infra/ansible/roles/profile_backend_phase1/tasks/main.yml

---
- name: Configure Atlas phase-one backend services
  tags: [backend_phase1, podman]
  when: backend_phase1_enabled | bool
  block:
    - name: Validate phase-one backend inputs
      ansible.builtin.assert:
        that:
          - not (atlas_manage_media_stack | bool)
          - backend_phase1_wireguard_interface in ansible_facts.interfaces
          - backend_phase1_wireguard_address != 'CHANGEME_ATLAS_WIREGUARD_ADDRESS'
          - backend_phase1_music_dir.startswith('/')
          - backend_phase1_app_data_root.startswith('/')
          - backend_phase1_navidrome_data_dir.startswith(backend_phase1_app_data_root + '/')
          - backend_phase1_syncthing_root.startswith(backend_phase1_app_data_root + '/')
        fail_msg: >-
          Disable the rootful media-stack gate and provide the active
          WireGuard interface/address and absolute ZFS-backed paths before
          enabling phase one. This role does not manage Prometheus or migrate
          Navidrome application data.

    - name: Read the rootless service account
      ansible.builtin.getent:
        database: passwd
        key: "{{ backend_phase1_username }}"

    - name: Record rootless service account IDs
      ansible.builtin.set_fact:
        backend_phase1_uid: "{{ ansible_facts['getent_passwd'][backend_phase1_username][1] }}"
        backend_phase1_gid: "{{ ansible_facts['getent_passwd'][backend_phase1_username][2] }}"

    - name: Read system service state before starting rootless Syncthing
      ansible.builtin.service_facts:

    - name: Refuse to overlap a system-level Atlas Syncthing service
      ansible.builtin.assert:
        that:
          - >-
            ansible_facts.services['atlas-syncthing.service'] is not defined
            or ansible_facts.services['atlas-syncthing.service'].state != 'running'
        fail_msg: >-
          Remove or stop the system-level atlas-syncthing.service before
          enabling the rootless Syncthing Quadlet.

    - name: Inspect required ZFS datasets
      community.general.zfs_facts:
        name: "{{ item.dataset }}"
        properties: name,mounted,mountpoint
      loop:
        - dataset: "{{ backend_phase1_music_dataset }}"
          mountpoint: "{{ backend_phase1_music_dir }}"
        - dataset: "{{ backend_phase1_app_data_dataset }}"
          mountpoint: "{{ backend_phase1_app_data_root }}"
        - dataset: "{{ backend_phase1_navidrome_dataset }}"
          mountpoint: "{{ backend_phase1_navidrome_data_dir }}"
        - dataset: "{{ backend_phase1_syncthing_dataset }}"
          mountpoint: "{{ backend_phase1_syncthing_root }}"
      loop_control:
        label: "{{ item.dataset }}"
      register: backend_phase1_zfs_facts

    - name: Require mounted datasets at the declared paths
      ansible.builtin.assert:
        that:
          - item.ansible_facts.ansible_zfs_datasets | length == 1
          - item.ansible_facts.ansible_zfs_datasets[0].mounted == 'yes'
          - item.ansible_facts.ansible_zfs_datasets[0].mountpoint == item.item.mountpoint
        fail_msg: >-
          {{ item.item.dataset }} must already be mounted at
          {{ item.item.mountpoint }}. The phase-one role never creates or
          imports the pool.
      loop: "{{ backend_phase1_zfs_facts.results }}"
      loop_control:
        label: "{{ item.item.dataset }}"

    - name: Enable lingering for the rootless service account
      ansible.builtin.command:
        argv:
          - loginctl
          - enable-linger
          - "{{ backend_phase1_username }}"
        creates: "/var/lib/systemd/linger/{{ backend_phase1_username }}"

    - name: Start the rootless user systemd manager
      ansible.builtin.systemd:
        name: "user@{{ backend_phase1_uid }}.service"
        state: started
      when: not ansible_check_mode

    - name: Create rootless Quadlet and application directories
      ansible.builtin.file:
        path: "{{ item.path }}"
        state: directory
        owner: "{{ backend_phase1_username }}"
        group: "{{ backend_phase1_user_group }}"
        mode: "{{ item.mode }}"
      loop:
        - path: "{{ backend_phase1_quadlet_dir }}"
          mode: "0700"
        - path: "{{ backend_phase1_navidrome_data_dir }}"
          mode: "0750"
        - path: "{{ backend_phase1_syncthing_root }}"
          mode: "0750"
      loop_control:
        label: "{{ item.path }}"

    - name: Render the rootless Navidrome Quadlet
      ansible.builtin.template:
        src: atlas-navidrome.container.j2
        dest: "{{ backend_phase1_quadlet_dir }}/atlas-navidrome.container"
        owner: "{{ backend_phase1_username }}"
        group: "{{ backend_phase1_user_group }}"
        mode: "0644"
      notify: Restart Atlas Navidrome Quadlet

    - name: Render the rootless Syncthing Quadlet
      ansible.builtin.template:
        src: atlas-syncthing.container.j2
        dest: "{{ backend_phase1_quadlet_dir }}/atlas-syncthing.container"
        owner: "{{ backend_phase1_username }}"
        group: "{{ backend_phase1_user_group }}"
        mode: "0644"
      notify: Restart Atlas Syncthing Quadlet

    - name: Reload the rootless user systemd manager
      become_user: "{{ backend_phase1_username }}"
      ansible.builtin.systemd:
        scope: user
        daemon_reload: true
      environment:
        XDG_RUNTIME_DIR: "/run/user/{{ backend_phase1_uid }}"
        DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ backend_phase1_uid }}/bus"
      when: not ansible_check_mode

    - name: Permit phase-one services only through the WireGuard zone
      ansible.posix.firewalld:
        port: "{{ item }}"
        zone: "{{ backend_phase1_wireguard_firewalld_zone }}"
        state: enabled
        permanent: true
        immediate: true
      loop:
        - "{{ backend_phase1_navidrome_port }}/tcp"
        - "{{ backend_phase1_syncthing_gui_port }}/tcp"
        - "{{ backend_phase1_syncthing_transfer_port }}/tcp"
        - "{{ backend_phase1_syncthing_transfer_port }}/udp"
        - "{{ backend_phase1_syncthing_discovery_port }}/udp"

    - name: Start rootless phase-one Quadlets
      become_user: "{{ backend_phase1_username }}"
      ansible.builtin.systemd:
        name: "{{ item }}"
        scope: user
        state: started
        enabled: true
        daemon_reload: true
      environment:
        XDG_RUNTIME_DIR: "/run/user/{{ backend_phase1_uid }}"
        DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ backend_phase1_uid }}/bus"
      loop: "{{ backend_phase1_services }}"
      when:
        - backend_phase1_start_services | bool
        - not ansible_check_mode