Running Elasticsearch with Docker - docker

Question

I installed Elasticsearch in my image based on ubuntu:16.04.
And start the service using
RUN service elasticsearch start
but, it was not started.
If I go into the container and run it, it starts.
I want to run the service and dump the index when I create the image, below is a part of my Dockerfile.
How do I start Elasticsearch in the Dockerfile?
#install OpenJDK-8
RUN apt-get update && apt-get install -y openjdk-8-jdk && apt-get install -y ant && apt-get clean
RUN apt-get update && apt-get install -y ca-certificates-java && apt-get clean
RUN update-ca-certificates -f
ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/
RUN export JAVA_HOME
#download ES
RUN wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | apt-key add -
RUN apt-get install -y apt-transport-https
RUN echo "deb https://artifacts.elastic.co/packages/6.x/apt stable main" | tee -a /etc/apt/sources.list.d/elastic-6.x.list
RUN apt-get update && apt-get install -y elasticsearch
RUN service elasticsearch start

Answer 1

The RUN command executes only during the build phase. It stops after the build is completed. You should use CMD (or ENTRYPOINT) instead:
CMD service elasticsearch start && /bin/bash
It's better wrapping the starting command in your own file and then only execute the file:
CMD /start_elastic.sh

Answer 2

I don't know why not take official oss image, but, this Docker file based on Debian work:
FROM java:8-jre
ENV ES_NAME=elasticsearch \
ELASTICSEARCH_VERSION=6.6.1
ENV ELASTICSEARCH_URL=https://artifacts.elastic.co/downloads/$ES_NAME/$ES_NAME-$ELASTICSEARCH_VERSION.tar.gz
RUN apt-get update && apt-get install -y --assume-yes openssl bash curl wget \
&& mkdir -p /opt \
&& echo '[i] Start create elasticsearch' \
&& wget -T 15 -O /tmp/$ES_NAME-$ELASTICSEARCH_VERSION.tar.gz $ELASTICSEARCH_URL \
&& tar -xzf /tmp/$ES_NAME-$ELASTICSEARCH_VERSION.tar.gz -C /opt/ \
&& ln -s /opt/$ES_NAME-$ELASTICSEARCH_VERSION /opt/$ES_NAME \
&& useradd elastic \
&& mkdir -p /var/lib/elasticsearch /opt/$ES_NAME/plugins /opt/$ES_NAME/config/scripts \
&& chown -R elastic /opt/$ES_NAME-$ELASTICSEARCH_VERSION/
ENV PATH=/opt/elasticsearch/bin:$PATH
USER elastic
CMD [ "/bin/sh", "-c", "/opt/elasticsearch/bin/elasticsearch --E cluster.name=test --E network.host=0 $ELASTIC_CMD_OPTIONS" ]
I believe most of the commands you'll be able to use on Ubuntu.
Don't forget to run sudo sysctl -w vm.max_map_count=262144 on your host