Azure app service Linux container down for 3 hours, wont start and github deployment broken

Question

Azure app service Linux container down for 3 hours, wont start and github deployment broken

Steven Monk 35

The last three hours app service has been down, says started but even kudo is failing with 503, I have had nothing but issues with stability and github deployments since this sidecar features was enabled. I don't want or need Sidecar. There is no documentation on how to reconfigure Github or how to turn off sidecar. it took me 12 hours to get deployments working again through trial and error. Copilot knows nothing about it. i'm spending 90% of my time fighting with App service deployments and startups since that feature was forced on me, it will work fine for 24 hours then just break again, i have even completely deleted the whole config in Azure, rebuilt and that didn't help either problems start again after a few hours. Its still down now

1 answer

Your answer

Answer 1

Kantamsetti Aslesha 330 Microsoft External Staff

Hi @Steven Monk

Thank you for reaching out to Microsoft Q&A!

While creating Azure Web App you can disable the SideCar support as shown below:

2025-03-07 17_22_43-Create Web App - Microsoft Azure and 16 more pages - Work - Microsoft Edge After disabled Sidecar support you can find GitHub support in Azure.

2025-03-07 17_36_23-kaweb6 - Microsoft Azure and 18 more pages - Work - Microsoft Edge

Another option for deploying your image to Azure App Service is to use Azure Container Registry (ACR). You can push your image from GitHub to ACR and then link it to Azure App Service for deployment.

Refer this Ms docs to know more about sidecar support in Azure.

https://learn.microsoft.com/en-us/azure/app-service/tutorial-sidecar?tabs=portal

https://azure.github.io/AppService/2025/03/06/Sidecars-Deep-Dive-Part1.html

https://techcommunity.microsoft.com/blog/appsonazureblog/announcing-the-general-availability-of-sidecar-extensibility-in-azure-app-servic/4267985

Hope this helps.

If the answer is helpful, please click Accept Answer and kindly upvote it. If you have any further questions about this answer, please click Comment.

Kantamsetti Aslesha 330 Reputation points Microsoft External Staff

2025-03-10T05:02:22.1366667+00:00
Hi @Steven Monk

I wanted to follow up and check if you were able to resolve the issue with your Azure App Service. If you're still experiencing downtime or deployment failures, could you share any specific error messages from the logs?

Additionally, if you haven't already, you might try the following:

Manually disabling Sidecar support: If the Sidecar feature is causing instability, you can try redeploying the app with Sidecar explicitly disabled during creation.

Reviewing Kudu logs: Even though Kudu is failing with a 503, you can check deployment logs via az webapp log tail or by connecting via SSH (az webapp ssh).

Switching to Azure Container Registry (ACR): If GitHub deployments remain unreliable, pushing your image to ACR and linking it to App Service might offer better stability.
Kantamsetti Aslesha 330 Reputation points Microsoft External Staff

2025-03-11T05:09:34.92+00:00

Hi @Steven Monk
I just wanted to follow up and check if you were able to resolve the issue with our Sidecar feature. If you're still facing problems, please share more details.

Let me know how I can assist further!

Share via

Azure app service Linux container down for 3 hours, wont start and github deployment broken

1 answer

Your answer