Hadoop伪分布式 Wordcount cnblog hadoop伪分布式搭建实验报告

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智能开发先锋 2024-07-23 10:29:46

文章标签 大数据运维开发工具 hadoop xml 文章分类 Hadoop 大数据

1.准备Linux环境
   1.0点击VMware快捷方式，右键打开文件所在位置 -> 双击vmnetcfg.exe -> VMnet1 host-only ->修改subnet ip 设置网段：192.168.8.0 子网掩码：255.255.255.0 -> apply -> ok
       回到windows --> 打开网络和共享中心 -> 更改适配器设置 -> 右键VMnet1 -> 属性 -> 双击IPv4 -> 设置windows的IP：192.168.8.100 子网掩码：255.255.255.0 -> 点击确定
       在虚拟软件上 --My Computer -> 选中虚拟机 -> 右键 -> settings -> network adapter -> host only -> ok
   1.1修改主机名
       vim /etc/sysconfig/network

       NETWORKING=yes
       HOSTNAME=itcast01    ###

   1.2修改IP
       两种方式：
       第一种：通过Linux图形界面进行修改（强烈推荐）
           进入Linux图形界面 -> 右键点击右上方的两个小电脑 -> 点击Edit connections -> 选中当前网络System eth0 -> 点击edit按钮 -> 选择IPv4 -> method选择为manual -> 点击add按钮 -> 添加IP：192.168.8.118 子网掩码：255.255.255.0 网关：192.168.1.1 -> apply

       第二种：修改配置文件方式（屌丝程序猿专用）

vim /etc/sysconfig/network-scripts/ifcfg-eth0 
  
             
  
            DEVICE="eth0" 
  
            BOOTPROTO="static"               ### 
  
            HWADDR="00:0C:29:3C:BF:E7" 
  
            IPV6INIT="yes" 
  
            NM_CONTROLLED="yes" 
  
            ONBOOT="yes" 
  
            TYPE="Ethernet" 
  
            UUID="ce22eeca-ecde-4536-8cc2-ef0dc36d4a8c" 
  
            IPADDR="192.168.8.118"           ### 
  
            NETMASK="255.255.255.0"          ### 
  
            GATEWAY="192.168.8.1"            ### 
  
             
  
    1.3修改主机名和IP的映射关系 
  
        vim /etc/hosts 
  
             
  
        192.168.8.118    itcast01 
  
     
  
    1.4关闭防火墙 
  
        #查看防火墙状态 
  
        service iptables status 
  
        #关闭防火墙 
  
        service iptables stop 
  
        #查看防火墙开机启动状态 
  
        chkconfig iptables --list 
  
        #关闭防火墙开机启动 
  
        chkconfig iptables off 
  
     
  
    1.5重启Linux 
  
        reboot 
  

2.安装JDK 
  
    2.1上传 
  
     
  
    2.2解压jdk 
  
        #创建文件夹 
  
        mkdir /usr/java 
  
        #解压 
  
        tar -zxvf jdk-7u55-linux-i586.tar.gz -C /usr/java/ 
  
         
  
    2.3将java添加到环境变量中 
  
        vim /etc/profile 
  
        #在文件最后添加 
  
        export JAVA_HOME=/usr/java/jdk1.7.0_55 
  
        export PATH=$PATH:$JAVA_HOME/bin 
  
     
  
        #刷新配置 
  
        source /etc/profil 
  
         
  
3.安装hadoop2.4.1 
  
    注意：hadoop2.x的配置文件$HADOOP_HOME/etc/hadoop 
  
    伪分布式需要修改5个配置文件 
  
    3.1配置hadoop 
  
    第一个：hadoop-env.sh 
  
        vim hadoop-env.sh 
  
        #第27行 
  
        export JAVA_HOME=/usr/java/jdk1.7.0_65 
  
         
  
    第二个：core-site.xml 
  
        <!-- 制定HDFS的老大（NameNode）的地址 --> 
  
        <property> 
  
            <name>fs.defaultFS</name> 
  
            <value>hdfs://itcast01:9000</value> 
  
        </property> 
  
        <!-- 指定hadoop运行时产生文件的存储目录 --> 
  
        <property> 
  
            <name>hadoop.tmp.dir</name> 
  
            <value>/itcast/hadoop-2.4.1/tmp</value> 
  
        </property> 
  
         
  
    第三个：hdfs-site.xml 
  
        <!-- 指定HDFS副本的数量 --> 
  
        <property> 
  
            <name>dfs.replication</name> 
  
            <value>1</value> 
  
        </property> 
  
         
  
    第四个：mapred-site.xml (mv mapred-site.xml.template mapred-site.xml) 
  
        mv mapred-site.xml.template mapred-site.xml 
  
        vim mapred-site.xml 
  
        <!-- 指定mr运行在yarn上 --> 
  
        <property> 
  
            <name>mapreduce.framework.name</name> 
  
            <value>yarn</value> 
  
        </property> 
  
         
  
    第五个：yarn-site.xml 
  
        <!-- 指定YARN的老大（ResourceManager）的地址 --> 
  
        <property> 
  
            <name>yarn.resourcemanager.hostname</name> 
  
            <value>itcast01</value> 
  
        </property> 
  
        <!-- reducer获取数据的方式 --> 
  
        <property> 
  
            <name>yarn.nodemanager.aux-services</name> 
  
            <value>mapreduce_shuffle</value> 
  
        </property> 
  
     
  
    3.2将hadoop添加到环境变量 
  
     
  
    vim /etc/proflie 
  
        export JAVA_HOME=/usr/java/jdk1.7.0_65 
  
        export HADOOP_HOME=/itcast/hadoop-2.4.1 
  
        export PATH=$PATH:$JAVA_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin 
  

    source /etc/profile

   3.3格式化namenode（是对namenode进行初始化）
       hdfs namenode -format (hadoop namenode -format)

   3.4启动hadoop
       先启动HDFS
       sbin/start-dfs.sh

       再启动YARN
       sbin/start-yarn.sh

   3.5验证是否启动成功
       使用jps命令验证
       27408 NameNode
       28218 Jps
       27643 SecondaryNameNode
       28066 NodeManager
       27803 ResourceManager
       27512 DataNode

       http://192.168.8.118:50070 （HDFS管理界面）
       http://192.168.8.118:8088 （MR管理界面）

4.配置ssh免登陆
   #生成ssh免登陆密钥
   #进入到我的home目录
   cd ~/.ssh

   ssh-keygen -t rsa （四个回车）
   执行完这个命令后，会生成两个文件id_rsa（私钥）、id_rsa.pub（公钥）
   将公钥拷贝到要免登陆的机器上
   ssh-copy-id localhost

开启Hadoop时，出现如下信息：

解决办法：

[root@hd-m1 /]# ./hadoop/hadoop-2.6.0/sbin/start-all.sh 
 This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
 15/01/23 20:23:41 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
 Starting namenodes on [Java HotSpot(TM) Client VM warning: You have loaded library /hadoop/hadoop-2.6.0/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
 It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
 hd-m1]
 sed: -e expression #1, char 6: unknown option to `s'
 -c: Unknown cipher type 'cd'
hd-m1: starting namenode, logging to /hadoop/hadoop-2.6.0/logs/hadoop-root-namenode-hd-m1.out
 HotSpot(TM): ssh: Could not resolve hostname HotSpot(TM): Temporary failure in name resolution
 Java: ssh: Could not resolve hostname Java: Temporary failure in name resolution
 Client: ssh: Could not resolve hostname Client: Temporary failure in name resolution
 You: ssh: Could not resolve hostname You: Temporary failure in name resolution
 warning:: ssh: Could not resolve hostname warning:: Temporary failure in name resolution
 VM: ssh: Could not resolve hostname VM: Temporary failure in name resolution
 have: ssh: Could not resolve hostname have: Temporary failure in name resolution
 library: ssh: Could not resolve hostname library: Temporary failure in name resolution
 loaded: ssh: Could not resolve hostname loaded: Temporary failure in name resolution
 might: ssh: Could not resolve hostname might: Temporary failure in name resolution
 which: ssh: Could not resolve hostname which: Temporary failure in name resolution
 have: ssh: Could not resolve hostname have: Temporary failure in name resolution
 disabled: ssh: Could not resolve hostname disabled: Temporary failure in name resolution
 stack: ssh: Could not resolve hostname stack: Temporary failure in name resolution
 guard.: ssh: Could not resolve hostname guard.: Temporary failure in name resolution
 VM: ssh: Could not resolve hostname VM: Temporary failure in name resolution
 The: ssh: Could not resolve hostname The: Temporary failure in name resolution
 try: ssh: Could not resolve hostname try: Temporary failure in name resolution
 will: ssh: Could not resolve hostname will: Temporary failure in name resolution
 to: ssh: Could not resolve hostname to: Temporary failure in name resolution
 fix: ssh: Could not resolve hostname fix: Temporary failure in name resolution
 the: ssh: Could not resolve hostname the: Temporary failure in name resolution
stack: ssh: Could not resolve hostname stack: Temporary failure in name resolution
 guard: ssh: Could not resolve hostname guard: Temporary failure in name resolution
 It's: ssh: Could not resolve hostname It's: Temporary failure in name resolution
 now.: ssh: Could not resolve hostname now.: Temporary failure in name resolution
 recommended: ssh: Could not resolve hostname recommended: Temporary failure in name resolution
 highly: ssh: Could not resolve hostname highly: Temporary failure in name resolution
 that: ssh: Could not resolve hostname that: Temporary failure in name resolution
 you: ssh: Could not resolve hostname you: Temporary failure in name resolution
 with: ssh: Could not resolve hostname with: Temporary failure in name resolution
 'execstack: ssh: Could not resolve hostname 'execstack: Temporary failure in name resolution
 the: ssh: Could not resolve hostname the: Temporary failure in name resolution
 library: ssh: Could not resolve hostname library: Temporary failure in name resolution
 fix: ssh: Could not resolve hostname fix: Temporary failure in name resolution
< libfile>',: ssh: Could not resolve hostname <libfile>',: Temporary failure in name resolution
 or: ssh: Could not resolve hostname or: Temporary failure in name resolution
 link: ssh: Could not resolve hostname link: Temporary failure in name resolution
 it: ssh: Could not resolve hostname it: Temporary failure in name resolution
'-z: ssh: Could not resolve hostname '-z: Temporary failure in name resolution
 with: ssh: Could not resolve hostname with: Temporary failure in name resolution
 noexecstack'.: ssh: Could not resolve hostname noexecstack'.: Temporary failure in name resolution
 hd-s1: starting datanode, logging to /hadoop/hadoop-2.6.0/logs/hadoop-root-datanode-hd-s1.out
 hd-s2: starting datanode, logging to /hadoop/hadoop-2.6.0/logs/hadoop-root-datanode-hd-s2.out
 Starting secondary namenodes [Java HotSpot(TM) Client VM warning: You have loaded library /hadoop/hadoop-2.6.0/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
 It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
 SecondaryNameNode]
 sed: -e expression #1, char 6: unknown option to `s'
 -c: Unknown cipher type 'cd'
 Client: ssh: Could not resolve hostname Client: Temporary failure in name resolution
 have: ssh: Could not resolve hostname have: Temporary failure in name resolution
 You: ssh: Could not resolve hostname You: Temporary failure in name resolution
 Java: ssh: Could not resolve hostname Java: Temporary failure in name resolution
 library: ssh: Could not resolve hostname library: Temporary failure in name resolution
 loaded: ssh: Could not resolve hostname loaded: Temporary failure in name resolution
 VM: ssh: Could not resolve hostname VM: Temporary failure in name resolution
 might: ssh: Could not resolve hostname might: Temporary failure in name resolution
 stack: ssh: Could not resolve hostname stack: Temporary failure in name resolution
 have: ssh: Could not resolve hostname have: Temporary failure in name resolution
 VM: ssh: Could not resolve hostname VM: Temporary failure in name resolution
 fix: ssh: Could not resolve hostname fix: Temporary failure in name resolution
 to: ssh: Could not resolve hostname to: Temporary failure in name resolution
 the: ssh: Could not resolve hostname the: Temporary failure in name resolution
 guard: ssh: Could not resolve hostname guard: Temporary failure in name resolution
 now.: ssh: Could not resolve hostname now.: Temporary failure in name resolution
 It's: ssh: Could not resolve hostname It's: Temporary failure in name resolution
disabled: ssh: Could not resolve hostname disabled: Temporary failure in name resolution
 highly: ssh: Could not resolve hostname highly: Temporary failure in name resolution
 that: ssh: Could not resolve hostname that: Temporary failure in name resolution
recommended: ssh: Could not resolve hostname recommended: Temporary failure in name resolution
 stack: ssh: Could not resolve hostname stack: Temporary failure in name resolution
try: ssh: Could not resolve hostname try: Temporary failure in name resolution
 HotSpot(TM): ssh: Could not resolve hostname HotSpot(TM): Temporary failure in name resolution
fix: ssh: Could not resolve hostname fix: Temporary failure in name resolution
the: ssh: Could not resolve hostname the: Temporary failure in name resolution
library: ssh: Could not resolve hostname library: Temporary failure in name resolution
 'execstack: ssh: Could not resolve hostname 'execstack: Temporary failure in name resolution
 warning:: ssh: Could not resolve hostname warning:: Temporary failure in name resolution
 with: ssh: Could not resolve hostname with: Temporary failure in name resolution
 or: ssh: Could not resolve hostname or: Temporary failure in name resolution
< libfile>',: ssh: Could not resolve hostname <libfile>',: Temporary failure in name resolution
 you: ssh: Could not resolve hostname you: Temporary failure in name resolution
 link: ssh: Could not resolve hostname link: Temporary failure in name resolution
 it: ssh: Could not resolve hostname it: Temporary failure in name resolution
 which: ssh: Could not resolve hostname which: Temporary failure in name resolution
 with: ssh: Could not resolve hostname with: Temporary failure in name resolution
 The: ssh: Could not resolve hostname The: Temporary failure in name resolution
 noexecstack'.: ssh: Could not resolve hostname noexecstack'.: Temporary failure in name resolution
 '-z: ssh: Could not resolve hostname '-z: Temporary failure in name resolution
 will: ssh: Could not resolve hostname will: Temporary failure in name resolution
 SecondaryNameNode: ssh: Could not resolve hostname SecondaryNameNode: Temporary failure in name resolution
guard.: ssh: Could not resolve hostname guard.: Temporary failure in name resolution
 15/01/23 20:24:48 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
starting yarn daemons
 starting resourcemanager, logging to /hadoop/hadoop-2.6.0/logs/yarn-root-resourcemanager-hd-m1.out
 hd-s1: starting nodemanager, logging to /hadoop/hadoop-2.6.0/logs/yarn-root-nodemanager-hd-s1.out
 hd-s2: starting nodemanager, logging to /hadoop/hadoop-2.6.0/logs/yarn-root-nodemanager-hd-s2.out

出现上述问题主要是环境变量没设置好，在~/.bash_profile或者/etc/profile中加入以下语句就没问题了。

#vi /etc/profile或者vi ~/.bash_profile
　　　　export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
　　　　export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

然后用source重新编译使之生效即可！
　　#source /etc/profile或者source ~/.bash_profile

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