CENTOS安装ElasticSearch

﹏ヽ暗。殇╰゛Y 2022-07-16 12:12 117阅读 0赞

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#### ElasticSearch 概述 ####

>  *  ElasticSearch是一个高可扩展的开源的全文搜索分析引擎。   
>     它允许你快速的存储、搜索和分析大量数据。ElasticSearch通常作为后端程序，为需要复杂查询的应用提供服务。
>  *  Elasticsearch是一个基于Lucene的开源分布式搜索引擎，具有分布式多用户能力。Elasticsearch是用java开发，提供Restful接口，能够达到实时搜索、高性能计算；同时Elasticsearch的横向扩展能力非常强，不需要重启服务，基本上达到了零配置。

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#### ElasticSearch 安装 ####

##### 安装前准备 #####

>  *  安装JDK7及以上版本(这里不再讲述JDK安装步骤)
>  *  下载ElasticSearch安装包，[点击][Link 1] 获取elasticsearch-2.1.1.tar.gz安装包

##### 安装ElasticSearch #####

>  *  运行下面命令将安装包移动到 /opt 目录，然后转到 opt 目录
>     
>         mv elasticsearch-2.1.1.tar.gz /opt cd /opt
>  *  解压安装包,然后重命名为 elasticsearch
>     
>         tar zxvf elasticsearch-2.1.1.tar.gz mv elasticsearch-2.1.1 elasticsearch
>  *  进入elasticsearch/bin下运行elasticsearch脚本启动
>     
>         cd elasticsearch/bin
>             ./elasticsearch

##### 如果是用root启动，需要继续下面步骤 #####

>  *  如果是用root账号启动，会报以下错误
>     
>         Exception in thread "main" java.lang.RuntimeException: don't run elasticsearch as root. at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:93) at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:144) at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:285) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35) Refer to the log for complete error details.
>  *  这是出于系统安全考虑设置的条件。由于ElasticSearch可以接收用户输入的脚本并且执行，为了系统安全考虑，   
>     建议创建一个单独的用户用来运行ElasticSearch
>  *  创建elsearch用户组及elsearch用户
>     
>         groupadd elsearch
>         useradd elsearch -g elsearch -p elasticsearch
>  *  更改elasticsearch文件夹及内部文件的所属用户及组为elsearch:elsearch
>     
>         cd /opt
>         chown -R elsearch:elsearch  elasticsearch
>  *  切换到elsearch用户再启动
>     
>         su elsearch cd elasticsearch/bin
>         ./elasticsearch
>  *  启动后打印信息如下
>     
>         [2015-12-30 10:15:44,876][WARN ][bootstrap ] unable to install syscall filter: prctl(PR_GET_NO_NEW_PRIVS): Invalid argument
>         [2015-12-30 10:15:45,175][INFO ][node ] [Grim Hunter] version[2.1.1], pid[26383], build[40e2c53/2015-12-15T13:05:55Z]
>         [2015-12-30 10:15:45,176][INFO ][node ] [Grim Hunter] initializing ...
>         [2015-12-30 10:15:45,243][INFO ][plugins ] [Grim Hunter] loaded [], sites []
>         [2015-12-30 10:15:45,272][INFO ][env ] [Grim Hunter] using [1] data paths, mounts [[/ (/dev/mapper/vg_yong-lv_root)]], net usable_space [33.3gb], net total_space [49gb], spins? [no], types [ext4]
>         [2015-12-30 10:15:47,318][INFO ][node ] [Grim Hunter] initialized
>         [2015-12-30 10:15:47,318][INFO ][node ] [Grim Hunter] starting ...
>         [2015-12-30 10:15:47,388][INFO ][discovery ] [Grim Hunter] elasticsearch/fnXUCLOQQBiC1aR7hhB82Q
>         [2015-12-30 10:15:50,442][INFO ][cluster.service ] [Grim Hunter] new_master {Grim Hunter}{fnXUCLOQQBiC1aR7hhB82Q}{ 127.0.0.1}{ 127.0.0.1:9300}, reason: zen-disco-join(elected_as_master, [0] joins received)
>         [2015-12-30 10:15:50,491][INFO ][node ] [Grim Hunter] started
>         [2015-12-30 10:15:50,526][INFO ][gateway ] [Grim Hunter] recovered [0] indices into cluster_state

##### ElasticSearch后端启动命令 #####

./elasticsearch -d

[Link 1]: https://download.elasticsearch.org/elasticsearch/release/org/elasticsearch/distribution/tar/elasticsearch/2.1.1/elasticsearch-2.1.1.tar.gz