본문으로 건너뛰기

1. Docker와 사전준비

공홈에는 메모리 제한이 2기가 인데, 그걸로는 부족하다.
그래서 각각 4기가로 잡았다.
실제로 K8S에서도 노드당 4기가 정도는 잡아먹는다.

docker-compose.yml​

seed노드와 일반노드 따로따로 볼륨설정을 했다.

version: '2.4'
services:
  seed_node:
    image: "docker.io/strapdata/elassandra:6.8.4.3"
    environment:
      - "JVM_OPTS=-Dcassandra.custom_query_handler_class=org.elassandra.index.ElasticQueryHandler"
      - "MAX_HEAP_SIZE=1200m"
      - "HEAP_NEWSIZE=300m"
      - "CASSANDRA_CGROUP_MEMORY_LIMIT=true"
      - "DEBUG=true"
    cap_add:
      - IPC_LOCK
    ulimits:
      memlock: -1
    mem_limit: 4096m
    ports:
      - "9042:9042"
      - "9200:9200"
    volumes:
      - ./volume_data_seed_node:/var/lib/cassandra
  node:
    image: "docker.io/strapdata/elassandra:6.8.4.3"
    environment:
      - "JVM_OPTS=-Dcassandra.custom_query_handler_class=org.elassandra.index.ElasticQueryHandler"
      - "MAX_HEAP_SIZE=1200m"
      - "HEAP_NEWSIZE=300m"
      - "CASSANDRA_CGROUP_MEMORY_LIMIT=true"
      - "CASSANDRA_SEEDS=seed_node"
      - "DEBUG=true"
    links:
      - seed_node
    cap_add:
      - IPC_LOCK
    ulimits:
      memlock: -1
    mem_limit: 4096m
    volumes:
      - ./volume_data_node:/var/lib/cassandra

  kibana:
    image: docker.elastic.co/kibana/kibana-oss:6.8.4
    environment:
      - "ELASTICSEARCH_URL=http://seed_node:9200"
    ports:
      - "5601:5601"
    mem_limit: 500m

띄우고 확인​

docker-compose up -d

docker ps로 확인후 컨테이너 cqlsh 실행

docker exec -it 컨테이터명 cqlsh

# 이렇게 나와야함
cqlsh>

노드 상태 확인​

docker exec -i 컨테이너명 nodetool status

이런식으로 나온다.
DC1이라는 데이터센터에 r1이라는 하나의 랙 안에 노드가 2개 있는건데 사용율이 61.0과 39.0이라는 뜻

  • DC1이 소문자인지 대문자인지 확인 해놔야 한다.(접속할때 대소문자에 따라서 안됐던 기억이.. 정확하지는 않지만..)
Datacenter: DC1
===============
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address     Load       Tokens       Owns (effective)  Host ID                               Rack
UN  172.19.0.3  215.43 KiB  8            61.0%             de3873dc-0995-4236-b233-f5d5543713f0  r1
UN  172.19.0.4  180.42 KiB  8            39.0%             fb11cebe-7632-41a2-af6d-5ec116f11306  r1

M1 / M2 Silicon 일경우​

version: '2.4'
services:
  seed_node:
    image: "docker.io/strapdata/elassandra:6.8.4.3"
    restart: always
    platform: linux/amd64
    environment:
      - "JVM_OPTS=-Dcassandra.custom_query_handler_class=org.elassandra.index.ElasticQueryHandler"
      - "MAX_HEAP_SIZE=1200m"
      - "HEAP_NEWSIZE=300m"
      - "CASSANDRA_CGROUP_MEMORY_LIMIT=true"
      - "DEBUG=true"
    cap_add:
      - IPC_LOCK
    ulimits:
      memlock: -1
    mem_limit: 4096m
    ports:
      - "9042:9042"
      - "9200:9200"
    volumes:
      - ./volume_data_seed_node:/var/lib/cassandra
  node:
    image: "docker.io/strapdata/elassandra:6.8.4.3"
    restart: always
    platform: linux/amd64
    environment:
      - "JVM_OPTS=-Dcassandra.custom_query_handler_class=org.elassandra.index.ElasticQueryHandler"
      - "MAX_HEAP_SIZE=1200m"
      - "HEAP_NEWSIZE=300m"
      - "CASSANDRA_CGROUP_MEMORY_LIMIT=true"
      - "CASSANDRA_SEEDS=seed_node"
      - "DEBUG=true"
    links:
      - seed_node
    cap_add:
      - IPC_LOCK
    ulimits:
      memlock: -1
    mem_limit: 4096m
    volumes:
      - ./volume_data_node:/var/lib/cassandra

  kibana:
    image: docker.elastic.co/kibana/kibana-oss:6.8.4
    restart: always
    platform: linux/amd64
    environment:
      - "ELASTICSEARCH_URL=http://seed_node:9200"
    ports:
      - "5601:5601"
    mem_limit: 500m