1.安装jre
Elasticsearch（下文用ES简称代替） 的安装搭建环境要求JAVA环境，需要jre1.8以上，所以先从JAVA官网下载jre的rpm包
http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html
下载rpm包后，上传到服务器的 /opt 目录下
服务器上切换到opt 目录下，使用rpm命令安装jre（安装的时候自己补全对应的rpm包的名字），安装完成后使用 命令 java -version 验证java的安装正确性
[root@elk2 ~]# cd /opt
[root@elk2 opt]# rpm -ivh jre-8u161-linux-x64.rpm
Preparing... ########################################### [100%]
1:jre1.8 ########################################### [100%]
Unpacking JAR files...
plugin.jar...
javaws.jar...
deploy.jar...
rt.jar...
jsse.jar...
charsets.jar...
localedata.jar...
[root@elk2 opt]# java -version
java version "1.8.0_161"
Java(TM) SE Runtime Environment (build 1.8.0_161-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)2.安装ES（官网有多种方法，随意选择）
打开ES官网https://www.elastic.co/guide/en/elasticsearch/reference/current/install-elasticsearch.html
根据官网的教程下载es的tar包，
下载es的tar包
[root@elk2 opt]# wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.2.tar.gz解压
[root@elk2 opt]#tar -xzf elasticsearch-6.2.2.tar.gz解压成功后获得ES6.2.2文件夹
[root@elk2 opt]# ll
总用量 90232
drwxr-xr-x. 8 root root 4096 2月 17 03:03 elasticsearch-6.2.2
-rw-r--r--. 1 root root 29049540 2月 28 11:30 elasticsearch-6.2.2.tar.gz
-rw-r--r--. 1 root root 63333908 2月 28 11:30 jre-8u161-linux-x64.rpm
3.创建ES用户
默认ES 6.X 是不允许root用户运行的，否则ES运行的时候会报错，所以我们需要创建新的用户
[root@elk2 opt]# groupadd es
[root@elk2 opt]# useradd es -g es
[root@elk2 opt]# passwd es
更改用户 es 的密码 。
新的 密码：
重新输入新的 密码：
passwd： 所有的身份验证令牌已经成功更新。4.修改ES目录权限
修改ES的根目录的权限
[root@elk2 opt]# chown -R es:es elasticsearch-6.2.2切换当前用户为es ， 进入es的目录， 使用命令
./bin/elasticsearch 就可以将ES 运行起来了
[root@elk2 opt]# su es
[es@elk2 opt]$ cd elasticsearch-6.2.2
[es@elk2 elasticsearch-6.2.2]$ ./bin/elasticsearch正常的启动信息如下：
可以看到默认9200 9300 端口打开
[2018-02-28T11:56:02,537][INFO ][o.e.n.Node ] [rAnzmAZ] starting ...
[2018-02-28T11:56:02,717][INFO ][o.e.t.TransportService ] [rAnzmAZ] publish_address {127.0.0.1:9300}, bound_addresses {[::1]:9300}, {127.0.0.1:9300}
[2018-02-28T11:56:02,736][WARN ][o.e.b.BootstrapChecks ] [rAnzmAZ] max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2018-02-28T11:56:02,737][WARN ][o.e.b.BootstrapChecks ] [rAnzmAZ] max number of threads [1024] for user [es] is too low, increase to at least [4096]
[2018-02-28T11:56:02,737][WARN ][o.e.b.BootstrapChecks ] [rAnzmAZ] max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2018-02-28T11:56:02,737][WARN ][o.e.b.BootstrapChecks ] [rAnzmAZ] system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
[2018-02-28T11:56:05,848][INFO ][o.e.c.s.MasterService ] [rAnzmAZ] zen-disco-elected-as-master ([0] nodes joined), reason: new_master {rAnzmAZ}{rAnzmAZLR2CCkXXZY1oxAA}{qLtHLrJXRuWme98YA2DxgQ}{127.0.0.1}{127.0.0.1:9300}
[2018-02-28T11:56:05,854][INFO ][o.e.c.s.ClusterApplierService] [rAnzmAZ] new_master {rAnzmAZ}{rAnzmAZLR2CCkXXZY1oxAA}{qLtHLrJXRuWme98YA2DxgQ}{127.0.0.1}{127.0.0.1:9300}, reason: apply cluster state (from master [master {rAnzmAZ}{rAnzmAZLR2CCkXXZY1oxAA}{qLtHLrJXRuWme98YA2DxgQ}{127.0.0.1}{127.0.0.1:9300} committed version [1] source [zen-disco-elected-as-master ([0] nodes joined)]])
[2018-02-28T11:56:05,906][INFO ][o.e.h.n.Netty4HttpServerTransport] [rAnzmAZ] publish_address {127.0.0.1:9200}, bound_addresses {[::1]:9200}, {127.0.0.1:9200}
[2018-02-28T11:56:05,906][INFO ][o.e.n.Node ] [rAnzmAZ] started
[2018-02-28T11:56:05,935][INFO ][o.e.g.GatewayService ] [rAnzmAZ] recovered [0] indices into cluster_state可以验证一下服务是否正常
[root@elk2 ~]# curl -i "http://localhost:9200"
HTTP/1.1 200 OK
content-type: application/json; charset=UTF-8
content-length: 436
{
"name" : "linux-2",
"cluster_name" : "li-application",
"cluster_uuid" : "LeGL4ApCTDS-Nj76INkZAg",
"version" : {
"number" : "6.2.2",
"build_hash" : "10b1edd",
"build_date" : "2018-02-16T19:01:30.685723Z",
"build_snapshot" : false,
"lucene_version" : "7.2.1",
"minimum_wire_compatibility_version" : "5.6.0",
"minimum_index_compatibility_version" : "5.0.0"
},
"tagline" : "You Know, for Search"
}ps 。后台运行ES，可以加入-p 命令 让es在后台运行， -p 参数 记录进程ID为一个文件
$ ./bin/elasticsearch -p /tmp/elasticsearch-pid -d
$ cat /tmp/elasticsearch-pid && echo
15516
$ kill -SIGTERM 155165.配置ElasticSearch，让ElasticSearch支持外网访问，加入集群等
修改配置文件elasticsearch.yml
[es@elk2 elasticsearch-6.2.2]$ vim config/elasticsearch.yml去掉以下注释，修改以下配置（记得配置项名称冒号后面是有一个空格的，若没有空格会报错
cluster.name: li-application #集群名称，可以自行修改
node.name: linux-2 #节点名称，自行修改
network.host: 172.16.1.177 #主机地址，这里写本机IP
http.port: 9200 #端口修改后，再次启动ES后，会得到以下报错
[es@elk2 elasticsearch-6.2.2]$ ./bin/elasticsearch[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max number of threads [1024] for user [es] is too low, increase to at least [4096]
[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[4]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
根据网上的各位大佬的解决办法，逐一去解决，使用root身份，执行以下操作
解决问题【1】【2】
[root@elk2 ~]# vim /etc/security/limits.conf在文件未添加以下内容（开头es 为用户名）
es soft nofile 65536
es hard nofile 131072
es soft nproc 4096
es hard nproc 4096解决问题【3】
[root@elk2 ~]# sysctl -w vm.max_map_count=262144
[root@elk2 ~]# vim /etc/sysctl.conf #让配置永久生效在文末添加以下内容
vm.max_map_count=262144解决问题【4】
Centos6不支持SecComp，而ES6默认bootstrap.system_call_filter为true
[es@elk2 elasticsearch-6.2.2]$ vim config/elasticsearch.yml禁用：在elasticsearch.yml中配置bootstrap.system_call_filter为false，注意要在Memory下面:
取消bootstrap.memory_lock的注释，添加bootstrap.system_call_filter 配置
bootstrap.memory_lock: false
bootstrap.system_call_filter: false再次启动es，成功启动
[es@elk2 elasticsearch-6.2.2]$ ./bin/elasticsearch[2018-02-28T14:16:23,893][INFO ][o.e.t.TransportService ] [linux-2] publish_address {172.16.1.177:9300}, bound_addresses {172.16.1.177:9300}
[2018-02-28T14:16:23,914][INFO ][o.e.b.BootstrapChecks ] [linux-2] bound or publishing to a non-loopback address, enforcing bootstrap checks
[2018-02-28T14:16:27,017][INFO ][o.e.c.s.MasterService ] [linux-2] zen-disco-elected-as-master ([0] nodes joined), reason: new_master {linux-2}{rAnzmAZLR2CCkXXZY1oxAA}{Diisd8m8SiOgBGPC_ET_Fg}{172.16.1.177}{172.16.1.177:9300}
[2018-02-28T14:16:27,031][INFO ][o.e.c.s.ClusterApplierService] [linux-2] new_master {linux-2}{rAnzmAZLR2CCkXXZY1oxAA}{Diisd8m8SiOgBGPC_ET_Fg}{172.16.1.177}{172.16.1.177:9300}, reason: apply cluster state (from master [master {linux-2}{rAnzmAZLR2CCkXXZY1oxAA}{Diisd8m8SiOgBGPC_ET_Fg}{172.16.1.177}{172.16.1.177:9300} committed version [1] source [zen-disco-elected-as-master ([0] nodes joined)]])
[2018-02-28T14:16:27,117][INFO ][o.e.h.n.Netty4HttpServerTransport] [linux-2] publish_address {172.16.1.177:9200}, bound_addresses {172.16.1.177:9200}
[2018-02-28T14:16:27,117][INFO ][o.e.n.Node ] [linux-2] started
[2018-02-28T14:16:27,170][INFO ][o.e.g.GatewayService ] [linux-2] recovered [0] indices into cluster_state