elasticsearch: 安装es8.14.2

一，什么是es?

Elasticsearch 是一款近实时的搜索引擎，底层是基于 Lucene 做搜索，再此基础上加入了分布式的特性，以便支持海量数据的存储和搜索

官网:

https://www.elastic.co/cn/

二，下载

1，进入下载页面

在下载页面下载

得到链接地址后可以从服务端直接下载:

[lhdop@blog es]$ wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-8.14.2-linux-x86_64.tar.gz

2，查询各es版本所支持的java版本

https://www.elastic.co/cn/support/matrix#matrix_jvm

如图:

三，安装

1,解压缩:

[lhdop@blog es]$ tar -zxvf elasticsearch-8.14.2-linux-x86_64.tar.gz

2,移动到指定目录:

[lhdop@blog es]$ mv elasticsearch-8.14.2 /usr/local/soft/elasticsearch

 

4,相关命令:

启动:

[lhdop@blog es]$ /usr/local/soft/elasticsearch/bin/elasticsearch -d 

停止:killes的进程id

[lhdop@blog es]$ kill -9 23934

五，报错

1，报错信息

[2024-07-10T12:10:18,927][ERROR][o.e.b.Elasticsearch      ] [iZ2zejc9t0hf6pnw6sewrxZ] 
fatal exception while booting Elasticsearchjava.lang.RuntimeException: 
can not run elasticsearch as root

解决:

不要用root账户运行es,换一个普通账户启动

2，报错信息

[lhdop@iZ2zejc9t0hf6pnw6sewrxZ conf]$ /usr/local/soft/elasticsearch-8.14.2/bin/elasticsearch -d
warning: ignoring JAVA_HOME=/usr/local/soft/jdk-17.0.11; using bundled JDK
/usr/local/soft/elasticsearch-8.14.2/bin/elasticsearch-cli: line 14: 
/usr/local/soft/elasticsearch-8.14.2/jdk/bin/java: Permission denied

解决:

在/etc/profile中增加ES_JAVA_HOME环境变量:

export ES_JAVA_HOME=/usr/local/soft/jdk-17.0.11

3,报错信息:

Caused by: java.nio.file.AccessDeniedException: 
/usr/local/soft/elasticsearch-8.14.2/config/elasticsearch.yml

查看配置文件的权限:

[lhdop@iZ2zejc9t0hf6pnw6sewrxZ ~]$ ll /usr/local/soft/elasticsearch-8.14.2/config/elasticsearch.yml
-rw-rw---- 1 root root 4052 Jul 10 12:10 /usr/local/soft/elasticsearch-8.14.2/config/elasticsearch.yml

解决:

[root@blog ~]# ll /usr/local/soft/elasticsearch-8.14.2/config/elasticsearch.yml
-rw-rw---- 1 lhdop lhdop 4052 Jul 10 12:10 /usr/local/soft/elasticsearch-8.14.2/config/elasticsearch.yml

 

六，测试效果

访问9200端口的返回: