An example Dockerfile for a Java webapp + a few dependencies:

• JDK 8
• Nginx
• git 1.7
• Maven 3.1.1

Prerequisites

I assume you have installed Docker and it is running.

See the Docker website for installation instructions.

Build

Steps to build a Docker image:

1. Clone this repo

    git clone https://github.com/cb372/docker-sample.git
   

2. Manually download JDK 8u20 (x64 rpm) from the Oracle site

3. Copy the JDK rpm to the appropriate folder

    cd docker-sample
    mkdir jdk
    cp ~/Downloads/jdk-8u20-linux-x64.rpm jdk
   

4. Build the image

    cd ..
    docker build -t="my-app" docker-sample
   

   This will take a few minutes.

5. Run the image's default command, which should start everything up. The -p option forwards the container's port 80 to port 8000 on the host. (Note that the host will actually be a guest if you are using boot2docker, so you may need to re-forward the port in VirtualBox.)

    docker run -p="8000:80" my-app
   

6. Once everything has started up, you should be able to access the webapp via http://localhost:8000/ on your host machine.

    open http://localhost:8000/
   

You can also login to the image and have a look around:

docker run -i -t my-app /bin/bash