Agents Administration - Tests
 

Default Parameters for CtxNsLBTest

For each virtual server configured on the NetScaler appliance, this test does the following:

  • Verifies and promptly reports the non-availability / abnormal state of the virtual servers;
  • Continuously monitors the load on the load-balancing virtual servers and reveals how well each server processes client requests;
  • Detects inconsitencies in load-balancing early on;
  • Warns administrators of these deviations proactively;
  • Helps initiate changes in the load-balancing algorithm (if required);

This page depicts the default parameters that need to be configured for the CtxNsLBTest.

  • The TEST PERIOD list box helps the user to decide how often this test needs to be executed.

  • To monitor a NetScaler device, the eG agent should be configured with the credentials of a user with read-only privileges to the target NetScaler device. Specify the credentials of such a user in the NETSCALER USERNAME and NETSCALER PASSWORD text boxes.

  • Confirm the password by retyping it in the CONFIRM PASSWORD text box.

  • The eG agent collects performance metrics by invoking NITRO (NetScaler Interface Through Restful interfaces and Objects) APIs on the target Netscaler device. Typically, the NITRO APIs can be invoked through the HTTP or the HTTPS mode. By default, the eG agent invokes the NITRO APIs using the HTTPS mode. This is why, the SSL flag is set to Yes by default. If the target Netscaler device is not SSL-enabled, then the NITRO APIs can be accessed through the HTTP mode only. In this case, set the SSL flag to No.

  • The default setting of the SHOW UP SERVER ONLY flag is No; this indicates that this test, by default, monitors all the load-balancing virtual servers configured on the NetScaler appliance. If you want the test to monitor only those virtual servers that are up and running currently, then set this value to Yes.

  • By default, SHOW PRIMARY NODE ONLY flag is set to No; this indicates that this test, by default, monitors and report metrics for both primary and secondary nodes in the target environment. If you wish the test to monitor only the primary node, then set this flag to Yes.

  • Provide a comma-separated list of virtual server names or name patterns that need to be excluded from monitoring. By default, the EXCLUDE SERVERS is set to none, indicating that all virtual servers are by default monitored.

  • Once the necessary values have been provided, clicking on the UPDATE button will register the changes made.

When changing default configurations of tests, the values with “$” indicate variables that will be replaced by the eG system according to the specific server being managed - for instance, $hostName is the host/nickname of the target host, $port is the port number of the server being monitored. E.g., for a server xyz:80, $hostName will be changed automatically by the eG manager to “xyz” and $port will be changed to “80” when configuring a test.