hadoop2.4.1 伪分布

        最终的 /etc/profile :#在文件最后添加

       # /etc/profile

# System wide environment and startup programs, for login setup
# Functions and aliases go in /etc/bashrc

# It's NOT a good idea to change this file unless you know what you
# are doing. It's much better to create a custom.sh shell script in
# /etc/profile.d/ to make custom changes to your environment, as this
# will prevent the need for merging in future updates.

pathmunge () {
    case ":${PATH}:" in
        *:"$1":*)
            ;;
        *)
            if [ "$2" = "after" ] ; then
                PATH=$PATH:$1
            else
                PATH=$1:$PATH
            fi
    esac
}

if [ -x /usr/bin/id ]; then
    if [ -z "$EUID" ]; then
        # ksh workaround
        EUID=`id -u`
        UID=`id -ru`
    fi
    USER="`id -un`"
    LOGNAME=$USER
    MAIL="/var/spool/mail/$USER"
fi

# Path manipulation
if [ "$EUID" = "0" ]; then
    pathmunge /sbin
    pathmunge /usr/sbin
    pathmunge /usr/local/sbin
else
    pathmunge /usr/local/sbin after
    pathmunge /usr/sbin after
    pathmunge /sbin after
fi

HOSTNAME=`/bin/hostname 2>/dev/null`
HISTSIZE=1000
if [ "$HISTCONTROL" = "ignorespace" ] ; then
    export HISTCONTROL=ignoreboth
else
    export HISTCONTROL=ignoredups
fi

export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL

# By default, we want umask to get set. This sets it for login shell
# Current threshold for system reserved uid/gids is 200
# You could check uidgid reservation validity in
# /usr/share/doc/setup-*/uidgid file
if [ $UID -gt 199 ] && [ "`id -gn`" = "`id -un`" ]; then
    umask 002
else
    umask 022
fi

for i in /etc/profile.d/*.sh ; do
    if [ -r "$i" ]; then
        if [ "${-#*i}" != "$-" ]; then
            . "$i"
        else
            . "$i" >/dev/null 2>&1
        fi
    fi
done

        
        #在文件最后添加
        export JAVA_HOME=/usr/java/jdk1.7.0_79
        export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
        export HADOOP_HOME=/usr/local/hadoop-2.4.1  
        export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
        export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib/native/"
        export PATH=$PATH:$JAVA_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$HADOOP_HOME/lib

unset i
unset -f pathmunge

ulimit -n 65535

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
         127.0.0.1   localhost
        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/profile
        
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>

===============ok=================
<configuration>
<!-- 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>/home/tempData</value>
                </property>
</configuration>
===================================

        
    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)

   17/05/16 17:13:12 INFO common.Storage: Storage directory 
     
        /usr/local/hadoop-2.4.1/tmp/dfs/name    has been successfully formatted.

[root@itcast01 dfs]# cd name
[root@itcast01 name]# ll
total 4
drwxr-xr-x. 2 root root 4096 May 16 17:13 current
[root@itcast01 name]# cd current/
[root@itcast01 current]# ll
total 16
-rw-r--r--. 1 root root 351 May 16 17:13 fsimage_0000000000000000000
-rw-r--r--. 1 root root  62 May 16 17:13 fsimage_0000000000000000000.md5
-rw-r--r--. 1 root root   2 May 16 17:13 seen_txid
-rw-r--r--. 1 root root 207 May 16 17:13 VERSION

    3.4启动hadoop  cd /usr/local/hadoop-2.4.1/sbin

        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://192.168.233.128:50070 （HDFS管理界面）
        http://192.168.233.128:8088 （MR管理界面）

                http://192.168.30.128:50070 （HDFS管理界面）
        http://192.168.30.128:8088 （MR管理界面）
*****************************************************************************************************************************************************

从日志中可以看出hadoop库不在java.library.path所配置的目录下，应该是java.library.path配置的路径有问题。在

hadoop-env.sh中重新配置：

export HADOOP_COMMON_LIB_NATIVE_DIR=${HADOOP_HOME}/lib/native

export HADOOP_OPTS="-Djava.library.path=${HADOOP_HOME}/lib/native/"

执行start-dfs.sh，告警信息不再显示。经测试，其实只需export HADOOP_OPTS即可解决问题。

验证本地库是否加载成功：hadoop checknative

        
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

login as: root
root@192.168.233.128's password:
Access denied
root@192.168.233.128's password:
Last login: Tue May  ::  from 192.168.233.7
[root@itcast01 ~]# ll
total
-rw-------.  root root   Jul    anaconda-ks.cfg
-rw-r--r--.  root root  Jul    install.log
-rw-r--r--.  root root  Jul    install.log.syslog
[root@itcast01 ~]# cd /home
[root@itcast01 home]# ll
total
drwx------.  hadoop hadoop  May  : hadoop
drwxr-xr-x.   root   root    May  : tempData
[root@itcast01 home]# cd tempData/
[root@itcast01 tempData]# ll
total
drwxr-xr-x.  root root  May  : dfs
drwxr-xr-x.  root root  May  : nm-local-dir
[root@itcast01 tempData]# cd dfs
[root@itcast01 dfs]# l
-bash: l: command not found
[root@itcast01 dfs]# ll
total
drwx------.  root root  May  : data
drwxr-xr-x.  root root  May  : name
drwxr-xr-x.  root root  May  : namesecondary
[root@itcast01 dfs]# cd name
[root@itcast01 name]# ll
total
drwxr-xr-x.  root root  May  : current
[root@itcast01 name]# cd current/
-bash: cd: current/: No such file or directory
[root@itcast01 name]# cd current/
[root@itcast01 current]# ll
total
-rw-r--r--.  root root       May  : edits_0000000000000000001-
-rw-r--r--.  root root  May  : edits_0000000000000000003-
-rw-r--r--.  root root       May  : edits_0000000000000000004-
-rw-r--r--.  root root  May  : edits_inprogress_0000000000000000006
-rw-r--r--.  root root      May  : fsimage_0000000000000000002
-rw-r--r--.  root root       May  : fsimage_0000000000000000002.md5
-rw-r--r--.  root root      May  : fsimage_0000000000000000005
-rw-r--r--.  root root       May  : fsimage_0000000000000000005.md5
-rw-r--r--.  root root        May  : seen_txid
-rw-r--r--.  root root      May  : VERSION
[root@itcast01 current]# jps
 Jps
[root@itcast01 current]# cd /usr
[root@itcast01 usr]# ll
total
dr-xr-xr-x.    root root      May  : bin
drwxr-xr-x.    root root       Sep    etc
drwxr-xr-x.    root root       Sep    games
-rw-r--r--.    root root  Aug    hadoop-2.4..tar.gz
-rw-r--r--.    root root    May  : hadoop-native--2.4..tar
drwxr-xr-x.    root root       Jul    include
drwxr-xr-x.    root root       May  : java
-rw-r--r--.    root root  May  : jdk-7u79-linux-x64.tar.gz
dr-xr-xr-x.   root root       Jul    lib
dr-xr-xr-x.  root root      May   : lib64
drwxr-xr-x.   root root      May   : libexec
drwxr-xr-x.   root root       May  : local
dr-xr-xr-x.    root root      May   : sbin
drwxr-xr-x.  root root       May  : share
drwxr-xr-x.    root root       Jul    src
lrwxrwxrwx.    root root         Jul    tmp -> ../var/tmp
[root@itcast01 usr]# cd local/
[root@itcast01 local]# ll
total
drwxr-xr-x.   root  root   Sep    bin
drwxr-xr-x.   root  root   Sep    etc
drwxr-xr-x.   root  root   Sep    games
drwxr-xr-x.   users  May  : hadoop-2.4.
drwxr-xr-x.   root  root   Sep    include
drwxr-xr-x.   root  root   Sep    lib
drwxr-xr-x.   root  root   Sep    lib64
drwxr-xr-x.   root  root   Sep    libexec
drwxr-xr-x.   root  root   Sep    sbin
drwxr-xr-x.   root  root   Jul    share
drwxr-xr-x.   root  root   Sep    src
[root@itcast01 local]# cd hadoop-2.4./
[root@itcast01 hadoop-2.4.]# ll
total
drwxr-xr-x.   users   Jun    bin
drwxr-xr-x.   users   Jun    etc
drwxr-xr-x.   users   Jun    include
drwxr-xr-x.     games   Jun    lib
drwxr-xr-x.   users   Jun    libexec
-rw-r--r--.   users  Jun    LICENSE.txt
drwxr-xr-x.  root  root    May  : logs
-rw-r--r--.   users    Jun    NOTICE.txt
-rw-r--r--.   users   Jun    README.txt
drwxr-xr-x.   users   Jun    sbin
drwxr-xr-x.   users   Jun    share
drwxr-xr-x.  root  root    May  : tmp
[root@itcast01 hadoop-2.4.]# cd sbin/
[root@itcast01 sbin]# ll
total
-rwxr-xr-x.   users  Jun    distribute-exclude.sh
-rwxr-xr-x.   users  Jun    hadoop-daemon.sh
-rwxr-xr-x.   users  Jun    hadoop-daemons.sh
-rwxr-xr-x.   users  Jun    hdfs-config.cmd
-rwxr-xr-x.   users  Jun    hdfs-config.sh
-rwxr-xr-x.   users  Jun    httpfs.sh
-rwxr-xr-x.   users  Jun    mr-jobhistory-daemon.sh
-rwxr-xr-x.   users  Jun    refresh-namenodes.sh
-rwxr-xr-x.   users  Jun    slaves.sh
-rwxr-xr-x.   users  Jun    start-all.cmd
-rwxr-xr-x.   users  Jun    start-all.sh
-rwxr-xr-x.   users  Jun    start-balancer.sh
-rwxr-xr-x.   users  Jun    start-dfs.cmd
-rwxr-xr-x.   users  Jun    start-dfs.sh
-rwxr-xr-x.   users  Jun    start-secure-dns.sh
-rwxr-xr-x.   users  Jun    start-yarn.cmd
-rwxr-xr-x.   users  Jun    start-yarn.sh
-rwxr-xr-x.   users  Jun    stop-all.cmd
-rwxr-xr-x.   users  Jun    stop-all.sh
-rwxr-xr-x.   users  Jun    stop-balancer.sh
-rwxr-xr-x.   users  Jun    stop-dfs.cmd
-rwxr-xr-x.   users  Jun    stop-dfs.sh
-rwxr-xr-x.   users  Jun    stop-secure-dns.sh
-rwxr-xr-x.   users  Jun    stop-yarn.cmd
-rwxr-xr-x.   users  Jun    stop-yarn.sh
-rwxr-xr-x.   users  Jun    yarn-daemon.sh
-rwxr-xr-x.   users  Jun    yarn-daemons.sh
[root@itcast01 sbin]# start-dfs.sh
Starting namenodes on [itcast01]
root@itcast01's password:
root@itcast01's password: itcast01: Permission denied, please try again.

itcast01: starting namenode, logging to /usr/local/hadoop-2.4./logs/hadoop-root-namenode-itcast01.out
root@localhost's password:
root@localhost's password: localhost: Permission denied, please try again.

localhost: starting datanode, logging to /usr/local/hadoop-2.4./logs/hadoop-root-datanode-itcast01.out
Starting secondary namenodes [0.0.0.0]
root@0.0.0.0's password:
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop-2.4./logs/hadoop-root-secondarynamenode-itcast01.out
[root@itcast01 sbin]# jps
 DataNode
 NameNode
 SecondaryNameNode
 Jps
[root@itcast01 sbin]# start-yarn.sh
starting yarn daemons
starting resourcemanager, logging to /usr/local/hadoop-2.4./logs/yarn-root-resourcemanager-itcast01.out
root@localhost's password:
localhost: starting nodemanager, logging to /usr/local/hadoop-2.4./logs/yarn-root-nodemanager-itcast01.out
[root@itcast01 sbin]# jps
 NodeManager
 Jps
 DataNode
 NameNode
 ResourceManager
 SecondaryNameNode
[root@itcast01 sbin]#