IntelliJ 在 Docker 中调试 Java 应用程序

Question

我是新手。你能告诉我如何设置一个在 Docker 中运行的调试 Java 程序吗？

该项目是在 Maven 的帮助下构建的，然后 Docker 使用它*.war来运行程序。据我了解，IntelliJ 必须远程推送以进行调试。

docker-compose.yml ：

# myapp (Wildfly + Keycloak + myapp)
  myapp-myapp:
    image: myapp/wildfly-myapp:wf11
    container_name: myapp-myapp
    depends_on:
      - myapp-postgres
      - myapp-mailhog
    environment:
      TZ : Europe/Paris
      KEYCLOAK_URL: http://localhost:8080/auth
      WILDFLY_PROXY_ADDRESS_FORWARDING: "true"
      JAVA_OPTS: 
      DB_CONNEXION_URL: jdbc:postgresql://myapp-postgres:5432/myapp_db
      DB_CONNEXION_URL_DELIMITER: "|"
      DB_HOST: myapp-postgres
      DB_NAME: ${DB_NAME}
      DB_PASSWORD: ${DB_PASSWORD}
      DB_USER: ${DB_USER}
      KEYCLOAK_DB_CONNEXION_URL: jdbc:postgresql://myapp-postgres:5432/keycloak
      KEYCLOAK_DB_CONNEXION_URL_DELIMITER: "|"
      KEYCLOAK_DB_USER : keycloak
      KEYCLOAK_DB_PASSWORD : keycloak
      KEYCLOAK_DB_NAME : keycloak
      KEYCLOAK_DB_HOST: postgres
      APP_CLUSTER: "false"
      JGROUPS_EXTERNAL_ADDRESS: 10.178.27.30
      JGROUPS_TCP_EXTERNAL_PORT: 7600
      JGROUPS_TCP_BIND_PORT: 7600
      JGROUPS_DEFAULT_STACK: tcpping
      JGROUPS_INITIAL_HOSTS: "10.178.27.30[7600]"
      WILDFLY_CLUSTER_PASSWORD:
      WILDFLY_NODE_NAME: myapp-master
      SMTP_HOST: myapp-mailhog
      SMTP_PORT: 1025
      SMTP_FROM: ${SMTP_FROM}
      SMTP_USERNAME: ""
      SMTP_PASSWORD: ""
      myapp_LOG_LEVEL: "ALL"
      myapp_DEBUG_LEVEL: "ALL"
    volumes:
       - ./myapp/data:/opt/jboss/myappdata
       - ./myapp/logs:/opt/jboss/wildfly/standalone/log
       - ./myapp/deployments:/opt/jboss/wildfly/standalone/deployments
       - ./myapp/configuration/myapp-admin.properties:/opt/jboss/wildfly/standalone/configuration/myapp-admin.properties
       - ${ST_SRC}:/opt/jboss/myappdata/${PROVIDER_CODE}/frontend/st
       - ${CC_SRC}:/opt/jboss/myappdata/${PROVIDER_CODE}/frontend/cc
       - ${SC_SRC}:/opt/jboss/myappdata/${PROVIDER_CODE}/frontend/sc
    ports:
      - "8080:8080"
      - "7600:7600"

Answer 1

您可以使用以下 JVM-Argument 启用远程调试

-agentlib:jdwp=transport=dt_socket,server=y,address=8000,suspend=n

然后你可以附加 Intellij 调试器Run->Attach to process 你的应用程序应该指定端口（在这种情况下为 8000）

请参阅此处了解更多信息

对于这个例子（Docker-Compose with Wildfly）

environment:
  ...
  JAVA_OPTS: -agentlib:jdwp=transport=dt_socket,server=y,address=8000,suspend=n
  ...
ports:
  - "8000:8000"
  ...

一般来说

码头工人

要在 Docker 中使用，您还必须公开端口

EXPOSE 8000
ENTRYPOINT ["java", "-jar", "-agentlib:jdwp=transport=dt_socket,server=y,address=8000,suspend=n", "/path/to/my/java.jar"]

进而

docker run -p 8000:8000 <image>

IntelliJ（从 2019.1 开始）

这个过程现在可以由 IntelliJ 自动完成 https://blog.jetbrains.com/idea/2019/04/debug-your-java-applications-in-docker-using-intellij-idea/