Quick 3-node CockroachDB cluster via Docker Compose

docker-compose.yml

version: "3.7"

services:
  node01:
    image: cockroachdb/cockroach:v20.2.1
    volumes:
      - /data/crdb/node01:/cockroach/cockroach-data
    command: start --insecure --logtostderr --join=node02,node03
    ports:
      - 8080:8080
      - 26257:26257
    restart: on-failure
  node02:
    image: cockroachdb/cockroach:v20.2.1
    volumes:
      - /data/crdb/node02:/cockroach/cockroach-data
    command: start --insecure --logtostderr --join=node01,node03
    restart: on-failure
  node03:
    image: cockroachdb/cockroach:v20.2.1
    volumes:
      - /data/crdb/node03:/cockroach/cockroach-data
    command: start --insecure --logtostderr --join=node01,node02
    restart: on-failure


# when docker compose gets everything up for the first time:
#
# docker run -it --rm --network=crdb_default cockroachdb/cockroach:v20.2.1 init --host=node01 --insecure