Dockerized .NET 5 (dotnet-isolated) function does not run when triggered

[nachiappannk]

• .NET 5 (dotnet-isolated) function with Http Trigger (and Service Bus also) when dockerized and deployed Azure, the function is not run when triggered.
• The issue is observed when using Microsoft.Azure.Functions.Worker version 1.4.0
• The issue is resolved when downgrading the package Microsoft.Azure.Functions.Worker version 1.0.0

Steps to reproduce the issue

Prerequisites

• Azure Cli is installed
• Docker is installed
• Docker Login is completed to a public registry (docker login)
• Azure cli login is completed (az login)
• Adjust the names to avoid conflict in the below commands
• Clone the repository https://github.com/nachiappannk/azure-function-bug

Run the below commands from root of repo after logging in to azure (az login) and docker (docker login)

• docker build -t nachiappan/function-issue-demo:bug .
• docker push nachiappan/function-issue-demo:bug
• az group create --name NachiFuncDemo --location westeurope
• az storage account create --name nachistoragedemoforfunc --location westeurope --resource-group NachiFuncDemo --sku Standard_LRS
• az functionapp plan create -g NachiFuncDemo -n FunctionAppPlan --sku EP1 --is-linux true
• az functionapp create --name nachifunctionissuedemo --storage-account nachistoragedemoforfunc --resource-group NachiFuncDemo -p FunctionAppPlan --functions-version 3 --runtime dotnet-isolated --deployment-container-image-name docker.io/nachiappan/function-issue-demo:bug

Reach the URL

• Hit the url in a browser https://nachifunctionissuedemo.azurewebsites.net/api/HttpTriggeredFunction?

Expected

• The page loads with message "Welcome to Azure Functions!"

Actual

• The page does not load

Work around

• In the file func-tool-bug.csproj downgrade the version of Microsoft.Azure.Functions.Worker to 1.0.0
• docker build with docker build -t nachiappan/function-issue-demo:nobug .
• docker push with docker push nachiappan/function-issue-demo:nobug
• update the docker image with az functionapp create --name nachifunctionissuedemo --storage-account nachistoragedemoforfunc --resource-group NachiFuncDemo -p FunctionAppPlan --functions-version 3 --runtime dotnet-isolated --deployment-container-image-name docker.io/nachiappan/function-issue-demo:nobug

Other Observation

• Functions build with 1.4.0 of Microsoft.Azure.Functions.Worker
  • works with locally running docker
  • works deploying to azure with out docker
  • works locally running as a console application
  • DOES NOT WORK when dockerized and deployed to azure function
• Kudu logs indicate there is a problem with HTTP protocol when trying to make a GRPC call

[brettsam]

I believe you're hitting the same issue as #524. Can you try the workaround there and see if that fixes it?