kubernetesgoogle-kubernetes-enginestackdrivergoogle-cloud-stackdrivergoogle-cloud-debugger

Unable to debug java app through stack driver in google kubernetes cluster

I am trying to debug a java app on GKE cluster through stack driver. I have created a GKE cluster with Allow full access to all Cloud APIs I am following documentation: https://cloud.google.com/debugger/docs/setup/java

Here is my DockerFile:

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} alnt-watchlist-microservice.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/alnt-watchlist-microservice.jar"]

In documentation, it was written to add following lines in DockeFile:

RUN  mkdir /opt/cdbg && \
     wget -qO- https://storage.googleapis.com/cloud-debugger/compute-java/debian-wheezy/cdbg_java_agent_gce.tar.gz | \
     tar xvz -C /opt/cdbg

RUN java -agentpath:/opt/cdbg/cdbg_java_agent.so 
    -Dcom.google.cdbg.module=tpm-watchlist
    -Dcom.google.cdbg.version=v1
    -jar /alnt-watchlist-microservice.jar

When I build DockerFile, It fails saying tar: invalid magic , tar: short read.

In stackdriver debug console, It always show 'No deployed application found'. Which application it will show? I have already 2 services deployed on my kubernetes cluster.

I have already executed gcloud debug source gen-repo-info-file --output-directory="WEB-INF/classes/ in my project's directory.

It generated source-context.json. After its creation, I tried building docker image and its failing.

Solution

  • I resolved the issue.

    Firstly, you will have to use java image "gcr.io/google-appengine/openjdk" instead of Alpine one.

    Secondly, I was putting entry points without comma separated (Basically in wrong format)

    ENTRYPOINT ["java","-agentpath:/opt/cdbg/cdbg_java_agent.so", "-Djava.security.egd=file:/dev/./urandom"  ,"-Dcom.google.cdbg.module=watchlist"]