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App Service starting new containers - why?

Rodney Tamblyn 0 Reputation points
2024-05-21T04:42:17.4033333+00:00

Hi Azure team:

We have an a web app running in App Service. Recently I have noticed that Azure is replacing container instances frequently (every few hours). I have monitor configured to Alert on health check and scale out operations but am not receiving any notifications. I am also checking locally against our health check endpoint every 5 minutes and have only received 200/healthy replies so it doesn't appear to be health check. I have turned off scale out, but the container replacement continues to happen.

Can you provide any explanation or suggestion of next steps to investigate?

Rodney

Azure App Service
Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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  1. brtrach-MSFT 15,366 Reputation points Microsoft Employee
    2024-05-23T00:11:38.2833333+00:00

    @Rodney Tamblyn There is likely an update going on. App Service works within update zones. Zone 1 will be taken offline to be updated. Any sites in zone 1 will be moved to zones 2-10. If your site was moved to zone 2, it will be moved again upon zone 2 starting its update and so forth.

    Are you experiencing any issues due to the change of instance or are you curious about the cause of the behavior?

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