add the ansible playbooks for the monitoring stack

ansible/roles/grafana/tasks/main.yml

@@ -0,0 +1,77 @@
+---
+- name: Add Grafana APT key
+  ansible.builtin.get_url:
+    url: https://apt.grafana.com/gpg.key
+    dest: /etc/apt/keyrings/grafana.asc
+    mode: "0644"
+
+- name: Add Grafana APT repository
+  ansible.builtin.apt_repository:
+    repo: "deb [signed-by=/etc/apt/keyrings/grafana.asc] https://apt.grafana.com stable main"
+    state: present
+    filename: grafana
+
+- name: Install Grafana
+  ansible.builtin.apt:
+    name: grafana
+    state: present
+    update_cache: true
+  notify: Restart grafana
+
+- name: Create Grafana provisioning directories
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    owner: grafana
+    group: grafana
+    mode: "0755"
+  loop:
+    - /etc/grafana/provisioning/datasources
+    - /etc/grafana/provisioning/dashboards
+    - /var/lib/grafana/dashboards
+
+- name: Deploy Grafana datasources
+  ansible.builtin.template:
+    src: datasources.yml.j2
+    dest: /etc/grafana/provisioning/datasources/datasources.yml
+    owner: grafana
+    group: grafana
+    mode: "0640"
+  notify: Restart grafana
+
+- name: Deploy Grafana dashboard provisioning
+  ansible.builtin.template:
+    src: dashboards.yml.j2
+    dest: /etc/grafana/provisioning/dashboards/dashboards.yml
+    owner: grafana
+    group: grafana
+    mode: "0640"
+  notify: Restart grafana
+
+- name: Deploy default dashboards
+  ansible.builtin.copy:
+    src: "{{ item }}"
+    dest: /var/lib/grafana/dashboards/
+    owner: grafana
+    group: grafana
+    mode: "0644"
+  loop: "{{ lookup('fileglob', 'files/dashboards/*.json', wantlist=True) }}"
+  notify: Restart grafana
+  ignore_errors: true  # OK if no dashboards yet
+
+- name: Configure Grafana
+  ansible.builtin.lineinfile:
+    path: /etc/grafana/grafana.ini
+    regexp: "{{ item.regexp }}"
+    line: "{{ item.line }}"
+    state: present
+  loop:
+    - { regexp: '^;?http_port', line: 'http_port = 3000' }
+    - { regexp: '^;?http_addr', line: 'http_addr = 0.0.0.0' }
+  notify: Restart grafana
+
+- name: Enable and start Grafana
+  ansible.builtin.systemd:
+    name: grafana-server
+    enabled: true
+    state: started