Deploying a Function App with --deployment-container-image-name can result in a Function App that will not start.

az feedback auto-generates most of the information requested below, as of CLI version 2.0.62

Describe the bug The validation for --deployment-container-image-name can result in a Function App that will start as it sets the LinuxFxVersion correctly.

The linuxFxVersion should be <DockerId>/imagename:tags>

The validation logic at https://github.com/Azure/azure-cli/blob/6c1b085a0910c6c2139006fcbd8ade44006eb6dd/src/azure-cli/azure/cli/command_modules/appservice/custom.py#L1227 doesn’t seem to check this for the Functions scenarios.

To Reproduce

1. Install the newest Az Cli.
2. Create a Storage Account, Resource Group and Managed Identity.
3. Run this command.

az functionapp create --name <appNane> --resource-group <resourceGroupName> \ –storage-account <storageAccountName> \ –plan <planName \ –functions-version 3 \ –runtime python \ –os-type Linux \ –deployment-container-image-name imageName:tags \ –assign-identity <appIdentity>

1. You will see a Function App that is created but has no Functions and returns a Server error.
2. The internal logs show the docker pull is failing/
3. Updating the Linux Fx Version to DockerId/imagename:tags works.

Expected behavior

1. That the Function App starts.

Environment summary Reproduced using the Azure Cloud Shell.

Additional context https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-function-linux-custom-image https://docs.microsoft.com/en-us/azure/app-service/configure-custom-container?pivots=container-linux#change-the-docker-image-of-a-custom-container

[yonzhan]

route to CXP team to help with

[pragnagopa]

@zandym - Thanks for the details. I understand the issue better now. Yes, --deployment-container-image-name command should set the linuxFxVersion and should not require user to run another command.

We will add validation if the image is valid or not on the platform.

We’ve tried both Gitlab and Artifactory registries using the same methodology.

For this - please open an issue on https://github.com/Azure/azure-functions-docker with details on the AppName / appx time range. We need to take a look the logs to understand why other registries are not working.