Sun N1 System Manager 1.3 Discovery and Administration Guide

Enabling and Disabling Monitoring

Monitored file system and OS health data for a managed server is not available unless an operating system is deployed on the managed server, and the OS monitoring feature has been installed.

Once the OS monitoring feature is installed on a server, monitoring is enabled by default. For information on installing the OS monitoring feature on a server, see Supporting OS Monitoring.

Use the set server monitored command to enable or disable monitoring. See Enabling and Disabling Monitoring. If the OS monitoring feature is not installed on a server or on every server in a group, using the set server monitored command enables only hardware monitoring for the server or group of servers.

The following graphic shows a section of the Server Details page. The server is powered on, an OS has been installed and the base management and OS monitoring features are supported. Monitoring is enabled for the server.

The graphic shows a section of the Server Details page.
Monitoring shown as enabled; base management and OS monitoring features are
highlighted.

Disabling monitoring by use of the set server monitored command does not remove the monitoring support provided by the OS monitoring feature, which remains installed on the server. However, disabling monitoring by the set server monitored command disables both hardware health and OS health monitoring.

To Monitor a Managed Server or a Managed Server Group

The following procedure describes how to use the command line to enable the monitoring of hardware health and operating system health of a managed server or a group of managed servers Hardware health and OS health monitoring are both enabled with this command, provided that the OS monitoring feature has been installed on the server or the server group. If the OS monitoring feature has not been installed on the managed server or a group of managed servers, then only hardware health monitoring is enabled.

Note –

It can take up to one minute for monitoring to be enabled after running the command in this procedure.

Before You Begin

To enable the management agent IP and security credentials on a managed server named server, add the management features on themanaged server or a group of managed servers as explained in Supporting OS Monitoring.

Steps

Set the monitored attribute to true.
- Use the set server command.
  N1-ok> set server server monitored true
  In this procedure, server is the name of the managed server that you want to monitor.
- For a group of managed servers, set the monitored attribute to true by using the set group command.
  N1-ok> set group group monitored true
  This command is executed for the group of managed servers that you have already named. See set group in Sun N1 System Manager 1.3 Command Line Reference Manual for details. In this procedure, group is the name of the group of managed servers that you want to monitor.

View the details to determine if monitoring is enabled.
- View the managed server details.
  N1-ok> show server server
- For a server group, view the managed server group details to determine if monitoring is enabled for each managed server in the group.
  N1-ok> show group group
Detailed monitoring information appears in the output. Information is displayed about hardware health, OS health and network reachability. OS health monitoring threshold values are also displayed.Monitoring threshold values are explained in Monitoring Threshold Values.

To Disable Monitoring for a Managed Server or a Managed Server Group

The following procedure describes how to use the command line to disable the monitoring of hardware health and operating system health of a managed server or a group of managed servers. Hardware health and OS health monitoring are both disabled with this command, provided that the OS monitoring feature has been added.

Note –

It can take up to one minute for monitoring to be disabled after running the command in this procedure.

You might want to disable monitoring of a hardware component to perform maintenance tasks without generating events.

Steps

Set the monitored attribute to false.
- Use the set server command.
  N1-ok> set server server monitored false
  In this example, server is the name of the managed server that you want to stop monitoring. Executing this command disables monitoring of the server. With monitoring of a managed server disabled, the violation of threshold values by attributes related to that managed server does not generate events.
- For a server group, set the monitored attribute to false by using the set group command.
  N1-ok> set group group monitored false
  This command is executed for the group of managed servers that you have already named. See set group in Sun N1 System Manager 1.3 Command Line Reference Manual for details. In this procedure, group is the name of the group of managed servers for which you want to disable monitoring.

View the details to determine that monitoring is disabled.
- View the managed server details.
  
  The output shows that monitoring is disabled.
  N1-ok> show server server
  If you are not interested in the values of some OS health attributes, you can disable the threshold severity for the monitoring of those attributes, while continuing to monitor other OS health attributes. This action prevents annoyance alarms. Example 6–9 shows how to accomplish this task. For general information about threshold values, see Monitoring Threshold Values. You can also remove the OS health monitoring feature. See To Remove the OS Monitoring Feature.
- For a group of managed servers, view the managed server group details to determine if monitoring is disabled for each managed server in the group.
  N1-ok> show group group

Default States of Monitoring

The default status of monitoring in the Sun N1 System Manager for discovered servers and initialized operating systems is as follows:

Default status of hardware monitoring

When a managed server or other hardware is discovered, monitoring of the managed server or other hardware is enabled by default. Before a manageable server can be monitored, however, it must be discovered and correctly registered with the N1 System Manager. This process is described in Chapter 4, Discovering Manageable Servers. The monitoring of hardware sensors is enabled by default for all managed servers. If a server is deleted and then rediscovered, all states related to that managed server for the purposes of monitoring are lost, regardless of whether monitoring was enabled or disabled for that server when the server was deleted. When the managed server is rediscovered, monitoring is set to true by default. This is true only for servers that were discovered by SP-based discovery.

Default status of OS health monitoring

Disabled by default. When an OS has been successfully provisioned on a managed server and the N1 System Manager management features are supported by using the add server feature command with the agentip specified, OS health monitoring is enabled. The OS provisioning can be performed either through the N1 System Manager or by an external OS installation.

If you are not interested in the values of some OS health attributes, you can disable the threshold severity for the monitoring of those attributes, while continuing to monitor other OS health attributes. This action prevents annoyance alarms. Example 6–9 shows how to accomplish this task. For general information about threshold values, see Monitoring Threshold Values.

Default status of network reachability monitoring

When the management interface of the managed server is discovered, monitoring of the interface is enabled by default. When the management features are added, monitoring of other interfaces is enabled by default.