toallab-automation/roles/ikke_t.podman_container_systemd/tasks/main.yml

---

- name: prepare rootless stuff if needed
  block:

    - name: get user information
      user:
        name: "{{ container_run_as_user }}"
      check_mode: true
      register: user_info

    - name: set systemd dir if user is not root
      set_fact:
        service_files_dir: "{{ user_info.home }}/.config/systemd/user"
        systemd_scope: user
      changed_when: false

    - name: ensure systemd files directory exists if user not root
      file:
        path: "{{ service_files_dir }}"
        state: directory
        owner: "{{ container_run_as_user }}"
        group: "{{ container_run_as_group }}"

  when: container_run_as_user != "root"

- name: "Find uid of user"
  command: "id -u {{ container_run_as_user }}"
  register: container_run_as_uid
  check_mode: false  # Run even in check mode, to avoid fail with --check.
  changed_when: false

- name: set systemd runtime dir
  set_fact:
    xdg_runtime_dir: "/run/user/{{ container_run_as_uid.stdout }}"
  changed_when: false

- name: set systemd scope to system if needed
  set_fact:
    systemd_scope: system
    service_files_dir: '/etc/systemd/system'
    xdg_runtime_dir: "/run/user/{{ container_run_as_uid.stdout }}"
  when: container_run_as_user == "root"
  changed_when: false

- name: check if service file exists already
  stat:
    path: "{{ service_files_dir }}/{{ service_name }}"
  register: service_file_before_template

- name: do tasks when "{{ service_name }}" state is "running"
  block:

  - name: Check for user namespace support in kernel
    stat:
      path: /proc/sys/kernel/unprivileged_userns_clone
    register: unprivileged_userns_clone
    changed_when: false

  - name: Allow unprivileged users on Debian
    sysctl:
      name: kernel.unprivileged_userns_clone
      value: '1'
      state: present
      sysctl_file: /etc/sysctl.d/userns.conf
      sysctl_set: true
    when:
      - ansible_distribution == 'Debian'
      - unprivileged_userns_clone.stat.exists

  - name: Install rootless dependencies on Debian-based
    package:
      name: "{{ podman_dependencies_rootless }}"
      state: present
    when:
      - ansible_os_family == 'Debian'
      - container_run_as_user != 'root'

  - name: ensure podman is installed
    package:
      name: podman
      state: present
    when: not skip_podman_install

  - name: check user exists
    user:
      name: "{{ container_run_as_user }}"

  - name: Check subuid & subgid
    import_tasks: check_subid.yml

  - name: running single container, get image Id if it exists and we are root
    # XXX podman doesn't work through sudo for non root users,
    # so skip preload if user
    # https://github.com/containers/libpod/issues/5570
    # command: podman inspect -f {{.Id}} "{{ container_image }}"
    command: "podman image inspect -f '{{ '{{' }}.Id{{ '}}' }}' {{ item }}"
    register: pre_pull_id
    ignore_errors: true
    when:
      - container_image_list is defined
      - container_image_list | length == 1
      - container_run_as_user == 'root'
    with_items: "{{ container_image_list }}"

  - name: running single container, ensure we have up to date container image
    containers.podman.podman_image:
      name: "{{ item }}"
      force: true
      username: "{{ container_image_user | default(omit) }}"
      password: "{{ container_image_password | default(omit) }}"
    notify: restart service
    become: true
    become_user: "{{ container_run_as_user }}"
    when:
      - container_image_list is defined
      - container_image_list | length == 1
      - container_run_as_user == 'root'
    with_items: "{{ container_image_list }}"

  - name: running single container, get image Id if it exists
    command:
      "podman image inspect -f '{{ '{{' }}.Id{{ '}}' }}'  {{ item }}"
    become: true
    become_user: "{{ container_run_as_user }}"
    register: post_pull_id
    ignore_errors: true
    when:
      - container_image_list is defined
      - container_image_list | length == 1
      - container_run_as_user == 'root'
    with_items: "{{ container_image_list }}"

  - name: seems we use several container images, ensure all are up to date
    containers.podman.podman_image:
      name: "{{ item }}"
      force: true
      username: "{{ container_image_user | default(omit) }}"
      password: "{{ container_image_password | default(omit) }}"
    become: true
    become_user: "{{ container_run_as_user }}"
    when: container_image_list is defined and container_image_list | length > 1
    with_items: "{{ container_image_list }}"

  - name: if running pod, ensure configuration file exists
    stat:
      path: "{{ container_pod_yaml }}"
    register: pod_file
    when: container_pod_yaml is defined
  - name: fail if pod configuration file is missing
    fail:
      msg: >
        "Error: Asking to run pod, but pod definition yaml file is missing: "
        "{{ container_pod_yaml }}"
    when:
      - container_pod_yaml is defined
      - not pod_file.stat.exists

  - name: Check if user is lingering
    stat:
      path: "/var/lib/systemd/linger/{{ container_run_as_user }}"
    register: user_lingering
    when: container_run_as_user != "root"

  - name: Enable lingering is needed
    command: "loginctl enable-linger {{ container_run_as_user }}"
    when:
      - container_run_as_user != "root"
      - not user_lingering.stat.exists

  - name: "create systemd service file for container: {{ container_name }}"
    template:
      src: systemd-service-single.j2
      dest: "{{ service_files_dir }}/{{ service_name }}"
      owner: root
      group: root
      mode: 0644
    notify:
      - reload systemctl
      - start service
      - enable service
    register: service_file
    when: container_image_list is defined and container_image_list | length == 1

  - name: "create systemd service file for pod: {{ container_name }}"
    template:
      src: systemd-service-pod.j2
      dest: "{{ service_files_dir }}/{{ service_name }}"
      owner: root
      group: root
      mode: 0644
    notify:
      - reload systemctl
      - start service
      - enable service
    register: service_file
    when: container_image_list is defined and container_image_list | length > 1

  - name: "ensure {{ service_name }} is restarted due config change"
    debug: msg="config has changed:"
    changed_when: true
    notify: restart service
    when:
      - service_file_before_template.stat.exists
      - service_file.changed

  when: container_state == "running"

- name: configure firewall if container_firewall_ports is defined
  block:

  - name: set firewall ports state to enabled when container state is running
    set_fact:
      fw_state: enabled
    when: container_state == "running"

  - name: disable firewall ports state when container state is not running
    set_fact:
      fw_state: disabled
    when: container_state != "running"

  - name: ensure firewalld is installed
    tags: firewall
    package: name=firewalld state=present
    when: ansible_pkg_mgr != "atomic_container"

  - name: ensure firewalld is installed (on fedora-iot)
    tags: firewall
    command: >-
      rpm-ostree install --idempotent --unchanged-exit-77
      --allow-inactive firewalld
    register: ostree
    failed_when: not ( ostree.rc == 77 or ostree.rc == 0 )
    changed_when: ostree.rc != 77
    when: ansible_pkg_mgr == "atomic_container"

  - name: reboot if new stuff was installed
    reboot:
      reboot_timeout: 300
    when:
      - ansible_pkg_mgr == "atomic_container"
      - ostree.rc != 77

  - name: ensure firewall service is running
    tags: firewall
    service: name=firewalld state=started

  - name: ensure container's exposed ports firewall state
    tags: firewall
    firewalld:
      port: "{{ item }}"
      permanent: true
      immediate: true
      state: "{{ fw_state }}"
    with_items: "{{ container_firewall_ports }}"

  - name: Force all notified handlers to run at this point
    meta: flush_handlers

  when: container_firewall_ports is defined


- name: do cleanup stuff when container_state is "absent"
  block:

  - name: ensure "{{ service_name }}" is disabled at boot
    become: true
    become_user: "{{ container_run_as_user }}"
    # become_method: machinectl
    environment:
      XDG_RUNTIME_DIR: "{{ xdg_runtime_dir }}"
    systemd:
      name: "{{ service_name }}"
      enabled: false
      scope: "{{ systemd_scope }}"
    when:
      - service_file_before_template.stat.exists

  - name: ensure "{{ service_name }}" is stopped
    become: true
    become_user: "{{ container_run_as_user }}"
    # become_method: machinectl
    environment:
      XDG_RUNTIME_DIR: "{{ xdg_runtime_dir }}"
    systemd:
      name: "{{ service_name }}"
      state: stopped
      enabled: false
      scope: "{{ systemd_scope }}"
    when:
      - service_file_before_template.stat.exists

  - name: clean up systemd service file
    file:
      path: "{{ service_files_dir }}/{{ service_name }}"
      state: absent
    notify: reload systemctl

  - name: Force all notified handlers to run at this point
    meta: flush_handlers

  - name: Check if user is lingering
    stat:
      path: "/var/lib/systemd/linger/{{ container_run_as_user }}"
    register: user_lingering
    when: container_run_as_user != "root"

  - name: Disable lingering (are we sure we want to do this always?)
    command: "loginctl disable-linger {{ container_run_as_user }}"
    when:
      - container_run_as_user != "root"
      - user_lingering.stat.exists

  - name: clean up pod configuration file
    file:
      path: "{{ container_pod_yaml }}"
      state: absent
    when: container_pod_yaml is defined

  when: container_state == "absent"