hadoop集群搭建

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hadoop集群搭建

hadoop集群搭建

前期准备

### 虚拟机三台

主机名	ip	功用
hadoop-server01	192.168.3.101	namenode
hadoop-server02	192.168.3.102	datanode1
hadoop-server03	192.168.3.103	datanode2

- ### jdk及Hadoop软件准备
jdk-8u45-linux-x64.tar.gz
上传至hadoop目录下
/home/hadoop/env/jdk1.8.0_45

配置环境变量

#------------------------------------------
# set java environment
JAVA_HOME=/home/hadoop/env/jdk1.8.0_45
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar::$JAVA_HOME/lib/tools.jar
export JAVA_HOME  PATH   CLASSPATH

#------------------------------------------

hadoop压缩包下载

我们这里使用的是hadoop-2.8.0.tar.gz
上传至/home/hadoop/bigdata/hadoop/hadoop-2.8.0
- ### 免密登陆 ssh
1. su - hadoop
2. ssh-keygen
3. ssh-copy-id hadoop@hadoop-server01

[root@localhost ~]#  su - hadoop  
[hadoop@localhost ~]$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_rsa): /home/hadoop/.ssh/id_rsa
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/hadoop/.ssh/id_rsa.
Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
cd:ee:49:e7:51:f1:cc:74:97:d2:be:11:47:9c:4d:8a hadoop@localhost.localdomain
The key's randomart image is:
+--[ RSA 2048]----+
|               o=|
|             ..++|
|            E.o+=|
|         o    o*=|
|        S o   .o+|
|         .   .  o|
|          o o  . |
|         o + .   |
|          o .    |
+-----------------+
[hadoop@localhost ~]$ ssh-copy-id hadoop@hadoop-server01
The authenticity of host 'hadoop-server01 (192.168.3.101)' can't be established.
RSA key fingerprint is f2:6e:ce:2c:4b:bf:58:61:c1:c1:0d:d4:46:a4:f8:24.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'hadoop-server01,192.168.3.101' (RSA) to the list of known hosts.
hadoop@hadoop-server01's password: 
Now try logging into the machine, with "ssh 'hadoop@hadoop-server01'", and check in:

  .ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

[hadoop@localhost ~]$ ssh-copy-id hadoop@hadoop-server02
The authenticity of host 'hadoop-server02 (192.168.3.102)' can't be established.
RSA key fingerprint is f2:6e:ce:2c:4b:bf:58:61:c1:c1:0d:d4:46:a4:f8:24.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'hadoop-server02,192.168.3.102' (RSA) to the list of known hosts.
hadoop@hadoop-server02's password: 
Now try logging into the machine, with "ssh 'hadoop@hadoop-server02'", and check in:

  .ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

hadoop namenode 配置

### 用户环境变量的设置
/home/hadoop/

[hadoop@hadoop-server01 ~]$ vi .bashrc

# User specific aliases and functions
# .bashrc

# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi

# User specific aliases and funct
#------------------------------------------
# set java environment
JAVA_HOME=/home/hadoop/env/jdk1.8.0_45
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar::$JAVA_HOME/lib/tools.jar
export JAVA_HOME  PATH   CLASSPATH

#------------------------------------------
HADOOP_HOME=/home/hadoop/bigdata/hadoop/hadoop-2.8.0
PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH
export  HADOOP_HOME  PATH

### 关闭防火墙

service iptables stop

### 修改配置文件

core-site.xml

/home/hadoop/bigdata/hadoop/hadoop-2.8.0/etc/hadoop
[hadoop@hadoop-server01 hadoop]$ vi core-site.xml

<configuration>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://hadoop-server01:9000/</value>
        <description>namenode settings</description>
    </property>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>/home/hadoop/tmp/hadoop-${user.name}</value>
        <description> temp folder </description>
    </property>  
    <property>
        <name>hadoop.proxyuser.hadoop.hosts</name>
        <value>hadoop-server01,hadoop-server-02,hadoop-server-03</value>
        <description> its hive need </description>
    </property>
    <property>
        <name>hadoop.proxyuser.hadoop.groups</name>
        <value>hadoop</value>
        <description> its hive need </description>
    </property>
</configuration>

hdfs-site.xml

/home/hadoop/bigdata/hadoop/hadoop-2.8.0/etc/hadoop
[hadoop@hadoop-server01 hadoop]$ vi hdfs-site.xml

<configuration>  
    <property>  
        <name>dfs.namenode.http-address</name>  
        <value>hadoop-server01:50070</value>  
        <description> fetch NameNode images and edits.注意主机名称 </description>  
    </property>
    <property>  
        <name>dfs.namenode.secondary.http-address</name>  
        <value>hadoop-server01:50090</value>  
        <description> fetch SecondNameNode fsimage </description>  
    </property> 
    <property>
        <name>dfs.replication</name>
        <value>2</value>
        <description> replica count </description>
    </property>
    <property>  
        <name>dfs.namenode.name.dir</name>  
        <value>file:///home/hadoop/bigdata/hadoop/hadoop-2.8.0/hdfs/name</value>  
        <description> namenode </description>  
    </property>  
    <property>  
        <name>dfs.datanode.data.dir</name>
        <value>file:///home/hadoop/bigdata/hadoop/hadoop-2.8.0/hdfs/data</value>  
        <description> DataNode </description>  
    </property>  
    <property>  
        <name>dfs.namenode.checkpoint.dir</name>  
        <value>file:///home/hadoop/bigdata/hadoop/hadoop-2.8.0/hdfs/namesecondary</value>  
        <description>  check point </description>  
    </property> 
    <property>
        <name>dfs.webhdfs.enabled</name>
        <value>true</value>
    </property>
    <property>
        <name>dfs.stream-buffer-size</name>
        <value>131072</value>
        <description> buffer </description>
    </property> 
    <property>  
        <name>dfs.namenode.checkpoint.period</name>  
        <value>3600</value>  
        <description> duration </description>  
    </property> 
</configuration>

mapred-site.xml

/home/hadoop/bigdata/hadoop/hadoop-2.8.0/etc/hadoop
[hadoop@hadoop-server01 hadoop]$ cp mapred-site.xml.template mapred-site.xml
[hadoop@hadoop-server01 hadoop]$ vi mapred-site.xml

<configuration>  
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
        </property>
    <property>
        <name>mapreduce.jobtracker.address</name>
        <value>hdfs://hadoop-server01:9001</value>
    </property>
    <property>
        <name>mapreduce.jobhistory.address</name>
        <value>hadoop-server01:10020</value>
        <description>MapReduce JobHistory Server host:port, default port is 10020.</description>
    </property>
    <property>
        <name>mapreduce.jobhistory.webapp.address</name>
        <value>hadoop-server01:19888</value>
        <description>MapReduce JobHistory Server Web UI host:port, default port is 19888.</description>
    </property>
</configuration>

yarn-site.xml

/home/hadoop/bigdata/hadoop/hadoop-2.8.0/etc/hadoop
[hadoop@hadoop-server01 hadoop]$ vi yarn-site.xml

<configuration>
    <property>
        <name>yarn.resourcemanager.hostname</name>
        <value>hadoop-server01</value>
    </property>

    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>

    <property>
        <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
        <value>org.apache.hadoop.mapred.ShuffleHandler</value>
    </property>

    <property>
        <name>yarn.resourcemanager.address</name>
        <value>hadoop-server01:8032</value>
    </property>

    <property>
        <name>yarn.resourcemanager.scheduler.address</name>
        <value>hadoop-server01:8030</value>
    </property>

    <property>
        <name>yarn.resourcemanager.resource-tracker.address</name>
        <value>hadoop-server01e:8031</value>
    </property>

    <property>
        <name>yarn.resourcemanager.admin.address</name>
        <value>hadoop-server01:8033</value>
    </property>

    <property>
        <name>yarn.resourcemanager.webapp.address</name>
        <value>hadoop-server01:8088</value>
    </property>
</configuration>

slaves

    vi slaves
hadoop-server02
hadoop-server03

格式化NAMENODE

 hadoop namenode -format

启动hadoop集群

 start-all.sh