---

- name: Ensure directories required
  file:
    dest: '{{ item }}'
    state: directory
  with_items:
    - /etc/netdata
    - /etc/netdata/conf.d
    - /etc/netdata/charts.d
    - /etc/netdata/node.d
    - /etc/netdata/plugins.d
    - /etc/netdata/python.d

- name: Set system hostname as netdata hostname
  copy:
    dest: /etc/netdata/conf.d/netdata.conf
    content: |
      [global]
        hostname = {{ hostname }}
  register: netdata_conf

- name: Set environment variables
  template:
    dest: /etc/netdata/environment
    src: environment.j2
    mode: 0600
  register: configuration

- name: Install netdata systemctl service
  copy:
    dest: /etc/systemd/system/netdata.service
    content: |
      [Unit]
      Description=Netdata metrics daemon
      After=docker.service
      Requires=docker.service

      [Service]
      RemainAfterExit=yes
      TimeoutSec=infinity

      ExecStartPre=/usr/bin/docker pull luzifer/netdata:{{ version }}
      ExecStartPre=-/usr/bin/docker rm -f netdata

      ExecStart=/usr/bin/docker run -d --cap-add SYS_PTRACE \
                                    --security-opt=apparmor:unconfined \
                                    -v /proc:/host/proc:ro \
                                    -v /sys:/host/sys:ro \
                                    -v /etc/netdata:/override:ro \
                                    -v /var/run/docker.sock:/var/run/docker.sock \
                                    -v /var/lib/netdata:/var/lib/netdata \
                                    -p 19999:19999 \
                                    --env-file=/etc/netdata/environment \
                                    --name=netdata \
                                    luzifer/netdata:{{ version }}

      ExecReload=/usr/bin/docker restart netdata

      ExecStop=/usr/bin/docker stop netdata

      [Install]
      WantedBy=multi-user.target
  register: service

- name: Activate netdata service
  systemd:
    daemon_reload: yes
    enabled: yes
    name: netdata.service
    state: restarted
  when: service.changed

- name: Reload configuration when required
  systemd:
    name: netdata.service
    state: reloaded
  when: (configuration.changed or netdata_conf.changed) and not service.changed