Added native Molecule jobs

Change-Id: Idaabccf0387e88e443354ee0100492e702018453

playbooks/molecule/post-run.yaml

@@ -0,0 +1,4 @@
+---
+- hosts: ubuntu-focal
+  tasks:
+    - shell: "{{ molecule_executable }} destroy"

playbooks/molecule/pre-run.yaml

@@ -0,0 +1,36 @@
+---
+- hosts: ubuntu-focal
+  roles:
+    - role: ensure-clouds-yaml
+    - role: ensure-molecule
+      vars:
+        molecule_version: 3.5.2
+
+- hosts: ubuntu-focal
+  tasks:
+    - shell: "{{ molecule_executable }} prepare"
+
+- hosts: localhost
+  tasks:
+    - name: Grab the Molecule instance configuration
+      set_fact:
+        molecule_instance_config: "{{ lookup('file', molecule_instance_config_path) | from_yaml }}"
+      vars:
+        molecule_instance_config_path: "{{ ansible_user_dir }}/.cache/molecule/{{ zuul.project.short_name }}/default/instance_config.yml"
+
+    - name: Add all of the hosts to the inventory
+      add_host:
+        name: "{{ item.instance }}"
+        ansible_user: "{{ item.user }}"
+        ansible_host: "{{ item.address }}"
+        ansible_port: "{{ item.port }}"
+        ansible_private_key_file: "{{ item.identity_file }}"
+        ansible_ssh_extra_args: -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no
+      loop: "{{ molecule_instance_config }}"
+      loop_control:
+        label: "{{ item.instance }}"
+
+- hosts: all
+  tasks:
+    - ping:
+

playbooks/molecule/run.yaml

@@ -0,0 +1,6 @@
+---
+- hosts: ubuntu-focal
+  tasks:
+    - shell: "{{ molecule_executable }} converge"
+    - shell: "{{ molecule_executable }} idempotence"
+    - shell: "{{ molecule_executable }} verify"

roles/ensure-molecule/README.rst

@@ -0,0 +1,25 @@
+Ensure Molecule is installed
+
+Look for ``molecule``, and if not found, install it via ``pip`` into a
+virtual environment for the current user.
+
+**Role Variables**
+
+.. zuul:rolevar:: molecule_version
+   :default: 3.6.1
+
+   Molecule version to install on the host.
+
+**Output Variables**
+
+.. zuul:rolevar:: molecule_executable
+   :default: molecule
+
+   After running this role, ``molecule_executable`` will be set as the path
+   to a valid ``molecule``.
+
+   At role runtime, look for an existing ``molecule`` at this specific
+   path.  Note the default (``molecule``) effectively means to find tox in
+   the current ``$PATH``.  For example, if your base image
+   pre-installs molecule in an out-of-path environment, set this so the
+   role does not attempt to install the user version.

roles/ensure-molecule/defaults/main.yaml

@@ -0,0 +1,2 @@
+molecule_executable: molecule
+molecule_venv_path: '{{ ansible_user_dir }}/.local/molecule'

roles/ensure-molecule/tasks/main.yaml

@@ -0,0 +1,34 @@
+- name: Install pip
+  include_role:
+    name: ensure-pip
+
+- name: Check if molecule is installed
+  shell: |
+    command -v {{ molecule_executable }} {{ molecule_venv_path }}/bin/molecule || exit 1
+  args:
+    executable: /bin/bash
+  register: molecule_preinstalled
+  failed_when: false
+
+- name: Export preinstalled molecule_executable
+  set_fact:
+    molecule_executable: '{{ molecule_preinstalled.stdout_lines[0] }}'
+    cacheable: true
+  when: molecule_preinstalled.rc == 0
+
+- name: Install molecule to local env
+  when: molecule_preinstalled.rc != 0
+  block:
+    - name: Create local venv
+      command: '{{ ensure_pip_virtualenv_command }} {{ molecule_venv_path }}'
+
+    - name: Install molecule to local venv
+      command: '{{ molecule_venv_path }}/bin/pip install molecule'
+
+    - name: Export installed molecule_executable path
+      set_fact:
+        molecule_executable: '{{ molecule_venv_path }}/bin/molecule'
+        cacheable: true
+
+- name: Output molecule version
+  command: "{{ molecule_executable }} --version"

zuul.d/jobs.yaml

@@ -13,6 +13,25 @@
       tox_environment:
         OS_CLOUD: default
 
+- job:
+    name: molecule
+    allowed-projects:
+      - vexxhost/ansible-collection-atmosphere
+    pre-run:
+      - playbooks/molecule/pre-run.yaml
+    run:
+      - playbooks/molecule/run.yaml
+    post-run:
+      - playbooks/molecule/post-run.yaml
+    cleanup-run:
+      - playbooks/molecule/post-run.yaml
+    secrets:
+      - name: openstack_credentials
+        secret: vexxhost-openstack
+    vars:
+      tox_environment:
+        OS_CLOUD: default
+
 - job:
     name: vexxhost-build-docker-image
     parent: opendev-build-docker-image