2.4 KiB
Performance Data
When a service check is executed plugins should provide so-called
performance data. Next to that additional check performance data
can be fetched using Icinga 2 runtime macros such as the check latency
or the current service state.
The performance data may be passed to external applications which then generate nice graphs for historical reporting and trending.
Well-known addons processing Icinga performance data are PNP4Nagios, inGraph and Graphite.
Note
As there are no real host checks in Icinga 2, there is no performance data generated for hosts.
Writing Performance Data Files
PNP4Nagios and inGraph use performance data collector daemons to fetch the current performance files for their backend updates.
Therefore the Icinga 2 PerfdataWriter object allows you to define
the output template format backed with Icinga 2 runtime macros.
format_template = "DATATYPE::SERVICEPERFDATA\tTIMET::$TIMET$\tHOSTNAME::$HOSTNAME$\tSERVICEDESC::$SERVICEDESC$\tSERVICEPERFDATA::$SERVICEPERFDATA$\tSERVICECHECKCOMMAND::$SERVICECHECKCOMMAND$\tHOSTSTATE::$HOSTSTATE$\tHOSTSTATETYPE::$HOSTSTATETYPE$\tSERVICESTATE::$SERVICESTATE$\tSERVICESTATETYPE::$SERVICESTATETYPE$",
The default template is already provided with the Icinga 2 feature configuration which can be enabled using
# i2enfeature perfdata
By default all performance data files are rotated in a 15 seconds interval into
the /var/spool/icinga2/perfdata/ directory as service-perfdata.<timestamp>.
External collectors need to parse the rotated performance data files and then
remove the processed files.
Note
If you enable this feature by accident and no collector daemon is processing these files, the filesystem's inodes may run out. Make sure to watch the
localhostservice checkdisksand define your own inode warning and critical thresholds.
Graphite Carbon Cache Writer
While there are some Graphite collector scripts for Icinga 1.x available it's more reasonable to directly process the check and plugin performance in memory in Icinga 2. Once there are new metrics available, Icinga 2 will directly write these to the defined Graphite Carbon daemon tcp socket.
You can enable the feature using
# i2enfeature graphite
The GraphiteWriter object expects the Graphite Carbon Cache socket listening
at 127.0.0.1 on port 2003 by default.
The current naming schema is
icinga.<hostname>.<servicename>.<metricname>