超详细的Hadoop2配置详解

1. 集群环境
Master 192.168.2.100
Slave1 192.168.2.101
Slave2 192.168.2.102

2. 下载安装包
#Master
wget http://mirrors.shu.edu.cn/apache/hadoop/common/hadoop-2.8.4/hadoop-2.8.4.tar.gz
tar zxvf hadoop-2.8.4.tar.gz

3. 修改Hadoop配置文件
#Master
cd hadoop-2.8.4/etc/hadoop
vim hadoop-env.sh
export JAVA_HOME=/usr/local/src/jdk1.8.0_152

vim yarn-env.sh
export JAVA_HOME=/usr/local/src/jdk1.8.0_152

vim slaves
slave1
slave2

vim core-site.xml

        
                fs.defaultFS
                hdfs://master:9000
        
        
                hadoop.tmp.dir
                file:/usr/local/hadoop-2.8.4/tmp
        

vim hdfs-site.xml

        
                dfs.namenode.secondary.http-address
                master:9001
        
        
                dfs.namenode.name.dir
                file:/usr/local/hadoop-2.8.4/dfs/name
        
        
                dfs.datanode.data.dir
                file:/usr/local/hadoop-2.8.4/dfs/data
        
        
                dfs.repliction
                3
        

vim mapred-site.xml

        
                mapreduce.framework.name
                yarn
        

vim yarn-site.xml

        
                yarn.nodemanager.aux-services
                mapreduce_shuffle
        
        
                yarn.nodemanager.aux-services.mapreduce.shuffle.class
                org.apache.hadoop.mapred.ShuffleHandler
        
        
                yarn.resourcemanager.address
                master:8032
        
        
                yarn.resourcemanager.scheduler.address
                master:8030
        
        
                yarn.resourcemanager.resource-tracker.address
                master:8035
        
        
                yarn.resourcemanager.admin.address
                master:8033
        
        
                yarn.resourcemanager.webapp.address
                master:8088
        

#创建临时目录和文件目录
mkdir /usr/local/hadoop-2.8.4/tmp
mkdir -p /usr/local/hadoop-2.8.4/dfs/name
mkdir -p /usr/local/hadoop-2.8.4/dfs/data

4. 配置环境变量
#Master、Slave1、Slave2
vim ~/.bashrc
HADOOP_HOME=/usr/local/src/hadoop-2.8.2
export PATH=$PATH:$HADOOP_HOME/bin
#刷新环境变量
source ~/.bashrc

5. 拷贝安装包
#Master
scp -r /usr/local/src/hadoop-2.8.4 root@slave1:/usr/local/src/hadoop-2.8.4
scp -r /usr/local/src/hadoop-2.8.4 root@slave2:/usr/local/src/hadoop-2.8.4

6. 启动集群
#Master
#初始化Namenode
hadoop namenode -format

#启动集群
./sbin/start-all.sh

6. 集群状态
jps
#Master

#Slave1

#Slave2

7.监控网页
http://master:8088

8. 测试
   

9. 关闭集群
   ./sbin/hadoop stop-all.sh