无法在两个兄弟容器之间通信

Question

我有两个项目，一个是aspnet核心API项目，另一个是xUnit e2e项目，两者都部署在两个不同的容器中。

一旦两个容器都启动并运行，e2e容器就会尝试在url上访问Web API项目的APIhttps://web-api-container:5010/.但e2e项目无法实现API项目。似乎无法使用其主机名访问API项目(http://web-api-container:5010/). 我的cli中出现以下错误：

|错误消息：|System.Net.Http。HttpRequestException:连接被拒绝|---System.Net.Sockets。SocketException:连接被拒绝|堆栈跟踪：|，位于System.Net.Http.ConnectHelper。在System.Threading.Tasks.ValueTask1.get_Result（）|和System.Net.Http.HttpConnectionPool上的ConnectAsync（字符串主机、Int32端口、取消令牌和取消令牌）。在System.Threading.Tasks.ValueTask1.get_

即使我尝试访问我的Web API url(http://web-api-container:5010/)直接从我的主机浏览器，我得到的网站无法访问错误。但如果我导航到http://localhost:5010/通过我的web浏览器，我可以从API获得响应。

/来源/WebAPI/Dockerfile：

FROM microsoft/dotnet:2.1-aspnetcore-runtime AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM microsoft/dotnet:2.1-sdk AS build
WORKDIR /src
COPY Source/WebAPI/WebAPI.csproj Source/WebAPI/
COPY Tests/WebAPI.UnitTests/WebAPI.UnitTests.csproj Tests/WebAPI.UnitTests/

RUN dotnet restore Tests/WebAPI.UnitTests/WebAPI.UnitTests.csproj
RUN dotnet restore Source/WebAPI/WebAPI.csproj

COPY . .

WORKDIR /src/Tests/WebAPI.UnitTests/
RUN dotnet build && dotnet test -c Release /p:CollectCoverage=true /p:CoverletOutputFormat=json /p:CoverletOutput=./TestResults/Coverage/


WORKDIR /src/Source/WebAPI
RUN dotnet build WebAPI.csproj -c Release -o /app



FROM build AS publish
RUN dotnet publish WebAPI.csproj -c Release -o /app

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

. /Tests/WebAPI.EndToEndTests/Dockerfile：

#pull from microsoft/dotnet
FROM microsoft/dotnet:2.1.301-sdk AS build

WORKDIR /src

# copying
COPY Tests/WebAPI.EndToEndTests/WebAPI.EndToEndTests.csproj Tests/WebAPI.EndToEndTests/

#restore 
RUN dotnet restore Tests/WebAPI.EndToEndTests/WebAPI.EndToEndTests.csproj

#copy rest
COPY . .

#build
WORKDIR /src/Tests/WebAPI.EndToEndTests
RUN dotnet build
CMD ["sh", "-c", "sleep 1m && dotnet test --logger trx"]

./docker-compose.yml：

version: '3.4'

services:
  webapi:
    container_name: web-api-container
    image: web-api-image
    build:
      context: .
      dockerfile: Source/WebAPI/Dockerfile
    ports:
      - 5010:80
      - 5001:443
    networks: 
      - my-network

  webapiendtoend:
    container_name: e2e-test-container
    image: Web-api-endtoend-test-image
    build:
      context: .
      dockerfile: Tests/WebAPI.EndToEndTests/Dockerfile
    networks:  
      - my-network

  rabbitmq:
    container_name: rabbitmq-container
    image: "rabbitmq:3.7-management"
    ports:
      - 5672:5672
      - 15672:15672
    tty: true
    networks:  
      - my-network
    volumes:
      - ./Source/WebAPI/RabbitMQConfig/rabbitmq.config:/etc/rabbitmq/rabbitmq.config:ro
      - ./Source/WebAPI/RabbitMQConfig/definitions.json:/etc/rabbitmq/definitions.json:ro

networks:
  my-network:

测试\WebAPI.EndToEndTests\appsettings.json：

{
  "MessageQueueApi": {
    "Url": "http://web-api-container:5010/"
  }
}

. /Tests/WebAPI.EndToEndTests/Test/BaseTest.cs：

public class BaseTest : IDisposable
    {
        public BaseTest()
        {
            var appSettings = AppSettings.Current;
            var httpClientHandler = new HttpClientHandler()
            {
                AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate,
            };
            this.HttpClient = new HttpClient(httpClientHandler)
            {
                BaseAddress = appSettings.MessageQueueApi.Url,

            };
            Console.WriteLine("<---API URL is --->" + appSettings.MessageQueueApi.Url);

            Console.WriteLine("---Base address");
            Console.WriteLine(this.HttpClient.BaseAddress);
        }

        public HttpClient HttpClient { get; set; }

        public List<string> AllValues { get; set; }

        public void Dispose() => this.HttpClient.Dispose();

        protected async Task GetAllValues()
        {
            Console.WriteLine("----in get all values---");
            var response  = await this.HttpClient.GetAsync("api/values");
            response.StatusCode.ShouldBe(HttpStatusCode.OK);         
        }


        protected Task<HttpResponseMessage> ClearCache() =>
            this.HttpClient.PostAsJsonAsync("cache/clear", string.Empty);
    }

Answer 1

5010是暴露于主机的端口。您可以使用容器中的容器端口进行通信。使用端口80而不是使用5010。

http://web-api-container:80

这将完成这项工作。