Docker dotnet watch run错误：无法绑定到IPv6环回接口上的https：// localhost：5000

Question

如标题所示，我有一个无法从主机端口绑定到容器端口的容器。我尝试搜索类似的问题，但是自从Microsoft
microsoft/dotnet在sdk映像中引入了带有dotnet watch 的docker repo
以来，没有发现与在docker容器中使用dotnet watch相关的任何信息。

对于我在做什么错的任何建议，我们将不胜感激。

Docker文件

FROM microsoft/dotnet:2.1.301-sdk as build
ENV DOTNET_USE_POLLING_FILE_WATCHER 1
WORKDIR /app
COPY . .
RUN dotnet restore
EXPOSE 5000-5001
ENTRYPOINT [ "dotnet", "watch", "run", "--no-restore"]

docker-compose.yml

version: "3"

services:

  esportapp:
    container_name: esportapp
    image: esportapp:dev
    build:
      context: .
      dockerfile: Docker/dev.Dockerfile
    volumes:
      - esportapp.volume:/app
    ports:
      - "5000:5000"
      - "5001:5001"

volumes:
  esportapp.volume:

完成错误：

esportapp    | Hosting environment: Development
esportapp    | Content root path: /app
esportapp    | Now listening on: https://localhost:5001
esportapp    | Now listening on: http://localhost:5000
esportapp    | Application started. Press Ctrl+C to shut down.
esportapp    | warn: Microsoft.AspNetCore.Server.Kestrel[0]
esportapp    |       Unable to bind to https://localhost:5001 on the IPv6 loopback interface: 'Cannot assign requested address'.
esportapp    | warn: Microsoft.AspNetCore.Server.Kestrel[0]
esportapp    |       Unable to bind to http://localhost:5000 on the IPv6 loopback interface: 'Cannot assign requested address'.

Answer 1

我自己就遇到了这个问题。我认为dotnet watch run与localhost类型的url配合不好。尝试https://0.0.0.0:5000在您的容器中将托管网址设置为。

在dockerfile中，带有：

ENTRYPOINT [ "dotnet", "watch", "run", "--no-restore", "--urls", "https://0.0.0.0:5000"]

或在launchSettings.json中，例如：

{
  "profiles": {
    "[Put your project name here]": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "DOTNET_USE_POLLING_FILE_WATCHER": "true"
      },
      "applicationUrl": "https://0.0.0.0:5000/"
    }
  }
}

现在，要使其自动从容器中重新加载，您必须使用轮询文件监视程序。这就是第二个环境变量的用途。（这很常见，您必须使用webpack，angular等来执行此操作）。

在您的情况下，您需要将更esportsapp.volume改为主机上的目录：

volumes:
  - ./:/app

它将容器中的/ app卷映射到docker-compose目录。您面临的问题是该应用程序内置在项目默认的docker-
compose网络上的某个卷中，因此，当您在源目录中更改文件时，该卷中实际上并没有更改。但是，使用此修复程序，您将遇到容器内部dotnet恢复和dotnet监视更改主机文件的问题。如果您有兴趣，可以解决所有问题…

我通常的.Net Core App Docker设置

要调试，请运行： docker-compose -f run.yml up --build

要构建发行版： docker-compose -f build.yml up --build

项目结构

/                                               # source control root
/build.yml                                      # docker-compose file for building a release
/run.yml                                        # docker-compose file for running locally & debugging
/project                                        # an application
/project/build.Dockerfile                       # the docker container that will build "project" for release
/project/run.Dockerfile                         # the docker container that will build and run "project" locally for debugging
/project/.dockerignore                          # speeds up container builds by excluding large directories like "packages" or "node_modules"
/project/src                                    # where I hide my source codez
/project/src/Project.sln
/project/src/Project/Project.csproj
/project/src/Project/Directory.Build.props      # keeps a docker mapped volume from overwriting .dlls on your host
/project/src/Project.Data/Project.Data.csproj   # typical .Net project structure
/web-api                                        # another application...

Directory.Build.props （将其与.csproj放在同一文件夹中，dotnet watch run以免使命令与主机上的源目录混淆）

<Project>

  <PropertyGroup>
    <DefaultItemExcludes>$(DefaultItemExcludes);$(MSBuildProjectDirectory)/obj/**/*</DefaultItemExcludes>
    <DefaultItemExcludes>$(DefaultItemExcludes);$(MSBuildProjectDirectory)/bin/**/*</DefaultItemExcludes>
  </PropertyGroup>

  <PropertyGroup Condition="'$(DOTNET_RUNNING_IN_CONTAINER)' == 'true'">
    <BaseIntermediateOutputPath>$(MSBuildProjectDirectory)/obj/container/</BaseIntermediateOutputPath>
    <BaseOutputPath>$(MSBuildProjectDirectory)/bin/container/</BaseOutputPath>
  </PropertyGroup>

  <PropertyGroup Condition="'$(DOTNET_RUNNING_IN_CONTAINER)' != 'true'">
    <BaseIntermediateOutputPath>$(MSBuildProjectDirectory)/obj/local/</BaseIntermediateOutputPath>
    <BaseOutputPath>$(MSBuildProjectDirectory)/bin/local/</BaseOutputPath>
  </PropertyGroup>

</Project>

run.yml （用于调试的docker-compose.yml）

version: "3.5"
services:
  project:
    build:
      context: ./project
      dockerfile: run.Dockerfile
    ports:
      - 5000:80
    volumes:
      - ./project/src/Project:/app

run.Dockerfile （用于调试的Dockerfile）

FROM microsoft/dotnet:2.1-sdk

# install the .net core debugger
RUN apt-get update
RUN apt-get -y --no-install-recommends install unzip
RUN apt-get -y --no-install-recommends install procps
RUN rm -rf /var/lib/apt/lists/*

RUN curl -sSL https://aka.ms/getvsdbgsh | bash /dev/stdin -v latest -l /vsdbg

VOLUME /app
WORKDIR /app

CMD dotnet watch run --urls http://0.0.0.0:80

build.yml （用于构建发行版的docker-compose.yml）

version: "3.5"
services:
  project:
    build:
      context: ./project
      dockerfile: build.Dockerfile
    volumes:
      - ./project:/app

build.Dockerfile （用于构建发行版的Dockerfile）

FROM microsoft/dotnet:2.1-sdk

VOLUME /app

# restore as a separate layer to speed up builds
WORKDIR /src
COPY src/Project/Project.csproj .
RUN dotnet restore

COPY src/Project/ .
CMD dotnet publish -c Release -o /app/out/