centos8中怎么构建一个hadoop集群

centos8中怎么构建一个hadoop集群，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。

修改hosts vim /etc/hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.1.107 dsj2020master 192.168.1.108 dsj2020slave1 192.168.1.109 dsj2020slave2

更改 hostname. vim /etc/sysconfig/network

NETWORKING=yes HOSTNAME=master

配置静态IP. vim /etc/sysconfig/network-scripts/ifcfg-ethx

BOOTPROTO=static ONBOOT=yes IPADDR=192.168.1.101 NETMASK=255.255.255.0 GATEWAY=192.168.1.1

重启网络

nmcli c reload

java

wget https://repo.huaweicloud.com/java/jdk/8u201-b09/jdk-8u201-linux-x64.rpm

rpm -ivh jdk-8u201-linux-x64.rpm

hadoop

wget https://mirrors.tuna.tsinghua.edu.cn/apache/hadoop/common/hadoop-2.9.2/hadoop-2.9.2.tar.gz

tar -zxvf hadoop-2.9.2.tar.gz

mv hadoop-2.9.2.tar.gz hadoop

为hadoop添加环境变量

##########

export HADOOP_HOME=/home/user1/software/hadoop export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin

cd  /soft/hadoop/etc/hadoop/   --  编辑core-site.xml <configuration> <property> <name>fs.defaultFS</name> <value>hdfs://master:9000</value> </property> </configuration>   -- 编辑hdfs-site.xml <configuration>     <property>         <name>dfs.replication</name>         <value>3</value>     </property> </configuration>

--  编辑 slaves 文件 dsj2020master dsj2020slave1 dsj2020slave2   -- 复制 mapred-site.xml.template cp  mapred-site.xml.template  mapred-site.xml   --  编辑mapred-site.xml <configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> </configuration>   --  编辑yarn-site.xml  <configuration> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property> <property> <name>yarn.resourcemanager.resource-tracker.address</name> <value>master</value> </property> </configuration>  

将JAVA_HOME 环境变量加入hadoop-env.sh

JAVA_HOME=/soft/bin

复制过去

scp -r hadoop user2@slave1:~/software/

免密登陆

ssh-keygen -t rsa ssh-copy-id user@master ssh-copy-id user@slave1 ssh-copy-id user@slave2

JAVA_HOME=/root/jdk JRE_HOME=/root/jdk/jre CLASSPATH=.:$JAVA_HOME/lib:/dt.jar:$JAVA_HOME/lib/tools.jar PATH=$PATH:$JAVA_HOME/bin

server.1=dsj2020master:2888:3888 server.2=dsj2020slave1:2888:3888 server.3=dsj2020slave2:2888:3888

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