---
- name: prom
  hosts:
  - prometheus.guaranteedstruggle.host 
  vars:
    prom_version: '2.55.1'
  gather_facts: yes
  become: yes
  tasks: 

  - name: Ensure group "prometheus" exists
    ansible.builtin.group:
      name:  prometheus
      state: present
  - name: Add user "prometheus"  
    ansible.builtin.user:
      name:   prometheus
      groups: prometheus
      shell: /sbin/nologin
      create_home: no
      append: yes
      comment: "prometheus nologin User"
      state: present 

  - name: Creates directory
    ansible.builtin.file:
      path: /etc/prometheus
      state: directory
      group: prometheus
      owner: prometheus 
  - name: Creates directory
    ansible.builtin.file:
      path: /usr/share/prometheus
      state: directory
      group: prometheus
      owner: prometheus 
  - name: Creates directory
    ansible.builtin.file:
      path: /prometheus-data
      state: directory
      group: prometheus
      owner: prometheus 

  - name: Unarchive a file that needs to be downloaded (added in 2.0)
    ansible.builtin.unarchive:
      src: https://github.com/prometheus/prometheus/releases/download/v{{prom_version}}/prometheus-{{prom_version}}.linux-amd64.tar.gz
      dest: /usr/share/prometheus
      creates: /usr/share/prometheus/prometheus-{{prom_version}}.linux-amd64
      remote_src: yes


  - name: Create a symbolic link
    ansible.builtin.file:
      src: /usr/share/prometheus/prometheus-{{prom_version}}.linux-amd64/prometheus
      dest: /usr/sbin/prometheus
      owner: prometheus
      group: prometheus
      state: link
  - name: Create a symbolic link
    ansible.builtin.file:
      src: /usr/share/prometheus/prometheus-{{prom_version}}.linux-amd64/promtool
      dest: /usr/sbin/promtool
      owner: prometheus
      group: prometheus
      state: link

  - name: Copy prometheus.yaml
    register: prometheus_config_file
    copy:
      src: ../../files/prometheus/prometheus.yaml
      dest: /etc/prometheus/prometheus.yaml 
    notify:
      - reload prometheus
  - name: Copy web-config
    register: web_config_file
    copy:
      src: ../../files/prometheus/web-config.yaml
      dest: /etc/prometheus/web-config.yaml 
    notify:
      - reload prometheus
  - name: Copy rules.yaml
    register: rules_file
    copy:
      src: ../../files/prometheus/rules.yaml
      dest: /etc/prometheus/rules.yaml 
    notify:
      - reload prometheus
  - name: Copy alerts.yaml
    register: alerts_file
    copy:
      src: ../../files/prometheus/alerts.yaml
      dest: /etc/prometheus/alerts.yaml
    notify:
      - reload prometheus

      
  - name: Copy prometheus.service
    register: prometheus_service_file
    copy:
      src: ../../files/prometheus/prometheus.service
      dest: /etc/systemd/system/prometheus.service


  - name: ensure service
    ansible.builtin.systemd_service:
      name: prometheus
      state: started
      enabled: true
      
  # - name: reload service
  #   ansible.builtin.systemd_service:
  #     name: prometheus
  #     state: reloaded
  #   when:
  #   - rules_file.changed
  #   - alerts_file.changed
  #   - prometheus_service_file.changed
  #   - web_config_file.changed

  - name: Just force systemd to reread configs
    ansible.builtin.systemd_service:
      daemon_reload: true
    when: prometheus_service_file.changed



  handlers:
  - name: reload prometheus
    ansible.builtin.systemd_service:
      name: prometheus
      state: reloaded

#### TODO как откатывать неудачную проверку promtool'ом ?