retries: 5
-  delay: 5
+
+- name: Ensure Docker is started and enabled at boot.
+  service:
+    name: docker
+    state: "{{ docker_service_state }}"
+    enabled: "{{ docker_service_enabled }}"
 
 - name: Add user to Docker group
   user:
     name: "{{ item }}"
     groups: docker
     append: true
-  loop: "{{ docker_users }}"
+  with_items: "{{ docker_users }}"
+  when: docker_users| length > 0