Red Hat ENTERPRISE LINUX 4.5.0 - Guía de usuario descargar pdf (Pagina 64)

OS Stall Monitoring by using OpenIPMI

This section explains OS Stall Monitoring by using OpenIPMI.

F u n c t i o n s

You can monitor OS Stall condition by regularly updating watchdog timer (timer for software stall monitoring)

mounted machine. In case there is no response due to OS stall or, timer is not updated or other reasons,

Watchdog timer expires and the system reboot automatically.

Note

Confirm the movement situation of OpenIPMI by all means before setting this

chapter. Because it uses a server management driver for OS stall monitoring when

"mainte" is displayed by lsmod command, it is not necessary to set this chapter.

S e t t i n g s

You can set timeout period, update interval, action after timeout. The parameter is as follows.

Timeout Period: timeout

Period Value in which whether OS stall generation is judged. You can set it in number of seconds.

Default Value is 60 seconds. It is possible to be set from 10 seconds.

You can set it in /etc/sysconfig/ipmi

Action after Timeout: action

You can select how to restore after timeout.

Default Value is reset. You can set it in /etc/sysconfig/ipmi

none

It is not restored.

reset

Reset system and try to reboot.

power_off

System power is shut down.

power_cycle

First power OFF and power ON just after that.

Update Interval: interval

Interval value which timer update. You can set it in number of seconds.

Default Value is 10 seconds. It is possible to be set within 1-59 seconds.

You can set it in /etc/watchdog.conf

Important

By the system load situation of the machine, Even if OS is not a state of the

stall, watchdog timer can not be updated, so there is a possibility that the

time-out is generated. After it evaluates it in the state of a high load in the

system requirements, set the stall monitoring.

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Red Hat ENTERPRISE LINUX 4.5.0 - Guía de usuario Pagina 64