Question

我有一个docker compose正在努力创建一个具有1个主节点和2个数据节点的弹性搜索节点集群，如下所示，但我想知道如何扩展它以添加更多主节点，因为仍有单点如果主节点发生故障，则使用此设置失败。

更具体地说，第二主节点如何与主机和主机进行交互。应用程序使用它？您是否必须绑定到主机上的另一个端口以用于第二个主节点？然后应用程序是否必须通过负载均衡器来处理任何一个主要噪声下降的情况？

elasticsearch_master:
  image: elasticsearch:latest
  command: "elasticsearch -Des.cluster.name=vi -Des.node.master=true -Des.node.data=false"
  ports:
    - "9200:9200"
    - "9300:9300"

elasticsearch1:
  image: elasticsearch:latest
  command: "elasticsearch -Des.cluster.name=vi -Des.discovery.zen.ping.unicast.hosts=elasticsearch_master"
  links:
    - elasticsearch_master
  volumes:
    - "~/esdata:/usr/share/elasticsearch/data"

elasticsearch2:
  image: elasticsearch:latest
  command: "elasticsearch -Des.cluster.name=vi -Des.discovery.zen.ping.unicast.hosts=elasticsearch_master"
  links:
    - elasticsearch_master
  volumes:
    - "~/esdata:/usr/share/elasticsearch/data"

Answer 1

我知道我们的做法不一样，但这是一个对我有用的代码示例。

services:
  esmaster1:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.3.2
    container_name: esmaster1
    environment:
      - cluster.name=es_cluster
      - bootstrap.memory_lock=true
      - http.cors.enabled=true
      - "http.cors.allow-origin=*"
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "discovery.zen.ping.unicast.hosts=esmaster1,esmaster2"
      - "node.master=true"
      - "node.data=true"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - esdata1:/home/ruan/workspace/docker/elasticsearch/data

  esmaster2:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.3.2
    container_name: esmaster2
    environment:
      - cluster.name=es_cluster
      - bootstrap.memory_lock=true
      - http.cors.enabled=true
      - "http.cors.allow-origin=*"
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "discovery.zen.ping.unicast.hosts=esmaster1,esmaster2"
      - "node.master=true"
      - "node.data=true"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - esdata2:/home/ruan/workspace/docker/elasticsearch/data

  elasticsearch1:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.3.2
    container_name: elasticsearch1
    environment:
      - cluster.name=es_cluster
      - bootstrap.memory_lock=true
      - http.cors.enabled=true
      - "http.cors.allow-origin=*"
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "discovery.zen.ping.unicast.hosts=esmaster1,esmaster2"
      - "node.master=false"
      - "node.data=true"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - esdata3:/home/ruan/workspace/docker/elasticsearch/data

  elasticsearch2:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.3.2
    container_name: elasticsearch2
    environment:
      - cluster.name=es_cluster
      - bootstrap.memory_lock=true
      - http.cors.enabled=true
      - "http.cors.allow-origin=*"
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "discovery.zen.ping.unicast.hosts=esmaster1,esmaster2"
      - "node.master=false"
      - "node.data=true"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - esdata4:/home/ruan/workspace/docker/elasticsearch/data

volumes:
  esdata1:
    driver: local
  esdata2:
    driver: local
  esdata3:
    driver: local
  esdata4:
    driver: local

如果主节点去世，则第二个接管，成为主节点并处理集群。如果要使用Kibana（或任何其他可视化工具），则还应该向集群添加另一个Elasticsearch实例以处理该连接。这个新实例不必是主节点，数据节点或摄取节点。

我希望这会有所帮助！

如何在docker compose中设置具有多个主节点的弹性搜索集群？

1 个答案: