---
- name: Install the Prometheus alertmanager
  tags: ['prometheus', 'prometheus_alertmanager']
  block:
    - name: Create the user under the alertmanager will run
      user:
        name: "{{ prometheus_alert_m_user }}"
        home: "{{ prometheus_alert_m_home }}"
        createhome: false
        shell: /usr/sbin/nologin
        system: true

    - name: Create the prometheus alertmanager base directory
      file:
        dest: "{{ item }}"
        state: directory
        owner: root
        group: root
        mode: 0755
      loop:
        - '{{ prometheus_alert_m_home }}'
        - '{{ prometheus_alert_m_dist_dir }}'

    - name: Create the prometheus alertmanager distribution and data directories
      file:
        dest: "{{ item }}"
        state: directory
        owner: "{{ prometheus_alert_m_user }}"
        group: "{{ prometheus_alert_m_user }}"
        mode: 0700
        recurse: true
      loop:
        - "{{ prometheus_alert_m_home }}"
        - "{{ prometheus_alert_m_data_dir }}"

    - name: Create the prometheus alertmanager config directory
      file:
        dest: "{{ item  }}"
        state: directory
        owner: root
        group: "{{ prometheus_alert_m_user }}"
        mode: 0750
        recurse: true
      loop:
        - "{{ prometheus_alert_m_conf_dir }}"
        - "{{ prometheus_alert_m_conf_dir }}/templates"

    - name: Download the prometheus alertmanager
      get_url:
        url: "{{ prometheus_alert_m_download_url }}"
        dest: /srv/

    - name: Unarchive the prometheus distribution
      unarchive:
        src: "/srv/{{ prometheus_alert_m_file }}"
        dest: "{{ prometheus_alert_m_dist_dir }}"
        remote_src: true
        owner: root
        group: root
      args:
        creates: "{{ prometheus_alert_m_dist_dir }}/{{ prometheus_alert_m_dir }}/alertmanager"
      register: alertmanager_download
      notify: Restart alertmanager

    - name: Copy the binaries under /usr/local/bin
      copy:
        src: "{{ prometheus_alert_m_dist_dir }}/{{ prometheus_alert_m_dir }}/{{ item }}"
        dest: "/usr/local/bin/{{ item }}"
        remote_src: true
        owner: root
        group: root
        mode: 0755
      loop:
        - alertmanager
        - amtool

- name: Install the Prometheus alertmanager systemd unit
  tags:
    - prometheus
    - prometheus_alertmanager
    - alertmanager_conf
    - prometheus_alertmanager_conf
  block:
    - name: Install the prometheus alertmanager systemd unit
      template:
        src: alertmanager.service.j2
        dest: /etc/systemd/system/alertmanager.service
        mode: 0644
        owner: root
        group: root
      register: systemd_reload_required
      notify: Restart alertmanager

    - name: Reload the systemd data
      systemd: daemon_reload=yes
      when: systemd_reload_required is changed

    - name: Ensure that prometheus prometheus_alertmanager is started and enabled
      service:
        name: alertmanager
        state: started
        enabled: true

- name: Install the Prometheus alertmanager configuration
  tags:
    - prometheus
    - prometheus_alertmanager
    - alertmanager_conf
    - prometheus_alertmanager_conf
  when: prometheus_alert_m_install_conf
  block:
    - name: Install the prometheus alertmanager configuration file
      template:
        src: alertmanager.yml.j2
        dest: "{{ prometheus_alert_m_conf_dir }}/alertmanager.yml"
        mode: 0640
        owner: root
        group: "{{ prometheus_alert_m_user }}"
      register: systemd_reload_required
      notify: Reload alertmanager

- name: Remove the alertnamager installation
  tags: [ 'prometheus', 'prometheus_alertmanager' ]
  when: not prometheus_alert_m_install
  block:
    - name: Ensure that prometheus prometheus_alertmanager is stopped and disabled
      service: name=prometheus_alertmanager state=stopped enabled=no
      ignore_errors: True

    - name: Remove prometheus alertmanager upstart script
      file: dest=/etc/init/prometheus_alertmanager.conf state=absent
      when: ansible_service_mgr != 'systemd'

    - name: Remove the prometheus alertmanager systemd unit
      file: dest=/etc/systemd/system/prometheus_alertmanager.service state=absent
      when: ansible_service_mgr == 'systemd'
      register: systemd_reload_required

    - name: Reload the systemd data
      systemd: daemon_reload=yes
      when: systemd_reload_required is changed

- name: Manage the prometheus alertmanager firewalld rules
  when:
    - ansible_distribution_file_variety == "RedHat"
    - firewalld_enabled is defined and firewalld_enabled | bool
  tags: [ 'prometheus', 'prometheus_alertmanager', 'firewall', 'firewalld', 'iptables', 'iptables_rules' ]
  block:
    - name: Manage the prometheus alertmanager firewalld ports
      firewalld: port={{ item.port }}/{{ item.protocol }} zone={{ item.zone }} permanent={{ item.permanent | default(True) }} state={{ item.state }} immediate=True
      with_items: '{{ prometheus_alert_m_firewalld_ports }}'

# Local Variables:
# eval: (ansible-doc-mode 1)
# eval: (add-to-list (quote company-backends) (quote company-ansible))
# eval: (ansible 1)
# End: