elasticsearch集羣搭建

現有兩部機器：192.168.31.86，192.168.31.87
1、注意事項
集羣需要在同一網段

2、配置elasticsearch.yml

cluster.name ：配置es的集羣名稱，不同的集羣用名字來區分， 如果在同一網段下有多個集羣，就可以用這個屬性來區分不同的集羣。
 
node.name：節點名稱，一部服務器一個節點，分別爲node-1，node-2，node-3 。
 
http.port ：服務端口，一般默認是9200，如果在同一部服務器上面配置多個elasticsearch服務，則端口需要不同
 
discovery.zen.ping.unicast.hosts：自動檢索可用節點，設置了這個參數纔會自動檢測可用的節點。 同一集羣名下，elasticsearch會自動去發現其他的節點。

具體配置：

192.168.31.86：
cluster.name: mycluster
node.name: node-1
#指定了該節點可能成爲 master 節點，還可以是數據節點
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
#指定了該節點可能成爲 master 節點，還可以是數據節點
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"]

然後分別啓動兩個節點的ES服務。

安裝Head
Head是一個用來監控Elasticsearch狀態的客戶端插件。

檢查兩個節點的情況：

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 

發現是GREEN的綠色健康狀態，說明備份被分配完成，可用。集羣配置完成。

測試集羣中兩個節點的查詢情況：

[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":"\"好奇號\"發回火星最新影像 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":"\"好奇號\"發回火星最新影像 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"}}]}}

測試192.168.31.86節點對數據修改後，兩個節點的數據是否同步

[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":"\"好奇號\"發回火星最新影像 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":"\"好奇號\"發回火星最新影像 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機器上更新的數據，分別查詢192.168.31.86和192.168.31.87，發覺數據是同步了的。elasticsearch集羣自我完成了實時同步。

常見問題：
1、問題報錯：no rute to host
解決方案：由於端口沒開啓，處理辦法
（1）關閉服務器防火牆，不推薦。
（2）開放端口：

/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 

本文出處：https://www.cnblogs.com/zhongshengzhen/p/elasticsearch_cluster.html