hadoop实战(一)

1.安装centos8

2.配置yum源

3.关闭防火墙

4.安装jdk

rpm -ivh jdk-8u101-linux-x64.rpm
vim /etc/profile
export JAVA_HOME=/usr/java/jdk1.8.0_131
export CLAsspATH=$:CLAsspATH:$JAVA_HOME/lib/
export PATH=$PATH:$JAVA_HOME/bin
source /etc/profile

5.安装hadoop

vim /etc/profile

export HADOOP_HOME=/usr/local/hadoop/hadoop-3.2.2
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin

source /etc/profile

6.hadoop集群模式

 7.查看官方文档

Apache Hadoop 3.3.1 – Hadoop: Setting up a Single Node Cluster.

8.常用命令

start-all.sh     --->start-dfs.sh + start-yarn.sh

start-dfs.sh   ---->hadoop-daemon.sh start namenode  + hadoop-daemons.sh start datanode

start-yarn.sh ----->yarn-daemon.sh start  resourcemanager + yarn-daemons.sh start nodemanager