Switch to official Java 8 base image

Author: Manc

openjdk8/Dockerfile

@@ -1,7 +1,5 @@
-# Alpine Linux with OpenJDK Java Runtime Environment 8 and Bash
-
-FROM alpine:3.3
+FROM java:8-jre-alpine
 
 MAINTAINER Nick Zahn <hi@cloudunder.io>
 
-RUN apk add --update bash openjdk8 && rm -rf /var/cache/apk/*
+RUN apk add --update bash && rm -rf /var/cache/apk/*

readme.md

@@ -1,40 +1,23 @@
 # Minimal Java Runtime Environment
 
-Good to go for Play Framework apps and other stuff, of course.
+Good to go for **Play Framework** apps and other stuff, of course.
 
-## Latest addition: OpenJDK JRE 8
-
-Less than 150 MB. Image: `cloudunder/java-runtime:openjdk8`
-
-## JRE 7
-
-A very small Docker image with a Java Runtime Environment (OpenJDK 7) based on [Alpine Linux](https://registry.hub.docker.com/u/gliderlabs/alpine/). We also installed the Bash shell, because we want to use this as a base image for [Play Framework](https://www.playframework.com) web applications and the standard start script of a Play app is a Bash script.
-
-Of course, this image is not limited to Play apps, but that’s what we use it for.
+> Since the [official Java repository on Docker Hub](https://hub.docker.com/_/java/) now also has minimal images based on Alpine Linux, there is not much point in maintaining this repository any longer.
 
 * [Image on Docker Hub](https://registry.hub.docker.com/u/cloudunder/java-runtime/)
 * [Source on GitHub](https://github.com/CloudUnder/dockerfile-java-runtime)
 
-## JRE 8
+## OpenJDK JRE 8 (including Bash)
 
-Unfortunately a not quite so small Docker image with a Java Runtime Environment 8 (Oracle JRE) on CentOS 7.
+Less than 120 MB image: `cloudunder/java-runtime:openjdk8`
 
-Of course, this image is not limited to Play apps, but that’s what we use it for.
+> The only difference to the official `java:8-jre-alpine` image is that this one has **bash** installed, which is handy to start a Play application using the bash script that comes with a build (e.g. `sbt stage`).
 
-* [Image on Docker Hub](https://registry.hub.docker.com/u/cloudunder/java-runtime/)
-* [Source on GitHub](https://github.com/CloudUnder/dockerfile-java-runtime)
+## JRE 7
 
-## Size comparison
+> No longer maintained.
 
-```
-REPOSITORY                  TAG               IMAGE ID         VIRTUAL SIZE
-cloudunder/java-runtime     openjdk8          5f6d87db84a4     146.5 MB
-cloudunder/java-runtime     7                 dc871d857866     123.5 MB
-cloudunder/java-runtime     8                 e0cde27ac86a     441.5 MB
-jeanblanchard/busybox-java  7                 f36e3fd69366     146.5 MB
-java                        openjdk-7-jre     44faa7b2809f     332.3 MB
-dockerfile/java             openjdk-7-jre     d97696b2fb1b     684.4 MB
-```
+A very small Docker image with a Java Runtime Environment (OpenJDK 7) based on [Alpine Linux](https://registry.hub.docker.com/u/gliderlabs/alpine/). We also installed the Bash shell, because we want to use this as a base image for [Play Framework](https://www.playframework.com) web applications and the standard start script of a Play app is a Bash script.
 
 ## How to use this image
 
@@ -51,10 +34,7 @@ docker run --rm cloudunder/java-runtime:7 java -version
 A sample `Dockerfile` for a Play Framework application:
 
 ```
-# If you want Java 7:
-# FROM cloudunder/java-runtime:7
-# Or if you want Java 8:
-FROM cloudunder/java-runtime:8
+FROM cloudunder/java-runtime:openjdk8
 
 WORKDIR /app
 COPY target/universal/stage/ .
@@ -84,7 +64,3 @@ docker run -p 80:9000 -t yourappimagename
 ```
 
 Now you should be able to open the app in your browser.
-
-## Experimental
-
-All this is still experimental, so use with care. Any suggestions are also welcome!