Add a playbook to install Grafana.

playbooks/edx-monitoring.yml

@@ -15,6 +15,8 @@
   gather_facts: True
   roles:
     - graphite
+    - grafana
     - role: nginx
       nginx_sites:
       - graphite
+      - grafana

playbooks/roles/grafana/meta/main.yml

+---
+dependencies:
+  - role: common
+    tags:
+      - always
+  - config-encoders

playbooks/roles/grafana/tasks/main.yml

+---
+#
+# edX Configuration
+#
+# github:     https://github.com/edx/configuration
+# wiki:       https://openedx.atlassian.net/wiki/display/OpenOPS
+# code style: https://openedx.atlassian.net/wiki/display/OpenOPS/Ansible+Code+Conventions
+# license:    https://github.com/edx/configuration/blob/master/LICENSE.TXT
+#
+#
+# Tasks for role graphite
+#
+# Overview:
+#
+# This task is to install Grafana, which is a UI for creating visualizations on top of
+# common metrics data sources such as Graphite, InfluxDB, CloudWatch, and more.
+#
+# Dependencies:
+# - common
+# - config-encoders
+#
+
+- name: ensure correct OS
+  fail:
+    msg: "this playbook can only be run on an Ubuntu host"
+  when: ansible_distribution != "Ubuntu"
+
+- name: install PackageCloud GPG key
+  apt_key:
+    id: "418A7F2FB0E1E6E7EABF6FE8C2E73424D59097AB"
+    url: "https://packagecloud.io/gpg.key"
+    state: present
+  tags:
+    - install
+    - install:system-requirements
+
+- name: install PackageCloud PPA
+  apt_repository:
+    # This is  Debian Jessie repository, when we use Ubuntu Xenial, yes.  It's the latest Debian repository they
+    # populate for their official packages.  It does work, so, *shrug*.
+    repo: "deb https://packagecloud.io/grafana/stable/debian/ jessie main"
+    update_cache: yes
+    state: present
+  tags:
+    - install
+    - install:system-requirements
+
+- name: install grafana
+  apt:
+    name: "{{ grafana_apt_pkg }}"
+    state: present
+  tags:
+    - install
+    - install:system-requirements
+
+- name: configure grafana
+  template:
+    src: "conf/grafana.ini.j2"
+    dest: "/etc/grafana/grafana.ini"
+  tags:
+    - install
+    - install:app-configuration
+
+- name: enable grafana
+  service:
+    name: grafana-server
+    enabled: yes
+    state: started
+  tags:
+    - install
+    - install:configuration
+
+- name: stop grafana
+  service:
+    name: grafana-server
+    state: stopped
+  tags:
+    - manage:stop
+
+- name: restart grafana
+  service:
+    name: grafana-server
+    state: restarted
+  tags:
+    - manage:start
+    - manage:restart

playbooks/roles/grafana/templates/conf/grafana.ini.j2

+{{ grafana_config | encode_ini }}

playbooks/roles/nginx/templates/edx/app/nginx/sites-available/grafana.j2

+{%- if "grafana" in nginx_default_sites -%}
+  {%- set default_site = "default_server" -%}
+{%- else -%}
+  {%- set default_site = "" -%}
+{%- endif -%}
+
+#
+# {{ ansible_managed }}
+#
+
+upstream grafana_app_server {
+  server 127.0.0.1:3000 fail_timeout=0;
+}
+
+server {
+  server_name grafana.*;
+  listen {{ GRAFANA_NGINX_PORT }} {{ default_site }};
+  client_max_body_size 1M;
+  keepalive_timeout 5;
+
+  location / {
+    try_files $uri @proxy_to_app;
+  }
+
+  location @proxy_to_app {
+    {% if NGINX_SET_X_FORWARDED_HEADERS %}
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header X-Forwarded-Port $server_port;
+    proxy_set_header X-Forwarded-For $remote_addr;
+    {% else %}
+    proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
+    proxy_set_header X-Forwarded-Port $http_x_forwarded_port;
+    proxy_set_header X-Forwarded-For $http_x_forwarded_for;
+    {% endif %}
+
+    # newrelic-specific header records the time when nginx handles a request.
+    proxy_set_header X-Queue-Start "t=${msec}";
+
+    proxy_set_header Host $http_host;
+
+    proxy_redirect off;
+    proxy_pass http://grafana_app_server;
+  }
+}

playbooks/roles/nginx/templates/edx/app/nginx/sites-available/graphite.j2

@@ -20,7 +20,6 @@ upstream graphite_app_server {
 }
 
 server {
-
   server_name graphite.*;
   listen {{ GRAPHITE_NGINX_PORT }} {{ default_site }};
   client_max_body_size 1M;