3 node cassandra cluster with docker-compose

docker-compose-cassandra-cluster.yml

version: "3.3"

# make sure that docker machine has enough memory to run the cluster.
# setting it up to 4GB seems to work.

services:

  cassandra-seed:
    image: cassandra:latest
#    ports:
#      - "9042:9042"
    volumes:
      - "cassandra_data_seed:/var/lib/cassandra"
    environment:
      - "CASSANDRA_SEEDS=cassandra-seed"
      - "CASSANDRA_CLUSTER_NAME=Test Cluster"
#      needed for setting up custom cluster name
      - "CASSANDRA_DC=se1"
      - "CASSANDRA_ENDPOINT_SNITCH=GossipingPropertyFileSnitch"
#    restart: always


  cassandra1:
    image: cassandra:latest
    volumes:
      - "cassandra_data_1:/var/lib/cassandra"
    environment:
      - "CASSANDRA_SEEDS=cassandra-seed"
      - "CASSANDRA_CLUSTER_NAME=Test Cluster"
#      needed for setting up custom cluster name
      - "CASSANDRA_DC=se1"
      - "CASSANDRA_ENDPOINT_SNITCH=GossipingPropertyFileSnitch"
    depends_on:
      - cassandra-seed
#    restart: always

  cassandra2:
    image: cassandra:latest
    volumes:
      - "cassandra_data_2:/var/lib/cassandra"
    environment:
      - "CASSANDRA_SEEDS=cassandra-seed"
      - "CASSANDRA_CLUSTER_NAME=Test Cluster"
#      needed for setting up custom cluster name
      - "CASSANDRA_DC=se1"
      - "CASSANDRA_ENDPOINT_SNITCH=GossipingPropertyFileSnitch"
    depends_on:
      - cassandra-seed
#    restart: always

volumes:
  cassandra_data_seed:
  cassandra_data_1:
  cassandra_data_2: