Github Action 构建部署 Docker .Net 8 WebApi 失败 - “程序不包含适合入口点的静态‘Main’方法”

Question

我正在尝试完成 Github 操作，以使用 Docker 将我的 .Net8 Web API 构建并部署到 Kubernetes。这是我当前用于工作流程的 yml 文件：

name: Deploy to DigitalOcean Kubernetes

on:
  push:
    branches:
      - main 

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    env:
        NUGETUSERNAME: ${{ secrets.NUGETUSERNAME }}
        NUGETPASSWORD: ${{ secrets.NUGETPASSWORD }}
    steps:
    - name: Check out code
      uses: actions/checkout@v2

    - name: Log in to DigitalOcean Container Registry
      uses: docker/login-action@v1
      with:
        registry: registry.digitalocean.com
        username: _  # DigitalOcean requires username to be `_`
        password: ${{ secrets.DIGITALOCEAN_ACCESS_TOKEN }}
      
    - name: Replace Github Username In Nuget.Config
      run: sed -i 's/%NUGETUSERNAME%/${{ secrets.NUGETUSERNAME }}/g' x/x.Api/nuget.config
      
    - name: Replace Github Password In Nuget.Config
      run: sed -i 's/%NUGETPASSWORD%/${{ secrets.NUGETPASSWORD }}/g' x/x.Api/nuget.config

    - name: Build and push Docker image
      uses: docker/build-push-action@v2
      with:
        context: x/x.Api
        file: x/x.Api/Dockerfile
        push: true
        tags: registry.digitalocean.com/x-api/aggregator-api:latest  # Replace with your registry and image name

  deploy:
    needs: build-and-push
    runs-on: ubuntu-latest
    steps:
    - name: Install Kompose
      run: |
        curl -L https://github.com/kubernetes/kompose/releases/download/v1.26.0/kompose-linux-amd64 -o kompose
        chmod +x kompose
        sudo mv kompose /usr/local/bin/kompose

    - name: Convert Docker Compose to Kubernetes manifests
      run: kompose convert -f docker-compose.yml -o ./k8s/

    - name: Set up Kubectl
      uses: azure/setup-kubectl@v1

    - name: Configure Kubernetes context
      uses: azure/k8s-set-context@v1
      with:
        method: kubeconfig
        kubeconfig: ${{ secrets.KUBECONFIG }}

    - name: Deploy to Kubernetes
      run: |
        kubectl apply -f ./k8s/

    - name: Verify deployment
      run: kubectl rollout status deployment/x

这是API的Docker文件

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

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
ARG BUILD_CONFIGURATION=Release
WORKDIR /src
COPY ["x.Api.csproj", "x.Api/"]
COPY ./nuget.config ./
RUN dotnet restore "./x.Api/./x.Api.csproj" --configfile nuget.config 
COPY . .
WORKDIR "/src/x.Api"
RUN dotnet build "./x.csproj" -c $BUILD_CONFIGURATION -o /app/build

FROM build AS publish
ARG BUILD_CONFIGURATION=Release
RUN dotnet publish "./x.Api.csproj" -c $BUILD_CONFIGURATION -o /app/publish /p:UseAppHost=false

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

当 Github Action 运行时，它会失败，并且我得到以下信息（在 dotnet build 上）：“程序不包含适合入口点的静态‘Main’方法”

我已更新 Docker 文件以使用此行更具体（添加 -v=q /property:StartupObject=x.Api.Program）：

RUN dotnet build "./x.Api.csproj" -v=q /property:StartupObject=x.Api.Program -c $BUILD_CONFIGURATION -o /app/build

它再次失败：“找不到为主方法指定的‘x.Api.Program’...”

这个项目使用 docker-compose 在本地构建得很好。

我还打开了Visual Studio中的项目设置，查看设置了哪个启动对象，发现没有设置任何内容，并且下拉列表中没有任何可用的内容：

有人知道这是怎么回事吗？

Answer 1

找到答案：

FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
ARG BUILD_CONFIGURATION=Release
WORKDIR /src
COPY ["x.Api.csproj", "x.Api/"]
COPY ./nuget.config ./
RUN dotnet restore "./x.Api/./x.Api.csproj" --configfile nuget.config 
WORKDIR "/src/x.Api"
COPY . .
RUN dotnet build "./x.csproj" -c $BUILD_CONFIGURATION -o /app/build

将“WORKDIR”/src/x.Api“”移至“COPY . .”上方