0
点赞
收藏
分享

微信扫一扫

Hadoop集群分布式安装

是波波呀 2022-03-11 阅读 61
linuxhadoop
  • 先创建三台linux的虚拟机

  • 先创建三台linux的虚拟机

  • 集群规划
    主机 角色
    node1 NN DN RM NM
    node2 SNN DN NM
    node3 DN NM

  • 基础环境
    3台机器都需要操作
    # 主机名
    cat /etc/hostname

    # hosts映射
    vim /etc/hosts
    
    127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
    ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
    
    192.168.88.151 node1.itcast.cn node1
    192.168.88.152 node2.itcast.cn node2
    192.168.88.153 node3.itcast.cn node3
    
    # JDK 1.8安装  上传 jdk-8u241-linux-x64.tar.gz到/export/server/目录下
    cd /export/server/
    tar zxvf jdk-8u241-linux-x64.tar.gz
    
    	#配置环境变量
    	vim /etc/profile
    	
    	export JAVA_HOME=/export/server/jdk1.8.0_241
    	export PATH=$PATH:$JAVA_HOME/bin
    	export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
    	
    	#重新加载环境变量文件
    	source /etc/profile
    
    # 集群时间同步
    ntpdate ntp5.aliyun.com(只要是新建虚拟机时选择的时区相同,并且联网,这条语句并不重要)
    
    # 防火墙关闭
    firewall-cmd --state	#查看防火墙状态
    systemctl stop firewalld.service  #停止firewalld服务
    systemctl disable firewalld.service  #开机禁用firewalld服务
    
    # ssh免密登录(只需要配置node1至node1、node2、node3即可)
    
    	#node1生成公钥私钥 (一路回车)
    	ssh-keygen  
    	
    	#node1配置免密登录到node1 node2 node3
    	ssh-copy-id node1
    	ssh-copy-id node2
    	ssh-copy-id node3
    
  • 上传Hadoop安装包到node1 /export/server

  • 修改配置文件(配置文件路径 hadoop-3.3.0/etc/hadoop)
    • hadoop-env.sh
  • core-site.xml
  • hdfs-site.xml

     <!-- 设置SNN进程运行机器位置信息 -->
     <property>
         <name>dfs.namenode.secondary.http-address</name>
         <value>node2:9868</value>
     </property>
    
  • mapred-site.xml

      <!-- 设置MR程序默认运行模式: yarn集群模式 local本地模式 -->
      <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
      </property>
      
      <!-- MR程序历史服务地址 -->
      <property>
        <name>mapreduce.jobhistory.address</name>
        <value>node1:10020</value>
      </property>
       
      <!-- MR程序历史服务器web端地址 -->
      <property>
        <name>mapreduce.jobhistory.webapp.address</name>
        <value>node1:19888</value>
      </property>
      
      <property>
        <name>yarn.app.mapreduce.am.env</name>
        <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
      </property>
      
      <property>
        <name>mapreduce.map.env</name>
        <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
      </property>
      
      <property>
        <name>mapreduce.reduce.env</name>
        <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
      </property>
    
    • yarn-site.xml
  • workers
  • 分发同步hadoop安装包
  • 将hadoop添加到环境变量(3台机器)
    vim /etc/profile

    export HADOOP_HOME=/export/server/hadoop-3.3.0
    export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
    
    source /etc/profile
    
    
    #别忘了scp给其他两台机器哦
    
  • Hadoop集群启动

    • 首次启动)格式化namenode
  • 脚本一键启动

    ```[root@node1 ~]# start-dfs.sh 
    Starting namenodes on [node1]
    Last login: Thu Nov  5 10:44:10 CST 2020 on pts/0
    Starting datanodes
    Last login: Thu Nov  5 10:45:02 CST 2020 on pts/0
    Starting secondary namenodes [node2]
    Last login: Thu Nov  5 10:45:04 CST 2020 on pts/0
    
    [root@node1 ~]# start-yarn.sh 
    Starting resourcemanager
    Last login: Thu Nov  5 10:45:08 CST 2020 on pts/0
    Starting nodemanagers
    Last login: Thu Nov  5 10:45:44 CST 2020 on pts/0
    
  • Web UI页面

    • HDFS集群:http://node1:9870/
    • YARN集群:http://node1:8088/
  • 同时需要添加虚拟机在本地主机的主机映射,以便可以通过别名访问web ui界面


  • 错误1:运行hadoop3官方自带mr示例出错。
    • 错误信息

       
       Please check whether your etc/hadoop/mapred-site.xml contains the below configuration:
       <property>
         <name>yarn.app.mapreduce.am.env</name>
         <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
       </property>
       <property>
         <name>mapreduce.map.env</name>
         <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
       </property>
       <property>
         <name>mapreduce.reduce.env</name>
         <value>HADOOP_MAPRED_HOME=${full path of your hadoop distribution directory}</value>
       </property>
      
    • 解决 mapred-site.xml,增加以下配置

         <name>yarn.app.mapreduce.am.env</name>
         <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
       </property>
       <property>
         <name>mapreduce.map.env</name>
         <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
       </property>
       <property>
         <name>mapreduce.reduce.env</name>
         <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
       </property>
      
      
      
举报

相关推荐

0 条评论