### --- hadoop01~03修改系统配置：修改/etc/sysctl.conf~~~     # 修改/etc/sysctl.conf
[root@hadoop01 ~]# vim /etc/sysctl.conf
~~~在文件末尾添加如下参数
vm.max_map_count=655360

~~~     # 执行sysctl -p 让其生效[root@hadoop01 ~]# sysctl -p

### --- 修改/etc/security/limits.conf~~~     # 修改linux系统对文件描述符的限制级别
[root@hadoop01 ~]# vim /etc/security/limits.conf
~~~     # 在文件末尾添加如下参数
* soft nofile 65536
* hard nofile 65536
* soft nproc 4096
* hard nproc 4096

### --- 准备工作：创建es用户~~~     # hadoop01~03创建es用户(必须)，因为es不能用root用户启动
[root@hadoop01 ~]# useradd es
[root@hadoop01 ~]# passwd es
New password:123456

~~~     # hadoop01~03使用root用户执行visudo然后为es用户添加权限[root@hadoop01 ~]# vim /etc/sudoers
~~~     # 第101行添加如下内容
es ALL=(ALL) ALL

### --- 使用root用户创建工作目录~~~     # hadoop01~03创建es环境目录
[root@hadoop01 ~]# mkdir -p /opt/yanqi/servers/es
[root@hadoop01 ~]# mkdir -p /opt/yanqi/servers/es/data/es
[root@hadoop01 ~]# mkdir -p /opt/yanqi/servers/es/logs/es
[root@hadoop01 ~]# chown -R es /opt/yanqi/servers/es
[root@hadoop01 ~]# chown -R es /opt/yanqi/servers/es/data/es
[root@hadoop01 ~]# chown -R es /opt/yanqi/servers/es/logs/es

### --- 分布式安装部署：# 使用es用户连接服务器~~~     # hadoop01解压版本包
[es@hadoop01 software]$ tar -zxvf elasticsearch-7.3.0-linux-x86_64.tar.gz -C ../servers/es/
~~~     # 修改版本包名称
[es@hadoop01 ~]$ mv /opt/yanqi/servers/es/elasticsearch-7.3.0/ /opt/yanqi/servers/es/elasticsearch

### --- 修改配置文件：elasticsearch.yml配置文件说明：~~~     # hadoop01下修改es配置文件参数：
[es@hadoop01 ~]$ vim /opt/yanqi/servers/es/elasticsearch/config/elasticsearch.yml~~~    第17行：集群名字
cluster.name: myes~~~    第23行：集群中当前的节点
node.name: hadoop01~~~    第33行：数据目录
path.data: /opt/yanqi/servers/es/data/es~~~    第37行：日志目录
path.logs: /opt/yanqi/servers/es/logs/es~~~    第55/59行：当前主机的ip地址：ECS使用内网地址
network.host: hadoop01
http.port: 9200~~~    第72行：初始化一个新的集群时需要此配置来选举master：ECS使用内网地址
cluster.initial_master_nodes: ["hadoop01","hadoop02","hadoop03"]~~~    第68行：写入候选主节点的设备地址
discovery.seed_hosts: ["hadoop01","hadoop02","hadoop03"]~~~    第89/90行：行尾添加： 跨域，适用于所有域名
http.cors.enabled: true
http.cors.allow-origin: "*"

### --- 安装包分发到其他两台机器上~~~     # hadoop01节点发送es版本包到其它主机
[es@hadoop01 ~]$ cd /opt/yanqi/servers/es/
[es@hadoop01 es]$ scp -r elasticsearch/ hadoop02:$PWD
[es@hadoop01 es]$ scp -r elasticsearch/ hadoop03:$PWD

### --- hadoop02主机修改elasticsearch.yaml~~~     # hadoop02主机修改elasticsearch.yaml配置文件
[es@hadoop02 ~]$ vim /opt/yanqi/servers/es/elasticsearch/config/elasticsearch.yml~~~    第17行：集群名字
cluster.name: myes~~~    第23行：集群中当前的节点
node.name: hadoop02~~~    第33行：数据目录
path.data: /opt/yanqi/servers/es/data/es~~~    第37行：日志目录
path.logs: /opt/yanqi/servers/es/logs/es~~~    第55/59行：当前主机的ip地址
network.host: hadoop02
http.port: 9200~~~    第72行：初始化一个新的集群时需要此配置来选举master
cluster.initial_master_nodes: ["hadoop01","hadoop02","hadoop03"]~~~    第68行：写入候选主节点的设备地址
discovery.seed_hosts: ["hadoop01","hadoop02","hadoop03"]~~~    第89/90行：行尾添加： 跨域，适用于所有域名
http.cors.enabled: true
http.cors.allow-origin: "*"

### --- hadoop03主机修改elasticsearch.yaml~~~     # hadoop03主机修改elasticsearch.yaml配置文件
[es@hadoop03 ~]$ vim /opt/yanqi/servers/es/elasticsearch/config/elasticsearch.yml~~~    第17行：集群名字17 cluster.name: myes~~~    第23行：集群中当前的节点23 node.name: hadoop03~~~    第33行：数据目录33 path.data: /opt/yanqi/servers/es/data/es~~~    第37行：日志目录37 path.logs: /opt/yanqi/servers/es/logs/es~~~    第55/59行：当前主机的ip地址55 network.host: hadoop0359 http.port: 9200~~~    第72行：初始化一个新的集群时需要此配置来选举master72 cluster.initial_master_nodes: ["hadoop01","hadoop02","hadoop03"]~~~    第68行：写入候选主节点的设备地址68 discovery.seed_hosts: ["hadoop01","hadoop02","hadoop03"]~~~    第89/90行：行尾添加： 跨域，适用于所有域名89 http.cors.enabled: true90 http.cors.allow-origin: "*"

### --- hadoop01~03修改jvm内存大小[es@hadoop01 ~]$ vim /opt/yanqi/servers/es/elasticsearch/config/jvm.options~~~    第22~23行：修改内存
-Xms2g
-Xmx2g

### --- 启动es服务~~~     # hadoop01~03：后台启动es服务，要发现错误的话，去/opt/yanqi/servers/logs/es目录下查看。
[es@hadoop01 ~]$ nohup /opt/yanqi/servers/es/elasticsearch/bin/elasticsearch >/dev/null 2>&1 &
~~~     # 查看es服务进程
[es@hadoop01 ~]$ jps
1500 Elasticsearch[es@hadoop01 ~]$ ps -ef | grep 1500
es        1500  1279  8 14:49 pts/1    00:00:37 /opt/yanqi/servers/jdk1.8.0_231/bin/java -Xms512m -Xmx512m -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.ttl=10 -XX:+AlwaysPreTouch -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 -Djava.io.tmpdir=/tmp/elasticsearch-7630453916949373570 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=data -XX:ErrorFile=logs/hs_err_pid%p.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintTenuringDistribution -XX:+PrintGCApplicationStoppedTime -Xloggc:logs/gc.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=32 -XX:GCLogFileSize=64m -Dio.netty.allocator.type=unpooled -XX:MaxDirectMemorySize=268435456 -Des.path.home=/opt/yanqi/servers/es/elasticsearch -Des.path.conf=/opt/yanqi/servers/es/elasticsearch/config -Des.distribution.flavor=default -Des.distribution.type=tar -Des.bundled_jdk=true -cp /opt/yanqi/servers/es/elasticsearch/lib/* org.elasticsearch.bootstrap.Elasticsearch
es        1570  1500  0 14:49 pts/1    00:00:00 /opt/yanqi/servers/es/elasticsearch/modules/x-pack-ml/platform/linux-x86_64/bin/controller

### --- 访问es服务~~~     # http://hadoop01:9200/?pretty  ；pretty：格式化的，漂亮的。
~~~     # UI.输出参数
{"name" : "hadoop01","cluster_name" : "myes","cluster_uuid" : "dkCOn-auSUCJH42iBUSO1w","version" : {"number" : "7.3.0","build_flavor" : "default","build_type" : "tar","build_hash" : "de777fa","build_date" : "2019-07-24T18:30:11.767338Z","build_snapshot" : false,"lucene_version" : "8.1.0","minimum_wire_compatibility_version" : "6.8.0","minimum_index_compatibility_version" : "6.0.0-beta1"},"tagline" : "You Know, for Search"
}

~~~     # http://hadoop02:9200/?pretty  ；pretty：格式化的，漂亮的。
~~~     # UI.输出参数{"name" : "hadoop02","cluster_name" : "myes","cluster_uuid" : "dkCOn-auSUCJH42iBUSO1w","version" : {"number" : "7.3.0","build_flavor" : "default","build_type" : "tar","build_hash" : "de777fa","build_date" : "2019-07-24T18:30:11.767338Z","build_snapshot" : false,"lucene_version" : "8.1.0","minimum_wire_compatibility_version" : "6.8.0","minimum_index_compatibility_version" : "6.0.0-beta1"},"tagline" : "You Know, for Search"
}

~~~     # http://hadoop03:9200/?pretty  ；pretty：格式化的，漂亮的。
~~~     # UI.输出参数{"name" : "hadoop03","cluster_name" : "myes","cluster_uuid" : "dkCOn-auSUCJH42iBUSO1w","version" : {"number" : "7.3.0","build_flavor" : "default","build_type" : "tar","build_hash" : "de777fa","build_date" : "2019-07-24T18:30:11.767338Z","build_snapshot" : false,"lucene_version" : "8.1.0","minimum_wire_compatibility_version" : "6.8.0","minimum_index_compatibility_version" : "6.0.0-beta1"},"tagline" : "You Know, for Search"
}