ElasticSearch安装

末蓝、 2022-10-02 11:59 169阅读 0赞

之前项目中用过ElasticSearch，是一个不错的搜索引擎，现在想深入的学习一下，尝试自己安装，遇到不少困难，踩了不少坑，参考网上很多优秀的文章得以解决，下面对自己的安装过程做一个记录：

# 一、环境准备 #

*  虚拟机、jdk还用原先准备好的，环境准备可以参考另一篇文章[环境搭建][Link 1]
 *  下载elasticsearch安装包  
    *下载链接*：https://pan.baidu.com/s/1G9AmQ3iflTl4R7hJvjVbPA  
    提取码：jjg6

# 二、安装es #

### 1、将压缩包上传到虚拟机指定目录，并解压，整体命令如下： ###

[root@localhost ~]# cd /usr
    [root@localhost usr]# mkdir elastic
    [root@localhost usr]# cd elastic
    [root@localhost elastic]# rz
    [root@localhost elastic]# tar -zxvf elasticsearch-7.1.1-linux-x86_64.tar.gz
    [root@localhost elastic]# ls
    elasticsearch-7.1.1  elasticsearch-7.1.1-linux-x86_64.tar.gz

# 三、启动 #

启动可能会遇到很多问题，需要做相应配置：

### 1、不支持root用户启动 ###

需要创建其他用户登录，赋予权限，并启动

*  添加并切换用户

user add zrk
    tail -1 /etc/passwd
    passwd zrk
    chown -R zrk elasticsearch-7.1.1
    su - zrk

*  启动

cd /usr/elastic/elasticsearch-7.1.1/bin
    ./elasticsearch
    #后台启动
    ./elasticsearch -d

### 2、bootstrap checks failed ###

报错信息：

ERROR: [4] bootstrap checks failed
    [1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
    [2]: max number of threads [3891] for user [zrk] is too low, increase to at least [4096]
    [3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
    [4]: 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

解决方法：[参考链接][Link 2]

### 3、外网无法访问 ###

通过浏览器无法访问到虚拟机的9200端口  
解决办法：[参考链接][Link 3]

### 4、其他错误 ###

执行命令正常启动，但是无法启动，这时需要打开日志看具体报错，然后逐一解决：

-bash-4.2$ curl localhost:9200
    curl: (7) Failed connect to localhost:9200; Connection refused
    -bash-4.2$ ps -ef | grep elasticsearch
    zrk       3543  3434  0 21:14 pts/1    00:00:00 grep --color=auto elasticsearch

日志在logs文件夹下  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxMDY3MzA3_size_16_color_FFFFFF_t_70]

[1] bootstrap checks failed
    [1]: 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：[参考链接][Link 4]

# 四、访问 #

[root@localhost elastic]# curl localhost:9200
    {
      "name" : "localhost.localdomain",
      "cluster_name" : "elasticsearch",
      "cluster_uuid" : "Z3U7OMa7QDOEmP9Cdw69dg",
      "version" : {
        "number" : "7.1.1",
        "build_flavor" : "default",
        "build_type" : "tar",
        "build_hash" : "7a013de",
        "build_date" : "2019-05-23T14:04:00.380842Z",
        "build_snapshot" : false,
        "lucene_version" : "8.0.0",
        "minimum_wire_compatibility_version" : "6.8.0",
        "minimum_index_compatibility_version" : "6.0.0-beta1"
      },
      "tagline" : "You Know, for Search"
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxMDY3MzA3_size_16_color_FFFFFF_t_70 1]  
虚拟机、浏览器(postman代替)皆可访问

# 五、参考链接 #

*  [ElasticSearch学习笔记（一）ElasticSearch安装][Link 2]
 *  [解决Elasticsearch外网访问的问题][Link 3]

[Link 1]: https://blog.csdn.net/qq_21067307/article/details/89927587
[Link 2]: https://blog.csdn.net/q15150676766/article/details/75578614
[Link 3]: https://blog.csdn.net/wd2014610/article/details/89532638
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[Link 4]: https://www.cnblogs.com/hellxz/p/11057234.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxMDY3MzA3_size_16_color_FFFFFF_t_70 1]: /images/20220112/62df952159fc40a6af0099730fcd9859.png