docker-compose-cluster.yml

# Please note we are using Docker Compose version 3
version: '3'
networks:
    wlring:
services:
    # seed_node is the first node that gets bootstrapped
    # .i.e Node 1 in Data center 1.
    seed_node:
        build: cassandra
        environment: 
            - DATACENTER=WATERL00
            - CLUSTERNAME=lens
        container_name: node00
        hostname: node00
        networks:
            - wlring
        # Exposing ports for inter cluste communication
        expose:
            - 7000 # Intra-node communication
            - 7001 # TLS intra-node communication
            - 7199 # JMX
            - 9042 # CQL
            - 9160 # Thrift service
        ulimits:
            memlock: -1

    nodeops:
        build: opscenter
        container_name: nodeops
        hostname: ops
        ports:
            - "8888:8888"
            - "61620:61620"
        networks:
            - wlring

########################################################################################### 
# 
    # next_node is the subsequent (second, third etc.) node that gets bootstrapped to join seed_node
    next_node:
        build: cassandra
        environment: 
            - DATACENTER=WATERL00
            - CLUSTERNAME=lens
        networks:
            - wlring
        depends_on:
              - seed_node
        expose:
            - 7000
            - 7001
            - 7199
            - 9042
            - 9160
        ulimits:
            memlock: -1