Citrix Systems 6 manual Customizing Alerts, Valid VM Elements

The following alerts appear on the performance graphs in XenCenter. See the XenCenter online help for more information:

•vm_cloned

•vm_crashed

•vm_rebooted

•vm_resumed

•vm_shutdown

•vm_started

•vm_suspended

Customizing Alerts

Note:

Triggers for alerts are checked at a minimum interval of five minutes (this avoids placing excessive load on the system to check for these conditions and reporting of false positives); setting an alert repeat interval smaller than this will result in the alerts still being generated at the five minute minimum interval.

The performance monitoring perfmon runs once every 5 minutes and requests updates from XenServer which are averages over 1 minute, but these defaults can be changed in /etc/sysconfig/perfmon.

Every 5 minutes perfmon reads updates of performance variables exported by the XAPI instance running on the same host. These variables are separated into one group relating to the host itself, and a group for each VM running on that host. For each VM and also for the host, perfmon reads in the other-config:perfmonparameter and uses this string to determine which variables it should monitor, and under which circumstances to generate a message.

vm:other-config:perfmon and host:other-config:perfmon values consist of an XML string like the one below:

<config>

<variable>

<name value="cpu_usage"/>

<alarm_trigger_level value="LEVEL"/> </variable>

<variable>

<name value="network_usage"/>

<alarm_trigger_level value="LEVEL"/> </variable>

</config>

Valid VM Elements

name

what to call the variable (no default). If the name value is one of cpu_usage, network_usage, or disk_usage the rrd_regex and alarm_trigger_sense parameters are not required as defaults for these values will be used.

alarm_priority

the priority of the messages generated (default 5)

alarm_trigger_level

level of value that triggers an alarm (no default)

alarm_trigger_sense

high if alarm_trigger_level is a maximum value otherwise low if the alarm_trigger_level is a minimum value. (default high)

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