prometheus/tasks/exporter/_common.yml

---

# to build prometheus repo for another var: https://docs.ansible.com/ansible/latest/reference_appendices/faq.html#when-should-i-use-also-how-to-interpolate-variables-or-dynamic-variable-names
- set_fact:
    prometheus_repo: "{{ lookup('vars', 'prometheus_repo_' ~ exporter) }}"

#- name: debug
#  debug:
#    msg: "Repo: {{ prometheus_repo }}"

- name: '{{ exporter }} exporter | check if exporter is already install'
  stat:
    path: /usr/local/bin/prometheus-{{ exporter }}-exporter
  register: stat_result
  tags: [ 'prometheus_{{ exporter }}' ]

- name: '{{ exporter }} exporter | stop old version'
  systemd:
    name: prometheus-{{ exporter }}-exporter.service
    state: stopped
  when: exporter_upgrade == "yes"
  tags: [ 'prometheus_{{ exporter }}' ]

- name: '{{ exporter }} exporter | remove old version'
  file:
    path: /usr/local/bin/prometheus-{{ exporter }}-exporter
    state: absent
  when: exporter_upgrade == "yes"
  tags: [ 'prometheus_{{ exporter }}' ]

# If prometheus_exporters_sources == "repo"
- name: '{{ exporter }} exporter | download from repo'
  get_url:
    url: "{{prometheus_exporters_repo}}/releases/download/{{prometheus_exporters_release}}/{{exporter}}_exporter"
    dest: /usr/local/bin/prometheus-{{ exporter }}-exporter
    remote_src: yes
    owner: root
    group: root
    mode: 0755
  ignore_errors: '{{ ansible_check_mode }}'
  when: >
    (not stat_result.stat.exists or exporter_upgrade == "yes") and
    prometheus_exporters_sources == "repo"
  tags: [ 'prometheus_{{ exporter }}' ]

# If prometheus_exporters_sources == "origin"
- name: '{{ exporter }} exporter | create temp path'
  file:
    state: directory
    path: /tmp/prometheus_exporter/{{ exporter }}
  when: >
    (not stat_result.stat.exists or exporter_upgrade == "yes") and
    prometheus_exporters_sources == "origin"
  tags: [ 'prometheus_{{ exporter }}' ]

- name: '{{ exporter }} exporter | get latest release from GitHub'
  shell: curl --silent "https://api.github.com/repos/{{ prometheus_repo }}/{{ exporter }}_exporter/releases/latest" | jq -r .tag_name | sed "s/v//"
  register: prometheus_exporter_latest_version
  run_once: true
  when: >
    (not stat_result.stat.exists or exporter_upgrade == "yes") and
    prometheus_exporters_sources == "origin"
  tags: [ 'prometheus_{{ exporter }}' ]

- name: '{{ exporter }} exporter | download from origin'
  get_url:
    url: "https://github.com/{{ prometheus_repo }}/{{ exporter }}_exporter/releases/download/v{{ prometheus_exporter_latest_version.stdout }}/{{ exporter }}_exporter-{{ prometheus_exporter_latest_version.stdout }}.{{ prometheus_os }}-{{ prometheus_arch }}.tar.gz"
    dest: /tmp/prometheus_exporter/{{ exporter }}/
  ignore_errors: '{{ ansible_check_mode }}'
  when: >
    (not stat_result.stat.exists or exporter_upgrade == "yes") and
    prometheus_exporters_sources == "origin"
  tags: [ 'prometheus_{{ exporter }}' ]

- name: '{{ exporter }} exporter | unarchive'
  unarchive:
    remote_src: yes
    src: /tmp/prometheus_exporter/{{ exporter }}/{{ exporter }}_exporter-{{ prometheus_exporter_latest_version.stdout }}.{{ prometheus_os }}-{{ prometheus_arch }}.tar.gz
    dest: /tmp/prometheus_exporter/{{ exporter }}/
  when: >
    (not stat_result.stat.exists or exporter_upgrade == "yes") and
    prometheus_exporters_sources == "origin"
  ignore_errors: '{{ ansible_check_mode }}'
  tags: [ 'prometheus_{{ exporter }}' ]

- name: '{{ exporter }} exporter | move to /usr/local/bin'
  copy:
    src: /tmp/prometheus_exporter/{{ exporter }}/{{ exporter }}_exporter-{{ prometheus_exporter_latest_version.stdout }}.{{ prometheus_os }}-{{ prometheus_arch }}/{{ exporter }}_exporter
    dest: /usr/local/bin/prometheus-{{ exporter }}-exporter
    remote_src: yes
    owner: root
    group: root
    mode: 0755
  notify:
    - '{{ exporter }}-exporter-restart'
  when: >
    (not stat_result.stat.exists or exporter_upgrade == "yes") and
    prometheus_exporters_sources == "origin"
  tags: [ 'prometheus_{{ exporter }}' ]
  ignore_errors: '{{ ansible_check_mode }}'

- name: '{{ exporter }} exporter | cleanup temp path'
  file:
    state: absent
    path: /tmp/prometheus_exporter/{{ exporter }}
  when: >
    (not stat_result.stat.exists or exporter_upgrade == "yes") and
    prometheus_exporters_sources == "origin"

- name: '{{ exporter }} exporter | systemd | copy unit file'
  template:
    src: systemd/prometheus-{{ exporter }}-exporter.service.j2
    dest: /etc/systemd/system/prometheus-{{ exporter }}-exporter.service
    owner: root
    group: root
    mode: 0600
  notify:
    - '{{ exporter }}-exporter-restart'
  when: not stat_result.stat.exists or exporter_upgrade == "yes"
  ignore_errors: '{{ ansible_check_mode }}'
  tags: [ 'prometheus_{{ exporter }}' ]

- name: '{{ exporter }} exporter | systemd | enable service'
  systemd:
    daemon_reload: yes
    enabled: yes
    name: prometheus-{{ exporter }}-exporter.service
  ignore_errors: '{{ ansible_check_mode }}'
  when: not stat_result.stat.exists or exporter_upgrade == "yes"
  tags: [ 'prometheus_{{ exporter }}' ]