Can't change functions version for Linux App Service Plan app V2 => V3

[mhoeger]

For most function apps, you can change which major version of the functions runtime you run on by the toggle on "Function app settings" (or FUNCTIONS_EXTENSION_VERSION, although Node.js also needs WEBSITE_NODE_DEFAULT_VERSION changed on Windows).

For Linux app service apps, this won't work.

Instead, you need to go to Platform features => Container settings

And then change the image name:

(Ex: mcr.microsoft.com/azure-functions/dotnet:3.0-appservice)

cc: @balag0 @divyagandhii @anirudhgarg

[jongio]

I would very much appreciate a fix for this. It surfaces in Logs as this:

Could not load file or assembly 'System.Text.Json, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.

When using System.Text.Json and it took us a couple of days to figure out what is going on.

Thank you!

[mhoeger]

cc: @dariagrigoriu

[jongio]

@gzuber Should this be resolved with this PR? Azure/azure-cli#12317?

[gzuber]

@jongio That's a good point, thanks.

@mhoeger is this valid since the changes @pragnagopa made to linuxFxVersion?

[pragnagopa]

cc @ankitkumarr
As of ANT86.2, updating 'FUNCTIONS_EXTENSION_VERSION' will update the functions runtime used.

[ankitkumarr]

Yes this is now fixed. Any new function apps that are created, can be upgraded with just the App Setting.