yum 安装elasticsearch

1. 

安装jdk8以上版本

yum install java -y
java -version 查看java版本

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官网 https://www.elastic.co/guide/en/elasticsearch/reference/7.3/rpm.html#rpm-running-init

2.

　　 1.下载并安装GPG key

　　

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



2.添加yum仓库
　　vim /etc/yum.repos.d/elasticsearch.repo
　　加入下面的代码
　　从官网复制的
　　

[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

　　3.安装elasticsearch

　　

yum install elasticsearch

4.配置elasticsearch
参考 http://www.360doc.com/content/19/0110/15/51464875_807934554.shtml
　　https://www.cnblogs.com/miao-zp/p/6003160.html

配置外网访问,端口
vim /etc/elasticsearch/elasticsearch.yml

 

5    启动

systemctl start elasticsearch

测试

curl -X GET localhost:9200

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如果内存不足  ,小于  1g
https://blog.csdn.net/qq_36663951/article/details/80693892

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如果 

[1] bootstrap checks failed

[1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured

https://www.jianshu.com/p/169acce2ce25

这时候继续编辑elasticsearch.yml文件，将 #cluster.initial_master_nodes: ["node-1", "node-2"] 修改为 cluster.initial_master_nodes: ["node-1"]，记得保存。