homeserver.zernis.ch/roles/docker/tasks/main.yml

---
- name: Set amd64 arch
  ansible.builtin.set_fact:
    repo_arch: amd64
  when: ansible_architecture == "x86_64"

- name: Set arm64 arch
  ansible.builtin.set_fact:
    repo_arch: "{{ ansible_architecture }}"
  when: (ansible_architecture == "arm64") or (ansible_architecture == "aarch64")

- name: Install required system packages
  ansible.builtin.package:
    state: present
    name: "{{ docker_deps }}"

- name: Add Docker GPG apt Key
  ansible.builtin.get_url:
    url: "https://download.docker.com/linux/{{ ansible_facts['distribution'] | lower }}/gpg"
    dest: /etc/apt/trusted.gpg.d/docker.asc
    mode: '0644'

- name: Add Docker Repository
  ansible.builtin.apt_repository:
    repo: "deb [arch={{ repo_arch }} signed-by=/etc/apt/trusted.gpg.d/docker.asc] https://download.docker.com/linux/{{ ansible_facts['distribution'] | lower }} {{ ansible_lsb['codename'] }} stable"
    state: present

- name: Update apt and install docker
  ansible.builtin.apt:
    update_cache: true
    name: "{{ docker_packages }}"
    state: present

- name: Ensure group docker exists
  ansible.builtin.group:
    name: docker
    state: present

- name: Add user to group docker | "{{ system_user_name }}"
  ansible.builtin.user:
    name: "{{ system_user_name }}"
    groups:
      - docker
    append: true

- name: Install Docker Module for Python
  ansible.builtin.pip:
    name: docker

- name: Make sure Docker is running and enabled
  ansible.builtin.systemd:
    name: docker
    daemon_reload: true
    state: started
    enabled: true
    
- name: Create docker dir if it does not exist
  become: false
  ansible.builtin.file:
    path: /home/{{ system_user_name }}/docker/
    state: directory
    mode: '0755'

- name: Create cronjob to prune unused docker stuff
  ansible.builtin.cron:
    user: "{{ system_user_name }}"
    name: "prune unused docker stuff every night at 00:15"
    minute: "15"
    hour: "00"
    job: 'sudo docker system prune -af  --filter "until=$((30*24))h"'
  notify: Restart cron