Docker Minecraft Server

Dockerfile

FROM centos:latest

MAINTAINER jjahn

# UPDATE
RUN yum -y update

# Install Java and GNU Build Tools
RUN yum -y install java-1.8.0-openjdk
RUN yum -y groupinstall "Development Tools"

# Default minecraft port
EXPOSE 25565

# Add the start script to the container
ADD start.sh /start
RUN chmod a+x /start

# Where the minecraft data will be stored
VOLUME ['/data']
WORKDIR /data

# The command run when the contianer starts
CMD /start

# Environment variables used by the start command
ENV MOTD Jahn Digital Minecraft Server
ENV LEVEL world
ENV JVM_OPTS -Xmx1024M -Xms1024M
ENV VERSION 1.7.10
ENV EULA true

start.sh

#!/bin/sh

cd /data

if [ ! -e minecraft_server.jar ]; then
    >&2 echo "Unable to locate minecraft_server.jar.  Please place it in the path you mounted to /data and try again."
    exit 1
fi

if [ ! -e server.properties ]; then
    cp /tmp/server.properties .
fi

if [ -n "$MOTD" ]; then
    sed -i "/motd\s*=/ c motd=$MOTD" /data/server.properties
fi

if [ -n "$LEVEL" ]; then
    sed -i "/level-name\s*=/ c level-name=$LEVEL" /data/server.properties
fi

if [ -n "$OPS" ]; then
    echo $OPS | tr , '\n' > ops.txt
fi

if [ ! -e /data/eula.txt ]; then
    if [ "$EULA" != "" ]; then
        echo "# Generated via Docker on $(date)" > eula.txt
        echo "eula=$EULA" >> eula.txt
    else
        echo ""
        echo "Please accept the Minecraft EULA at"
        echo "  https://account.mojang.com/documents/minecraft_eula"
        echo "by adding the following immediately after 'docker run':"
        echo "  -e EULA=TRUE"
        echo ""
        exit 1
    fi
fi

java $JVM_OPTS -jar minecraft_server.jar nogui