Changes jre image to OpenJDK-JRE

Dockerfile

@@ -1,14 +1,10 @@
-FROM openjdk:8-jdk-alpine
+FROM openjdk:8-jre-alpine
 MAINTAINER OpenZipkin "http://zipkin.io/"
 
-# Remove 40M worth of SDK things, but link back /usr/local/java/bin to help tools
-# that auto-detect JAVA_HOME.
-RUN rm -rf /usr/local/java/bin /usr/local/java/lib /usr/local/java/include
-
 # Setup curl for convenience as all derivative images use it, and putting
 # it in one layer (via squash) is helpful
 RUN apk add --update --no-cache curl
 
 # Java relies on /etc/nsswitch.conf. Put host files first or InetAddress.getLocalHost
 # will throw UnknownHostException as the local hostname isn't in DNS.
-RUN echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf
+RUN echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf

README.md

@@ -1,7 +1,7 @@
-`openzipkin/jre-full` is a minimal but full JRE Docker image based on [cantara/alpine-zulu-jdk8](https://github.com/Cantara/maven-infrastructure/tree/master/docker-baseimages/alpine-zulu-jdk8). It's created by removing the JDK and leaving only the JRE, then squashing the Docker image.
+`openzipkin/jre-full` is a minimal but full JRE Docker image based on [openjdk:8-jre-alpine](https://github.com/docker-library/openjdk/blob/master/8/jdk/alpine/Dockerfile). 
 
 On Dockerhub: [openzipkin/jre-full](https://hub.docker.com/r/openzipkin/jre-full/)
 
 ## Release process
 
-New versions are built on [Travis CI](https://travis-ci.org/openzipkin/docker-jre-full). To trigger a build, push a new tag to GitHub. The tag will be the Docker tag assigned to the newly built image. Since `cantara/alpine-zulu-jdk8` only pushes latest, name the tag according to the JDK in use. For example `1.8.0_112`.
+New versions are built on [Travis CI](https://travis-ci.org/openzipkin/docker-jre-full). To trigger a build, push a new tag to GitHub. The tag will be the Docker tag assigned to the newly built image. Name the tag according to the JDK in use. For example `1.8.0_112`.

release.sh

@@ -13,12 +13,7 @@ if [[ $# -ne 1 ]]; then
 fi
 version="$1"
 tag="openzipkin/jre-full:$version"
-fat_tag="${tag}-fat"
 
-docker_squash="$(which docker-squash)"
-
-docker build -t "$fat_tag" .
-
-docker-squash -t "$tag" "$fat_tag"
+docker build --squash -t "$tag" .
 
 docker push "$tag"