Installation guide

For each Server System MIB variable listed in Table 13–3, code is provided

in the subagent daemon, which accesses the appropriate parameter from

the kernel module through the CFG interface.

13.7.1.2 Monitoring Environmental Thresholds

To monitor the system environment, the envmond daemon is used. You can

customize the daemon by using the envconfig utility or customize the

messages that are broadcast. The following sections discuss the daemon

and utility. For more information, see the envmond and envconfig

reference pages.

13.7.1.2.1 Environmental Monitoring Daemon

By using the Environmental Monitoring daemon, envmond, threshold levels

can be checked and corrective action can ensue before damage occurs to

your system. Then envmond daemon performs the following:

• Queries the system for threshold levels.

• Broadcasts a message to users and provides corrective action when a

high threshold level or redundant power supply failure has been

encountered. When the cooling fan on an AlphaServer 1000A fails, the

kernel logs the error, synchronizes the disks, then powers the system

down. On all other fan failures, a hard shutdown ensues. (Note that

messages can be customized.)

• Notiﬁes users when a high temperature threshold condition has been

resolved.

• Notiﬁes all users that an orderly shutdown is in progress if recovery is

not possible.

To query the system, the envmond daemon uses the base operating system

command /usr/sbin/snmp_request to obtain the current values of the

environment variables speciﬁed in the Server System MIB.

To enable Environmental Monitoring, the envmond daemon must be

started during the system boot, but after the eSNMP and Server System

MIB agents have been started. You can customize the envmond daemon

using the envconfig utility.

13.7.1.2.2 Customizing the envmond Daemon

You can use the envconfig utility to customize how the environment is

queried by the envmond daemon. These customizations are stored in the

/etc/rc.config ﬁle, which is read by the envmond daemon during

startup. Use the envconfig utility to perform the following:

13–28 Administering Events and Errors