4 hadoop安装

hadoop安装

 

1 安装java环境

tar -xf jdk-8u131-linux-x64.tar.gz -C /usr/local/

vi /etc/profile

export JAVA_HOME=/usr/local/jdk1.8.0_131

export CLASS_PATH=$JAVA_HOME/bin/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tool.jar

export PATH=${JAVA_HOME}/bin:$PATH

source /etc/profile

 

2 ssh互信，免密登录

192.168.1.84 vm1 namenode

192.168.1.85 vm2 datanode

192.168.1.86 vm3 datanode

创建hadoop用户：(namenode和datanode均需要)

useradd hadoop

passwd hadoop

 

在namenode上生成秘钥：

# su - hadoop

# ssh-keygen

在/home/hadoop/.ssh/目录下生成：id_rsa（私钥）和id_rsa.pub（公钥）

将公钥id_rsa.pub上传至各datanode节点上

 

在各datanode节点上：（复制namenode上的id_rsa.pub到authorized_keys）

# vi /home/hadoop/.ssh/authorized_keys

文件权限一定是600：

chmod 700 /home/hadoop/.ssh

chmod 600 /home/hadoop/.ssh/authorized_keys

 

3 安装hadoop

# su - hadoop

# cd /home/hadoop/

下载hadoop包：

https://archive.apache.org/dist/hadoop/common/

https://mirrors.cnnic.cn/apache/hadoop/common/

tar -xf hadoop-3.2.2.tar.gz

cd /home/hadoop/hadoop-3.2.2/etc/hadoop/

 

修改配置：

vi hadoop-env.sh

export export JAVA_HOME=/usr/local/jdk1.8.0_131

 

vi core-site.xml

fs.defaultFS

hdfs://192.168.1.84:50070

hadoop.tmp.dir

/home/hadoop/data/tmp

fs.checkpoint.period

3600

 

vi hdfs-site.xml

dfs.replication

2

dfs.namenode.name.dir

/home/hadoop/data

dfs.datanode.data.dir

/home/hadoop/data

dfs.namenode.secondary.http-address

192.168.1.84:9001

dfs.http.address

0.0.0.0:50070

 

vi mapred-site.xml

mapred.job.tracker.http.address

0.0.0.0:50030

mapred.task.tracker.http.address

0.0.0.0:50060

mapreduce.framework.name

yarn

 

mapreduce.application.classpath

/home/hadoop/hadoop-3.2.2/etc/hadoop,

/home/hadoop/hadoop-3.2.2/share/hadoop/common/*,

/home/hadoop/hadoop-3.2.2/share/hadoop/common/lib/*,

/home/hadoop/hadoop-3.2.2/share/hadoop/hdfs/*,

/home/hadoop/hadoop-3.2.2/share/hadoop/hdfs/lib/*,

/home/hadoop/hadoop-3.2.2/share/hadoop/mapreduce/*,

/home/hadoop/hadoop-3.2.2/share/hadoop/mapreduce/lib/*,

/home/hadoop/hadoop-3.2.2/share/hadoop/yarn/*,

/home/hadoop/hadoop-3.2.2/share/hadoop/yarn/lib/*

 

vi yar-site.xml

yarn.resourcemanager.hostname

vm1

 

yarn.nodemanager.aux-services

mapreduce_shuffle

 

vi /home/hadoop/hadoop-3.2.2/etc/hadoop/workers

vm2

vm3