The parameter LinuxFxVersion has an invalid value

The error “The parameter LinuxFxVersion has an invalid value” can be one of those challenging Bicep/ARM errors, that can consume some time until you figure it out. I hope I can alleviate some pain with this post.

Before anything else

Open the command line and run this:

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az functionapp list-runtimes --os linux --query "[].{stack:join(' ', [runtime, version]), LinuxFxVersion:linux_fx_version, SupportedFunctionsVersions:to_string(supported_functions_versions[])}" --output table

You are going to get the following table output:

Make sure that the value you reference on your Bicep/ARM file is available on LinuxFxVersion.

Still facing the issue?

So your Bicep/ARM is probably not compliant. If you want to eliminate any other dramas, use one of these quickstart templates:

https://github.com/Azure/azure-quickstart-templates/tree/master/quickstarts/microsoft.web

If you are trying to deploy an Azure Functions on Linux Consumption, here is a great example:

https://github.com/Azure/azure-quickstart-templates/tree/master/quickstarts/microsoft.web/function-app-linux-consumption

Please feel free to add comments on your specific issues or findings so that I can cover more ground with other troubleshooting scenarios. This is going to be a living document.