Centos安装elasticsearch

1：下载ES

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.9.2-linux-x86_64.tar.gz

2：解压

tar -zxvf elasticsearch-7.9.2-linux-x86_64.tar.gz

3：修改配置文件

取消掉注释node.name

cluster.name: "docker-cluster"
network.host: 0.0.0.0
http.cors.enabled: true
http.cors.allow-origin: "*"
discovery.seed_hosts: ["127.0.0.1"]
cluster.initial_master_nodes: ["node-1"]

4：添加子用户并设置密码

useradd es7.9
passwd es7.9 
输入密码

5：目录授权子用户

chown -R es7.9:es7.9 elasticsearch-7.9.2

6：切换子用户

su es7.9

7：启动

nohup ./elasticsearch &

8：如果报错

用root用户执行
/etc/sysctl.conf  该配置文件增加vm.max_map_count=262144
/sbin/sysctl -p
或
vim /etc/security/limits.conf
*          soft    nproc     65535
*          hard    nproc     65535
*          soft    nofile     65535
*          hard    nofile     65535

或
vim /etc/security/limits.d/20-nproc.conf
*          soft    nproc     65535
*          hard    nproc     65535
*          soft    nofile     65535
*          hard    nofile     65535