feat(docker): add ansible role

roles/docker/tasks/configure.yml

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+---
+- name: Ensure config directory '{{ docker_daemon_config_file | dirname }}' is present
+  ansible.builtin.file:
+    path: "{{ docker_daemon_config_file | dirname }}"
+    state: "directory"
+    mode: "0755"
+    owner: "{{ docker_daemon_config_owner }}"
+    group: "{{ docker_daemon_config_group }}"
+
+- name: Configure docker daemon using '{{ docker_daemon_config_file }}'
+  ansible.builtin.copy:
+    content: "{{ docker_daemon_config | to_json }}"
+    dest: "{{ docker_daemon_config_file }}"
+    mode: "{{ docker_daemon_config_file_mode }}"
+    owner: "{{ docker_daemon_config_owner }}"
+    group: "{{ docker_daemon_config_group }}"
+  when: docker_daemon_config | string | length > 0
+  notify: docker-restart

roles/docker/tasks/install-debian.yml

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+---
+- name: Ensure legacy docker packages are removed
+  ansible.builtin.apt:
+    name: "{{ docker_apt_legacy_packages }}"
+    state: absent
+  when: docker_remove_legacy_packages
+
+- name: Add apt key for docker repository
+  ansible.builtin.apt_key:
+    id: "{{ docker_apt_key_id }}"
+    url: "{{ docker_apt_key_url }}"
+    state: "{{ docker_state }}"
+
+- name: Add apt repository for docker
+  ansible.builtin.apt_repository:
+    repo: "{{ docker_apt_repository }}"
+    state: "{{ docker_state }}"
+  register: docker_apt_repository_info
+
+- name: Update apt cache if repository was newly added
+  ansible.builtin.apt:
+    update_cache: true
+  when:
+    - docker_state == 'present'
+    - docker_apt_repository_info.changed
+
+- name: Install apt packages for docker
+  ansible.builtin.apt:
+    name: "{{ docker_apt_packages }}"
+    state: "{{ docker_state }}"

roles/docker/tasks/main.yml

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+---
+- name: Check if target OS is supported
+  ansible.builtin.fail:
+    msg: >-2
+      OS Family '{{ docker_os_family }}' is not supported!
+  when: docker_os_family not in docker_supported_os_families
+  vars:
+    docker_os_family: "{{ ansible_os_family | lower }}"
+
+- name: Ensure docker is {{ docker_state }} on {{ ansible_os_family }}-family
+  ansible.builtin.include_tasks:
+    file: "install-{{ ansible_os_family | lower }}.yml"
+
+- name: Configure docker daemon
+  ansible.builtin.include_tasks:
+    file: "configure.yml"
+  when: docker_state == 'present'
+
+- name: Ensure docker daemon is {{ docker_systemd_service_enabled | ternary('enabled', 'disabled') }}
+  ansible.builtin.systemd_service:
+    name: "{{ docker_systemd_service_name }}"
+    enabled: "{{ docker_systemd_service_enabled }}"
+  when: ansible_facts['service_mgr'] == 'systemd'
+
+- name: Ensure docker daemon is {{ docker_systemd_service_state }}
+  ansible.builtin.systemd_service:
+    name: "{{ docker_systemd_service_name }}"
+    state: "{{ docker_systemd_service_state }}"
+  when: ansible_facts['service_mgr'] == 'systemd'