1 hadoop 在虚拟机上的安装与配置
下载地址 http://archive.cloudera.com/cdh5/cdh/5/
演示的下载包 http://archive.cloudera.com/cdh5/cdh/5/hadoop-2.6.0-cdh5.15.1.tar.gz
下载解压
环境centos7.6
安装jdk1.8
配置ssh无密码登陆
ssh -keygen -t rsa 一路回车
cd ~/.ssh 有id_rsa ，id_rsa.pub，known_hosts
cat id_rsa.pub >> authorized_keys
chomd 600 authorized_keys
vim /etc/hosts
设置 ip hadoop000
即 
vim /etc/profile
export JAVA_HOME=/usr/local/java/jdk/jdk1.8.0_11/
export JRE_HOME=/usr/local/java/jdk/jdk1.8.0_11//jre
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
#hadoop
export HADOOP_HOME=/work/hadoop/hadoop-2.6.0-cdh5.15.1/
export PATH=$PATH:HADOOP_HOME/bin:$HADOOP_HOME/bin
vim /work/hadoop/hadoop-2.6.0-cdh5.15.1/etc/hadoop/hdfs-site.xml
mkdir tmp
vim /work/hadoop/hadoop-2.6.0-cdh5.15.1/etc/hadoop/core-site.xml
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://hadoop000:8020</value>
</property>
</configuration>
vim /work/hadoop/hadoop-2.6.0-cdh5.15.1/etc/hadoop/hadoop-env.sh
vim /work/hadoop/hadoop-2.6.0-cdh5.15.1/etc/hadoop/slaves
/sbin/stop-all.sh #先停止hadoop相关进程
/bin/hdfs namenode -format #重新格式化文件系统，因为之前的文件系统被误删除
firewall-cmd --state 查看防火墙的运行状态
开启/关闭防火墙(重启服务器后又会重新关闭) [root@localhost HMK]# systemctl start/stop firewalld.service 设置防火墙开机自动启动 [root@localhost HMK]# systemctl enable firewalld.service
重启防火墙
[root@localhost HMK]# systemctl restart firewalld.service
访问
http://192.168.19.128:50070
原文：https://www.cnblogs.com/shufeiyang/p/13166980.html