Launch CockroachDB as a cluster of 3 nodes

cockroachdb-sandbox.docker-compose.yml

# A playground to test CockroachDB
#
# Launch:
# docker compose up
#
# Initialize the first time through the first node:
# docker compose exec first cockroach --host=first:26357 init --insecure
#
# Get dashboard URL from the second node:
# echo http://$(docker compose exec second hostname -i):8080/
#
# Access the SQL console through the third node:
# docker compose exec first cockroach sql --host=third:26257 --insecure
#

x-vars:
  tag: &image "cockroachdb/cockroach:v23.1.3"

services:
  first:
    image: *image
    volumes:
      - first:/cockroach/cockroach-data:rw
    command:
      - start
      - --advertise-addr=first:26357
      - --http-addr=first:8080
      - --listen-addr=first:26357
      - --sql-addr=first:26257
      - --insecure
      - --join=first:26357,second:26357,third:26357

  second:
    image: *image
    volumes:
      - second:/cockroach/cockroach-data:rw
    command:
      - start
      - --advertise-addr=second:26357
      - --http-addr=second:8080
      - --listen-addr=second:26357
      - --sql-addr=second:26257
      - --insecure
      - --join=first:26357,second:26357,third:26357

  third:
    image: *image
    volumes:
      - third:/cockroach/cockroach-data:rw
    command:
      - start 
      - --advertise-addr=third:26357
      - --http-addr=third:8080
      - --listen-addr=third:26357
      - --sql-addr=third:26257
      - --insecure
      - --join=first:26357,second:26357,third:26357

volumes:
  first:
  second:
  third: