Aggregate metrics with the Sensu StatsD listener
StatsD is a daemon, tool, and protocol that you can use to send, collect, and aggregate custom metrics.
Services that implement StatsD typically expose UDP port 8125 to receive metrics according to the line protocol
With StatsD, you can measure anything and everything. Collect custom metrics in your code and send them to a StatsD server to monitor applicaton performance. Monitor CPU, I/O, and network system levels with collection daemons. You can feed the metrics that StatsD aggregates to multiple different backends to store or visualize the data.
Use Sensu to implement StatsD
Sensu implements a StatsD listener on its agents.
sensu-agent listens on the default port 8125 for UDP messages that follow the StatsD line protocol.
StatsD aggregates the metrics, and Sensu translates them to Sensu metrics and events that can be passed to the event pipeline.
You can configure the StatsD listener and access it with the netcat utility command:
echo 'abc.def.g:10|c' | nc -w1 -u localhost 8125
Metrics received through the StatsD listener are not stored in etcd. Instead, you must configure event handlers to send the data to a storage solution (for example, a time-series database like InfluxDB).
NOTE: On Windows machines running Sensu, the StatsD UDP port is not supported. Instead, the TCP port is exposed.
Configure the StatsD listener
Use flags to configure the Sensu StatsD Server when you start up a
The following flags allow you to configure event handlers, flush interval, address, and port:
--statsd-disable disables the statsd listener and metrics server --statsd-event-handlers stringSlice comma-delimited list of event handlers for statsd metrics --statsd-flush-interval int number of seconds between statsd flush (default 10) --statsd-metrics-host string address used for the statsd metrics server (default "127.0.0.1") --statsd-metrics-port int port used for the statsd metrics server (default 8125)
sensu-agent start --statsd-event-handlers influx-db --statsd-flush-interval 1 --statsd-metrics-host "126.96.36.199" --statsd-metrics-port 8125
Now that you know how to feed StatsD metrics into Sensu, check out these resources to learn how to handle the StatsD metrics: