Blazor(.NET6) Server/Client应用部署Google App Engine失败报错

问题描述 #

我有一个Blazor(.NET 6) Server/Client应用，本地通过Visual Studio的HTTPS或Docker容器启动都正常，但执行gcloud app deploy部署到Google App Engine时，出现以下错误：

Step 8/18 : RUN dotnet restore "./SevenOfNine/Server/SevenOfNine.Server.csproj"
 ---> Running in b72b6927c101
MSBUILD : error MSB1009: Project file does not exist.
Switch: ./SevenOfNine/Server/SevenOfNine.Server.csproj
The command '/bin/sh -c dotnet restore "./SevenOfNine/Server/SevenOfNine.Server.csproj"' returned a non-zero code: 1

相关配置文件 #

Dockerfile

#See https://aka.ms/customizecontainer to learn how to customize your debug container and how Visual Studio uses this Dockerfile to build your images for faster debugging.

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
ARG BUILD_CONFIGURATION=Release
WORKDIR /src
COPY ["SevenOfNine/Server/SevenOfNine.Server.csproj", "SevenOfNine/Server/"]
COPY ["SevenOfNine/Server/holodeckhub-da6f4d98c75e.json", "SevenOfNine/Server/"]
COPY ["SevenOfNine.Models/SevenOfNine.Models.csproj", "SevenOfNine.Models/"]
COPY ["SevenOfNine/Client/SevenOfNine.Client.csproj", "SevenOfNine/Client/"]
COPY ["SevenOfNine/Shared/SevenOfNine.Shared.csproj", "SevenOfNine/Shared/"]
RUN dotnet restore "./SevenOfNine/Server/SevenOfNine.Server.csproj"
COPY . .
WORKDIR "/src/SevenOfNine/Server"
RUN dotnet build "./SevenOfNine.Server.csproj" -c $BUILD_CONFIGURATION -o /app/build

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

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

app.yaml

runtime: custom
env: flex

文件夹结构

\BorgCollective\
   BorgCollective.sln
   .dockerignore
   SevenOfNine\
      Server\
         SevenOfNine.Server.csproj
         Dockerfile
      Client\
         SevenOfNine.Client.csproj

.dockerignore文件

**/.classpath
**/.dockerignore
**/.env
**/.git
**/.gitignore
**/.project
**/.settings
**/.toolstarget
**/.vs
**/.vscode
**/*.*proj.user
**/*.dbmdl
**/*.jfm
**/azds.yaml
**/bin
**/charts
**/docker-compose*
**/Dockerfile*
**/node_modules
**/npm-debug.log
**/obj
**/secrets.dev.yaml
**/values.dev.yaml
LICENSE
README.md
!**/.gitignore
!.git/HEAD
!.git/config
!.git/packed-refs
!.git/refs/heads/**

解决方案 #

核心原因 #

你从Server子文件夹执行部署命令，但Dockerfile中的路径是基于解决方案根目录（BorgCollective）定义的，导致构建上下文不对，COPY指令找不到项目文件。

解决步骤 #

1. 切换到解决方案根目录执行部署
   进入\BorgCollective\文件夹，运行gcloud app deploy。这是最直接的方案，能保证Dockerfile的路径上下文与本地调试时一致。

2. 调整Dockerfile路径（可选）
   若坚持从Server目录部署，需修改Dockerfile中所有路径，适配当前上下文：

   # 修改COPY指令路径
   COPY ["../SevenOfNine/Server/SevenOfNine.Server.csproj", "../SevenOfNine/Server/"]
   COPY ["../SevenOfNine.Models/SevenOfNine.Models.csproj", "../SevenOfNine.Models/"]
   COPY ["../SevenOfNine/Client/SevenOfNine.Client.csproj", "../SevenOfNine/Client/"]
   COPY ["../SevenOfNine/Shared/SevenOfNine.Shared.csproj", "../SevenOfNine/Shared/"]
   # 修改restore路径
   RUN dotnet restore "../SevenOfNine/Server/SevenOfNine.Server.csproj"
   # 修改COPY根目录
   COPY .. .
   WORKDIR "/src/SevenOfNine/Server"
   

   此方式容易因路径层级出错，优先推荐第一种方案。

3. 验证.dockerignore配置
   临时注释掉**/Dockerfile*和**/.dockerignore规则，避免部署时误排除必要文件（当前错误并非由此导致，但可排除潜在问题）。

内容的提问来源于stack exchange，提问作者Dan Csharpster