- 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