192.168.30.121,192.168.30.122,192.168.30.123上配置elasticsearch集群：

1. 在所有主机上添加elk用户
   

2. 在所有主机上解压elasticsearch，并更改属主，组：

3. 修改192.168.30.121配置文件：

   #cat>elasticsearch/config/elasticsearch.yml<<EOF
   cluster.name: my-es
   node.name: node-1
   path.data: /usr/local/elk/elasticsearch/data
   path.logs: /usr/local/elk/elasticsearch/logs
   bootstrap.memory_lock: false
   network.host: 192.168.30.121
   http.port: 9200
   discovery.zen.ping.unicast.hosts: ["192.168.30.121", "192.168.30.122","192.168.30.123"]
   discovery.zen.minimum_master_nodes: 2
   node.master: true
   node.data: true
   EOF

4. 修改192.168.30.122配置：

   #cat>elasticsearch/config/elasticsearch.yml<<EOF
   cluster.name: my-es
   node.name: node-2
   path.data: /usr/local/elk/elasticsearch/data
   path.logs: /usr/local/elk/elasticsearch/logs
   bootstrap.memory_lock: false
   network.host: 192.168.30.122
   http.port: 9200
   discovery.zen.ping.unicast.hosts: ["192.168.30.121", "192.168.30.122","192.168.30.123"]
   discovery.zen.minimum_master_nodes: 2
   node.master: true
   node.data: true
   EOF
   

5. 修改192.168.30.123配置：

   #cat>elasticsearch/config/elasticsearch.yml<<EOF
   cluster.name: my-es
   node.name: node-3
   path.data: /usr/local/elk/elasticsearch/data
   path.logs: /usr/local/elk/elasticsearch/logs
   bootstrap.memory_lock: false
   network.host: 192.168.30.123
   http.port: 9200
   discovery.zen.ping.unicast.hosts: ["192.168.30.121", "192.168.30.122","192.168.30.123"]
   discovery.zen.minimum_master_nodes: 2
   node.master: true
   node.data: true
   EOF

   启动：

   cd /usr/local/elk/elasticsearch/logs && nohup sudo -u elk  /usr/local/elk/elasticsearch/bin/elasticsearch &

   检查：

6. 安装head：

   检查依赖包：

   安装:

   #git clone https://github.com/mobz/elasticsearch-head.git
   cd elasticsearch-head/
   npm config set registry https://registry.npm.taobao.org 
   npm install   #安装较慢，失败可多次执行
   
   
   修改vim Gruntfile.js
                   connect: {
                           server: {
                                   options: {
                                           hostname: "192.168.30.121",
                                           port: 9100,
                                           base: '.',
                                           keepalive: true
                                   }
                           }
                   }
   
           });

7. 修改app.js：

   [root@k8s-etcd1elasticsearch-head]# vim _site/app.js

   this.base_uri =this.config.base_uri || this.prefs.get("app-base_uri") ||"http://192.168.30.121:9200";

8. 在所有elasticsearch的配置文件追添以下两行，然后重启elasticsearch：

   http.cors.enabled: true
   http.cors.allow-origin: "*"

9. 启动head：

   [root@k8s-etcd1 elk]# cdelasticsearch-head/ && nohup grunt server -d &

10. 检测：