Dockerfile

FROM java:8-jre

# grab gosu for easy step-down from root
RUN gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4
RUN arch="$(dpkg --print-architecture)" \
	&& set -x \
	&& curl -o /usr/local/bin/gosu -SL "https://github.com/tianon/gosu/releases/download/1.3/gosu-$arch" \
	&& curl -o /usr/local/bin/gosu.asc -SL "https://github.com/tianon/gosu/releases/download/1.3/gosu-$arch.asc" \
	&& gpg --verify /usr/local/bin/gosu.asc \
	&& rm /usr/local/bin/gosu.asc \
	&& chmod +x /usr/local/bin/gosu

# http://www.logstash.net/docs/1.4.2/repositories
# http://packages.elasticsearch.org/GPG-KEY-elasticsearch
RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys 46095ACC8548582C1A2699A9D27D666CD88E42B4

ENV LOGSTASH_MAJOR 1.5
ENV LOGSTASH_VERSION 1:1.5.3-1

RUN echo "deb http://packages.elasticsearch.org/logstash/${LOGSTASH_MAJOR}/debian stable main" > /etc/apt/sources.list.d/logstash.list

RUN set -x \
	&& apt-get update \
	&& apt-get install -y --no-install-recommends logstash=$LOGSTASH_VERSION \
	&& rm -rf /var/lib/apt/lists/*

ENV PATH /opt/logstash/bin:$PATH

COPY ./docker-entrypoint.sh /

ENTRYPOINT ["/docker-entrypoint.sh"]
CMD ["logstash"]