ElasticSearch6.X 下载与安装

浅浅的花香味﹌ 2022-05-29 13:38 291阅读 0赞

**1.ElasticSearch 对 jdk版本要求**

ES          JDK
    0.90        1.6
    ----------------
    1.3         1.7
    ...         1.7
    2.4         1.7
    ----------------
    5.0         1.8     
    ...         1.8
    6.X         1.8
    ...         ...
     ?           ?

**2.jdk配置**  
请参考：[centOS 7.4 安装配置jdk1.8][centOS 7.4 _jdk1.8]  
**3.（1）ElasticSearch6.2.3 下载**  
*也可在官网下载后上传*

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.3.tar.gz

![这里写图片描述][70]  
**（2）解压缩**

tar -zxvf elasticsearch-6.2.3.tar.gz

**(3)创建用户**  
*从5.0开始，ElasticSearch 安全级别提高了，不允许采用root帐号启动，所以我们要添加一个用户。*

useradd www            # 创建用户
    passwd www             # 设置该用户名密码

**(4)修改目录权限**

chmod 777 -R elasticsearch-6.2.3

**(5)切换用户启动**

su www
    ./elasticsearch-6.2.3/bin/elasticsearch

*自动关闭，报错啦。。。*

ERROR: [1] bootstrap checks failed
    max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
    max number of threads [1024] for user [lishang] likely too low, increase to at least [2048]

**解决：**切换到root用户，  
*（1）编辑limits.conf 添加类似如下内容*

vi /etc/security/limits.conf

添加如下内容:

* hard nofile 65536
    * soft nofile 65536
    
    * soft nproc 2048
    * hard nproc 4096
    
    # End of file

*（2）修改/etc/sysctl.conf*  
添加如下内容

vm.max_map_count=262144

再次启动成功啦。。。  
**（6）停止**

ctrl+c

^C[2018-03-24T23:17:30,185][INFO ][o.e.n.Node ] [VG9Zem6] stopping ...
    [2018-03-24T23:17:30,205][INFO ][o.e.n.Node ] [VG9Zem6] stopped
    [2018-03-24T23:17:30,205][INFO ][o.e.n.Node ] [VG9Zem6] closing ...
    [2018-03-24T23:17:30,213][INFO ][o.e.n.Node ] [VG9Zem6] closed

**(7)后台启动**

./bin/elasticsearch -d

**(8)查看进程**

jps
    
    1925 Jps
    1882 Elasticsearch
    或者：
    ps -ef|grep elasticsearch

**（8）.验证**  
使用curl

curl http://localhost:9200
    {
      "name" : "VG9Zem6",
      "cluster_name" : "elasticsearch",
      "cluster_uuid" : "9QO-zLXJRJyzbW9cJM2dLQ",
      "version" : {
        "number" : "6.2.3",
        "build_hash" : "c59ff00",
        "build_date" : "2018-03-13T10:06:29.741383Z",
        "build_snapshot" : false,
        "lucene_version" : "7.2.1",
        "minimum_wire_compatibility_version" : "5.6.0",
        "minimum_index_compatibility_version" : "5.0.0"
      },
      "tagline" : "You Know, for Search"
    }

[centOS 7.4 _jdk1.8]: http://blog.csdn.net/fxbin123/article/details/78503014
[70]: /images/20220529/05f0a28d5714490a9cade25bfb50e3ae.png