ElasticSearch（三）------安装elasticsearch6.3.2（linux环境）

偏执的太偏执、 2023-06-04 09:53 103阅读 0赞

**前提**：安装jdk环境

## 一、下载地址 ##

下载elasticsearch对应版本的安装包

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.3.2.tar.gz
    
    https://download.csdn.net/download/qq_29914837/11834996

## 二、安装elasticsearch ##

**进入home目录下**

cd /home

**创建文件夹elastic**

mkdir elastic

**上传linux版本的es6.2.2的安装包**

**解压**

tar -zxvf elasticsearch-6.2.3.tar.gz

**删除压缩包**

rm -f elasticsearch-6.2.3.tar.gz

**启动es服务器**

cd elasticsearch-6.2.3/
    #按ctrl+c后es服务自动关闭
    ./bin/elasticsearch
    #后台启动
    ./bin/elasticsearch -d

**启动报错：不能使用root用户启动服务**

2019-10-07T20:21:35,823][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
    org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
            at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:125) ~[elasticsearch-6.2.3.jar:6.2.3]
            at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-6.2.3.jar:6.2.3]
            at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.2.3.jar:6.2.3]
            at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.2.3.jar:6.2.3]
            at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.2.3.jar:6.2.3]
            at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-6.2.3.jar:6.2.3]
            at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85) ~[elasticsearch-6.2.3.jar:6.2.3]
    Caused by: java.lang.RuntimeException: can not run elasticsearch as root
            at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:105) ~[elasticsearch-6.2.3.jar:6.2.3]
            at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:172) ~[elasticsearch-6.2.3.jar:6.2.3]
            at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:323) ~[elasticsearch-6.2.3.jar:6.2.3]
            at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[elasticsearch-6.2.3.jar:6.2.3]
            ... 6 more

添加用户
    useradd  esuser
    passwd  esuser
    我这里设置密码为123456

**切换到esuser用户下启动**

su esuser
    ./bin/elasticsearch -d
     tail -f logs/elasticsearch.log

**启动报错：没有jvm文件的权限，改一下所属的用户**

Exception in thread "main" java.nio.file.AccessDeniedException: /home/elastic/el                asticsearch-6.2.3/config/jvm.options
            at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84                )
            at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
            at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
            at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvid                er.java:214)
            at java.nio.file.Files.newByteChannel(Files.java:361)
            at java.nio.file.Files.newByteChannel(Files.java:407)
            at java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvide                r.java:384)
            at java.nio.file.Files.newInputStream(Files.java:152)
            at org.elasticsearch.tools.launchers.JvmOptionsParser.main(JvmOptionsPar                ser.java:58)

切换到root用户下，给esuser用户赋权限

su root
    chown esuser /home/elastic/elasticsearch-6.2.3/ -R

**启动打印出现warn提示**

[2019-10-07T20:33:08,148][WARN ][o.e.b.BootstrapChecks    ] [tsVOtDK] max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
    
    [2019-10-07T20:33:08,148][WARN ][o.e.b.BootstrapChecks    ] [tsVOtDK] max number of threads [3795] for user [esuser] is too low, increase to at least [4096]
    [2019-10-07T20:33:08,148][WARN ][o.e.b.BootstrapChecks    ] [tsVOtDK] max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

**原因：进程不够用了**

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

切换到root用户
    vi /etc/security/limits.conf
    #在文件末尾添加下面的参数值
    * soft nofile 65536
    * hard nofile 131072

**\#最大线程个数太低**

max number of threads [3795] for user [esuser] is too low, increase to at least [4096]

切换到root用户
    vi /etc/security/limits.conf
    #在文件末尾添加下面的参数值
    * soft nproc 5000
    * hard nproc 5000
    root soft nproc 5000
    root hard nproc 5000

**\#esuser用户拥有的内存权限太小**

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

su root
    vi /etc/sysctl.conf 
    #末尾添加
    vm.max_map_count=655360
    #保存退出
    #执行命令查看sysctl.conf文件是否生效
    sysctl -p
    重启es

**安装完毕，验证是否安装成功**

ps -ef|grep elasticsearch
    curl localhost:9200

## 三、修改elasticsearch的config目录下的elasticsearch.yml文件 ##

#0.0.0.0 表示不限制访问，或者指定本台服务器ip
    network.host: 0.0.0.0

![在这里插入图片描述][20191008143019900.png]  
![在这里插入图片描述][20191008143131122.png]  
其它配置不作过多介绍了。

## 四、配置elasticsearch服务开机自启动 ##

su root
    #创建elasticsearch文件
     vi /etc/init.d/elasticsearch

**内容如下:其中jdk路径和elasticsearch安装目录路径安装安装自己的更改即可！esuser为创建的用户**

#!/bin/sh
    #chkconfig: 2345 80 05
    #description: elasticsearch
     
    export JAVA_HOME=/usr/local/java/jdk1.8.0_191
    export JAVA_BIN=/usr/local/java/jdk1.8.0_191/bin
    export PATH=$PATH:$JAVA_HOME/bin
    export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
    export JAVA_HOME JAVA_BIN PATH CLASSPATH
     
    case "$1" in
    start)
    su esuser<<!
    cd /home/elastic/elasticsearch-6.2.2
    ./bin/elasticsearch -d
    !
    echo "elasticsearch startup"
    ;;
    stop)
    es_pid=`ps aux|grep elasticsearch | grep -v 'grep elasticsearch' | awk '{print $2}'`
    kill -9 $es_pid
    echo "elasticsearch stopped"
    ;;
    restart)
    es_pid=`ps aux|grep elasticsearch | grep -v 'grep elasticsearch' | awk '{print $2}'`
    kill -9 $es_pid
    echo "elasticsearch stopped"
    su esuser<<!
    cd /home/elastic/elasticsearch-6.2.2
    ./bin/elasticsearch -d
    !
    echo "elasticsearch startup"
    ;;
    *)
    echo "start|stop|restart"
    ;;
    esac
     
    exit $?

**保存退出，赋予该脚本执行权限**

chmod +x /etc/init.d/elasticsearch

**将elasticsearch添加到开机启动任务**

chkconfig --add /etc/init.d/elasticsearch

## 五、elasticsearch集群安装 ##

elasticsearch集群安装步骤与单机安装基本一致。

首先建议准备最少三台es服务器，避免脑裂。

[如何防止elasticsearch的脑裂问题][elasticsearch]

**1、三台es服务器安装单机安装，如果单独启动没有问题的话，再修改为ES集群配置**

**2、修改elasticsearch.yml 文件**

vi  elasticsearch.yml
    
    #该3个es节点的集群名称必须相同
    cluster.name: my-application  
    
    #每个节点名称不能相同，另外两台分别为node2 ,node3
    node.name:node1  
    
    #将所有节点里面的地址修改为所有节点的IP，","除了逗号不要有空格
    discovery.zen.ping.unicast.hosts: ["192.168.68.133", "192.168.68.134","192.168.68.135"]  
    
    #默认是1，3台节点建议修改为2，防止ES脑裂
    discovery.zen.minimum_master_nodes: 2

**3、查看集群效果**

http://192.168.68.133:9200/\_cat/nodes?pretty

效果：会显示三台es服务器ip地址

--------------------

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[20191008143019900.png]: /images/20230601/982ce9c9f6ab44b3ba6ed7e9b068ce81.png
[20191008143131122.png]: /images/20230601/4db36a1b633c4de99915db98c353e7e0.png
[elasticsearch]: https://www.cnblogs.com/zhukunrong/p/5224558.html