monotrope/infra/ansible/playbook.yml

---
- name: Provision monotrope.au server
  hosts: all
  become: true

  vars:
    site_dir: /var/www/monotrope
    deploy_user: deploy
    deploy_pubkey: "{{ lookup('file', lookup('env', 'HOME') + '/.ssh/id_ed25519.pub') }}"

  tasks:

    # ── System ──────────────────────────────────────────────────────────────

    - name: Update apt cache and upgrade packages
      apt:
        update_cache: true
        upgrade: dist
        cache_valid_time: 3600

    - name: Install common dependencies
      apt:
        name:
          - debian-keyring
          - debian-archive-keyring
          - apt-transport-https
          - curl
          - ufw
        state: present

    # ── Caddy ───────────────────────────────────────────────────────────────

    - name: Add Caddy GPG key
      shell: |
        curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' \
          | gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
      args:
        creates: /usr/share/keyrings/caddy-stable-archive-keyring.gpg

    - name: Add Caddy apt repository
      shell: |
        curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' \
          | tee /etc/apt/sources.list.d/caddy-stable.list
      args:
        creates: /etc/apt/sources.list.d/caddy-stable.list

    - name: Install Caddy
      apt:
        name: caddy
        state: present
        update_cache: true

    - name: Install Caddyfile
      copy:
        src: ../Caddyfile
        dest: /etc/caddy/Caddyfile
        owner: root
        group: caddy
        mode: '0640'
      notify: Restart Caddy

    - name: Enable and start Caddy
      systemd:
        name: caddy
        enabled: true
        state: started

    # ── Site directory ───────────────────────────────────────────────────────

    - name: Create www system user
      user:
        name: www
        system: true
        create_home: false
        shell: /usr/sbin/nologin
        state: present

    # ── UFW ─────────────────────────────────────────────────────────────────

    - name: Set UFW default incoming policy to deny
      ufw:
        default: deny
        direction: incoming

    - name: Set UFW default outgoing policy to allow
      ufw:
        default: allow
        direction: outgoing

    - name: Allow SSH
      ufw:
        rule: allow
        name: OpenSSH

    - name: Allow HTTP
      ufw:
        rule: allow
        port: '80'
        proto: tcp

    - name: Allow HTTPS
      ufw:
        rule: allow
        port: '443'
        proto: tcp

    - name: Enable UFW
      ufw:
        state: enabled

    # ── Docker ──────────────────────────────────────────────────────────────

    - name: Create Docker keyring directory
      file:
        path: /etc/apt/keyrings
        state: directory
        mode: '0755'

    - name: Add Docker GPG key
      shell: |
        curl -fsSL https://download.docker.com/linux/ubuntu/gpg \
          | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
        chmod a+r /etc/apt/keyrings/docker.gpg
      args:
        creates: /etc/apt/keyrings/docker.gpg

    - name: Add Docker apt repository
      shell: |
        echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
          https://download.docker.com/linux/ubuntu $(. /etc/os-release && echo "$VERSION_CODENAME") stable" \
          | tee /etc/apt/sources.list.d/docker.list
      args:
        creates: /etc/apt/sources.list.d/docker.list

    - name: Install Docker
      apt:
        name:
          - docker-ce
          - docker-ce-cli
          - containerd.io
          - docker-buildx-plugin
          - docker-compose-plugin
        state: present
        update_cache: true

    - name: Enable Docker
      systemd:
        name: docker
        enabled: true
        state: started

    # ── Deploy user ──────────────────────────────────────────────────────────

    - name: Create deploy user
      user:
        name: "{{ deploy_user }}"
        create_home: true
        shell: /bin/bash
        state: present

    - name: Set up deploy user SSH directory
      file:
        path: "/home/{{ deploy_user }}/.ssh"
        state: directory
        owner: "{{ deploy_user }}"
        group: "{{ deploy_user }}"
        mode: '0700'

    - name: Install deploy user SSH public key
      ansible.posix.authorized_key:
        user: "{{ deploy_user }}"
        key: "{{ deploy_pubkey }}"
        state: present

    - name: Create site directory
      file:
        path: "{{ site_dir }}"
        state: directory
        owner: "{{ deploy_user }}"
        group: www
        mode: '0775'

  handlers:

    - name: Restart Caddy
      systemd:
        name: caddy
        state: restarted