Docker Oracle Java

This is a Dockerfile for starting a CentOS container with Java 8u191 installed.

In contrast to other forks, this Dockerfile attempts to minimize the size of the resulting image through the use of the following:

• Does not issue yum update since the base CentOS image is kept up to date anyway.
• Doesn't install wget and instead uses curl which is installed by default
• Installs the Server JRE instead of the full JDK
• Uses ARG instead of ENV where possible to avoid creating more layers
• Coalesce the download and install into a single layer so the downloaded archive can be removed

This saves over 100MiB of storage versus the previous fork

Build

docker build . --tag=centos7-oracle-jdk8:8u191
docker tag centos7-oracle-jdk8:8u191 centos7-oracle-jdk8:latest

Run

$ docker run --rm -it centos7-oracle-jdk8:8u191
# java -version
java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)
# ^D
$