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Linux服务器安装部署单机版Elasticsearch

Linux服务器安装部署单机版Elasticsearch

作者: 开发者连小超 | 来源:发表于2019-06-25 15:58 被阅读0次

    一、安装Elasticsearch

    1、官网(https://www.elastic.co/cn/downloads/elasticsearch)下载 elasticsearch-6.3.0.tar.gz
    2、使用MobaXterm登陆服务器,上传安装包到soft目录下

    [root@xxx] cd / 
    [root@xxx] mkdir soft
    

    3、解压安装

    [root@xxx] cd /soft
    [root@xxx] tar -zxvf elasticsearch-6.3.0.tar.gz 
    

    4、为方便使用,将elasticsearch-6.3.0文件夹名字修改为elasticsearch
    5、配置外网访问

    [root@xxx elasticsearch] cd /soft/elasticsearch
    [root@xxx elasticsearch-6.3.0] vim ./config/elasticsearch.yml
    
    # ---------------------------------- Network -----------------------------------
    #
    # Set the bind address to a specific IP (IPv4 or IPv6):
    #
    network.host: 0.0.0.0 #修改为0.0.0.0,表示让外网访问
    #
    # Set a custom port for HTTP:
    #
    #http.port: 9200
    #
    # For more information, consult the network module documentation.
    
    # --------------------------------- Discovery ----------------------------------
    #
    # Pass an initial list of hosts to perform discovery when new node is started:
    # The default list of hosts is ["127.0.0.1", "[::1]"]
    #
    discovery.zen.ping.unicast.hosts: ["192.168.26.28"] #配置服务器公网地址
    #
    # Prevent the "split brain" by configuring the majority of nodes (total number of master-eligible nodes / 2 + 1):
    #
    #discovery.zen.minimum_master_nodes:
    #
    # For more information, consult the zen discovery module documentation.
    

    6、elasticsearch不能使用超级用户root运行,需要建立一个账号用于启动

    #添加用户
    [root@xxx elasticsearch] adduser eslian 
    #设置密码
    [root@xxx elasticsearch] passwd eslian
    

    7、给eslian用户授权elasticsearch目录

    [root@xxx elasticsearch] sudo chown -R eslian /usr/elasticsearch
    [root@xxx elasticsearch] sudo chgrp -R eslian /usr/elasticsearch
    

    8、切换至elasticsearch目录,并以eslian用户运行

    [root@xxx elasticsearch] cd /soft/elasticsearch
    [root@xxx elasticsearch] su eslian
    [root@xxx elasticsearch] ./bin/elasticsearch
    

    备注:如果想后台运行,执行 ./bin/elasticsearch -d
    停止elasticsearch服务

    #前台启动,使用Ctrl+C停止
    #后台运行,使用kill -9停止
    [root@xxx elasticsearch]  ps -ef|grep elasticsearch 
    [root@xxx elasticsearch]  kill -9 进程号
    

    9、测试是否启动成功
    新开一个终端,用curl访问

    [root@xxx /] curl 'http://127.0.0.1:9200/?pretty' 
    

    返回下面结果证明成功

    {
      "name" : "4nu2-gx",
      "cluster_name" : "elasticsearch",
      "cluster_uuid" : "nMlrViNkSWejHskq0cVNXw",
      "version" : {
        "number" : "6.3.0",
        "build_flavor" : "default",
        "build_type" : "tar",
        "build_hash" : "424e937",
        "build_date" : "2018-06-11T23:38:03.357887Z",
        "build_snapshot" : false,
        "lucene_version" : "7.3.1",
        "minimum_wire_compatibility_version" : "5.6.0",
        "minimum_index_compatibility_version" : "5.0.0"
      },
      "tagline" : "You Know, for Search"
    }
    

    注意:安装完成后外部访问(如使用Java代码操作)elasticsearch,不要忘记开放9200端口,如果是阿里云服务器,应该给9200端口添加安全组规则。

    二、Elasticsearch安装经常报错的解决方法

    1、java.lang.RuntimeException: can not run elasticsearch as root

    提示不能使用root用户来启动elasticsearch
    解决方法:su cylian 切换用户来启动即解决

    2、java.io.FileNotFoundException: /soft/elasticsearch/logs/elasticsearch.log(Permission denied)

    提示权限不足
    解决方法:切换到root用户,执行上述步骤7即可

    3、max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]

    解决方法:切换到root用户,编辑 limits.conf

    vim /etc/security/limits.conf  
    #添加如下内容:
    * soft nofile 65536
    * hard nofile 65536
    * soft nproc 2048
    * hard nproc 4096
    #注意要有*号
    

    4、max number of threads [3802] for user [eslian] is too low, increase to at least [4096]

    解决方法:切换到root用户,进入limits.d目录下修改配置文件

    vim /etc/security/limits.d/90-nproc.conf 
    #修改如下内容:
    * soft nproc 1024
    #修改为
    * soft nproc 4096
    

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

    解决方法:切换到root用户,修改配置sysctl.conf

    vim /etc/sysctl.conf 
    #添加下面配置:
    vm.max_map_count=655360
    #并执行命令:
    sysctl -p
    

    配置完成后,重新启动elasticsearch,即可启动成功。

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