elasticsearch集群搭建

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现有两部机器：`192.168.31.86，192.168.31.87`  
1、注意事项  
集群需要在同一网段

2、配置elasticsearch.yml

cluster.name ：配置es的集群名称，不同的集群用名字来区分， 如果在同一网段下有多个集群，就可以用这个属性来区分不同的集群。
     
    node.name：节点名称，一部服务器一个节点，分别为node-1，node-2，node-3 。
     
    http.port ：服务端口，一般默认是9200，如果在同一部服务器上面配置多个elasticsearch服务，则端口需要不同
     
    discovery.zen.ping.unicast.hosts：自动检索可用节点，设置了这个参数才会自动检测可用的节点。 同一集群名下，elasticsearch会自动去发现其他的节点。

具体配置：

192.168.31.86：
    cluster.name: mycluster
    node.name: node-1
    #指定了该节点可能成为 master 节点，还可以是数据节点
    node.master: true
    node.data: true
    network.host: 192.168.31.86
    http.port: 9200
    transport.tcp.port: 9300
    discovery.zen.ping.unicast.hosts: ["192.168.31.86", "192.168.31.87"]
    
    
    
    192.168.31.87：
    cluster.name: mycluster
    node.name: node-2
    #指定了该节点可能成为 master 节点，还可以是数据节点
    node.master: true
    node.data: true
    network.host: 192.168.31.87
    http.port: 9200
    transport.tcp.port: 9300
    discovery.zen.ping.unicast.hosts: ["192.168.31.86", "192.168.31.87"]

然后分别启动两个节点的ES服务。

安装Head  
Head是一个用来监控Elasticsearch状态的客户端插件。

检查两个节点的情况：

192.168.31.86：
    [zsz@zsz elasticsearch-2.3.2]$ curl '192.168.31.86:9200/_cat/indices?v'
    health status index    pri rep docs.count docs.deleted store.size pri.store.size
    green  open   myindex    5   1        163            0      294kb          147kb
    green  open   customer   5   1          0            0      1.5kb           795b 
     
    
    192.168.31.87：
    [zsz@VS-SUPSV-TEST1 elasticsearch-2.3.2]$ curl '192.168.31.87:9200/_cat/indices?v'
    health status index    pri rep docs.count docs.deleted store.size pri.store.size
    green  open   myindex    5   1        163            0      294kb          147kb
    green  open   customer   5   1          0            0      1.5kb           795b

发现是GREEN的绿色健康状态，说明备份被分配完成，可用。集群配置完成。

测试集群中两个节点的查询情况：

[zsz@zsz ~]$ curl '192.168.31.87:9200/myindex/_search?q=ghdfdfgddfg'
    {"took":13,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":0.49305484,"hits":[{"_index":"myindex","_type":"mytype","_id":"AVeoqjX_-bv4eY7Nx-xL","_score":0.49305484,"_source":{"pk":14,"user_pk":10,"media_pk":2,"topic_pk":0,"access_source_pk":0,"p_channel_pk":0,"c_channel_pk":0,"title":"ghdfdfgddfg","cover_url":{"S":["http://ochz1y8tu.bkt.clouddn.com/lg-6Q2Cy2yjF_SqLSo5YaKJKx2E520160829102601_2.jpg"],"L":["http://ochz1y8tu.bkt.clouddn.com/lg-6Q2Cy2yjF_SqLSo5YaKJKx2E520160829102601_1.jpg"]},"summary":"\"好奇号\"发回火星最新影像 地貌酷似地球","read_count":0,"like_count":0,"share_count":0,"favorites_count":0,"check_status":3,"release_status":1,"isurgent":1,"created_at":"2016-08-15T14:07:19.000+08:00","updated_at":"2016-10-04T10:11:56.000+08:00"}}]}}
    
    
    
    [zsz@zsz ~]$ curl '192.168.31.86:9200/myindex/_search?q=ghdfdfgddfg'
    {"took":5,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":0.49305484,"hits":[{"_index":"myindex","_type":"mytype","_id":"AVeoqjX_-bv4eY7Nx-xL","_score":0.49305484,"_source":{"pk":14,"user_pk":10,"media_pk":2,"topic_pk":0,"access_source_pk":0,"p_channel_pk":0,"c_channel_pk":0,"title":"ghdfdfgddfg","cover_url":{"S":["http://ochz1y8tu.bkt.clouddn.com/lg-6Q2Cy2yjF_SqLSo5YaKJKx2E520160829102601_2.jpg"],"L":["http://ochz1y8tu.bkt.clouddn.com/lg-6Q2Cy2yjF_SqLSo5YaKJKx2E520160829102601_1.jpg"]},"summary":"\"好奇号\"发回火星最新影像 地貌酷似地球","read_count":0,"like_count":0,"share_count":0,"favorites_count":0,"check_status":3,"release_status":1,"isurgent":1,"created_at":"2016-08-15T14:07:19.000+08:00","updated_at":"2016-10-04T10:11:56.000+08:00"}}]}}

测试192.168.31.86节点对数据修改后，两个节点的数据是否同步

[zsz@zsz ~]$ curl -XPOST '192.168.31.86:9200/myindex/mytype/AVeoqjX_-bv4eY7Nx-xL/_update?pretty' -d '{        
              "doc": { "summary ": "TEST UPDATE DATA" }
            }'
    {
      "_index" : "myindex",
      "_type" : "AVeoqjX_-bv4eY7Nx-xL",
      "_id" : "_update",
      "_version" : 1,
      "_shards" : {
        "total" : 2,
        "successful" : 2,
        "failed" : 0
      },
      "created" : true
    }
    
    
    
    [zsz@zsz ~]$ curl '192.168.31.86:9200/myindex/_search?q=ghdfdfgddfg'
    {"took":5,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":0.44561866,"hits":[{"_index":"myindex","_type":"mytype","_id":"AVeoqjX_-bv4eY7Nx-xL","_score":0.44561866,"_source":{"pk":14,"user_pk":10,"media_pk":2,"topic_pk":0,"access_source_pk":0,"p_channel_pk":0,"c_channel_pk":0,"title":"ghdfdfgddfg","cover_url":{"S":["http://ochz1y8tu.bkt.clouddn.com/lg-6Q2Cy2yjF_SqLSo5YaKJKx2E520160829102601_2.jpg"],"L":["http://ochz1y8tu.bkt.clouddn.com/lg-6Q2Cy2yjF_SqLSo5YaKJKx2E520160829102601_1.jpg"]},"summary":"\"好奇号\"发回火星最新影像 地貌酷似地球","read_count":0,"like_count":0,"share_count":0,"favorites_count":0,"check_status":3,"release_status":1,"isurgent":1,"created_at":"2016-08-15T14:07:19.000+08:00","updated_at":"2016-10-04T10:11:56.000+08:00","summary ":"TEST UPDATE DATA"}}]}}
    
    
    
    [zsz@zsz ~]$ curl '192.168.31.87:9200/myindex/_search?q=ghdfdfgddfg'
    {"took":2,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":0.44561866,"hits":[{"_index":"myindex","_type":"mytype","_id":"AVeoqjX_-bv4eY7Nx-xL","_score":0.44561866,"_source":{"pk":14,"user_pk":10,"media_pk":2,"topic_pk":0,"access_source_pk":0,"p_channel_pk":0,"c_channel_pk":0,"title":"ghdfdfgddfg","cover_url":{"S":["http://ochz1y8tu.bkt.clouddn.com/lg-6Q2Cy2yjF_SqLSo5YaKJKx2E520160829102601_2.jpg"],"L":["http://ochz1y8tu.bkt.clouddn.com/lg-6Q2Cy2yjF_SqLSo5YaKJKx2E520160829102601_1.jpg"]},"summary":"\"好奇号\"发回火星最新影像 地貌酷似地球","read_count":0,"like_count":0,"share_count":0,"favorites_count":0,"check_status":3,"release_status":1,"isurgent":1,"created_at":"2016-08-15T14:07:19.000+08:00","updated_at":"2016-10-04T10:11:56.000+08:00","summary ":"TEST UPDATE DATA"}}]}}

在192.168.31.86机器上更新的数据，分别查询192.168.31.86和192.168.31.87，发觉数据是同步了的。elasticsearch集群自我完成了实时同步。

常见问题：  
1、问题报错：no rute to host  
解决方案：由于端口没开启，处理办法  
（1）关闭服务器防火墙，不推荐。  
（2）开放端口：

/sbin/iptables -I INPUT -p tcp --dport 9200 -j ACCEPT
    /sbin/iptables -I INPUT -p tcp --dport 9300 -j ACCEPT
    /etc/rc.d/init.d/iptables save
    /etc/rc.d/init.d/iptables restart
    /etc/init.d/iptables status

本文出处：[https://www.cnblogs.com/zhongshengzhen/p/elasticsearch\_cluster.html][https_www.cnblogs.com_zhongshengzhen_p_elasticsearch_cluster.html]

[https_www.cnblogs.com_zhongshengzhen_p_elasticsearch_cluster.html]: https://www.cnblogs.com/zhongshengzhen/p/elasticsearch_cluster.html