Formed in 2009, the Archive Team (not to be confused with the archive.org Archive-It Team) is a rogue archivist collective dedicated to saving copies of rapidly dying or deleted websites for the sake of history and digital heritage. The group is 100% composed of volunteers and interested parties, and has expanded into a large amount of related projects for saving online and digital history.
Docker¶
Use JDK in Docker¶
Many times, the problem that arthas can’t work with the application in docker is because the docker does not install JDK, but installs JRE. If only JRE is installed, many JAVA command line tools and class libraries will be missing, and Arthas will not work properly. Here are two common ways to use JDK in Docker.
Use public JDK image¶
https://hub.docker.com/_/openjdk/
such as:
FROM openjdk:8-jdk
or:
FROM openjdk:8-jdk-alpine
Install via package management software¶
such as:
# Install OpenJDK-8
RUN apt-get update && \
apt-get install -y openjdk-8-jdk && \
apt-get install -y ant && \
apt-get clean;
# Fix certificate issues
RUN apt-get update && \
apt-get install ca-certificates-java && \
apt-get clean && \
update-ca-certificates -f;
# Setup JAVA_HOME - useful for docker commandline
ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/
RUN export JAVA_HOMEor:
RUN yum install -y \
java-1.8.0-openjdk \
java-1.8.0-openjdk-devel
ENV JAVA_HOME /usr/lib/jvm/java-1.8.0-openjdk/
RUN export JAVA_HOMEQuick start with Docker¶
Delete the existing
math-gamedocker container (not necessary)$ docker stop math-game || true && docker rm math-game || true
Start
math-game$ docker run --name math-game -it hengyunabc/arthas:latest /bin/sh -c "java -jar /opt/arthas/math-game.jar"
Start
arthas-bootfor diagnosis$ docker exec -it math-game /bin/sh -c "java -jar /opt/arthas/arthas-boot.jar" * [1]: 9 jar [INFO] arthas home: /opt/arthas [INFO] Try to attach process 9 [INFO] Attach process 9 success. [INFO] arthas-client connect 127.0.0.1 3658 ,---. ,------. ,--------.,--. ,--. ,---. ,---. / O \ | .--. ''--. .--'| '--' | / O \ ' .-' | .-. || '--'.' | | | .--. || .-. |`. `-. | | | || |\ \ | | | | | || | | |.-' | `--' `--'`--' '--' `--' `--' `--'`--' `--'`-----' wiki: https://arthas.aliyun.com/doc version: 3.0.5 pid: 9 time: 2018-12-18 11:30:36
Diagnose the Java process in Docker¶
docker exec -it ${containerId} /bin/bash -c "wget https://arthas.aliyun.com/arthas-boot.jar && java -jar arthas-boot.jar"Diagnose the Java process in the container in k8s¶
kubectl exec -it ${pod} --container ${containerId} -- /bin/bash -c "wget https://arthas.aliyun.com/arthas-boot.jar && java -jar arthas-boot.jar"Install Arthas into the base Docker image¶
It’s easy to install Arthas into your Docker image.
FROM openjdk:8-jdk-alpine
# copy arthas
COPY --from=hengyunabc/arthas:latest /opt/arthas /opt/arthas
If you want to specify a version, you can view all the tags: