新版已经支持免java方式安装, 参考文档 传送门

依赖安装：java

Elasticsearch基于java开发，先要安装java环境，推荐yum命令安装

1. 查看java可下载列表（官网推荐使用jdk 1.8.0安装）

   yum -y list java*

Elasticsearch requires at least Java 8. Specifically as of this writing, it is recommended that you use the Oracle JDK version 1.8.0_131

2. 我们安装-devel版本，时间不同，版本号有区别

   yum install -y java-1.8.0-openjdk-devel.x86_64

3. 输入java -version查看是否安装成功

4. 默认安装在/usr/lib/jvm目录，通过echo $JAVA_HOME可以查看

5. 将java添加到环境变量vi /etc/profile，在尾部添加如下配置：

   export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.181-3.b13.el6_10.x86_64 export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$PATH:$JAVA_HOME/bin

6. 按Esc按键，然后输入:wq命令保存文件，输入以下命令使配置生效

   source /etc/profile

安装Elasticsearch

7. 下载Elasticsearch的rpm安装包（一包解万坑），可以在https://www.elastic.co/cn/downloads/elasticsearch 查看，下载最新的rmp包

   wget -c https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.2.0-x86_64.rpm

8. 执行安装

   rpm -ivh elasticsearch-7.2.0-x86_64.rpm

9. 运行，这里不需要切换用户运行，因为elasticsearch的服务命令会完成这一切

   sudo systemctl daemon-reload sudo systemctl start elasticsearch.service

10. 查看是否成功

curl -XGET 'http://localhost:9200/'


{
  "name" : "localhost.localdomain",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "izX7KuQATc2ghCjDbEYwYg",
  "version" : {
    "number" : "7.2.0",
    "build_flavor" : "default",
    "build_type" : "rpm",
    "build_hash" : "508c38a",
    "build_date" : "2019-06-20T15:54:18.811730Z",
    "build_snapshot" : false,
    "lucene_version" : "8.0.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

11. 设置开机启动

sudo systemctl daemon-reload
sudo systemctl enable elasticsearch.service

12. 停止开机启动

sudo systemctl disable elasticsearch.service