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一、环境准备

1、准备一台系统为CentOS7的服务器

[root@localhost ~]# cat /etc/redhat-release 
CentOS Linux release 7.9.2009 (Core)

2、创建新用户，用于elasticsearch服务

# elastic不允许使用root账号启动服务
[root@localhost ~]# useradd elastic
[root@localhost ~]# passwd elastic 
Changing password for user elastic.
New password: 
BAD PASSWORD: The password is shorter than 8 characters
Retype new password: 
passwd: all authentication tokens updated successfully.

3、设置ulimit

[root@localhost ~]# vi /etc/security/limits.conf
# 在文本最后添加如下几行
## 可以打开的最大文件数（软限制）
elastic soft nofile 65536
## 可以打开的最大文件数（硬限制）
elastic hard nofile 65536
## 可以创建的最大进程数（软限制）
elastic soft nproc 65535
## 可以创建的最大进程数（硬限制）
elastic hard nproc 65535[root@localhost ~]# vi /etc/sysctl.conf
# 在文本最后添加下面行
## 设置单个进程可以拥有的最大内存映射区域数量
vm.max_map_count=262144# 重启服务器，使其生效

4、查看ulimit值是否生效

[root@localhost ~]# su - elastic 
[elastic@localhost ~]$ ulimit -S -n
65536
[elastic@localhost ~]$ ulimit -H -n
65536
[elastic@localhost ~]$ cat /proc/sys/vm/max_map_count 
262144

二、安装elastic search

1、下载安装包

[root@localhost ~]# wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-8.13.4-linux-x86_64.tar.gz

2、解压缩

# 解压缩
[root@localhost ~]# tar -zxvf elasticsearch-8.13.4-linux-x86_64.tar.gz
# 移动目录到/opt/下
[root@localhost ~]# mv elasticsearch-8.13.4 /opt/es/

3、设置目录权限

[root@localhost ~]# cd /opt
[root@localhost opt]# chown -R elastic: es

4、修改配置文件

[root@localhost es]# vi /opt/es/config/elasticsearch.yml
# 修改如下内容
## elastic节点名字
node.name: node-1
## 数据存放目录
path.data: /opt/es/data
## 日志存放目录
path.logs: /opt/es/logs
## 对所有IP开放，可以跟据需求修改
network.host: 0.0.0.0

5、设置启动脚本

vi /etc/systemd/system/elasticsearch.service[Unit]
Description=ElasticSearch
After=network.target[Service]
Type=simple
User=elastic
Group=elastic
ExecStart=/opt/es/bin/elasticsearch -d -p /opt/es/elasticsearch.pid
ExecStop=/opt/es/bin/elasticsearch-sysctl stop
PIDFile=/opt/es/elasticsearch.pid
# 修改线程数限制
LimitNPROC=65535
# 修改文件描述符限制
LimitNOFILE=65535[Install]
WantedBy=multi-user.target

6、启动服务

# 重新加载服务
[root@localhost es]# systemctl daemon-reload 
# 启动服务
[root@localhost es]# systemctl start elasticsearch.service
# 设置开机自启动
[root@localhost es]# systemctl enable elasticsearch.service

7、查看服务是否启动成功

# 查看9200，9300端口是否启动
[root@localhost es]# netstat -ntpl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name           
tcp6       0      0 :::9200                 :::*                    LISTEN      1605/java           
tcp6       0      0 :::9300                 :::*                    LISTEN      1605/java 

8、设置密码

[root@localhost es]# /opt/es/bin/elasticsearch-setup-passwords interactive
******************************************************************************
Note: The 'elasticsearch-setup-passwords' tool has been deprecated. This       command will be removed in a future release.
******************************************************************************Initiating the setup of passwords for reserved users elastic,apm_system,kibana,kibana_system,logstash_system,beats_system,remote_monitoring_user.
You will be prompted to enter passwords as the process progresses.
Please confirm that you would like to continue [y/N]yEnter password for [elastic]: 
Reenter password for [elastic]: 
Enter password for [apm_system]: 
Reenter password for [apm_system]: 
Enter password for [kibana_system]: 
Reenter password for [kibana_system]: 
Enter password for [logstash_system]: 
Reenter password for [logstash_system]: 
Enter password for [beats_system]: 
Reenter password for [beats_system]: 
Enter password for [remote_monitoring_user]: 
Reenter password for [remote_monitoring_user]: 
Changed password for user [apm_system]
Changed password for user [kibana_system]
Changed password for user [kibana]
Changed password for user [logstash_system]
Changed password for user [beats_system]
Changed password for user [remote_monitoring_user]
Changed password for user [elastic]

9、修改密码

如果忘记密码，可以通过以下方式修改密码

[root@localhost es]# elasticsearch-reset-password -u elastic -i

三、测试

1、浏览器访问测试

浏览器中输入URL：https://IP:9200

输入账号密码