如何将jmap打进docker容器内

可以在Dockerfile里面加入如下内容

RUN yum -y install tar
RUN curl -O -k xxxx/jdk-8u272-linux-x64.tar.gz  && \
    tar xf jdk-8u272-linux-x64.tar.gz -C /opt && chown -R 1003:1003 /opt/jdk1.8.0_272

RUN ln -s /opt/jdk1.8.0_272/bin/javac /usr/bin/javac
RUN ln -s /opt/jdk1.8.0_272/bin/jar /usr/bin/jar
RUN ln -s /opt/jdk1.8.0_272/bin/java /usr/bin/java

ENV JAVA_HOME=/opt/jdk1.8.0_272/ \
    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/jdk1.8.0_272/bin \
    CLASSPATH=/opt/jdk1.8.0_272/lib \
    LD_LIBRARY_PATH=/opt/jdk1.8.0_272/jre/lib/amd64/jli:/opt/jdk1.8.0_272/lib/amd64/jli

然后使用如下命令登录容器

docker exec --user xxxx -it  ${containerid}  bash

执行如下命令 

java -classpath /opt/jdk1.8.0_272/lib/tools.jar  sun.tools.jmap.JMap -dump:format=b,file=heap.bin pid