ubuntu安装elasticsearch

Posted 2020-11-01 dycsy

0x00安装jdk

ElasticSearch需要安装jdk1.8以上版本的支持，所以需要先安装jdk。linux下如何安装可以查看另一篇博客

0x01 下载elasticsearch

在es官网下载tar版本

直接使用wget命令

wget  https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.4.tar.gz 

使用tar -zxvf 压缩包名 解压缩

注意：启动elasticsearch的时候必须要切换成普通用户，不然会报错

chown -R elastic:elastic /home/es/elasticsearch-5.5.2/

给予足够的权限，不然会报错Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/elasticsearch-6.2.2/config/jvm.options

0x03配置外部访问

进行安装目录的config目录下，修改elasticsearch.yml文件,修改点如下(要去掉#号注释)

network.host:0.0.0.0 
http.port:9200

0x04修改重启后出现俩个问题

[1]: max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

1.max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536]

修改/etc/security/limits.conf，添加或者修改如下（切换root用户）

*  hard  nofile  65536
*  soft   nofile  65536

2.[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

最后可以成功访问，如果是在阿里云记得要在安全端口配置中把9200给添加进去

如果出现内存不足的话，可能是本机内存不足了