Dockerfile

FROM openjdk:8

MAINTAINER Evoniners <dev@evonove.it>

ENV SCALA_VERSION 2.11
ENV KAFKA_VERSION 0.10.1.0
ENV KAFKA_PATH kafka/${KAFKA_VERSION}/kafka_${SCALA_VERSION}-${KAFKA_VERSION}.tgz
ENV KAFKA_HOME /opt/kafka

# download the jq package to parse the json on the command line
RUN apt-get update && apt-get install -y \
    jq \
 && rm -rf /var/lib/apt/lists/*

# download kafka and unpack it into /opt
# the first line parse the json and returns the preferred apache mirror
RUN APACHE_MIRROR=$(curl -s 'https://www.apache.org/dyn/closer.cgi?as_json=1' | jq --raw-output '.preferred') \
    && curl -SL ${APACHE_MIRROR}${KAFKA_PATH} | tar -zxC /opt/ \
    && mv /opt/kafka_${SCALA_VERSION}-${KAFKA_VERSION} ${KAFKA_HOME}

# copy the kafka config file template into config directory
COPY ./server.properties.tmpl ${KAFKA_HOME}/config/

# copy the startup script in the kafka home directory
COPY ./start.sh ${KAFKA_HOME}

EXPOSE 9092

WORKDIR ${KAFKA_HOME}

CMD ["./start.sh"]