---
# Gather facts from monitored hosts so we can use their IPs on the monitoring server
- name: Gather facts from monitored nodes
  hosts: monitored
  gather_facts: true

- name: Monitored nodes
  hosts: monitored

  vars:
    username: matt
    docker_add_repo: true
    docker_users:
      - "{{ username }}"

  roles:
    - role: geerlingguy.docker
      become: true

  tasks:
    - name: Create node-exporter directory
      ansible.builtin.file:
        path: "{{ ansible_env.HOME }}/node-exporter"
        state: directory
        mode: "0755"

    - name: Copy node-exporter compose file
      ansible.builtin.copy:
        src: node-exporter/compose.yaml
        dest: "{{ ansible_env.HOME }}/node-exporter/compose.yaml"

    - name: Start node-exporter
      community.docker.docker_compose_v2:
        project_src: "{{ ansible_env.HOME }}/node-exporter/"
        state: present

- name: Monitoring server
  hosts: monitoring_server

  vars:
    username: matt
    docker_add_repo: true
    docker_users:
      - "{{ username }}"

  roles:
    - role: geerlingguy.docker
      become: true

  tasks:
    - name: Create monitoring directory
      ansible.builtin.file:
        path: "{{ ansible_env.HOME }}/monitoring"
        state: directory
        mode: "0755"

    - name: Create grafana provisioning directories
      ansible.builtin.file:
        path: "{{ ansible_env.HOME }}/monitoring/grafana/provisioning/{{ item }}"
        state: directory
        mode: "0755"
      loop:
        - datasources
        - dashboards

    - name: Template prometheus config
      ansible.builtin.template:
        src: monitoring/prometheus.yml.j2
        dest: "{{ ansible_env.HOME }}/monitoring/prometheus.yml"
        mode: "0644"

    - name: Copy compose file
      ansible.builtin.copy:
        src: monitoring/compose.yaml
        dest: "{{ ansible_env.HOME }}/monitoring/compose.yaml"

    - name: Copy grafana datasource config
      ansible.builtin.copy:
        src: monitoring/grafana/provisioning/datasources/prometheus.yaml
        dest: "{{ ansible_env.HOME }}/monitoring/grafana/provisioning/datasources/prometheus.yaml"

    - name: Copy grafana dashboard provisioning config
      ansible.builtin.copy:
        src: monitoring/grafana/provisioning/dashboards/dashboards.yaml
        dest: "{{ ansible_env.HOME }}/monitoring/grafana/provisioning/dashboards/dashboards.yaml"

    - name: Fetch Node Exporter Full dashboard from grafana.com
      ansible.builtin.get_url:
        url: "https://grafana.com/api/dashboards/1860/revisions/37/download"
        dest: "{{ ansible_env.HOME }}/monitoring/grafana/provisioning/dashboards/node-exporter-full.json"
        mode: "0644"
        force: false

    - name: Write .env file with secrets
      ansible.builtin.copy:
        content: "GRAFANA_ADMIN_PASSWORD={{ secrets.GRAFANA_ADMIN_PASSWORD }}\n"
        dest: "{{ ansible_env.HOME }}/monitoring/.env"
        mode: "0600"

    - name: Start monitoring services
      community.docker.docker_compose_v2:
        project_src: "{{ ansible_env.HOME }}/monitoring/"
        state: present