Can we disable the Health check for the for Azure App service if we have elastic premium service plan

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Can we disable the Health check for the for Azure App service if we have elastic premium service plan

Sadanand Khatri 40

Hello,

Can we disable the Health check for the for Azure App service if we have elastic premium service plan ?

VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2023-03-07T09:24:47.66+00:00

@Sadanand Khatri I hope the answer helps. Please let me know if you have any further queries.
Please accept as "Yes" if the answer provided is useful , so that you can help others in the community looking for remediation for similar issues.

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VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2023-03-07T09:24:47.66+00:00

@Sadanand Khatri I hope the answer helps. Please let me know if you have any further queries.
Please accept as "Yes" if the answer provided is useful , so that you can help others in the community looking for remediation for similar issues.

Answer 1

VenkateshDodda-MSFT 25,111 Microsoft Employee Moderator

@Sadanand Khatri Thank you for reaching out to Microsoft Q&A.

By default, when you create a function app running on Elastic Premium plan the health check will be in disabled state only. Yes, If you want you can disable it but please verify if you are using this status check in any of the other component.

To disable Health check, you can go to the Azure portal and select your App Service app. Under Monitoring, select Health check and then select Disable. Please note that disabling Health check may impact the performance of your app.

For more information you can refer to this documentation about the health check feature on App service.

Sadanand Khatri 40 Reputation points

2023-03-01T10:27:01.6+00:00

Thanks for the quick response.

Want to confirm one thing though, Does premium Functions has its own health check mechanism, so there is no need to enable Health check (No need to explicitly enable it from Azure portal)?

In other word even if Health check is disabled (provided that we have elastic premium plan) the platform will automatically manage the health of the instances in the scale set?
Sadanand Khatri 40 Reputation points

2023-03-01T10:29:37.1933333+00:00

Does Azure the platform will automatically manage the health of the instances in the scale set and we don't need to explicitly enable the Health check from Azure portal? (Provided that we have the Elastic premium plan for app service)
Sadanand Khatri 40 Reputation points

2023-03-01T10:29:48.3+00:00

Does Azure the platform will automatically manage the health of the instances in the scale set and we don't need to explicitly enable the Health check from Azure portal? (Provided that we have the Elastic premium plan for app service)
VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2023-03-01T11:11:49.43+00:00

@VenkateshDodda-MSFT Thanks for your follow up questions on this.

Health check feature is to check your application's availability by rerouting requests away from unhealthy instances, and replacing instances if they remain unhealthy. you can take a look here on how the health check works in app service.
By default, Azure platform has its own mechanism to monitor the function app backend instance health check.
Sadanand Khatri 40 Reputation points

2023-03-01T11:24:51.9433333+00:00

@VenkateshDodda-MSFT

Thanks for quick response.

Does Azure the platform will automatically manage the health of the instances in the scale set and we don't need to explicitly enable the Health check from Azure portal? (Provided that we have the Elastic premium plan for app service)
VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2023-03-03T09:12:53.2833333+00:00

@Sadanand Khatri Thanks for your response. I am reconfirming about the above behavior with the internal team and will update you here once I have any updates from them.
VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2023-03-06T08:27:31.6433333+00:00

@Sadanand Khatri I have checked with the team internally and they have confirmed that The Azure Functions platform has its own checks for the health of instances in Consumption and Premium and you can configure the health check to monitor the health instances from your end as well.

Health Check feature is an extra feature that you can use (and need to enable) to also add their own health checks. For example, a snippet from the docs

“For example, if your application depends on a database and a messaging system, the health check endpoint should connect to those components. If the application can't connect to a critical component, then the path should return a 500-level response code to indicate the app is unhealthy.”

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Can we disable the Health check for the for Azure App service if we have elastic premium service plan

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