Hadoop
Hadoop分布式集群
单机安装部署
购买云主机
| 主机 | IP地址 | 配置 |
|---|---|---|
| hadoop1 | 192.168.1.50 | 最低配置2核2G |
hadoop安装
拷贝云盘 public/hadoop/hadoop-2.7.7.tar.gz 到 hadoop1 上
[root@hadoop1 ~]# yum install -y java-1.8.0-openjdk java-1.8.0-openjdk-devel
[root@hadoop1 ~]# tar -zxf hadoop-2.7.7.tar.gz
[root@hadoop1 ~]# mv hadoop-2.7.7 /usr/local/hadoop
[root@hadoop1 ~]# chown -R 0.0 /usr/local/hadoop
配置JAVA运行环境
[root@hadoop1 ~]# vim /etc/hosts
192.168.1.50 hadoop1
[root@hadoop1 ~]# rpm -ql java-1.8.0-openjdk
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.292.b10-1.el7_9.x86_64/jre/bin/policytool
[root@hadoop1 ~]# vim /usr/local/hadoop/etc/hadoop/hadoop-env.sh
25: export JAVA_HOME="java-1.8.0-openjdk安装路径"
# 25: export JAVA_HOME="/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.292.b10-1.el7_9.x86_64/jre"
33: export HADOOP_CONF_DIR="/usr/local/hadoop/etc/hadoop"
[root@hadoop1 ~]# /usr/local/hadoop/bin/hadoop version
热点词汇分析
[root@hadoop1 ~]# cd /usr/local/hadoop
[root@hadoop1 hadoop]# mkdir input
[root@hadoop1 hadoop]# cp *.txt input/
[root@hadoop1 hadoop]# ./bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.7.jar wordcount ./input ./output
[root@hadoop1 hadoop]# cat ./output/*
[root@hadoop1 hadoop]# cat output/* | sort -n -k 2
集群安装部署
购买云主机
| 主机 | IP地址 | 配置 |
|---|---|---|
| hadoop1 | 192.168.1.50 | 最低配置2核2G |
| node-0001 | 192.168.1.51 | 最低配置2核2G |
| node-0002 | 192.168.1.52 | 最低配置2核2G |
| node-0003 | 192.168.1.53 | 最低配置2核2G |
HDFS架构图
graph TB
M1([hadoop1<br><font color=ff0000>NameNode<br>SecondaryNamenode</font>])
N1(node-0001<br><font color=ff0000>Datanode</font>)
N2(node-0002<br><font color=ff0000>Datanode</font>)
N3(node-0003<br><font color=ff0000>Datanode</font>)
M1 --> N1 & N2 & N3
HDFS部署
以下操作所有机器都要执行
[root@hadoop1 ~]# yum install -y java-1.8.0-openjdk java-1.8.0-openjdk-devel
[root@hadoop1 ~]# vim /etc/hosts
192.168.1.50 hadoop1
192.168.1.51 node-0001
192.168.1.52 node-0002
192.168.1.53 node-0003
以下操作仅在 hadoop1 上执行
[root@hadoop1 ~]# vim /etc/ssh/ssh_config
# 60行新添加
StrictHostKeyChecking no
[root@hadoop1 ~]# ssh-keygen -t rsa -b 2048 -N '' -f /root/.ssh/id_rsa
[root@hadoop1 ~]# for i in hadoop1 node-{0001..0003};do
ssh-copy-id -i /root/.ssh/id_rsa.pub ${i}
done
配置文件语法格式 -- 官方手册
<property>
<name></name>
<value></value>
</property>
1、配置 hadoop-env.sh 参考 配置JAVA运行环境 案例
2、配置slaves (<font color=ff0000>localhost</font> 必须删除)
[root@hadoop1 ~]# vim /usr/local/hadoop/etc/hadoop/slaves
node-0001
node-0002
node-0003
3、配置core-site.xml
[root@hadoop1 ~]# vim /usr/local/hadoop/etc/hadoop/core-site.xml
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://hadoop1:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/var/hadoop</value>
</property>
</configuration>
4、配置hdfs-site.xml
[root@hadoop1 ~]# vim /usr/local/hadoop/etc/hadoop/hdfs-site.xml
<configuration>
<property>
<name>dfs.namenode.http-address</name>
<value>hadoop1:50070</value>
</property>
<property>
<name>dfs.namenode.secondary.http-address</name>
<value>hadoop1:50090</value>
</property>
<property>
<name>dfs.replication</name>
<value>2</value>
</property>
</configuration>
5、启动集群 [以下操作仅在 hadoop1 上执行]
[root@hadoop1 ~]# for i in node-{0001..0003};do
rsync -aXSH --delete /usr/local/hadoop ${i}:/usr/local/
done
[root@hadoop1 ~]# mkdir /var/hadoop
[root@hadoop1 ~]# /usr/local/hadoop/bin/hdfs namenode -format
[root@hadoop1 ~]# /usr/local/hadoop/sbin/start-dfs.sh
6、验证集群配置
[root@hadoop1 ~]# for i in hadoop1 node-{0001..0003};do
echo ${i};
ssh ${i} jps;
echo -e "\n";
done
[root@hadoop1 ~]# /usr/local/hadoop/bin/hdfs dfsadmin -report
... ...
-------------------------------------------------
Live datanodes (3):
mapreduce部署
[root@hadoop1 ~]# cd /usr/local/hadoop/etc/hadoop/
[root@hadoop1 hadoop]# cp mapred-site.xml.template mapred-site.xml
[root@hadoop1 hadoop]# vim mapred-site.xml
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
</configuration>
YARN架构图
graph TB
M1([hadoop1<br><font color=0000ff>namenode<br>secondarynamenode</font><br><font color=ff0000>ResourceManager</font>])
N1(node-0001<br><font color=0000ff>DataNode</font><br><font color=ff0000>NodeManager</font>)
N2(node-0002<br><font color=0000ff>DataNode</font><br><font color=ff0000>NodeManager</font>)
N3(node-0003<br><font color=0000ff>DataNode</font><br><font color=ff0000>NodeManager</font>)
M1 --> N1 & N2 & N3
Yarn部署
[root@hadoop1 ~]# vim /usr/local/hadoop/etc/hadoop/yarn-site.xml
<configuration>
<property>
<name>yarn.resourcemanager.hostname</name>
<value>hadoop1</value>
</property>
<!-- Site specific YARN configuration properties -->
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
</configuration>
启动集群 [以下操作仅在 hadoop1 上执行]
[root@hadoop1 ~]# for i in node-{0001..0003};do
rsync -avXSH --delete /usr/local/hadoop/etc ${i}:/usr/local/hadoop/
done
[root@hadoop1 ~]# /usr/local/hadoop/sbin/start-yarn.sh
[root@hadoop1 ~]# jps
验证集群
[root@hadoop1 ~]# for i in hadoop1 node-{0001..0003};do
echo ${i};
ssh ${i} jps;
echo -e "\n";
done
[root@hadoop1 ~]# /usr/local/hadoop/bin/yarn node -list
Total Nodes:3
Node-Id Node-State Node-Http-Address Number-of-Running-Containers
node-0003:33212 RUNNING node-0003:8042 0
node-0001:40201 RUNNING node-0001:8042 0
node-0002:38830 RUNNING node-0002:8042 0
web页面访问
namenode: http://hadoop1:50070
secondarynamenode: http://hadoop1:50090
resourcemanager: http://hadoop1:8088/cluster
datanode: http://node-0001:50075
nodemanager: http://node-0001:8042/node
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