We upgraded the azure durable function running in AKS from .net6 to .net8. Everything worked locally.

[40m[32minfo[39m[22m[49m: Host.Startup[0]
      A function allow list has been specified, excluding all but the following functions: [Assist_Start]

{
  "version": "2.0",
  "extensions": {
    "durableTask": {
      "hubName": "AssistTaskHub",
      "storageProvider": {
        "connectionStringName": "AzureWebJobsStorage"
      }
    }
  },
  "functions": [
    "Assist_Start",
    "Assist_Orchestrator",
    "Assist_Complete",
    "Assist_Activation",
    "Assist_Subscription",
    "Assist_SubOrchestrator",
    "Assist_UpdateStatus"
  ],
  "logging": {
    "applicationInsights": {
      "samplingExcludedTypes": "Request",
      "samplingSettings": {
        "isEnabled": true
      }
    }
  }
}

Below is the docker file

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS installer-env
EXPOSE 80
EXPOSE 443
USER root
RUN mkdir -p /home/site/wwwroot
USER dotnet
WORKDIR /home/site/wwwroot
COPY . .
 
 
FROM mcr.microsoft.com/azure-functions/dotnet-isolated:4-dotnet-isolated8.0
USER 0
ENV ASPNETCORE_URLS=http://*:80
ENV AzureWebJobsScriptRoot=/home/site/wwwroot 
    AzureFunctionsJobHost__Logging__Console__IsEnabled=true
COPY --from=installer-env ["/home/site/wwwroot", "/home/site/wwwroot"]

We tried as recommended by MS for what is needed for .net 8 upgrade. The code changes and setting FUNCTIONS_WORKER_RUNTIME to dotnet-isolated. Still the function runtime is not reading any other functions other than the start function