virtualization, the NetScaler appliance can be used to load balance the Web
Interface (WI) servers and Dynamic Desktop Controller (DDC) servers deployed in
the Citrix XenApp and Citrix XenDesktop and environments. The NetScaler
appliance has two built-in monitor types for monitoring the WI servers used in
CITRIX-WEB-INTERFACE monitor can monitor the Web Interface services efficiently
because it monitors a dynamic page at the location specified by the site path.
The monitor checks for critical failures in resource availability.
To mark a service as UP, the appliance expects the following response
from the server:
- For the first GET request,
200 OK .
- For the POST request with
credentials, 302 Found with the required WIAuthID.
- For the last GET request
with session cookie, 200 OK.
Note: If a redirect URL is configured, 302 Found is expected in the first
request before 200 OK.
probes originate from the NetScaler IP (NSIP) address.
When you configure
a CITRIX-WEB-INTERFACE monitor, specify the site path to the location of the
http page that displays the data collected by the monitor. To monitor the
status of the service, in the specified site path, you can view the data
updated dynamically by the monitoring script
Note: End the site
path with a slash (/) to indicate that the monitored resource is dynamic.
When you configure the WI-EXTENDED monitor, when specifying the
site path, do not enter a slash (/) at the end of the path as the software
internally adds a slash at the end of the path. For example, note the following
add monitor wi CITRIX-WI-EXTENDED -sitepath "/Citrix/DesktopWeb" -username aaa -password bbb -domain ccc
CITRIX-WI-EXTENDED monitor verifies the logging process with the Web Interface
service. This monitor accesses the login page and passes the user name,
password, domain, and site path that were specified while configuring the
monitor. It verifies the validity of the login credentials, correct
configuration of the monitor (for example, the site path), and the connection
with the IIS server.
CITRIX-WI-EXTENDED monitor is supported only for the .NET version of the WI
servers. This monitor will not work for the JSP version of the WI servers.
If you use the
wizard for configuring load balancing of the XenDesktop servers, a
CITRIX-WEB-INTERFACE monitor is automatically created and bound to the WI
services. The wizard adds and binds a CITRIX-WEB-INTERFACE monitor by
If you want to add and bind a CITRIX-WI-EXTENDED monitor, select the
Validate Credentials check box and type the
necessary data. If you do not use the wizard, add a monitor corresponding
to the WI services and bind it to each WI service that you create.