add openjdk container

Signed-off-by: Wang, Long <long1.wang@intel.com>

.travis.yml

@@ -19,6 +19,7 @@ env:
   - DOCKERFILE_DIR=mixer-ci
   - DOCKERFILE_DIR=nginx
   - DOCKERFILE_DIR=node
+  - DOCKERFILE_DIR=openjdk
   - DOCKERFILE_DIR=php
   - DOCKERFILE_DIR=postgres
   - DOCKERFILE_DIR=python

openjdk/Dockerfile

@@ -0,0 +1,10 @@
+FROM clearlinux:latest
+MAINTAINER long1.wang@intel.com
+
+ARG swupd_args
+
+RUN swupd update --no-boot-update $swupd_args && \
+    swupd bundle-add java-runtime $swupd_args && \
+    rm -rf /var/lib/swupd
+
+CMD ["java"]

openjdk/README.md

@@ -0,0 +1,37 @@
+openjdk
+==========
+This provides a Clear Linux* openjdk container
+
+Build
+-----
+```
+docker build -t clearlinux/openjdk .
+```
+
+Or just pull it from Dockerhub
+---------------------------
+```
+docker pull clearlinux/openjdk
+```
+
+Compile your java app inside the Docker container
+-----------------------
+```
+docker run --rm -it --name myapp -v "$PWD":/usr/src/myapp -w /usr/src/myapp clearlinux/openjdk javac myapp.java
+```
+
+Run your java app instance
+-----------------------
+```
+docker run --rm -it --name myapp -v "$PWD":/usr/src/myapp -w /usr/src/myapp clearlinux/openjdk java myapp
+```
+
+Details of how-to
+---------------------
+- Please refer to the docker official openjdk image [page](https://hub.docker.com/_/openjdk).
+
+Extra Build ARGs
+----------------
+- ``swupd_args`` Specifies [SWUPD](https://github.com/clearlinux/swupd-client/blob/master/docs/swupd.1.rst#options) flags
+
+Default build args in Docker are on: https://docs.docker.com/engine/reference/builder/#arg