The no-monitor option for services 编辑

If you use an external system to perform health checks on the services and do not want the Citrix ADC appliance to monitor the health of a service, you can set the no-monitor option for the service. If you do so, the appliance does not send probes to check the health of the service but shows the service as UP. Even if the service goes DOWN, the appliance continues to send traffic from the client to the service as specified by the load balancing method.

The monitor can be in the ENABLED or DISABLED state when you set the no-monitor option, and when you remove the no-monitor option, the earlier state of the monitor is resumed.

You can set the no-monitor option for a service when creating the service. You can also set the no-monitor option on an existing service.

The following are the consequences of setting the no-monitor option:

• If a service for which you enabled the no-monitor option goes down, the appliance continues to show the service as UP and continues to forward traffic to the service. A persistent connection to the service can worsen the situation. In that case, or if many services shown as UP are actually DOWN, the system may fail. To avoid such a situation, when the external mechanism that monitors the services reports a service as DOWN, remove the service from the Citrix ADC configuration.
• If you configure the no-monitor option on a service, you cannot configure load balancing in the Direct Server Return (DSR) mode. For an existing service, if you set the no-monitor option, you cannot configure the DSR mode for the service.

To set the no-monitor option for a new service by using the CLI

At the command prompt, type the following commands to create a service with the health monitor option, and verify the configuration:

add service <serviceName> <IP | serverName> <serviceType> <port> -healthMonitor (YES|NO)
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