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Docker Container for .NET 8 Web API Fails When Deployed to Azure Container Registry (ACR)

I’m working on a .NET 8 web api and using Docker to containerize it. The app works on my local machine, but fails when deployed to ACR. Before that I was running the app on .NET 7, and there were no issues with deploying it to ACR.

Dockerfile:

FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
WORKDIR /src
COPY ["MyProject.API/MyProject.API.csproj", "MyProject.API/"]
COPY ["MyProject.Core/MyProject.Core.csproj", "MyProject.Core/"]
COPY ["MyProject.Models/MyProject.Models.csproj", "MyProject.Models/"]
RUN dotnet restore "MyProject.API/MyProject.API.csproj"
COPY . .
WORKDIR "/src/MyProject.API"
RUN dotnet build "MyProject.API.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "MyProject.API.csproj" -c Release -o /app/publish /p:UseAppHost=false

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "MyProject.API.dll"]

Any help will be appreciated, thanks in advance!

UPD: The web app that uses this container image shows "Connected! 504.0 GatewayTimeout" in logs

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2

Answers


  1. 0

    I created a sample ASP .NET 8 Web API and successfully deployed it to azure app service via Azure Container Registry.

    The error message you’re encountering might be related to Environment configuration issues.

    I successfully pushed the image to container registry.

    • Right click on your project in solution explorer=>publish=>Azure => Azure container registry =>select your registry => Finish.

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    • While creating azure web app make sure you choose publish option as Container.

    • Configure the App Service to use the correct container image from your Azure Container Registry (ACR).
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    • After creating the azure app service.

    • Open settings => Configuration => startup command

    • Add dotnet containertestapp18.dll as Startup command.

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    While creating the app itself, the environment variables are automatically configured. However, ensure that the following environment variables are set in your app.
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    Local output :
    enter image description here

    Output after deployment:

    enter image description here

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  2. 0

    Updating my .NET from 8.0.400 to 8.0.401 fixed my issue of pushing the image to ACR when deploying on Azure container Apps (ACA)

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