add docker_ubuntu role

roles/docker_ubuntu/molecule/default/converge.yml

@@ -0,0 +1,9 @@
+---
+- 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

@@ -0,0 +1,27 @@
+---
+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

@@ -0,0 +1,31 @@
+---
+- 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 }})"