yt-dlp-dags/ansible/roles/airflow-worker/tasks/main.yml

---
- name: Check if Airflow worker deployment directory exists
  stat:
    path: "{{ airflow_worker_dir }}"
  register: worker_dir_stat

- name: Ensure Airflow worker deployment directory exists
  file:
    path: "{{ airflow_worker_dir }}"
    state: directory
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
    mode: '0755'
  become: yes
  when: not worker_dir_stat.stat.exists

- name: Ensure Airflow worker configs directory exists
  file:
    path: "{{ airflow_worker_dir }}/configs"
    state: directory
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
    mode: '0755'
  become: yes

- name: Ensure Airflow worker config directory exists
  file:
    path: "{{ airflow_worker_dir }}/config"
    state: directory
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
    mode: '0755'
  become: yes

- name: Ensure Airflow operational directories exist with correct permissions
  file:
    path: "{{ airflow_worker_dir }}/{{ item }}"
    state: directory
    owner: "{{ airflow_uid }}"
    group: "{{ deploy_group }}"
    mode: '0775'
  become: yes
  loop:
    - "dags"
    - "logs"
    - "plugins"
    - "downloadfiles"
    - "addfiles"
    - "inputfiles"

- name: "Log: Syncing Airflow core files"
  debug:
    msg: "Syncing DAGs, configs, and Python source code to the worker node."

- name: Sync Airflow worker files
  synchronize:
    src: "../{{ item }}"
    dest: "{{ airflow_worker_dir }}/"
    archive: yes
    recursive: yes
    delete: yes
    rsync_path: "sudo rsync"
    rsync_opts: "{{ rsync_default_opts }}"
  loop:
    - "airflow/Dockerfile"
    - "airflow/.dockerignore"
    - "airflow/dags"
    - "airflow/inputfiles"
    - "setup.py"
    - "yt_ops_services"
    - "thrift_model"
    - "VERSION"
    - "airflow/update-yt-dlp.sh"
    - "proxy_manager_client.py"
    - "utils"

- name: Copy custom Python config files to worker
  copy:
    src: "../airflow/config/{{ item }}"
    dest: "{{ airflow_worker_dir }}/config/{{ item }}"
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
    mode: '0644'
  become: yes
  loop:
    - "custom_task_hooks.py"
    - "airflow_local_settings.py"

- name: Ensure any existing airflow.cfg directory is removed
  file:
    path: "{{ airflow_worker_dir }}/config/airflow.cfg"
    state: absent
  become: yes
  ignore_errors: yes

- name: Copy airflow.cfg to worker
  copy:
    src: "../airflow/airflow.cfg"
    dest: "{{ airflow_worker_dir }}/config/airflow.cfg"
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
    mode: '0644'
  become: yes

- name: Check if source directories exist
  stat:
    path: "../{{ item }}"
  register: source_dirs
  loop:
    - "airflow/plugins"
    - "airflow/addfiles"
    - "airflow/bgutil-ytdlp-pot-provider"

- name: Sync optional directories if they exist
  synchronize:
    src: "../{{ item.item }}/"
    dest: "{{ airflow_worker_dir }}/{{ item.item | basename }}/"
    archive: yes
    recursive: yes
    delete: yes
    rsync_path: "sudo rsync"
    rsync_opts: "{{ rsync_default_opts }}"
  loop: "{{ source_dirs.results }}"
  when: item.stat.exists

- name: Sync pangramia thrift files
  synchronize:
    src: "../thrift_model/gen_py/pangramia/"
    dest: "{{ airflow_worker_dir }}/pangramia/"
    archive: yes
    recursive: yes
    delete: yes
    rsync_path: "sudo rsync"
    rsync_opts: "{{ rsync_default_opts }}"

- name: Ensure config directory is group-writable for Airflow initialization
  file:
    path: "{{ airflow_worker_dir }}/config"
    state: directory
    mode: '0775'
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
  become: yes

- name: Ensure airflow.cfg is group-writable for Airflow initialization
  file:
    path: "{{ airflow_worker_dir }}/config/airflow.cfg"
    state: file
    mode: '0664'
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
  become: yes

- name: Template docker-compose file for worker
  template:
    src: "{{ playbook_dir }}/../airflow/configs/docker-compose-dl.yaml.j2"
    dest: "{{ airflow_worker_dir }}/configs/docker-compose-dl.yaml"
    mode: "{{ file_permissions }}"
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
  become: yes

- name: Create .env file for Airflow worker service
  template:
    src: "../../templates/.env.j2"
    dest: "{{ airflow_worker_dir }}/.env"
    mode: "{{ file_permissions }}"
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
  become: yes
  vars:
    service_role: "worker"
    server_identity: "ytdlp-ops-service-worker-{{ inventory_hostname }}"

- name: Template Minio connection file for worker
  template:
    src: "../airflow/config/minio_default_conn.json.j2"
    dest: "{{ airflow_worker_dir }}/config/minio_default_conn.json"
    mode: "{{ file_permissions }}"
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
  become: yes

- name: Create symlink for docker-compose.yaml
  file:
    src: "{{ airflow_worker_dir }}/configs/docker-compose-dl.yaml"
    dest: "{{ airflow_worker_dir }}/docker-compose.yaml"
    state: link
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
    follow: no

- name: Ensure correct permissions for build context
  file:
    path: "{{ airflow_worker_dir }}"
    state: directory
    owner: "{{ ssh_user }}"
    group: "{{ deploy_group }}"
    recurse: yes
  become: yes

- name: Set proper ownership and permissions on worker logs directory contents
  shell: |
    chown -R {{ airflow_uid }}:{{ deploy_group }} {{ airflow_worker_dir }}/logs
    find {{ airflow_worker_dir }}/logs -type d -exec chmod g+rws {} +
    find {{ airflow_worker_dir }}/logs -type f -exec chmod g+rw {} +
  become: yes

- name: Verify Dockerfile exists in build directory
  stat:
    path: "{{ airflow_worker_dir }}/Dockerfile"
  register: dockerfile_stat

- name: Fail if Dockerfile is missing
  fail:
    msg: "Dockerfile not found in {{ airflow_worker_dir }}. Cannot build image."
  when: not dockerfile_stat.stat.exists

- name: "Log: Building Airflow Docker image"
  debug:
    msg: "Building the main Airflow Docker image ({{ airflow_image_name }}) locally on the worker node. This may take a few minutes."

- name: Build Airflow worker image
  community.docker.docker_image:
    name: "{{ airflow_image_name }}"
    build:
      path: "{{ airflow_worker_dir }}"
      dockerfile: "Dockerfile"
    source: build
    force_source: true
  when: not fast_deploy | default(false)

- name: "Log: Starting Airflow services"
  debug:
    msg: "Starting Airflow worker services (celery worker) on the node using docker-compose."

- name: Start Airflow worker service
  community.docker.docker_compose_v2:
    project_src: "{{ airflow_worker_dir }}"
    files:
      - "configs/docker-compose-dl.yaml"
    state: present
    remove_orphans: true
    pull: "{{ 'never' if fast_deploy | default(false) else 'missing' }}"