Getting Error: getaddrinfo ENOTFOUND <AppServiceAppName>.scm.<AppServiceEnvironmentName>.appserviceenvironment.net while deploying Azure Functions App in ASE V3 using Azure DevOps CI/CD pipeline.

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Getting Error: getaddrinfo ENOTFOUND <AppServiceAppName>.scm.<AppServiceEnvironmentName>.appserviceenvironment.net while deploying Azure Functions App in ASE V3 using Azure DevOps CI/CD pipeline.

Amit Anand 60

Hi Friends,

Greetings of the day.

I am trying to deploy an Azure Function app using a release pipeline created on Azure DevOps. The function app lies within an App Service Environment V3 within a Virtual Network. My build pipeline runs successfully and created the artifact but when I run the release pipeline, it takes at least 15 mins and finally fails with the following error.

Failed to deploy web package to App Service.

Error: Error: Failed to deploy web package to App Service. Error: getaddrinfo ENOTFOUND <AppServiceName>.scm.<AppServiceEnvironmentName>.appserviceenvironment.net

Solutions I have tried so far.

While going through similar issues / discussions on other forums I found that its related to DNS configuration and referred to the below MS Docs.

https://learn.microsoft.com/en-us/azure/app-service/environment/create-ilb-ase#dns-configuration

Also, I have a Azure Private DNS Zone configured with the record sets as mentioned in the above document and also listed below.

To configure DNS in Azure DNS Private zones:

created an Azure DNS private zone named <ASE name>.appserviceenvironment.net
created an A record in that zone that points * to the ILB IP address
created an A record in that zone that points @ to the ILB IP address
created an A record in that zone that points *.scm to the ILB IP address

Although I don't see anything mentioned in the document about whether the Auto Registration setting of the Azure Private DNS Zone should be enable or disabled, I have kept it off. Even after having this configuration my release pipeline still fails with the same error. Could you please help me and let me know if I am missing anything ? Any help is appreciated.

Thanks and Regards,

Amit Anand

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Answer 1

Ryan Hill 30,281 Microsoft Employee Moderator

Hey @Amit Anand

The use of the DNS zones if for resolving within the VNet your ASE is attached to. You can refer to Connect privately to an App Service apps using private endpoint - Azure App Service | Microsoft Learn, but in order to deploy into that ASE, the agent running your pipeline must also be in that same VNET. The blog post, https://azure.github.io/AppService/2021/01/04/deploying-to-network-secured-sites.html, explains this further. You can either provision a VM in the same VNet or utilize a self-hosted build agent.

Amit Anand 60 Reputation points

2024-03-03T00:31:31.92+00:00

Hi Ryan. Thank you for your response. I checked out the solution on the github link you provided. I have a question though on creating the VM Scale Set. It says when we create the VM scale set it also creates a VNet which is a problem for me as I already have an existing VM. Is it possible to resolve this by only creating the VM in the same VNet and installing the agent in the VM ? Please help.
Ryan Hill 30,281 Reputation points Microsoft Employee Moderator

2024-03-03T00:52:28.1833333+00:00

@Amit Anand yes, you should be able to do that.
Amit Anand 60 Reputation points

2024-03-03T00:56:56.89+00:00

Thanks a lot. I will try and keep you posted about the results.
Amit Anand 60 Reputation points

2024-03-04T03:05:13.43+00:00

Hi @Ryan Hill,
Could you please also tell me about the solution using self-hosted build agent. How do I setup that to deploy the function app in the ASE ?

Thanks and Regards,

Amit Anand
Ryan Hill 30,281 Reputation points Microsoft Employee Moderator

2024-03-05T14:15:49.85+00:00
@Amit Anand you can refer to Azure Pipelines Agents - Azure Pipelines | Microsoft Learn. You have a VM that's associated within your VNet, install the agent on that VM and then configure your Azure DevOps organization to add that agent to an agent pool.

Create a Virtual Machine Scale Set with Ubuntu Server 18.04 LTS. This process will automatically create a VNet as well.

Once the VM Scale Set is created, open Azure DevOps and navigate to Project settings > Pipelines > Agent pools.

Click Add pool and this will open a context menu. Under Pool type select “Azure virtual machine scale set”. Choose your subscription and the VM Scale Set you just created. You can configure the max number of machines for the scale set, the number to keep on standby, and more. Read more information here.

Click Create to set up the agent pool. You can monitor the process under Diagnostics.
Amit Anand 60 Reputation points

2024-03-16T22:22:57.86+00:00

Hi Ryan,

Greetings of the day.

I created a self-hosted agent in a VM inside the same VNet and added that to the agent pools. It worked for me. Really appreciate your help.

Thanks and Regards,

Amit Anand

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Getting Error: getaddrinfo ENOTFOUND <AppServiceAppName>.scm.<AppServiceEnvironmentName>.appserviceenvironment.net while deploying Azure Functions App in ASE V3 using Azure DevOps CI/CD pipeline.

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