• 安装JDK yum install -y java-1.8.0-openjdk
• 下载安装公钥 rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
• 配置yum源 vim /etc/yum.repos.d/elasticsearch.repo,s触发编辑，复制如下内容：

[elasticsearch-6.x]
name=Elasticsearch repository for 6.x packages
baseurl=https://artifacts.elastic.co/packages/6.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-md

按键ESC退出编辑，:wq保存退出。

• yum makecache更新缓存
• 执行下载安装yum install elasticsearch
• 设置支持公网访问，vim /etc/elasticsearch/elasticsearch.yml,设置network.host: 0.0.0.0.
• 启动服务

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