Hadoop-2.6.0-cdh5.7.0安装步骤

1.下载Hadoop和JDK
   下载Hadoop地址：http://archive.cloudera.com/cdh5/cdh/5/hadoop-2.6.0-cdh5.7.0.tar.gz
   下载jdk：http://mvnrepository.com/artifact/mysql/mysql-connector-java/5.1.27

2.安装JDK
   2.1解压jdk压缩包  tar -zxvf /home/hadoop/software/jdk-7u80-linux-x64.tar.gz -C /usr/java
   2.2配置jdk环境变量
        vi /etc/profile
         export JAVA_HOME=/usr/java/jdk1.7.0_80
         export PATH=$JAVA_HOME/bin:$PATH
   2.3配置ssh
        ssh-keygen
        cp .ssh/id_rsa.pub ~/.ssh/authorized_keys

3.安装Hadoop
   3.1解压Hadoop
 tar -zxvf /home/hadoop/software/hadoop-2.6.0-cdh5.7.0.tar.gz -C /home/Hadoop/app/
   3.2配置环境
    vi .bash_profile
    export HADOOP_HOME=/home/hadoop/app/hadoop-2.6.0-cdh5.7.0
    export PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH
    source .bash_profile 

4.修改配置文件
    hadoop-env.sh
    export JAVA_HOME=/usr/java/jdk1.8.0_45

    core-site.xml
    <property>
        <name>fs.default.name</name>
        <value>hdfs://hadoop-01:9000</value>
    </property>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>/home/hadoop/app/tmp</value>
    </property>

    hdfs-site.xml
    <configuration>
    <property>
        <name>dfs.namenode.name.dir</name>
        <value>/home/hadoop/app/tmp/dfs/name</value>
    </property>
    <property>
        <name>dfs.datanode.data.dir</name>
        <value>/home/hadoop/app/tmp/dfs/data</value>
    </property>
    <property>
        <name>dfs.namenode.secondary.http-address</name>
        <value>hadoop-01:50090</value>
    </property>
    <property>
        <name>dfs.namenode.secondary.https-address</name>
        <value>hadoop-01:50091</value>
    </property>
    <property>
        <name>dfs.replication</name>
        <value>1</value>
    </property>
    </configuration>

    slaves
        echo  "ruozehadoop000" > ./etc/hadoop/slaves

    mapred-site.xml（正常情况下没有这个文件，可由 mapred-site.xml.template
    复制而来） cp mapred-site.xml.template   mapred-site.xml
    <configuration>
        <property>
                <name>mapreduce.framework.name</name>
                <value>yarn</value>
        </property>
    </configuration>

    yarn-site.xml：
    <configuration>
        <property>
                <name>yarn.nodemanager.aux-services</name>
                <value>mapreduce_shuffle</value>
        </property>
    </configuration>

    格式化Hadoop
       hdfs namenode -format

    启动Hadoop