创建repo

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

[elasticsearch]
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=0
autorefresh=1
type=rpm-md

刷新

yum clean all
yum makecache

常用命令

systemctl start elasticsearch //启动
systemctl status elasticsearch //查询状态
systemctl enable elasticsearch.service //开机自启
systemctl stop elasticsearch //停止

检查是否运行起来:

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启动报错:

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

解决办法:

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以下有些常见问题:

max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
// 修改下面的文件 里面是一些内核参数
vi /etc/sysctl.conf
//添加以下配置
vm.max_map_count=655360
添加完后保存，然后执行
sysctl -p
//-p 从指定的文件加载系统参数，如不指定即从/etc/sysctl.conf中加载

解决 max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536]
原因：最大文件打开数量太小，出现此错误，切换到root用户下，修改limits.conf
// 编辑此文件
vim etc/security/limits.conf
在文件后加上

• soft nofile 65536
• hard nofile 65536

SpringBoot 集成es时注意版本:

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<meta charset="utf-8">

注意SpringBoot要和Elasticsearch版本对应不然：
[NoNodeAvailableException[None of the configured nodes are available]
当然也有可能是

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名称没对应上!

关注公众号回复“书籍”就可以看大佬看得同款书籍了:

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