Docker – How to Build & Get Started with Java 7 Container

Following are the key points described later in this article:

• Dockerfile to Build Java 7 Image
• Command to Start Java 7 Container

Dockerfile to Build Java 7 Image

Following is the code for Dockerfile which could be used to build Java 7 image:

FROM centos:centos6

RUN mkdir /opt/jdk
RUN cd /opt

RUN yum -y install wget tar

RUN wget --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.tar.gz

RUN tar -zxf jdk-7u79-linux-x64.tar.gz -C /opt/jdk

RUN update-alternatives --install /usr/bin/java java /opt/jdk/jdk1.7.0_79/bin/java 100
RUN update-alternatives --install /usr/bin/javac javac /opt/jdk/jdk1.7.0_79/bin/javac 100

Save the above file as java7.df. In the same folder, execute the following command. It would build the image with name as “java7”.

docker build -t java7 -f java7.df .

Note that “java7” is name of the image and “java7.df” is the dockerfile.

Command to Start Java 7 Container

Once the image is built, you could start as many containers with following command:

# Start the container, namely, java7_container, using the image java7
docker run --privileged=true -ti -dP --name java7_container -v /c/Users:/mnt/Users java7 /bin/bash

# Access the container
docker exec -ti java7_container /bin/bash