HP Insight Cluster Management Utility v7.1 User Guide

Condition
The reaction is performed under this condition.
• ReactOnRaise — Execute the reaction whenever the alert shows as raised and the previous
state of the alert was lowered.
• ReactAlways — Execute the reaction whenever the alert shows as raised, subject to the
alert’s time multiple. For example, if the monitoring has a default timer of 5 seconds and
the alert’s time multiple is 6, the reaction will trigger every 5x6=30 seconds as long as
the alert is raised.
Command
The command to be executed. This can be a single-line shell command, a shell script, or an
executable file. Scripts and executable files must be available on the management node.
The following keywords are supported within the “Command”. Each keyword is substituted
globally (throughout the command line) using the defined values:
CMU_ALERT_NAME
The name of the alert that caused the reaction.
CMU_ALERT_LEVEL
The level of the alert.
CMU_REACT_MESSAGE
The text of the “Description” for this reaction.
CMU_ALERT_NODES
The list of names of all the nodes that raised the alert during the current monitoring pass.
The list is condensed in the form provided by cmu_condense_nodes.
CMU_ALERT_NODES_EXPANDED
The same as CMU_ALERT_NODES only the list is expanded, ordered, and separated by
commas.
CMU_ALERT_VALUES
The list of alert values. This list is comma separated and ordered like the names of
CMU_ALERT_NODES_EXPANDED.
CMU_ALERT_TIMES
The time the alert was triggered on each node. This list is comma separated and ordered
like the names of CMU_ALERT_NODES_EXPANDED.
CMU_ALERT_SEQUENCE_FILE
The path of the HP Insight CMU “sequence” file containing the alerts and alert values from
the monitoring pass that triggered the reaction. Analyze this file with the
/opt/cmu/bin/cmu_monstat command.
NOTE: To protect the management node from large numbers of concurrent reactions, a
reaction will only launch on behalf of compute nodes that do not have previous instances of
the reaction still running. Limit the command runtime of a reaction if the reaction is expected
to be triggered frequently.
5.5.5 Modifying the sensors, alerts, and alert reactions monitored by HP Insight CMU
Several optional sensors, alerts, and alert reactions are commented out in the
ActionAndAlertsFile.txt file.
• Comment a sensor, alert, or alert reaction to stop monitoring it.
• Uncomment a sensor, alert, or alert reaction to start monitoring it.
• Modify a sensor, alert, or alert reaction line to change its parameters.
80 Monitoring a cluster with HP Insight CMU