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Charm: ganglia
Summary
Ganglia monitoring server
Charm Store
juju deploy cs:precise/ganglia-3
Maintainer
Mark Mims
Series
precise
Description
Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids. . This charm should be used with the ganglia-node charm to deploy Ganglia for monitoring of other services.
Links
Repository   Bugs
lp:~charmers/charms/precise/ganglia/trunk
Hooks
Interfaces
Provides
Requires
Config
gridname string
dead_host_timeout int
key string
source string
Details
Readme
Overview
========

Quote:

"Ganglia is a scalable distributed monitoring system for high-performance computing
 systems such as clusters and Grids. It is based on a hierarchical design targeted
 at federations of clusters. It leverages widely used technologies such as XML for
 data representation, XDR for compact, portable data transport, and RRDtool for data
 storage and visualization. It uses carefully engineered data structures and
 algorithms to achieve very low per-node overheads and high concurrency. The
 implementation is robust, has been ported to an extensive set of operating systems
 and processor architectures, and is currently in use on thousands of clusters around
 the world. It has been used to link clusters across university campuses and around
 the world and can scale to handle clusters with 2000 nodes."

In short - it monitors stuff and scales really well.

Usage
=====

This charm and is subordinate peer - ganglia-node - support using ganglia in a
couple of different ways.

Small
-----

For small deployments, use of a single 'master' head server may be sufficient:

   juju deploy ganglia
   juju deploy ganglia-node
   juju add-relation ganglia:node ganglia-node:node
   juju deploy mysql
   juju deploy memcached
   ...
   juju add-relation ganglia-node mysql
   juju add-relation ganglia-node memcached
   juju expose ganglia

Ganglia will start reporting metrics about deployed services::

   http://<IP of ganglia service unit>/ganglia

Large
-----

For larger deployments which require more scalability, its possible to leverage
the hierarchical nature of ganglia to build up resilience and better scale:

   juju deploy ganglia
   juju deploy ganglia mysql-ganglia-cluster
   juju deploy ganglia memcached-ganglia-cluster
   juju deploy ganglia-node ganglia-node-mysql
   juju deploy ganglia-node ganglia-node-memcached
   juju add-relation ganglia:master mysql-ganglia-cluster:head
   juju add-relation ganglia:master memcached-ganglia-cluster:head
   juju add-relation mysql-ganglia-cluster:node ganglia-node-mysql:node
   juju add-relation memcached-ganglia-cluster:node ganglia-node-memcached:node
   juju deploy mysql
   juju deploy -n XX memcached
   juju add-relation ganglia-node-mysql mysql
   juju add-relation ganglia-node-memcached memcached
   juju expose ganglia

The XX-ganglia-cluster service units will receive data from all services associated
with ganglia-node deployments, leaving the main ganglia service to cope with the web
interface and report generation.
Changes  
2012/10/04 James Page Switch endpoint/datasource handling to ensure that gmond's opt in to acting as a datasource (revno 28)
2012/10/04 James Page Removed attempt to classify sub-services as this approach does not work (revno 27)
2012/10/04 James Page Refactors utils into separate package (revno 26)
2012/10/03 James Page Rework to fix poor install hook handling so everything is in python (revno 25)
2012/10/03 James Page Updates to support better rollups and add docs to support usage (revno 24)
2012/10/02 James Page Refactoring (revno 23)
2012/05/29 Mark Mims maintainer (revno 22)
2012/04/17 Mark Mims use the repo (revno 21)
2011/11/20 Mark Mims revision (revno 20)
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