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:
az functionapp list-runtimes --os linux --query "[].{stack:join(' ', [runtime, version]), LinuxFxVersion:linux_fx_version, SupportedFunctionsVersions:to_string(supported_functions_versions[])}" --output tableYou are going to get the following table output:
| Stack | LinuxFxVersion | SupportedFunctionsVersions |
|---|---|---|
| dotnet-isolated 8 | DOTNET-ISOLATED | 8.0 |
| dotnet-isolated 7 | DOTNET-ISOLATED | 7.0 |
| dotnet-isolated 6 | DOTNET-ISOLATED | 6.0 |
| dotnet 8 | DOTNET | 8.0 |
| dotnet 6 | DOTNET | 6.0 |
| node 20 | Node | 20 |
| node 18 | Node | 18 |
| python 3.11 | Python | 3.11 |
| python 3.10 | Python | 3.10 |
| python 3.9 | Python | 3.9 |
| python 3.8 | Python | 3.8 |
| python 3.7 | Python | 3.7 |
| java 21.0 | Java | 21 |
| java 17.0 | Java | 17 |
| java 11.0 | Java | 11 |
| java 8.0 | Java | 8 |
| powershell 7.4 | PowerShell | 7.4 |
| powershell 7.2 | PowerShell | 7.2 |
| custom | ["4"] |
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:
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.
