大数据基础平台搭建-（二）Hadoop集群搭建

大数据基础平台搭建-（二）Hadoop集群搭建

大数据平台系列文章：
1、大数据基础平台搭建-（一）基础环境准备
2、大数据基础平台搭建-（二）Hadoop集群搭建

大数据平台是基于Apache Hadoop_3.3.4搭建的；

一、部署架构

二、在hnode1服务器上搭建Name_Node_Master

1、解压Hadoop

[root@hnode1 ~]# cd /opt/hadoop/
[root@hnode1 hadoop]# mkdir data
[root@hnode1 hadoop]# tar -xzvf hadoop-3.3.4.tar.gz 

2、配置HADOOP_HOME环境变量

[root@hnode1 hadoop]# vim /etc/profile
#Hadoop
export HADOOP_HOME=/opt/hadoop/hadoop-3.3.4
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin

[root@hnode1 hadoop]# source /etc/profile

3、配置Hadoop集群配置文件

配置文件所在的目录/opt/hadoop/hadoop-3.3.4/etc/hadoop/，所要编辑的配置文件如下表所示

序号	配置文件	说明
1	core-site.xml	配置Hadoop守护进程
2	hdfs-site.xml	配置HDFS的NameNode
3	yarn-site.xml	配置YARN的ResourceManager
4	mapred-site.xml	配置MapReduce应用
5	hadoop-env.sh	配置Hadoop环境变量
6	yarn-env.sh	配置Yarn环境变量
7	workers	配置Hadoop集群工作节点

1）. 配置hadoop守护进程

[root@hnode1 hadoop]# cd hadoop-3.3.4 
[root@hnode1 hadoop-3.3.4]# vim etc/hadoop/core-site.xml

<configuration>
    
    <property>
        <name>fs.defaultFSname>
        <value>hdfs://hnode1:8020value>
    property>
    
    <property>
        <name>io.file.buffer.sizename>
        <value>131072value>
    property>
    
    <property>
        <name>hadoop.tmp.dirname>
        <value>/opt/hadoop/datavalue>
    property>
    
    <property>
        <name>hadoop.http.staticuser.username>
        <value>rootvalue>
    property>
configuration>

2）. 配置NameNode

[root@hnode1 hadoop-3.3.4]# vim etc/hadoop/hdfs-site.xml

<configuration>
    
    <property>
        <name>dfs.namenode.http-addressname>
        <value>hnode1:9870value>
    property>

    
    <property>
        <name>dfs.namenode.secondary.http-addressname>
        <value>hnode2:9868value>
    property>
configuration>

3）. 配置YARN的ResourceManager

[root@hnode1 hadoop-3.3.4]# vim etc/hadoop/yarn-site.xml

<configuration>

    
    <property>
        <name>yarn.nodemanager.aux-servicesname>
        <value>mapreduce_shufflevalue>
    property>

    
    <property>
        <name>yarn.resourcemanager.hostnamename>
        <value>hnode1value>
    property>

    
    <property>
        <name>yarn.nodemanager.env-whitelistname>
        <value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREPEND_DISTCACHE,HADOOP_YARN_HOME,HADOOP_MAPRED_HOMEvalue>
    property>
 
    
    <property>
        <name>yarn.log-aggregation-enablename>
        <value>truevalue>
    property>

    
    <property>
        <name>yarn.log.server.urlname>
        <value>http://hnode2:19888/jobhistory/logsvalue>
    property>

    
    <property>
        <name>yarn.log-aggregation.retain-secondsname>
        <value>604800value>
    property>

configuration>

4）. 配置MapReduce应用

[root@hnode1 hadoop-3.3.4]# vim etc/hadoop/mapred-site.xml

<configuration>
    
    <property>
        <name>mapreduce.framework.namename>
       <value>yarnvalue>
    property>

    
    <property>
       <name>mapreduce.jobhistory.addressname>
       <value>hnode2:10020value>
    property>

    
    <property>
        <name>mapreduce.jobhistory.webapp.addressname>
        <value>hnode2:19888value>
    property>

configuration>

5）. 配置Hadoop环境变量

[root@hnode1 hadoop-3.3.4]# vim etc/hadoop/hadoop-env.sh

export JAVA_HOME=/usr/java/jdk1.8.0_271
export HDFS_NAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_SECONDARYNAMENODE_USER=root
export YARN_RESOURCEMANAGER_USER=root
export YARN_NODEMANAGER_USER=root

5）. 配置Yarn环境变量

[root@hnode1 hadoop-3.3.4]# vim etc/hadoop/yarn-env.sh

export JAVA_HOME=/usr/java/jdk1.8.0_271

6）. 配置Hadoop集群工作节点

[root@hnode1 hadoop-3.3.4]# vim etc/hadoop/works

hnode1
hnode2
hnode3
hnode4
hnode5

三、在hnode2服务器上搭建Name_Node_Secondary

1、复制Hadoop

[root@hnode2 ~]#cd /opt/hadoop/
[root@hnode2 hadoop]# mkdir data
[root@hnode2 hadoop]# scp -r hnode1:/opt/hadoop/hadoop-3.3.4/ ./ 

2、配置HADOOP_HOME环境变量

[root@hnode2 hadoop]# vim /etc/profile 
#Hadoop
export HADOOP_HOME=/opt/hadoop/hadoop-3.3.4
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
[root@hnode2 hadoop]# source /etc/profile 

四、在hnode3服务器上搭建DataNode

1、复制Hadoop

[root@hnode3 ~]#cd /opt/hadoop/
[root@hnode3 hadoop]# mkdir data
[root@hnode3 hadoop]# scp -r hnode1:/opt/hadoop/hadoop-3.3.4/ ./ 

2、配置HADOOP_HOME环境变量

[root@hnode3 hadoop]# vim /etc/profile 
#Hadoop
export HADOOP_HOME=/opt/hadoop/hadoop-3.3.4
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
[root@hnode3 hadoop]# source /etc/profile 

五、在hnode4服务器上搭建Name_Node_Secondary

1、复制Hadoop

[root@hnode4 ~]#cd /opt/hadoop/
[root@hnode4 hadoop]# mkdir data
[root@hnode4 hadoop]# scp -r hnode1:/opt/hadoop/hadoop-3.3.4/ ./

2、配置HADOOP_HOME环境变量

[root@hnode4 hadoop]# vim /etc/profile 
#Hadoop
export HADOOP_HOME=/opt/hadoop/hadoop-3.3.4
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
[root@hnode4 hadoop]# source /etc/profile 

六、在hnode5服务器上搭建Name_Node_Secondary

1、复制Hadoop

[root@hnode5 ~]#cd /opt/hadoop/
[root@hnode5 hadoop]# mkdir data
[root@hnode5 hadoop]# scp -r hnode1:/opt/hadoop/hadoop-3.3.4/ ./ 

2、配置HADOOP_HOME环境变量

[root@hnode5 hadoop]# vim /etc/profile 
#Hadoop
export HADOOP_HOME=/opt/hadoop/hadoop-3.3.4
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
[root@hnode5 hadoop]# source /etc/profile 

七、启动Hadoop集群(在hnode1服务器上操作)

1. 创建Hadoop启动停止脚本

shell脚本是引用 FlyingCodes的博文大数据平台搭建详细流程（二）Hadoop集群搭建的脚本

[root@hnode1 ~]#cd /opt/hadoop/
[root@hnode1 hadoop]# vim hadoop.sh

#!/bin/bash

if [ $# -lt 1 ]
then
    echo "缺少参数..."
    exit ;
fi

case $1 in
"start")
        echo " ===================| 启动 Hadoop集群 | ==================="
        echo " -------------------| 启动 HDFS      | ---------------"
        ssh hnode1 "/opt/hadoop/hadoop-3.3.4/sbin/start-dfs.sh"
        echo " -------------------| 启动 YARN      | ---------------"
        ssh hnode1 "/opt/hadoop/hadoop-3.3.4/sbin/start-yarn.sh"
        echo " -------------------| 启动 HistoryServer |---------------"
        ssh hnode2 "/opt/hadoop/hadoop-3.3.4/bin/mapred --daemon start historyserver"
;;
"stop")
        echo " ===================| 关闭 Hadoop集群 |==================="
        echo " -------------------| 关闭 HistoryServer |---------------"
        ssh hnode2 "/opt/hadoop/hadoop-3.3.4/bin/mapred --daemon stop historyserver"
        echo " -------------------| 关闭 YARN      | ---------------"
        ssh hnode1 "/opt/hadoop/hadoop-3.3.4/sbin/stop-yarn.sh"
        echo " -------------------| 关闭 HDFS      | ---------------"
        ssh hnode1 "/opt/hadoop/hadoop-3.3.4/sbin/stop-dfs.sh"
;;
*)
    echo "输入的参数错误..."
;;
esac

[root@hnode1 hadoop]# chmod +x ./hadoop.sh 

2. Hadoop集群初始化

[root@hnode1 hadoop]# start-dfs.sh
[root@hnode1 hadoop]# start-yarn.sh
[root@hnode1 hadoop]# hdfs namenode -format 
[root@hnode1 hadoop]# ./hadoop.sh stop

3. Hadoop集群启动

[root@hnode1 hadoop]# ./hadoop.sh start

八、确认Hadoop集群状态

1. 查看HDFS

http://hnode1:8088

2. 查看DataNode

http://hnode1:9870

3. 查看HistoryServer

http://hnode2:19888/jobhistory