docker 容器之间的 gRPC 通信

Question

我的本地（没有 docker）很好，工作没有任何问题。本地设置工作正常。Server-Jar：运行于 8081Client-War：运行在 8000，可以毫无问题地连接到 Server Jar。DOCKER 设置docker-compose.yml服务器employee:    image: openjdk:jdk-alpine    container_name: "employee"    ports:      - 9081:8080      - 9991:9990      - 65193:65193    volumes:      - ./Employee/target/Employee-1.0-SNAPSHOT-jar-with-dependencies.jar:/deployments/Employee-1.0-SNAPSHOT-jar-with-dependencies.jar    environment:      - JAVA_OPTS=-agentlib:jdwp=transport=dt_socket,address=0.0.0.0:65193,suspend=n,server=y -Djava.net.preferIPv4Stack=true      - GRPC_PORT=8080    command: java -jar /deployments/Employee-1.0-SNAPSHOT-jar-with-dependencies.jarclient:    image: jboss/wildfly    container_name: "client"    ports:      - 9080:8080      - 9990:9990      - 65193:65193    volumes:      - ./Service/target/Service.war:/opt/jboss/wildfly/standalone/deployments/Service.war    environment:      - JAVA_OPTS=-agentlib:jdwp=transport=dt_socket,address=0.0.0.0:65193,suspend=n,server=y -Djava.net.preferIPv4Stack=true      - EMPLOYEE_HOST=localhost:9081    command: >      bash -c "/opt/jboss/wildfly/bin/add-user.sh admin Admin#007 --silent && /opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0 -bmanagement 0.0.0.0"links:  - employeedepends_on:  - employee员工服务器代码Server server = ServerBuilder.forPort(Integer.parseInt(env.get("GRPC_PORT")))        .addService(new Employee())        .build();try {    server.start();    System.out.println("Server listening at: " + env.get("GRPC_PORT"));    server.awaitTermination();} catch (IOException | InterruptedException e) {    e.printStackTrace();}客户端连接代码。ManagedChannel channel = ManagedChannelBuilder.forTarget(env.get("EMPLOYEE_HOST")).usePlaintext().build();EmployeeServiceGrpc.EmployeeServiceBlockingStub employee = EmployeeServiceGrpc.newBlockingStub(channel);当我进行 gRPC 调用时抛出错误。您认为 docker 设置正确吗？如果那么我可以在其他地方寻找问题

Answer 1

看到这个人为的例子：

version: "3"

services:

  server:

    image: nginx:1.17.3

    restart: always

    container_name: nginx

    expose:

    - "80"

    ports:

    - 8888:80

  client:

    image: busybox:1.31.0

    restart: always

    depends_on:

    - server

    container_name: busybox

    command:

    - ash

    - -c

    - |

      while true;

      do

        wget --spider http://server:80 2>&1

        sleep 5s;

      done;

client通过端口访问 Nginx 容器80，但它用作server主机地址以解析到适当的 (Nginx) 容器。

如果您要替换server为localhostin client，则客户端会尝试wget对自己执行命令，但会失败。

因为server发布8888到主机，当 Docker Compose 启动时，从主机（！），你可以wget http://localhost:8888并且这将起作用（200）。