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服务的无监视器选项

May 11, 2023
投稿者: 
C

如果您使用外部系统对服务执行运行状况检查，并且不希望 NetScaler 设备监视服务的运行状况，则可以为该服务设置无监视选项。如果您这样做，则设备不会发送探测器来检查服务的运行状况，而是将服务显示为 UP。即使服务关闭，设备也会继续按照负载平衡方法的规定将流量从客户端发送到服务。

当您设置无显示器选项时，显示器可能处于启用或禁用状态；当您删除无显示器选项时，显示器的先前状态将恢复。

创建服务时，可以为服务设置无监视选项。您还可以在现有服务上设置无监视器选项。

以下是设置无显示器选项的后果：

  • 如果您启用了无监视选项的服务出现故障，则设备会继续将该服务显示为 UP 并继续将流量转发到该服务。与服务的持续连接可能会使情况恶化。在这种情况下，或者如果显示为 UP 的许多服务实际上是关闭，系统可能会失败。为避免这种情况，当监视服务的外部机制将服务报告为 DOWN 时，将该服务从 NetScaler 配置中删除。
  • 如果在服务上配置无监视器选项，则无法在直接服务器返回 (DSR) 模式下配置负载平衡。对于现有服务，如果设置无监视器选项，则无法为该服务配置 DSR 模式。

使用 CLI 为新服务设置无监视选项

在命令提示符下，键入以下命令以创建带有运行状况监视器选项的服务，然后验证配置：

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

add service nomonsrvc 10.102.21.21 http 80 -healthMonitor no
Done

show service nomonsrvc
nomonsrvc (10.102.21.21:80) - HTTP
State: UP
Last state change was at Mon Nov 15 22:41:29 2010
Time since last state change: 0 days, 00:00:00.970
Server Name: 10.102.21.21
 Server ID : 0 Monitor Threshold : 0
...
Access Down Service: NO
...
Down state flush: ENABLED
Health monitoring: OFF

1 bound monitor:
1) Monitor Name: tcp-default
State: UNKNOWN Weight: 1
Probes: 3 Failed [Total: 3 Current: 3]
Last response: Probe skipped - Health monitoring is turned off.
Response Time: N/A
Done
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使用 CLI 为现有服务设置无监视选项

在命令提示符处，键入以下命令以设置运行状况监视器选项：

set service <name> -healthMonitor (YES|NO)
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示例：

By default, the state of a service and the state of the corresponding monitor are UP.
 >show service LB-SVC1
LB-SVC1 (10.102.29.5:80) - HTTP
State: UP


1) Monitor Name: http-ecv
 State: UP Weight: 1
Probes: 99992 Failed [Total: 0 Current: 0]
Last response: Success - Pattern found in response.
Response Time: 3.76 millisec
Done

When the no-monitor option is set on a service, the state of the monitor changes to UNKNOWN.
set service LB-SVC1 -healthMonitor NO
Done

show service LB-SVC1
LB-SVC1 (10.102.29.5:80) - HTTP
State: UP
Last state change was at Fri Dec 10 10:17:37 2010.
Time since last state change: 5 days, 18:55:48.710
Health monitoring: OFF

1) Monitor Name: http-ecv
   State: UNKNOWN Weight: 1
         Probes: 100028 Failed [Total: 0 Current: 0]
   Last response: Probe skipped - Health monitoring is turned off.
     Response Time: 0.0 millisec
  Done
When the no-monitor option is removed, the earlier state of the monitor is resumed.
> set service LB-SVC1 -healthMonitor YES
Done
>show service LB-SVC1
LB-SVC1 (10.102.29.5:80) - HTTP
State: UP
Last state change was at Fri Dec 10 10:17:37 2010
Time since last state change: 5 days, 18:57:47.880
1) Monitor Name: http-ecv
   State: UP Weight: 1
   Probes: 100029 Failed [Total: 0 Current: 0]
   Last response: Success - Pattern found in response.
   Response Time: 5.690 millisec
   Done
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使用 GUI 为服务设置无监视器选项

  1. 导航到 Traffic Management（流量管理）> Load Balancing（负载平衡）> Services（服务）。
  2. 打开服务，然后清除“运行状况监视”。
服务的无监视器选项
May 11, 2023
投稿者: 
C
May 11, 2023
投稿者: 
C

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