blumeops/ansible/roles/sifaka_exporters/tasks/main.yml

---
# Manage Prometheus exporter containers on sifaka NAS
# Uses command module to avoid requiring docker Python SDK on Synology
# Requires passwordless sudo for docker — see docs/reference/storage/sifaka.md

# --- node_exporter ---

- name: Pull node_exporter image
  ansible.builtin.command: "{{ sifaka_exporters_docker }} pull {{ sifaka_exporters_node_exporter_image }}"
  become: true
  register: sifaka_exporters_node_pull
  changed_when: "'Downloaded newer image' in sifaka_exporters_node_pull.stdout"

- name: Check if node_exporter container exists
  ansible.builtin.command: "{{ sifaka_exporters_docker }} inspect {{ sifaka_exporters_node_exporter_name }} --format {% raw %}'{{.Config.Image}}'{% endraw %}"
  become: true
  register: sifaka_exporters_node_inspect
  changed_when: false
  failed_when: false

- name: Remove node_exporter container if image changed
  ansible.builtin.command: "{{ sifaka_exporters_docker }} rm -f {{ sifaka_exporters_node_exporter_name }}"
  become: true
  when:
    - sifaka_exporters_node_inspect.rc == 0
    - sifaka_exporters_node_inspect.stdout != sifaka_exporters_node_exporter_image
  changed_when: true

- name: Start node_exporter container
  ansible.builtin.command:
    argv:
      - "{{ sifaka_exporters_docker }}"
      - run
      - -d
      - "--name={{ sifaka_exporters_node_exporter_name }}"
      - --restart=always
      - --net=host
      - "{{ sifaka_exporters_node_exporter_image }}"
  become: true
  register: sifaka_exporters_node_start
  when: >
    sifaka_exporters_node_inspect.rc != 0 or
    sifaka_exporters_node_inspect.stdout != sifaka_exporters_node_exporter_image
  changed_when: sifaka_exporters_node_start.rc == 0

# --- smartctl_exporter ---

- name: Pull smartctl_exporter image
  ansible.builtin.command: "{{ sifaka_exporters_docker }} pull {{ sifaka_exporters_smartctl_exporter_image }}"
  become: true
  register: sifaka_exporters_smartctl_pull
  changed_when: "'Downloaded newer image' in sifaka_exporters_smartctl_pull.stdout"

- name: Check if smartctl_exporter container exists
  ansible.builtin.command: "{{ sifaka_exporters_docker }} inspect {{ sifaka_exporters_smartctl_exporter_name }} --format {% raw %}'{{.Config.Image}}'{% endraw %}"
  become: true
  register: sifaka_exporters_smartctl_inspect
  changed_when: false
  failed_when: false

- name: Remove smartctl_exporter container if image changed
  ansible.builtin.command: "{{ sifaka_exporters_docker }} rm -f {{ sifaka_exporters_smartctl_exporter_name }}"
  become: true
  when:
    - sifaka_exporters_smartctl_inspect.rc == 0
    - sifaka_exporters_smartctl_inspect.stdout != sifaka_exporters_smartctl_exporter_image
  changed_when: true

- name: Build smartctl_exporter device arguments
  ansible.builtin.set_fact:
    sifaka_exporters_smartctl_device_args: >-
      {{ sifaka_exporters_smartctl_devices | map('regex_replace', '^(.*)$', '--smartctl.device=\1') | list }}

- name: Start smartctl_exporter container
  ansible.builtin.command:
    argv: >-
      {{ [
        sifaka_exporters_docker, 'run', '-d',
        '--name=' + sifaka_exporters_smartctl_exporter_name,
        '--restart=always',
        '--privileged',
        '--user=root',
        '-p', sifaka_smartctl_exporter_port | string + ':' + sifaka_smartctl_exporter_port | string,
        sifaka_exporters_smartctl_exporter_image
      ] + sifaka_exporters_smartctl_device_args }}
  become: true
  register: sifaka_exporters_smartctl_start
  when: >
    sifaka_exporters_smartctl_inspect.rc != 0 or
    sifaka_exporters_smartctl_inspect.stdout != sifaka_exporters_smartctl_exporter_image
  changed_when: sifaka_exporters_smartctl_start.rc == 0