This article presents tips and code samples on how to build a Java 7 Docker image and start up Java 7 containers. Please feel free to comment/suggest if I missed to mention one or more important points.
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