Elastic in Docker

• Docker images are build using Dockerfile definitions

• E.g. hello-world image:

  FROM scratch
  COPY hello /
  CMD ["/hello"]

• Where 'scratch' is name:tag of base image, in this case most basic image 'scratch:latest'

• 'COPY' command copies executable file 'hello' to the root of file system

• 'CMD' is command executed when container is running

• Official Elastic Search Dockerfile is not as simple

• To run official image:

  sudo docker run -d -p 9201:9200 -e "http.host=0.0.0.0" -e "transport.host=127.0.0.1" docker.elastic.co/elasticsearch/elasticsearch:5.4.1

• -d: run in a detached mode

• -e: define listener ip for API and for cluster communication

• -p: map host port to container port