在Linux环境下搭建ElasticSearch集群

港控/mmm° 2022-05-26 07:35 257阅读 0赞

### 前提准备 ###

能在Linux中成功运行单机的ElasticSearch服务

### 搭建概要 ###

本次试验实3台机器上分别部署一个ElasticSearch服务做成集群

### elasticsearch.yml配置 ###

############ES1###############
    cluster.name: my-application
    node.name: node-1
    network.host: 192.168.176.128
    http.port: 9200
    #集群个节点IP地址，也可以使用els、els.shuaiguoxia.com等名称，需要各节点能够解析
    discovery.zen.ping.unicast.hosts: ["192.168.176.128","192.168.176.129","192.168.176.131"]
    #为了避免脑裂，集群节点数最少为 半数+1
    discovery.zen.minimum_master_nodes: 2
    
    ############ES2###############
    cluster.name: my-application
    node.name: node-2
    network.host: 192.168.176.129
    http.port: 9200
    discovery.zen.ping.unicast.hosts: ["192.168.176.128","192.168.176.129","192.168.176.131"]
    discovery.zen.minimum_master_nodes: 2
    
    ############ES3###############
    cluster.name: my-application
    node.name: node-3
    network.host: 192.168.176.131
    http.port: 9200
    discovery.zen.ping.unicast.hosts: ["192.168.176.128","192.168.176.129","192.168.176.131"]
    discovery.zen.minimum_master_nodes: 2

全部启动成功后，访问  
[http://192.168.176.128:9200/\_cat/nodes?pretty][http_192.168.176.128_9200_cat_nodes_pretty]  
返回结果（\*号表示为当前节点为主节点的意思）：  
192.168.176.128 29 92 17 0.17 0.16 0.14 mdi - node-2  
192.168.176.129 11 93 7 0.74 0.55 0.41 mdi \* node-1  
192.168.176.131 11 93 4 0.52 0.34 0.29 mdi - node-3

通过API（[http://192.168.176.128:9200/\_cluster/health?pretty][http_192.168.176.128_9200_cluster_health_pretty]）可以查看集群的状态，通常集群的状态分为三种：  
• Red，表示有主分片没有分配，某些数据不可用。  
• Yellow，表示主分片都已分配，数据都可用，但是有复制分片没有分配。  
• Green，表示主分片和复制分片都已分配，一切正常。

\{  
“cluster\_name” : “my-application”,  
“status” : “green”,  
“timed\_out” : false,  
“number\_of\_nodes” : 3,  
“number\_of\_data\_nodes” : 3,  
“active\_primary\_shards” : 5,  
“active\_shards” : 10,  
“relocating\_shards” : 0,  
“initializing\_shards” : 0,  
“unassigned\_shards” : 0,  
“delayed\_unassigned\_shards” : 0,  
“number\_of\_pending\_tasks” : 0,  
“number\_of\_in\_flight\_fetch” : 0,  
“task\_max\_waiting\_in\_queue\_millis” : 0,  
“active\_shards\_percent\_as\_number” : 100.0  
\}

![集群搭建过程][70]

[http_192.168.176.128_9200_cat_nodes_pretty]: http://192.168.176.128:9200/_cat/nodes?pretty
[http_192.168.176.128_9200_cluster_health_pretty]: http://192.168.176.128:9200/_cluster/health?pretty
[70]: /images/20220526/2ccb987b7c554a80a3fe4cde37e48697.png