Device Events Test

In most environments where the NetScaler appliance is deployed, administrators may want to figure out the performance and efficiency of the NetScaler device. If the status of the NetScaler device is up, then they can figure out that the device is operating without a glitch! If the NetScaler device experiences any issues, then the environment may also get affected and administrators may find it diffuclt to load balance the servers sitting in the backend. For an environment to operate without any technical issues, it is the onus of the administrators to continuously monitor the NetScaler device. The Device Events test helps administrators in this regard!

This test scans the syslog file for the events related to the target NetScaler device and reports the number of times the status of the device was up/down/out of service. In addition, this test also helps administrators to identify the number of times the NetScaler system was started/stopped, the number of times the Route6 was up/down and the number of times the ns.conf file was read for configuration information by the NetScaler device. Using this test, administrators can identify if the performance of the NetScaler device is maintained consistently or if any performance degradation is noticed.

For this test to run and report metrics, the NetScaler appliance should be configured to create a Syslog file in a remote Syslog server, where the details of all interactions with the NetScaler appliance will be logged. To know how to configure a remote Syslog server for the use of the NetScaler appliance, refer to Creating a Syslog file in a remote Syslog server topic.

This test is disabled by default. To enable the test, follow the Agents -> Tests -> Enable/Disable menu sequence in the eG administrative interface, pick Citrix NetScaler VPX/MPX as the Component type, select Performance as the Test type, choose this test from the list of disabled tests list, and click on the < button.

Target of the test : A NetScaler VPX/MPX

Agent deploying the test : A remote agent

Outputs of the test : One set of results for the NetScaler appliance being monitored.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

The IP address of the host for which the test is being configured.

Port

The port at which the host listens. By default, this is NULL.

Log File Path

This test reports metrics by parsing a Syslog file. Specify the full path to the Syslog file here.

Search String

By default, the Syslog file may contain information relating to a number of servers that are inter linked with the target NetScaler appliance. In order to obtain the metrics of the target NetScaler appliance alone, specify the hostname or the IP address of the target NetScaler appliance for which the logs are to be read from the syslog file, in the Search String text box. Using this search string the information in the Syslog file may be parsed and metrics may be collected.

Search String Index

Here, specify the cursor position after which the eG agent should search for the specified Search String (or the position up to which the eG agent should ignore while searching for the specified Search String) in the syslog file. For example, if the specified Search String appears in the syslog file at the 17th position, then you may need to specify the Search String as 16.

DD Frequency

Refers to the frequency with which detailed diagnosis measures are to be generated for this test. The default is 1:1. This indicates that, by default, detailed measures will be generated every time this test runs, and also every time the test detects a problem. You can modify this frequency, if you so desire. Also, if you intend to disable the detailed diagnosis capability for this test, you can do so by specifying none against DD Frequency.

Detailed Diagnosis

To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

  • The eG manager license should allow the detailed diagnosis capability
  • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Device down events

Indicates the number of times the NetScaler device was down.

Number

Ideally, the value of this measure should be zero.

Device out of service events

Indicates the number of times the status of the NetScaler device was Out of Service.

Number

 

Device up events

Indicates the number of times the NetScaler device was up.

Number

 

NetScaler system stopped events

Indicates the number of times the NetScaler system was stopped.

Number

 

NetScaler system started events:

Indicates the number of times the NetScaler system was started.

Number

 

CPU started events

Indicates the number of times the CPU of the NetScaler device was started.

Number

 

Route6 down events

Indicates the number of times Route6 was down.

Number

 

Route6 up events

Indicates the number of times Route6 was up.

Number

 

SNMP module started an alarm:

Indicates the number of times an SNMP module started an alert.

Number

An alert will be generally raised when the value of a monitored attribute crosses the threshold value.

SNMP module stopped an alarm

Indicates number of times an SNMP module stopped an alarm.

Number

 

NetScaler started reading configuration Events

Indicates the number of times the NetScaler device has started reading the configuration from ns.conf file (during boot up).

Number

A high value for this measure is a cause of concern as this may indicate that the NetScaler device is either corrupted or is often restarting.

NetScaler completed reading configuration Events

Indicates the number of times the NetScaler device has completed reading the configuration from ns.conf file (during boot up).

Number