docker-compose.yml

version: '2'

services:
  roach-ui:
    image: cockroachdb/cockroach:beta-20161215
    command: start --insecure
    ports:
      - 8080:8080
    networks:
        - roachnet
    volumes:
      - ./data/roach-ui:/cockroach/cockroach-data
  roach-one:
    image: cockroachdb/cockroach:beta-20161215
    command: start --insecure --join=roach-ui
    networks:
        - roachnet
    volumes:
      - ./data/roach-one:/cockroach/cockroach-data
  roach-two:
    image: cockroachdb/cockroach:beta-20161215
    command: start --insecure --join=roach-ui
    networks:
        - roachnet
    volumes:
      - ./data/roach-two:/cockroach/cockroach-data
  roach-three:
    image: cockroachdb/cockroach:beta-20161215
    command: start --insecure --join=roach-ui
    networks:
        - roachnet
    volumes:
      - ./data/roach-three:/cockroach/cockroach-data
  roach-four:
    image: cockroachdb/cockroach:beta-20161215
    command: start --insecure --join=roach-ui
    networks:
        - roachnet
    volumes:
      - ./data/roach-four:/cockroach/cockroach-data

networks:
  roachnet:

Create a test cockroach cluster with docker-compose

Command to sql interface
docker-compose exec roach1 ./cockroach sql