Dotnet watch 在 docker-compose 中失败

Question

我最近不得不更新 docker（2.2.0.0 稳定版 42247），现在我dotnet watch在使用docker-compose.

我的工作流程是将解决方案目录（在主机上）挂载到dotnet watch在相关项目上运行的 docker 容器上，初始版本看起来有点像这样：

./docker-compose.yml

version: "3.2"
services:
  my-api:
    build: 
      context: $MY_API_LOCATION_ON_HOST # the folder with the .sln file and all projects
      dockerfile: $DOCKERFILE_ROOT/Dockerfile-aspcore-dev
      args:
        PROJECT: app/src/MyApi # Where the .csproj will be
    volumes:
      - type: bind
        source: $MY_API_LOCATION_ON_HOST # the folder with the .sln file and all projects
        target: /app
      - type: bind
        source: $SECRETS_FOLDER # C:\Users\DevUser\AppData\Roaming\Microsoft\UserSecrets
        target: /root/.microsoft/usersecrets

./Dockerfile-aspcore-dev

FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
ARG PROJECT
WORKDIR ${PROJECT}

ENTRYPOINT ["dotnet", "watch", "run", "--urls", "http://0.0.0.0:5000"]

它会成功运行。更新后，我收到以下错误：

docker-compose up --build --force-recreate my-api
Building my-api
Step 1/4 : FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
 ---> 2fe8fe202baf
Step 2/4 : ARG PROJECT
 ---> Using cache
 ---> cee4bd05745b
Step 3/4 : WORKDIR ${PROJECT}
 ---> Using cache
 ---> ed12fa68fc7e
Step 4/4 : ENTRYPOINT ["dotnet", "watch", "run", "--urls", "http://0.0.0.0:5000"]
 ---> Using cache
 ---> 6c0b8b95cd8e
Successfully built 6c0b8b95cd8e
Successfully tagged src_my-api:latest
Recreating src_my-api_1 ... done
Attaching to src_my-api_1
my-api_1                 | System.IO.FileNotFoundException: Unable to find the specified file.
my-api_1                 |    at Interop.Sys.GetCwdHelper(Byte* ptr, Int32 bufferSize)
my-api_1                 |    at Interop.Sys.GetCwd()
my-api_1                 |    at System.Environment.get_CurrentDirectory()
my-api_1                 |    at System.IO.Directory.GetCurrentDirectory()
my-api_1                 |    at Microsoft.DotNet.CommandFactory.CommandResolver.TryResolveCommandSpec(ICommandResolverPolicy 
commandResolverPolicy, String commandName, IEnumerable`1 args, NuGetFramework framework, String configuration, String outputPath, 
String applicationName)
my-api_1                 |    at Microsoft.DotNet.CommandFactory.CommandFactoryUsingResolver.Create(ICommandResolverPolicy commandResolverPolicy, String commandName, IEnumerable`1 args, NuGetFramework framework, String configuration, String outputPath, String applicationName)
my-api_1                 |    at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, ITelemetry telemetryClient)
my-api_1                 |    at Microsoft.DotNet.Cli.Program.Main(String[] args)
src_my-api_1 exited with code 1

此输出以及我的临时解决方法表明，这与无法弄清楚 cwd 或 pwd 是什么有关，而不是 dotnet watch 的问题。解决方法如下：

./docker-compose.yml

version: "3.2"
services:
  my-api:
+    tty: true
+    stdin_open: true
    working_dir: /app/src/MyApi # Where the .csproj will be
    build: 
      context: $MY_API_LOCATION_ON_HOST
      dockerfile: $DOCKERFILE_ROOT/Dockerfile-aspcore-dev
    volumes:
      - type: bind
        source: $MY_API_LOCATION_ON_HOST # the folder with the .sln file and all projects
        target: /app
      - type: bind
        source: $SECRETS_FOLDER # C:\Users\DevUser\AppData\Roaming\Microsoft\UserSecrets
        target: /root/.microsoft/usersecrets

./Dockerfile-aspcore-dev

FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
ARG PROJECT
WORKDIR ${PROJECT}

- ENTRYPOINT ["dotnet", "watch", "run", "--urls", "http://0.0.0.0:5000"]

跑：

docker-compose up --build --force-recreate search-api
Building search-api
Step 1/3 : FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
 ---> 2fe8fe202baf
Step 2/3 : ARG PROJECT
 ---> Using cache
 ---> cee4bd05745b
Step 3/3 : WORKDIR ${PROJECT}
 ---> Using cache
 ---> ed12fa68fc7e
Successfully built ed12fa68fc7e
Successfully tagged src_search-api:latest
Recreating src_search-api_1 ... done
Attaching to src_search-api_1

然后运行：

docker exec -it src_my-api_1 dotnet "watch" "run" "--urls" "http://0.0.0.0:5000"
watch : Polling file watcher is enabled
watch : Started
watch : Exited
watch : File changed: /app/src/MyApi/Constants.cs
watch : Started
...

另外运行类似的东西

FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
ARG PROJECT
WORKDIR ${PROJECT}

ENTRYPOINT ["dotnet", "fsx"]

会产生非常相似的错误

docker-compose up --build --force-recreate my-api
Building my-api
Step 1/4 : FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
 ---> 2fe8fe202baf
Step 2/4 : ARG PROJECT
 ---> Using cache
 ---> cee4bd05745b
Step 3/4 : WORKDIR ${PROJECT}
 ---> Using cache
 ---> ed12fa68fc7e
Step 4/4 : ENTRYPOINT ["dotnet", "fsx"]
 ---> Running in eaa49fc2294c
Removing intermediate container eaa49fc2294c
 ---> f2f4f212d0e9
Successfully built f2f4f212d0e9
Successfully tagged src_my-api:latest
Recreating src_my-api_1 ... done
Attaching to src_my-api_1
my-api_1                 | System.IO.FileNotFoundException: Unable to find the specified file.
my-api_1                 |    at Interop.Sys.GetCwdHelper(Byte* ptr, Int32 bufferSize)
my-api_1                 |    at Interop.Sys.GetCwd()
my-api_1                 |    at System.Environment.get_CurrentDirectory()
my-api_1                 |    at System.IO.Directory.GetCurrentDirectory()
my-api_1                 |    at Microsoft.DotNet.CommandFactory.CommandResolver.TryResolveCommandSpec(ICommandResolverPolicy 
commandResolverPolicy, String commandName, IEnumerable`1 args, NuGetFramework framework, String configuration, String outputPath, 
String applicationName)
my-api_1                 |    at Microsoft.DotNet.CommandFactory.CommandFactoryUsingResolver.Create(ICommandResolverPolicy commandResolverPolicy, String commandName, IEnumerable`1 args, NuGetFramework framework, String configuration, String outputPath, String applicationName)
my-api_1                 |    at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, ITelemetry telemetryClient)
my-api_1                 |    at Microsoft.DotNet.Cli.Program.Main(String[] args)
src_my-api_1 exited with code 1

Answer 1

我没有使用特定版本，并且看到 github 问题帖子说要把你的版本降到 2.1 之类的。然而，如果有其他人出现，这里有一个可以运行的 3.1.404 版本，它可能会为您指明正确的方向。

Dockerfile.dev

FROM mcr.microsoft.com/dotnet/core/sdk:3.1.404-buster
WORKDIR /app

COPY *.sln ./
COPY *.csproj ./
RUN dotnet restore

ENTRYPOINT ["dotnet","watch","run","--no-launch-profile"]

和撰写文件

version: "3.8"
services:
    aspnet_service:
        container_name: aspnet_dev_container
        restart: always
        hostname: api
        build:
          context: .
          dockerfile: ./Docker/api/Dockerfile.dev
        environment:
          - ASPNETCORE_URLS=https://+;http://+
          - ASPNETCORE_HTTPS_PORT=5001
          - ASPNETCORE_ENVIRONMENT=Development
        ports:
          - target: 80
            published: 5000
            protocol: tcp
            mode: host
      - target: 443
        published: 5001
        protocol: tcp
        mode: host
        volumes:
          - ./:/app
          - ${APPDATA}\microsoft\UserSecrets\:/root/.microsoft/usersecrets
          - ${USERPROFILE}\.aspnet\https:/root/.aspnet/https/
        working_dir: /app
        stdin_open: true
        tty: true
        command: dotnet watch run --no-launch-profile

稍微了解一下，如果您愿意，这个 docker-compose 还可以让您在本地使用 https 证书。Build: dockerfile 部分只是我的 dockerfile 的路径，而上下文是项目的根目录。

卷数

• ./:/app - 上下文中的所有内容现在都是 /app 容器中的卷挂载，这是 Dockerfile 中声明的 workindir
• {APPDATA} 卷是本地存储秘密的位置，我还将展示如何制作它
• {USERPROFILE} 我现在不太记得了，但它与秘密有关

这--no-launch-profile对我有用，所以我把它保留下来，--no-restore就像我在其他失败的项目示例中看到的那样。

我找不到关于如何让 https 工作的帖子，但如果您希望我编辑此回复并将其添加进去，请发表评论，我会的。我把它省略了，因为它与问题无关。