elasticsearch集群部署以及head插件安装

环境准备

elasticsearch是Java程序写的因此必须装jdk，否则使用不了。

[root@openstack ~]# java -version
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-b12)
OpenJDK 64-Bit Server VM (build 25.131-b12, mixed mode)

IP地址	主机名	系统	软件版本
192.168.209.6	CFCA	rhel7.4	elasticsearch-6.0.0/elasticsearch-head
192.168.209.7	openstack	rhel7.4	elasticsearch-6.0.0/elasticsearch-head

[root@openstack ~]# cd /usr/local/
[root@openstack local]# tar zxvf elasticsearch-6.0.0.tar.gz
[root@openstack local]# cd elasticsearch-6.0.0/
[root@openstack elasticsearch-6.0.0]# ll
总用量 224
drwxr-xr-x.  2 elasticsearch elasticsearch   4096 4月   1 21:56 bin               #脚本
drwxr-xr-x.  2 elasticsearch elasticsearch     75 4月   2 13:48 config             #配置文件
drwxr-xr-x.  2 elasticsearch elasticsearch   4096 11月 11 2017 lib
-rw-r--r--.  1 elasticsearch elasticsearch  11358 11月 11 2017 LICENSE.txt
drwxr-xr-x. 14 elasticsearch elasticsearch    251 11月 11 2017 modules
-rw-r--r--.  1 elasticsearch elasticsearch 193097 11月 11 2017 NOTICE.txt
drwxr-xr-x.  2 elasticsearch elasticsearch      6 11月 11 2017 plugins
-rw-r--r--.  1 elasticsearch elasticsearch   9326 11月 11 2017 README.textile

[root@openstack elasticsearch-6.0.0]# cd config/
[root@openstack config]# grep '^[a-z]' elasticsearch.yml    修改后的配置文件
cluster.name: my-application        集群名称
node.name: node-1                      节点名称
path.data: /elk/data                      数据存放路径
path.logs: /elk/logs                      日志路径
bootstrap.memory_lock: true        内存锁定
network.host: 0.0.0.0                  
http.port: 9200
discovery.zen.ping.unicast.hosts: ["192.168.209.6", "192.168.209.7"]       若是单节点的话此项配置注释掉
[root@openstack ~]# mkdir -p /elk/data/ /elk/logs/
[root@openstack ~]# useradd elasticsearch
[root@openstack ~]# chown -R elasticsearch:elasticsearch /elk/
[root@openstack ~]# chown -R elasticsearch:elasticsearch /usr/local/elasticsearch-6.0.0
[root@openstack ~]# su - elasticsearch
[elasticsearch@openstack ~]$ cd /usr/local/elasticsearch-6.0.0/
[elasticsearch@openstack bin]$ ./elasticsearch -d           后台启动，此时启动不了，需要修改一下配置

[root@openstack ~]# vim /etc/security/limits.conf    重启参数才能生效

*        hard    nofile           65536
*        soft    nofile           65536
*        soft    memlock          unlimited
*        hard    memlock          unlimited

[root@openstack ~]# vim /etc/sysctl.conf
vm.max_map_count=262144
[root@openstack ~]# sysctl -p    参数生效

切换用户之后重新启动，查看进程和监听端口
[root@openstack ~]# ps -ef|grep java                               查看进程
elastic+   6750      1  1 12:29 pts/2    00:02:30 /bin/java -Xms1g -Xmx1g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+AlwaysPreTouch -server -Xss1m -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djna.nosys=true -XX:-OmitStackTraceInFastThrow -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -XX:+HeapDumpOnOutOfMemoryError -Des.path.home=/usr/local/elasticsearch-6.0.0 -Des.path.conf=/usr/local/elasticsearch-6.0.0/config -cp /usr/local/elasticsearch-6.0.0/lib/* org.elasticsearch.bootstrap.Elasticsearch -d

[root@openstack ~]# netstat -tlunp|grep java                   查看端口
tcp6       0      0 :::9200                 :::*                    LISTEN      6750/java           
tcp6       0      0 :::9300                 :::*                    LISTEN      6750/java

[root@openstack ~]# curl 192.168.209.7:9200       查看信息
{
  "name" : "node-1",
  "cluster_name" : "my-application",
  "cluster_uuid" : "Z3TOUu0jTUiCSHsuFJsv_g",
  "version" : {
    "number" : "6.0.0",
    "build_hash" : "8f0685b",
    "build_date" : "2017-11-10T18:41:22.859Z",
    "build_snapshot" : false,
    "lucene_version" : "7.0.1",
    "minimum_wire_compatibility_version" : "5.6.0",
    "minimum_index_compatibility_version" : "5.0.0"
  },
  "tagline" : "You Know, for Search"
}
另外一台机器也一样的配置，只是节点的名称的不一样。

安装head插件：

GitHub地址：https://github.com/mobz/elasticsearch-head

[root@openstack ~]# cd /usr/local/src/

[root@openstack src]# git clone git://github.com/mobz/elasticsearch-head.git

[root@openstack src]# ll

总用量 4

drwxr-xr-x. 7 root root 4096 4月   1 22:58 elasticsearch-head

[root@openstack src]# cd elasticsearch-head/

[root@openstack elasticsearch-head]# yum -y install npm

[root@openstack elasticsearch-head]# npm install grunt -save

[root@openstack elasticsearch-head]# ll -d node_modules/grunt   #必须确认生成该文件

drwxr-xr-x. 5 root root 117 4月   1 23:28 node_modules/grunt

[root@openstack elasticsearch-head]# npm install              #执行安装

[root@openstack elasticsearch-head]# npm run start &           #后台启动

[root@openstack src]# vim /usr/local/elasticsearch-6.0.0/config/elasticsearch.yml   修改如下elasticsearch配置文件，并且重启该服务

http.cors.enabled: true
http.cors.allow-origin: "*"
查看一下进程和端口：

[root@openstack src]# netstat -tlunp|grep grunt
tcp        0      0 0.0.0.0:9100            0.0.0.0:*               LISTEN      8911/grunt

[root@openstack src]# ps -ef|grep npm
root       8901   8749  0 15:42 pts/1    00:00:03 npm

可以在页面访问：

输入地址后就可以查看集群的信息了，带星号的是master

至此集群搭建完成，head插件也安装成功了。