Enable docker for CentOS >= 7 and Fedora >= 30

tasks/main.yml

@@ -1,2 +1,87 @@
 ---
 # tasks file for ensure_docker
+- name: 'include variables'
+  when:
+    - ansible_system == 'Linux'
+  include_vars:
+    file: '{{ lookup("first_found", findme ) }}'
+    name: 'ensure_docker'
+  vars:
+    findme:
+      files:
+        - '{{ ansible_distribution }}-{{ ansible_distribution_major_version }}-{{ ansible_architecture }}.yml'
+        - '{{ ansible_distribution }}-{{ ansible_distribution_major_version }}-default.yml'
+        - '{{ ansible_distribution }}-default.yml'
+        - '{{ ansible_os_family }}-{{ ansible_distribution_major_version }}-{{ ansible_architecture }}.yml'
+        - '{{ ansible_os_family }}-{{ ansible_distribution_major_version }}-default.yml'
+        - '{{ ansible_os_family }}-default.yml'
+        - 'default.yml'
+      paths:
+        - '../vars/'
+      errors: 'ignore'
+- name: 'package discovery'
+  when:
+    - ansible_system == 'Linux'
+    - packages is not defined
+  ansible.builtin.package_facts:
+- name: 'service discovery'
+  when:
+    - ansible_system == 'Linux'
+    - services is not defined
+  ansible.builtin.service_facts:
+- name: 'ensure packages'
+  when:
+    - ansible_system == 'Linux'
+    - ensure_docker is defined
+    - ensure_docker.package_list is defined
+    - ensure_docker.package_list is iterable
+    - packages[item.name] is not defined
+  ansible.builtin.package:
+    name: '{{ item.name }}'
+    state: '{{ item.state }}'
+  loop: '{{ ensure_docker.package_list }}'
+  loop_control:
+    label: '{{ item.name }} will be {{ item.state }}'
+  notify:
+    - 'ensure_docker.package_facts'
+    - 'ensure_docker.service_facts'
+- name: 'ensure services'
+  when:
+    - ansible_system == 'Linux'
+    - ensure_docker is defined
+    - ensure_docker.service_list is defined
+    - ensure_docker.service_list is iterable
+  ansible.builtin.service:
+    enabled: '{{ item.enabled }}'
+    name: '{{ item.name }}'
+    state: '{{ item.state }}'
+  loop: '{{ ensure_docker.service_list }}'
+  loop_control:
+    label: '{{ item.name }} will be {{ item.state }}'
+  notify:
+    - 'ensure_docker.package_facts'
+    - 'ensure_docker.service_facts'
+- name: 'Fetch kernel command line'
+  when:
+    - ansible_system = 'Linux'
+    - ensure_docker is defined
+    - ansible_distribution == 'Fedora'
+    - ansible_distribution_major_version is version('32', '>=')
+  shell: |
+    cat /proc/cmdline
+  register: 'results'
+  changed_when: 'false'
+- name: 'Add cgroups v1 if disabled'
+  when:
+    - results is defined
+    - ' "systemd.unified_cgroup_hierarchy=0" not in results.stdout '
+  shell:
+    cmd: |
+      grubby --update-kernel=ALL --args=systemd.unified_cgroup_hierarchy=0
+- name: 'Reboot to enable cgroups v1'
+  when:
+    - results is defined
+    - ' "systemd.unified_cgroup_hierarchy=0" not in results.stdout '
+  reboot:
+- name: 'flush handlers'
+  meta: 'flush_handlers'

vars/CentOS-7.yml

@@ -0,0 +1,11 @@
+---
+# vars file for ensure_docker
+package_list:
+  - name: 'docker-compose'
+    state: 'present'
+  - name: 'moby-engine'
+    state: 'present'
+service_list:
+  - name: 'docker.socket'
+    state: 'started'
+    enabled: 'yes'

vars/CentOS-8.yml

@@ -0,0 +1,11 @@
+---
+# vars file for ensure_docker
+package_list:
+  - name: 'docker-compose'
+    state: 'present'
+  - name: 'moby-engine'
+    state: 'present'
+service_list:
+  - name: 'docker.socket'
+    state: 'started'
+    enabled: 'yes'

vars/Fedora-30.yml

@@ -0,0 +1,13 @@
+---
+# vars file for ensure_docker
+package_list:
+  - name: 'cockpit-docker'
+    state: 'present'
+  - name: 'docker-compose'
+    state: 'present'
+  - name: 'moby-engine'
+    state: 'present'
+service_list:
+  - name: 'docker.socket'
+    state: 'started'
+    enabled: 'yes'

vars/Fedora-31.yml

@@ -0,0 +1,13 @@
+---
+# vars file for ensure_docker
+package_list:
+  - name: 'cockpit-docker'
+    state: 'present'
+  - name: 'docker-compose'
+    state: 'present'
+  - name: 'moby-engine'
+    state: 'present'
+service_list:
+  - name: 'docker.socket'
+    state: 'started'
+    enabled: 'yes'

vars/Fedora-32.yml

@@ -0,0 +1,11 @@
+---
+# vars file for ensure_docker
+package_list:
+  - name: 'docker-compose'
+    state: 'present'
+  - name: 'moby-engine'
+    state: 'present'
+service_list:
+  - name: 'docker.socket'
+    state: 'started'
+    enabled: 'yes'

vars/Fedora-33.yml

@@ -0,0 +1,11 @@
+---
+# vars file for ensure_docker
+package_list:
+  - name: 'docker-compose'
+    state: 'present'
+  - name: 'moby-engine'
+    state: 'present'
+service_list:
+  - name: 'docker.socket'
+    state: 'started'
+    enabled: 'yes'

vars/default.yml

@@ -0,0 +1,2 @@
+---
+# vars file for ensure_docker