Azure Functions isolated .net 8 serving content URL for Time Triggered and Service Bus triggered functions(Working fine with .Net6)

[rahul-neudesic]

We have service bus triggered functions and Time triggered functions which we have moved to Azure Kubernetes workloads was working fine with .Net6

After moving to .Net 8 isolated worker function we are seeing below logs on container ->

Hosting environment: Production
Content root path: /azure-functions-host
Now listening on: http://[::]:5000
Application started. Press Ctrl+C to shut down.

As part of moving to .net8 we have made below updates

csProj Changes

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
    <OutputType>Exe</OutputType>
    <ImplicitUsings>enabled</ImplicitUsings>
    <Nullable>enable</Nullable>
    <FunctionsEnableWorkerIndexing>false</FunctionsEnableWorkerIndexing>
    <ErrorOnDuplicatePublishOutputFiles>false</ErrorOnDuplicatePublishOutputFiles>
  </PropertyGroup>
 
  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="1.20.1" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.1.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Timer" Version="4.3.1" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="1.16.4" />
    <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.21.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="1.1.0" />
  </ItemGroup>
  <ItemGroup>
    <Using Include="System.Threading.ExecutionContext" Alias="ExecutionContext" />
  </ItemGroup>

Docker File -

FROM mcr.microsoft.com/dotnet/sdk:8.0-preview AS installer-env

ARG BUILD_CONFIGURATION=Release
ARG user=appuser
ARG group=appuser
ARG uid=1000
ARG gid=1000
RUN addgroup --gid 1000 myusergroup && adduser --uid 1000 --ingroup myusergroup myuser
WORKDIR /src
COPY ["nuget.config", "."]
COPY ["src/Functions/Function.csproj", "src/Functions/FunctionName/"]
ARG FEED_URL
ARG PAT
ENV COMPlus_EnableDiagnostics=0
# download and install latest credential provider.
RUN wget -qO- https://aka.ms/install-artifacts-credprovider.sh | bash


# Optional: Sometimes the http client hangs because of a .NEt issue. Setting this in dockerfile helps 
ENV DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER=0


RUN dotnet restore "./src/Functions/Function.csproj" -s ${FEED_URL} -s https://api.nuget.org/v3/index.json --configfile "nuget.config"
COPY . .
WORKDIR "/src//Functions/Function"
RUN dotnet build "./Function.csproj" -c $BUILD_CONFIGURATION -o /app/build
 
FROM installer-env AS publish
ARG BUILD_CONFIGURATION=Release
RUN dotnet publish "./Function.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false

FROM mcr.microsoft.com/azure-functions/dotnet-isolated:4-dotnet-isolated8.0 AS base
WORKDIR /home/site/wwwroot
COPY --from=publish /app/publish .

# To enable ssh & remote debugging on app service change the base image to the one below
# FROM mcr.microsoft.com/azure-functions/dotnet-isolated:4-dotnet-isolated8.0-appservice
FROM base
ENV AzureWebJobsScriptRoot=/home/site/wwwroot \
    AzureFunctionsJobHost__Logging__Console__IsEnabled=true

[bhagyshricompany]

thanks for reporting please share the func name,timestamp ,region and share the repro steps.Thanks

[rahul-neudesic]

thanks for reporting please share the func name,timestamp ,region and share the repro steps.Thanks

FuncName -

public class ServiceBusFunction

{
   

    [Function("ServiceBusFunction")]
    public void Run([TimerTrigger("0/10 * * * * *")] TimerInfo myTimer)
    {
        Console.WriteLine("Worker function");
    }
}

Region - west US2
Repro steps -

Create a .Net8 based isolated time trigger function.
Create docker file and push to ACR
Pull image from ACR and deploy to AKS container
You will see the message -
Hosting environment: Production
Content root path: /azure-functions-host
Now listening on: http://[::]:5000
Application started. Press Ctrl+C to shut down.

[bhagyshricompany]

@kshyju please comment.Thanks

[kshyju]

@rahul-neudesic Can you elaborate what specifically is not working and what is your expected behavior? Please update the post and title to reflect it as needed.

[anupamk1506]

@kshyju We are facing similar issue and function is not able to startup. We have raised an issue for this Azure/azure-functions-host#10413 but our function inproc instead of isolated model. Please let me know if you require more information?