查看“Elasticsearch集群配置”的源代码

=== 机器环境 === 
 主机IP	组件
 192.168.1.3	 node1
 192.168.1.4	 node2
 192.168.1.5	 node3

=== 安装配置 ===

 
==== 配置yum源 ====
 cat > /etc/yum.repos.d/elk.repo << EOF
 [elasticsearch-6.x]
 name=Elasticsearch repository for 6.x packages
 baseurl=https://artifacts.elastic.co/packages/6.x/yum
 gpgcheck=1
 gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
 enabled=1
 autorefresh=1
 type=rpm-md
 EOF
 rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
==== 安装elasticsearch ====
在四台主机安装elasticsearch。

 yum -y install elasticsearch
接下来进行配置：

==== node1配置 ====
 mkdir -pv /es/{logs,data"
 chown -R elasticsearch,elasticsearch /es
 egrep -v "^#|^$" /etc/elasticsearch/elasticsearch.yml
 cluster.name: elk
 node.name: elk-node1
 path.data: /es/data/
 path.logs: /es/logs/
 network.host: 0.0.0.0
 http.port: 9200
 discovery.zen.ping.unicast.hosts: ["192.168.1.3:9300","192.168.1.4:9300","192.168.1.5:9300","192.168.1.6:9300"]
 discovery.zen.minimum_master_nodes: 2
 xpack.security.enabled: false
说明：

 cluster.name：自定义集群名称
 node.name：自定义节点名，不同主机名称不能一致。
 path.data：data存储路径，这里更改成自定义以应对日志的big。
 path.logs：log存储路径，是为es自己的日志。
 network.host：es监听地址，采用"0.0.0.0"，表示允许所有设备访问。
 http.port：es监听端口，可不取消注释，默认即此端口。
 discovery.zen.ping.unicast.hosts：集群节点发现列表
 discovery.zen.minimum_master_nodes：定义可成为master的节点数量。为避免脑裂的情况，建议设置成2。参考
 xpack.security.enabled：添加这条，这条是配置kibana的安全机制，暂时关闭。
==== 分发其他三台配置 ====

接着将配置分发给其他几台主机。

 scp /etc/elasticsearch/elasticsearch.yml 192.168.1.4:/etc/elasticsearch/elasticsearch.yml
 scp /etc/elasticsearch/elasticsearch.yml 192.168.1.5:/etc/elasticsearch/elasticsearch.yml
 scp /etc/elasticsearch/elasticsearch.yml 192.168.1.6:/etc/elasticsearch/elasticsearch.yml
然后更改对应三台的配置，只需更改node-name即可。


==== 启动es服务 ====

 systemctl daemon-reload
 systemctl enable elasticsearch.service
 systemctl start elasticsearch.service
 systemctl status elasticsearch.service
==== 查看集群信息 ====
查看es是否正常启动
 curl -X GET "127.0.0.1:9200/"
 curl -XGET 'http://127.0.0.1:9200/_cluster/health?pretty'

查看集群状态
 curl -XGET 'http://127.0.0.1:9200/_cat/nodes'
 url -XGET 'http://127.0.0.1:9200/_cat/nodes?v'
 url -XGET 'http://127.0.0.1:9200/_cluster/state/nodes?pretty'

查询master
 curl -XGET 'http://127.0.0.1:9200/_cluster/state/master_node?pretty'
 curl -XGET 'http://127.0.0.1:9200/_cat/master?v'

查询集群健康状态
 curl -XGET 'http://127.0.0.1:9200/_cat/health?v'