By Matt Massie, Bernard Li, Brad Nicholes, Vladimir Vuksan
ISBN-10: 1449329705
ISBN-13: 9781449329709
Written by means of Ganglia designers and maintainers, this e-book exhibits you the way to gather and visualize metrics from clusters, grids, and cloud infrastructures at any scale. are looking to music CPU usage from 20,000 hosts each ten seconds? Ganglia is simply the instrument you wish, when you know the way its major elements interact. This hands-on e-book is helping skilled process directors benefit from Ganglia 3.x.
Learn the way to expand the bottom set of metrics you gather, fetch present values, see mixture perspectives of metrics, and detect time-series tendencies on your facts. You’ll additionally study real-world case reviews of Ganglia installs that characteristic tough tracking requirements.
* be sure even if Ganglia is an effective healthy to your atmosphere
* find out how Ganglia’s gmond and gmetad daemons construct a metric assortment overlay
* Plan for scalability early on your Ganglia deployment, with necessary information and suggestion
* Take info visualization to a brand new point with gweb, Ganglia’s net frontend
* Write plugins to increase gmond’s metric-collection strength
* Troubleshoot concerns you'll come across with a Ganglia deploy
* combine Ganglia with the sFlow and Nagios tracking platforms
Contributors contain: Robert Alexander, Jeff Buchbinder, Frederiko Costa, Alex Dean, Dave Josephsen, Peter Phaal, and Daniel Pocock.
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Extra info for Monitoring with Ganglia
Example text
Graphite support. It is possible to export all the metrics collected by gmetad to Graphite, an external open source metrics storage and visualization tool, by setting the following attributes. Configuring Ganglia | 37 carbon_server (address) The hostname or IP of a remote carbon daemon. carbon_port (number) The carbon port number, which defaults to 2003. gmetad, so Graphite will organize them appropriately. carbon_timeout (number) The number of milliseconds gmetad will wait for a response from the Graphite server.
5. Work up the hierarchy starting any other gmetad instances. 6. Start the Apache web servers. Web servers are started after gmetad; otherwise, the PHP scripts can’t contact gmetad and the users see errors about port 8652. Remember rrdcached If gmetad is configured to use rrdcached, it is essential for rrdcached to be running before gmetad is started. Testing Your Installation gmond and gmetad both listen on TCP sockets for inbound connections. To test whether gmond is operational on a given host, telnet to gmond’s TCP port: user@host:$ telnet localhost 8649 In reply, gmond should output an XML dump of metric data.
If a new machine running gmond is added to a cluster, it needs to announce itself and inform all other nodes of the metrics that it currently supports. In multicast mode, this isn’t a problem, because any node can request the metadata of all other nodes in the cluster. However, in unicast mode, a resend interval must be established. The interval value is the minimum number of seconds between resends. module_dir (path; optional) Indicates the directory where the metric collection modules are found.
Monitoring with Ganglia by Matt Massie, Bernard Li, Brad Nicholes, Vladimir Vuksan
by Steven
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