Add grafana role

roles/grafana/defaults/main.yaml

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+---
+grafana_package_version:
+grafana_package_name: "grafana{{grafana_package_version}}"
+grafana_package_state: present
+
+grafana_service_name: grafana-server.service
+grafana_service_state: started
+grafana_service_enabled: yes
+
+grafana_etc_path: /etc/grafana
+grafana_config_path: "{{ grafana_etc_path }}/grafana.ini"
+
+grafana_domain: "stats.{{ ansible_domain }}"
+grafana_port: "stats.{{ ansible_domain }}"
+grafana_user: grafana
+grafana_group: grafana
+
+grafana_config:
+  server:
+    domain: "{{ grafana_domain }}"
+    root_url: "https://{{ grafana_domain }}"
+    http_addr: localhost
+    http_port: "{{ grafana_port }}"

roles/grafana/handlers/main.yaml

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+---
+- name: grafana daemon-reload
+  systemd:
+    name: "{{ grafana_service_name }}"
+    daemon_reload: yes
+    state: restarted
+
+- name: restart grafana
+  service:
+    name: "{{ grafana_service_name }}"
+    state: restarted

roles/grafana/tasks/Debian.yaml

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+---
+- name: add grafana apt key
+  apt_key:
+    url: https://packages.grafana.com/gpg.key
+    state: present
+
+- name: configure apt repository
+  apt_repository:
+    repo: "deb https://packages.grafana.com/oss/deb stable main"
+    filename: influxdb
+    update_cache: yes
+    state: present

roles/grafana/tasks/main.yaml

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+---
+- name: gather os specific variables
+  include_vars: "{{ lookup('first_found', possible_files) }}"
+  vars:
+    possible_files:
+      files:
+        - "{{ ansible_distribution }}-{{ ansible_distribution_version }}.yaml"
+        - "{{ ansible_distribution }}.yaml"
+        - "{{ ansible_os_family }}.yaml"
+        - "default.yaml"
+      paths:
+        - vars
+
+- name: include os specific tasks
+  include_tasks: "{{ lookup('first_found', possible_files) }}"
+  vars:
+    possible_files:
+      files:
+        - "{{ ansible_distribution }}-{{ ansible_distribution_version }}.yaml"
+        - "{{ ansible_distribution }}.yaml"
+        - "{{ ansible_os_family }}.yaml"
+        - "default.yaml"
+      paths:
+        - tasks
+
+- name: install package
+  package:
+    name: "{{ grafana_package_name }}"
+    state: "{{ grafana_package_state }}"
+
+- name: "create {{ grafana_etc_path }}"
+  file:
+    path: "{{ grafana_etc_path }}"
+    owner: root
+    group: root
+    mode: 0755
+
+- name: configure
+  template:
+    src: grafana.ini.j2
+    dest: "{{ grafana_config_path }}"
+    owner: root
+    group: "{{ grafana_group }}"
+    mode: 0640
+  notify: restart grafana
+
+- name: manage service
+  service:
+    name: "{{ grafana_service_name }}"
+    state: "{{ grafana_service_state }}"
+    enabled: "{{ grafana_service_enabled }}"
+
+- name: configure nginx
+  include: nginx.yaml
+  when: "'nginx' in ansible_play_role_names"

roles/grafana/tasks/nginx.yaml

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+- name: configure nginx
+  template:
+    src: nginx.conf.j2
+    dest: /etc/nginx/sites-available/grafana
+    owner: root
+    group: root
+    mode: 0644
+  notify: reload nginx
+
+- name: activate site
+  file:
+    src: /etc/nginx/sites-available/grafana
+    dest: /etc/nginx/sites-enabled/grafana
+    owner: root
+    group: root
+    state: link
+  notify: reload nginx

roles/grafana/templates/grafana.ini.j2

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+{%- macro ini_scalar(v) -%}
+{% if v is sameas True or v is sameas False %}
+{{ v | bool | lower }}{% if seq %},{% endif %}
+{% elif v is sameas None %}
+{{ "" }}
+{% else %}
+{{ v }}
+{%- endif %}
+{%- endmacro -%}
+
+{%- macro render_config(config = {}) -%}
+{% for s, sc in config.items() | default({}) %}
+[{{ s }}]
+{% for k, v in sc.items() | default({}) %}
+{{ k }} = {{ ini_scalar(v) }}
+{% endfor %}
+{% endfor %}
+{%- endmacro -%}
+
+# {{ ansible_managed }}
+
+{{ render_config(grafana_config) }}

roles/grafana/templates/nginx.conf.j2

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+server {
+    listen 80;
+{% if ansible_all_ipv6_addresses | length %}
+    listen [::]:80;
+{% endif %}
+    server_name {{ grafana_domain }};
+
+    location /.well-known/acme-challenge/ {
+        root /var/www/.acme-challenge;
+        try_files $uri =404;
+    }
+
+{% if grafana_ssl_enabled is defined and
+      grafana_ssl_enabled %}
+    location / {
+        return 301 https://$server_name$request_uri;
+    }
+{% endif %}
+}
+
+{% if grafana_ssl_enabled is defined and
+      grafana_ssl_enabled %}
+server {
+    listen 443 ssl;
+{% if ansible_all_ipv6_addresses | length %}
+    listen [::]:443 ssl;
+{% endif %}
+    server_name {{ grafana_domain }};
+
+{% if grafana_ssl_certificate is defined %}
+    ssl_certificate {{ grafana_ssl_certificate }};
+{% endif %}
+{% if grafana_ssl_certificate_key is defined %}
+    ssl_certificate_key {{ grafana_ssl_certificate_key }};
+{% endif %}
+{% if grafana_ssl_dhparam is defined %}
+    ssl_dhparam {{ grafana_ssl_dhparam }};
+{% endif %}
+
+    location / {
+        proxy_pass http://localhost:{{ grafana_port }};
+    }
+}
+{% endif %}

roles/grafana/vars/default.yaml

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+---