Add blueprint for the InfluxDB/Grafana Fuel plugin

Change-Id: I82da89139fe83421ba9a827f7237af6ca7923941
Blueprint: influxdb-grafana-fuel-plugin

specs/influxdb-grafana-plugin.rst

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+..
+ This work is licensed under a Creative Commons Attribution 3.0 Unported
+ License.
+
+http://creativecommons.org/licenses/by/3.0/legalcode
+
+===========================================
+Fuel plugin to install InfluxDB and Grafana
+===========================================
+
+https://blueprints.launchpad.net/fuel/+spec/influxdb-grafana-fuel-plugin
+
+InfluxDB [#]_ is an open source, distributed, time series database for storing
+metrics and events.  This plugin will also provide Grafana [#]_, an open
+source, metrics dashboard and graph editor for exploring and visualizing the
+data stored in InfluxDB.
+
+Problem description
+===================
+
+A cloud operator needs a tool to store metrics and visualize them in an
+efficient way.
+
+Proposed change
+===============
+
+We will provide a set of tools that will improve the way we can explore and
+visualize metrics. This solution should be coupled to another one in order to
+collect the metrics. One candidate is the Logging, Monitoring and Alerting
+collector [#]_ plugin. Other potential clients for this plugin are Monasca [#]_
+and Gnocchi [#]_.
+
+Alternatives
+------------
+
+* It might have been implemented as the part of Fuel core but we decided to
+  make it as a plugin for several reasons:
+
+  - This isn't something that all operators may want to deploy.
+
+  - Any new additional functionality makes the project's testing more difficult,
+    which is an additional risk for the Fuel release.
+
+  - Ideally, this effort may be of interest for non-Fuel based deployments, too.
+
+* Use Zabbix.
+
+  - Zabbix stores metrics into a SQL database which doesn't scale well.
+
+  - It offers limited capabilites for querying and displaying the data.
+
+Data model impact
+-----------------
+
+None
+
+REST API impact
+---------------
+
+None
+
+Upgrade impact
+--------------
+
+None
+
+Security impact
+---------------
+
+None
+
+Notifications impact
+--------------------
+
+None
+
+Other end user impact
+---------------------
+
+None
+
+Performance Impact
+------------------
+
+The amount of resources (RAM, CPU, disk) required for InfluxDB depends on the
+number of clients and on the number of collected metrics. Given the youth of
+the InfluxDB project, there are no definitive numbers yet [#]_. As a
+consequence, it is recommended to use a dedicated node for deploying the
+plugin.
+
+Other deployer impact
+---------------------
+
+To be useful the search engine needs to be feed. It can be achieved by other
+Fuel plugins or an ad hoc solution.
+
+Developer impact
+----------------
+
+None
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+
+Primary assignee:
+  Simon Pasquier <spasquier@mirantis.com> (feature lead, developer)
+
+Other contributors:
+  Irina Povolotskaya <ipovolotskaya@mirantis.com> (technical writer)
+  Guillaume Thouvenin <gthouvenin@mirantis.com> (developer)
+  Swann Croiset <scroiset@mirantis.com> (developer)
+
+
+Work Items
+----------
+
+* Implement the InfluxDB Grafana plugin.
+
+* Implement the Puppet manifests.
+
+* Testing.
+
+* Write the documentation.
+
+Dependencies
+============
+
+* Fuel 6.1 and higher.
+
+* It will be installed in an empty role [#]_.
+
+
+Testing
+=======
+
+* Prepare a test plan.
+
+* Test the plugin by deploying environments with all Fuel deployment modes.
+
+* Integration tests with LMA collector.
+
+Documentation Impact
+====================
+
+* Deployment Guide
+
+* User Guide (what features the plugin provides, how to use them in the
+  deployed OpenStack environment).
+
+* Test Plan.
+
+* Test Report.
+
+References
+==========
+
+.. [#] http://www.influxdb.com/
+
+.. [#] http://www.grafana.org/
+
+.. [#] https://blueprints.launchpad.net/fuel/+spec/lma-collector-plugin
+
+.. [#] https://launchpad.net/monasca
+
+.. [#] https://github.com/stackforge/gnocchi
+
+.. [#] http://dieter.plaetinck.be/influxdb-as-graphite-backend-part2.html
+
+.. [#] https://blueprints.launchpad.net/fuel/+spec/blank-role-node