ci: Add tests, fix code style (fixes #2)

.gitlab-ci.yml

+variables:
+  PROJECT_ID: ${CI_PROJECT_ID}
+  ROLE: ${CI_PROJECT_NAME}
+  BRANCH: ${CI_COMMIT_REF_NAME}
+  TAG: ${CI_COMMIT_TAG}
+  PUBLISH: "true"
+
+test:
+  trigger:
+    project: ecgalaxy/tooling
+    strategy: depend

.yamllint

+---
+# Based on ansible-lint config
+extends: default
+
+rules:
+  braces:
+    max-spaces-inside: 1
+    level: error
+  brackets:
+    max-spaces-inside: 1
+    level: error
+  colons:
+    max-spaces-after: -1
+    level: error
+  commas:
+    max-spaces-after: -1
+    level: error
+  comments: disable
+  comments-indentation: disable
+  document-start: disable
+  empty-lines:
+    max: 3
+    level: error
+  hyphens:
+    level: error
+  indentation: disable
+  key-duplicates: enable
+  line-length: disable
+  new-line-at-end-of-file: disable
+  new-lines:
+    type: unix
+  trailing-spaces: disable
+  truthy: disable

README.md

 ECGALAXY microk8s
 ===============
 
-Ansible role that installs microk8s and addons.
+Ansible role that installs [MicroK8s](https://microk8s.io/) and addons.
 
 Requirements
 ------------
 
-- Currently, only supported on Ubuntu 22.04 LTS.
+- Ubuntu 22.04 LTS, which is the only platform currently supported.
+- [Snap](https://snapcraft.io/).
 
 Role Variables
 --------------
@@ -17,6 +18,7 @@ Role Variables
 
 Dependencies
 ------------
+
 None.
 
 Example Playbook

meta/main.yml

 ---
 galaxy_info:
   author: ecgalaxy
-  description: Ansible role that installs microk8s and addons.
+  description: Ansible role that installs MicroK8s and addons
   company: European Commission
   license: EUPL-1.2
   min_ansible_version: "2.5"
@@ -10,5 +10,8 @@ galaxy_info:
       versions:
         - jammy
   galaxy_tags:
+    - containers
+    - k8s
+    - kubernetes
     - microk8s
 dependencies: []

molecule/default/converge.yml

+---
+- name: Converge
+  hosts: all
+  tasks:
+    - name: Include microk8s
+      ansible.builtin.include_role:
+        name: microk8s
+  vars:
+    microk8s_user: 'microk8s_user'
+  environment:
+    http_proxy: "{{ lookup('env', 'http_proxy') }}"
+    https_proxy: "{{ lookup('env', 'https_proxy') }}"
+    no_proxy: "{{ lookup('env', 'no_proxy') }}"

molecule/default/molecule.yml

+---
+dependency:
+  name: galaxy
+driver:
+  name: docker
+platforms:
+  - name: ubuntu2204-${CI_JOB_ID:-0}
+    image: code.europa.eu:4567/ecgalaxy/ubuntu2204-ansible:latest
+    command: ""
+    volumes:  
+      - /sys/fs/cgroup:/sys/fs/cgroup
+      - /sys/kernel/security:/sys/kernel/security
+    cgroupns_mode: host
+    privileged: true
+    pre_build_image: true
+    environment:
+      http_proxy: "${http_proxy}"
+      https_proxy: "${https_proxy}"
+      no_proxy: "${no_proxy}"
+provisioner:
+  name: ansible
+  inventory:
+    group_vars:
+      all:
+        ansible_user: ansible
+verifier:
+  name: ansible
+lint: |
+  set -e
+  yamllint .
+  ansible-lint .

molecule/default/prepare.yml

+---
+- name: Prepare
+  hosts: all
+  tasks:
+    - name: Update apt cache
+      ansible.builtin.apt:
+        update_cache: true
+        cache_valid_time: 600
+      when: ansible_os_family == 'Debian'
+      changed_when: false
+    - name: Install dependencies
+      ansible.builtin.package:
+        name:
+          - fuse
+          - snap
+          - snapd
+          - squashfuse
+        state: present
+    - name: Start snapd
+      ansible.builtin.systemd:
+        name: snapd
+        enabled: yes
+        state: started
+  environment:
+    http_proxy: "{{ lookup('env', 'http_proxy') }}"
+    https_proxy: "{{ lookup('env', 'https_proxy') }}"
+    no_proxy: "{{ lookup('env', 'no_proxy') }}"
+  become: true

molecule/default/verify.yml

+---
+- name: Verify
+  hosts: all
+  vars_files:
+    - ../../defaults/main.yml
+  tasks:
+    - name: Check microk8s execution
+      ansible.builtin.command: /snap/bin/microk8s version # noqa no-changed-when
+      register: output
+      become: true
+    - name: Assert return code is 0
+      ansible.builtin.assert:
+        that:
+        - output.rc == 0

tasks/main.yml

 ---
-
 - name: Assert microk8s_user is set
   ansible.builtin.assert:
     that:
@@ -9,44 +8,54 @@
     fail_msg: "The variable 'microk8s_user' has not been set."
     success_msg: "'microk8s_user' is currently set to {{ microk8s_user }}"
 
-- name: "Ensure that the user '{{ microk8s_user }}' exists."
-  become: true
+- name: "Ensure that the following user exists: '{{ microk8s_user }}'"
   ansible.builtin.user:
     name: "{{ microk8s_user }}"
     create_home: true
     state: "present"
   register: microk8s_user_info
+  become: true
 
 - name: "Retrieve user home directory for user: '{{ microk8s_user }}'"
   ansible.builtin.set_fact:
     user_home_dir: "{{ microk8s_user_info.home }}"
 
 - name: Install microk8s using snap
-  become: true
+  block:
+    - name: Install microk8s using snap
       community.general.snap:
         name: microk8s
         classic: true
         channel: "{{ microk8s_version }}"
+      become: true
 
-- name: "Add user '{{ microk8s_user }}' to group microk8s"
+  rescue:
+    - name: Install microk8s using snap (rescue)
+      ansible.builtin.command: "snap install microk8s --classic --channel={{ microk8s_version }}"
       become: true
+      register: cmd_result
+      changed_when: "'already installed' not in cmd_result.stdout"
+      failed_when: "'installed' not in cmd_result.stdout"
+
+- name: "Add following user to group microk8s: '{{ microk8s_user }}'"
   ansible.builtin.user:
     name: "{{ microk8s_user }}"
     groups: microk8s
+  become: true
 
 - name: "Set ownership of $HOME/.kube caching directory"
-  become: true
   ansible.builtin.file:
     path: "{{ user_home_dir }}/.kube"
     recurse: true
     owner: "{{ microk8s_user }}"
     group: "{{ microk8s_user }}"
     state: directory
+  become: true
 
 - name: Enable addons in microk8s
-  become: true
   ansible.builtin.command:
     cmd: microk8s enable {{ item }}
   loop: "{{ microk8s_addons }}"
   register: enable_output
   changed_when: "'already enabled' not in enable_output.stdout"
+  become: true