centos7.6 yum安装 elasticsearch

1、首先es依赖Java，所以必须保证Java环境已安装好

2、导入公共签名密钥
    

rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch 

3、添加yum源
      

vim /etc/yum.repos.d/elasticsearch.repo

[elasticsearch-7.x]
name=Elasticsearch repository for 7.x packages
baseurl=https://artifacts.elastic.co/packages/7.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-md

  4、更新yum缓存
   

 yum makecache

  5、安装es
      

yum install -y elasticsearch

  6、按照提示启动es
  

 sudo systemctl daemon-reload
 sudo systemctl enable elasticsearch.service
 sudo systemctl start elasticsearch.service

  7、如果安装没问题，启动失败了，可以查看日志 /var/log/elasticsearch/elasticsearch.log  (一般都是内存不足引起的࿰