Backend integrity personal

Question

Hi,

Microsoft says that the verification time for backup servers occurs every 30 s and is removed from the pool.

If I want to reduce this time to the shortest possible, I must create a custom integrity investigation rule, correct?

But I want to create a rule that works for any listener. I have several listeners in all 25.

Or do I need to create one for each listener?

I noticed that when selecting (Yes) Choose the hostname of the backend HTTP settings it disables (HTTP Settings).

I didn't understand what I should configure for my scenario with multisites and if these times will help me or may cause a problem.

Thank you.

Answer 1

Hello @Salves ,

From your screenshot, I understand that you are trying to change the Probe intervals for your Application gateway.
The default health monitoring tests the backend servers every 30 seconds for a healthy HTTP response with a 30 second timeout for each request. And it is not recommended to set the lower than 30 seconds. But if you would still like to reduce the probe interval, you can do so by creating a custom probe.

Custom probe should be associated with the HTTP setting(s) which will monitor the health of that backend pool which is associated with the selected HTTP setting. It will use the same port for the probe request as the one being used in the selected HTTP setting. You can only choose those HTTP setting(s) which are not associated with any other custom probe.
Note that only those HTTP setting(s) are available for association which have the same protocol as the protocol chosen in the probe configuration and have the same state for the Pick Host Name From Backend HTTP setting switch.

Hence, in case of multiple hostnames, you need to create multiple custom probes which matches the respective HTTP setting.

For more information, please refer the below articles:
https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-probe-overview
https://learn.microsoft.com/en-us/azure/application-gateway/application-gateway-create-probe-portal

Hope this helps!

Kindly let us know if the above helps or you need further assistance on this issue.

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