add docker_ubuntu role

roles/docker_ubuntu/README.md

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+docker_ubuntu
+=========
+
+Install Docker ecosystem on Ubuntu.
+
+[![lint](https://github.com/corvus-migratorius/ansible-docker-ubuntu/actions/workflows/lint.yaml/badge.svg)](https://github.com/corvus-migratorius/ansible-docker-ubuntu/actions/workflows/lint.yaml)
+
+[![molecule](https://github.com/corvus-migratorius/ansible-docker-ubuntu/actions/workflows/molecule.yaml/badge.svg)](https://github.com/corvus-migratorius/ansible-docker-ubuntu/actions/workflows/molecule.yaml)
+
+Requirements
+------------
+
+None
+
+Role Variables
+--------------
+
+None
+
+Dependencies
+------------
+
+None
+
+Example Playbook
+----------------
+
+```yaml
+roles:
+    - role: docker_ubuntu
+```
+
+License
+-------
+
+BSD
+
+Author Information
+------------------
+
+corvus-migratorius@proton.me

roles/docker_ubuntu/defaults/main.yml

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+---
+du_docker_version: "27.3.1"
+du_registry_mirrors:
+  - https://docker.io
+  - https://mirror.gcr.io

roles/docker_ubuntu/handlers/main.yml

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+---
+# handlers file for playbooks/roles/docker_ubuntu
+- name: "Restart Docker daemon"
+  ansible.builtin.systemd_service:
+    name: docker
+    state: restarted
+    daemon_reload: true
+
+- name: "Sanity check"  # noqa: no-changed-when
+  ansible.builtin.command:
+    cmd: "docker run --rm --pull=always hello-world"

roles/docker_ubuntu/meta/main.yml

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+---
+galaxy_info:
+  role_name: docker_ubuntu
+  namespace: genlab
+  author: "Alexander Gorelyshev"
+  company: "Genlab, LLC"
+  description: "Install Docker ecosystem on Ubuntu"
+  license: "MIT"
+  min_ansible_version: "2.1"
+
+  platforms:
+    - name: "Ubuntu"
+      versions: [ "focal", "jammy", "noble" ]
+
+  galaxy_tags: [ "docker" ]
+
+dependencies: []

roles/docker_ubuntu/molecule/default/converge.yml

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+---
+- name: Converge
+  hosts: all
+  roles:
+    - role: genlab.docker_ubuntu
+      du_docker_version: "27.3.1"
+      du_registry_mirrors:
+        - https://docker.io
+        - https://mirror.gcr.io

roles/docker_ubuntu/molecule/default/molecule.yml

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+---
+dependency:
+  name: galaxy
+
+driver:
+  name: docker
+
+platforms:
+  - name: ubuntu
+    image: geerlingguy/docker-${MOLECULE_DISTRO:-ubuntu2204}-ansible:latest
+    pre_build_image: true
+    command: ${MOLECULE_DOCKER_COMMAND:-""}
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup:rw
+    cgroupns_mode: host
+    privileged: true
+
+provisioner:
+  name: ansible
+
+verifier:
+  name: ansible
+
+lint: |
+  set -e
+  yamllint .
+  ansible-lint .

roles/docker_ubuntu/molecule/default/verify.yml

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+---
+- name: Verify
+  hosts: all
+  gather_facts: true
+  any_errors_fatal: true
+
+  tasks:
+    # https://github.com/ansible/molecule/issues/3587#issuecomment-1158650179
+    - name: "Include default vars"
+      ansible.builtin.include_vars:
+        dir: "{{ lookup('env', 'MOLECULE_PROJECT_DIRECTORY') }}/defaults/"
+        extensions: [ 'yml' ]
+
+    - name: "Sanity check Docker by running a `hello-world` container"  # noqa: no-changed-when
+      ansible.builtin.command:
+        cmd: "docker run --rm hello-world"
+
+    - name: "Check if `Compose` is available from PATH"  # noqa: no-changed-when
+      ansible.builtin.command:
+        cmd: "docker compose version"
+
+    - name: "Check if Docker has the expected version"  # noqa: no-changed-when
+      register: docker_version
+      ansible.builtin.command:
+        cmd: "docker version --format '{{ '{{' }} .Server.Version {{ '}}' }}'"
+
+    - name: "Check if Docker has the expected version"  # noqa: no-changed-when
+      ansible.builtin.assert:
+        that: "du_docker_version in docker_version.stdout"
+        success_msg: "Docker has the expected version ({{ docker_version.stdout }} )"
+        fail_msg: "Unexpected Docker version ({{ docker_version.stdout }})"

roles/docker_ubuntu/tasks/main.yml

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+---
+# REF: https://www.digitalocean.com/community/tutorials/how-to-use-ansible-to-install-and-set-up-docker-on-ubuntu-20-04
+
+- name: "Install aptitude"
+  ansible.builtin.apt:
+    name: aptitude
+    state: present
+    update_cache: true
+
+- name: "Install required system packages"
+  ansible.builtin.apt:
+    pkg:
+      - apt-transport-https
+      - ca-certificates
+      - curl
+      - gpg-agent
+      - python3-pip
+      - python3-setuptools
+      - software-properties-common
+      - virtualenv
+    state: present
+    update_cache: true
+
+- name: "Add Docker GPG apt Key"
+  ansible.builtin.apt_key:
+    url: https://download.docker.com/linux/ubuntu/gpg
+    state: present
+
+- name: "Add Docker Repository"
+  ansible.builtin.apt_repository:
+    repo: "deb https://download.docker.com/linux/ubuntu {{ ansible_lsb.codename }} stable"
+    state: present
+
+- name: "Install Docker ecosystem"
+  notify: "Sanity check"
+  ansible.builtin.apt:
+    pkg:
+      - docker-ce={{ du_docker_version_full }}
+      - docker-ce-cli={{ du_docker_version_full }}
+    state: present
+    update_cache: true
+
+- name: "Ensure the 'docker' group exists"
+  ansible.builtin.group:
+    name: docker
+    state: present
+    system: true
+
+- name: "Install Python tools for Docker"
+  ansible.builtin.pip:
+    name: [ docker ]
+    break_system_packages: true
+
+- name: "Configure Docker daemon"
+  notify:
+    - "Restart Docker daemon"
+    - "Sanity check"
+  ansible.builtin.template:
+    src: daemon.json.j2
+    dest: /etc/docker/daemon.json
+    owner: root
+    group: root
+    mode: "0664"
+    validate: "dockerd --validate --config-file=%s"
+
+- name: "Spin up the Docker system service"
+  notify: "Sanity check"
+  ansible.builtin.systemd:
+    name: docker
+    state: started
+    enabled: true

roles/docker_ubuntu/templates/daemon.json.j2

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+{
+    "registry-mirrors": {{ du_registry_mirrors | to_json }}
+}

roles/docker_ubuntu/vars/main.yml

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+---
+du_docker_version_full: "5:{{ du_docker_version }}-1~ubuntu.{{ ansible_lsb.release }}~{{ ansible_lsb.codename }}"