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Last active July 9, 2023 06:46
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Attach Debugger to Remote JVM using Debugger for Java Extension in VS Code when using Docker containers.
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Dockerfile
# syntax=docker/dockerfile:1
FROM eclipse-temurin:17-jdk-jammy as base
WORKDIR /app
COPY .mvn/ .mvn
COPY mvnw pom.xml ./
RUN ./mvnw dependency:resolve
COPY src ./src
FROM base as development
# exposing 8000 in development enables attaching to remote jvm debugger
EXPOSE 8000
CMD ["./mvnw", "spring-boot:run", "-Dspring-boot.run.profiles=mysql", "-Dspring-boot.run.jvmArguments='-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:8000'"]
FROM base as build
RUN ./mvnw package
FROM eclipse-temurin:17-jre-jammy as production
EXPOSE 8080
COPY --from=build /app/target/spring-petclinic-*.jar /spring-petclinic.jar
CMD ["java", "-Djava.security.egd=file:/dev/./urandom", "-jar", "/spring-petclinic.jar"]
Raw
launch.json
{
"version": "0.2.0",
"configurations": [
{
"type": "java",
"name": "Attach to Remote JVM",
"projectName": "spring-petclinic",
"request": "attach",
"hostName": "localhost",
"port": "8000",
},
]
}
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joe-mccann-dev commented Jul 9, 2023 •
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  • following Docker Java tutorial here: https://docs.docker.com/language/java/develop/
  • when you get to the "Connect to Debugger" section, they provide instructions for IntelliJ but not for VS Code
  • Under "Run and Debug", click dropdown near green play button and then select "Add Configuration"
  • initially I had difficulty connecting VS Code Debugger for Java extension to remote jvm in Docker container.
  • required exposing port 8000 in development, e.g. Dockerfile below "FROM base as development \ EXPOSE 8000"
  • projectName was required for 'watch' feature of debugger and is root directory of project

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