准备三台虚拟机
hadoop1 hadoop2 hadoop3 ip分别为:192.168.56.211,192.168.56.212,192.168.56.213
配置三台虚拟机的主机名和映射
vi /etc/hosts 分别添加如下内容:
192.168.56.211 hadoop1
192.168.56.212 hadoop2
192.168.56.213 hadoop3
分别配置三台虚拟机的主机名为:hadoop1 hadoop2 hadoop3
vi /etc/hostname
添加主机名
三台机器上关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
三台机器上安装同步命令
yum install -y rsync
三台机器配置免密登录
分别在三台机器上执行:
a ssh-keygen -t rsa 按三次回车 ----生成ssh登录的公钥和私钥
b ssh-copy-hadoop1 输入对应机器的登录密码
ssh-copy-hadoop2 输入对应机器的登录密码
ssh-copy-hadoop3 输入对应机器的登录密码
创建命令目录
/myshell 用于存放jpsall、xsync、myhadoop命令脚本,并授权:
chmod 777 jpsall
chmod 777 xsync
chmod 777 myhadoop
jpsall脚本如下:
XML
#!/bin/bash
for host in hadoop1 hadoop2 hadoop3
do
echo ============$host============
ssh $host jps
done
xsync脚本如下:
XML
#!/bin/bash
if [ $# -lt 1 ]
then
echo Not Enough Arguement
exit;
fi
for host in hadoop1 hadoop2 hadoop3
do
echo ======$host=====
for file in $@
do
if [ -e $file ]
then
pdir=$(cd -P $(dirname $file); pwd)
fname=$(basename $file)
ssh $host "mkdir -p $pdir"
rsync -av $pdir/$fname $host:$pdir
else
echo $file does not exits!
fi
done
done
myhadoop脚本如下:
XML
#!/bin/bash
if [ $# -lt 1 ]
then
echo Not Enough Arguement
exit;
fi
case $1 in
"start")
echo "=========启动hadoop集群============="
echo "---------启动hdfs-------------------"
ssh hadoop1 "/soft/hadoop-3.3.1/sbin/start-dfs.sh"
echo "---------启动yarn-------------------"
ssh hadoop2 "/soft/hadoop-3.3.1/sbin/start-yarn.sh"
echo "---------启动hisotryserver----------"
ssh hadoop1 "/soft/hadoop-3.3.1/bin/mapred --daemon start historyserver"
;;
"stop")
echo "=========关闭hadoop集群============="
echo "---------关闭hisotryserver----------"
ssh hadoop1 "/soft/hadoop-3.3.1/bin/mapred --daemon stop historyserver"
echo "---------关闭yarn-------------------"
ssh hadoop2 "/soft/hadoop-3.3.1/sbin/stop-yarn.sh"
echo "---------关闭hdfs-------------------"
ssh hadoop1 "/soft/hadoop-3.3.1/sbin/stop-dfs.sh"
;;
*)
echo "input args error"
esac
上传jdk和hadoop压缩包,并解压缩
jdk-8u321-linux-x64.tar.gz
hadoop-3.3.1.tar.gz
配置环境变量
在/etc/profile.d目录下创建 myenv.sh
输入内容如下:
XML
export JAVA_HOME=/soft/jdk1.8.0_321
export PATH=$PATH:$JAVA_HOME/bin
export PATH=$PATH:/soft/hadoop-3.3.1/bin
export PATH=$PATH:/soft/hadoop-3.3.1/sbin
export PATH=$PATH:/mycmd/bin
其中路径根据实际情况填写
使配置立即生效
source /etc/profile
修改hadoop配置文件
配置文件目录:/soft/hadoop-3.3.1/etc/hadoop
core-site.xml配置文件在<configuration>中添加如下:
XML
<property>
<name>fs.defaultFS</name>
<value>hdfs://192.168.56.211:8020</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/soft/hadoop-3.3.1/data</value>
</property>
<property>
<name>hadoop.http.staticuser.user</name>
<value>root</value>
</property>
hdfs-site.xml配置文件在<configuration>中添加如下:
XML
<property>
<name>dfs.namenode.http-address</name>
<value>192.168.56.211:9870</value>
</property>
<property>
<name>dfs.namenode.secondary.http-address</name>
<value>192.168.56.213:9868</value>
</property>
yarn-site.xml配置文件在<configuration>中添加如下:
XML
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.resourcemanager.hostname</name>
<value>hadoop2</value>
</property>
<property>
<name>yarn.nodemanager.env-whitelist</name>
<value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREPEND_DISTCACHE,HADOOP_YARN_HOME,HADOOP_MAPRED_HOME</value>
</property>
<property>
<name>yarn.log-aggregation-enable</name>
<value>true</value>
</property>
<property>
<name>yarn.log.server.url</name>
<value>http://192.168.56.211:19888</value>
</property>
<property>
<name>yarn.log-aggregation.retain-seconds</name>
<value>640800</value>
</property>
mapred-site.xml配置文件在<configuration>中添加如下:
XML
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
<property>
<name>mapreduce.jobhistory.address</name>
<value>192.168.56.211:10020</value>
</property>
<property>
<name>mapreduce.jobhistory.webapp.address</name>
<value>192.168.56.211:19888</value>
</property>
修改workers文件内容为:注意前后不要有空格,不要有空行
hadoop1
hadoop2
hadoop3
修改启动命令(使用root用户启动时需要)
分别修改/soft/hadoop-3.3.1/bin目录下:
在文件最前方添加如下:
XML
HDFS_DATANODE_USER=root
HADOOP_SECURE_DN_USER=hdfs
HDFS_NAMENODE_USER=root
HDFS_SECONDARYNAMENODE_USER=root
在文件最前方添加如下:
XML
YARN_RESOURCEMANAGER_USER=root
HADOOP_SECURE_DN_USER=yarn
YARN_NODEMANAGER_USER=root
同步hadoop配置和环境配置到hadoop2、hadoop3
xsync /soft/hadoop-3.3.1/
xsync /soft/jdk1.8.0_321/
xsync /etc/profile.d/myenv.sh
xsync /myshell/
并分别到hadoop2、hadoop3上执行source /etc/profile
格式化hadoop(hadoop1上执行)
第一次启动时格式化,后续启动hadoop不要格式化
hdfs namenode -format
启动hadoop集群
myhadoop start --启动hadoop集群
查看集群启动情况
jspall
查看到类似如下内容表示启动成功
XML
============hadoop1============
19490 DataNode
19907 JobHistoryServer
20422 Jps
19773 NodeManager
19326 NameNode
============hadoop2============
15920 ResourceManager
15735 DataNode
16061 NodeManager
16861 Jps
============hadoop3============
13089 DataNode
13797 Jps
13270 NodeManager
13193 SecondaryNameNode