Add initial simple Grafana role

monitoring.yml

+# Install and configure Prometheus and Grafana for angel system etc.
+# monitoring
+
+- name: install and configure Prometheus and Grafana
+  hosts: monitoring
+  become: yes
+  roles:
+   - grafana

roles/grafana/defaults/main.yml

+grafana_listen_address: "127.0.0.1"
+grafana_public_access: true

roles/grafana/handlers/main.yml

+- name: restart Grafana
+  systemd:
+    name: "grafana-server"
+    state: restarted

roles/grafana/tasks/main.yml

+- name: add Grafana key
+  apt_key:
+    data: '{{ lookup("file", "grafana.key") }}'
+    state: present
+
+- name: add Grafana repo
+  apt_repository:
+    repo: "deb https://packages.grafana.com/oss/deb stable main"
+    state: present
+    update_cache: yes
+
+- name: install Grafana
+  apt:
+    package: grafana
+    state: present
+
+- name: enable Grafana
+  systemd:
+    name: "grafana-server"
+    enabled: yes
+
+- name: configure Grafana
+  template:
+    src: "grafana.ini.j2"
+    dest: "/etc/grafana/grafana.ini"
+    owner: root
+    group: grafana
+    mode: 0640
+  notify: restart Grafana

roles/grafana/templates/grafana.ini.j2

+# {{ ansible_managed }}
+
+[server]
+http_addr = {{ grafana_listen_address }}
+
+{% if grafana_public_access %}
+[auth.anonymous]
+enabled = true
+org_name = Heaven
+org_role = Viewer
+{% endif %}