Hadoop生态系统搭建(1)——Ubuntu16.04环境搭建 Hadoop 2.7.0 全分布式环境
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1. 系统环境
Ubuntu 16.04
vmware
hadoop 2.7.0
java 1.8.0_111
master:192.168.19.128
slave1:192.168.19.129
slave2:192.168.19.130
2. 部署步骤
2.1 Basic Requirements
1.、添加 hadoop 用户,并添加到 sudoers
sudo adduser hadoopsudo vim /etc/sudoers
添加如下:
# User privilege specificationroot ALL=(ALL:ALL) ALLhadoop ALL=(ALL:ALL) ALL
2、切换到 hadoop 用户:
su hadoop
3、修改 /etc/hostname 主机名为 master
sudo vim /etc/hostname
4、修改 /etc/hosts
127.0.0.1 localhost127.0.1.1 localhost.localdomain localhost# The following lines are desirable for IPv6 capable hosts::1 localhost ip6-localhost ip6-loopbackff02::1 ip6-allnodesff02::2 ip6-allrouters# hadoop nodes192.168.19.128 master192.168.19.129 slave1192.168.19.130 slave2
5、安装配置 java 环境
下载 jdk1.8 解压到 /usr/local 目录下(为了保证所有用户都能使用),修改 /etc/profile,并生效:
# set jdk classpathexport JAVA_HOME=/usr/local/jdk1.8.0_111export JRE_HOME=$JAVA_HOME/jreexport PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATHexport CLASSPATH=$CLASSPATH:.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
source /etc/profile
验证 jdk 是否安装配置成功
hadoop@master:~$ java -versionjava version "1.8.0_111"Java(TM) SE Runtime Environment (build 1.8.0_111-b14)Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)
6、安装 openssh-server
sudo apt-get install openssh-server
7、对于 slave1 和 slave2 可采用虚拟机 clone 的方法实现复制,复制主机后注意修改 /etc/hostname 为 slave1 和 slave2
8、配置 master 节点可通过 SSH 无密码访问 slave1 和 slave2 节点
ssh-keygen -t rsa cat .ssh/id_rsa.pub >> .ssh/authorized_keys
将生成的 authorized_keys 文件复制到 slave1 和 slave2 的 .ssh目录下
scp .ssh/authorized_keys hadoop@slave1:~/.sshscp .ssh/authorized_keys hadoop@slave2:~/.ssh
测试 master 节点无密码访问 slave1 和 slave2 节点:
ssh slave1ssh slave2
输出:
hadoop@master:~$ ssh slave1Welcome to Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-31-generic x86_64) * Documentation: https://help.ubuntu.com * Management: https://landscape.canonical.com * Support: https://ubuntu.com/advantageLast login: Mon Nov 28 03:30:36 2016 from 192.168.19.1hadoop@slave1:~$
2.2 Hadoop 2.7 Cluster Setup
1、hadoop 用户目录下解压下载的 hadoop-2.7.0.tar.gz
hadoop@master:~/software$ lltotal 205436drwxrwxr-x 4 hadoop hadoop 4096 Nov 28 02:52 ./drwxr-xr-x 6 hadoop hadoop 4096 Nov 28 03:58 ../drwxr-xr-x 11 hadoop hadoop 4096 Nov 28 04:14 hadoop-2.7.0/-rw-rw-r-- 1 hadoop hadoop 210343364 Apr 21 2015 hadoop-2.7.0.tar.gz
2、配置 hadoop 的环境变量
sudo vim /etc/profile
配置如下:
# set hadoop classpathexport HADOOP_HOME=/home/hadoop/software/hadoop-2.7.0export HADOOP_MAPRED_HOME=$HADOOP_HOMEexport HADOOP_COMMON_HOME=$HADOOP_HOMEexport HADOOP_HDFS_HOME=$HADOOP_HOMEexport YARN_HOME=$HADOOP_HOMEexport JAVA_LIBRARY_PATH=$HADOOP_HOME/lib/nativeexport HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoopexport YARN_CONF_DIR=$HADOOP_HOME/etc/hadoopexport HADOOP_PREFIX=$HADOOP_HOMEexport CLASSPATH=$CLASSPATH:.:$HADOOP_HOME/bin
3、配置 hadoop 的配置文件,主要配置 core-site.xml、hdfs-site.xml、mapred-site.xml、yarn-site.xml 文件。
- core-site.xml
<configuration> <property> <name>fs.defaultFS</name> <!-- master: /etc/hosts 配置的域名 master --> <value>hdfs://master:9000/</value> </property></configuration>
- hdfs-site.xml
<configuration> <property> <name>dfs.namenode.name.dir</name> <value>/home/hadoop/software/hadoop-2.7.0/dfs/namenode</value> </property> <property> <name>dfs.datanode.data.dir</name> <value>/home/hadoop/software/hadoop-2.7.0/dfs/datanode</value> </property> <property> <name>dfs.replication</name> <value>1</value> </property> <property> <name>dfs.namenode.secondary.http-address</name> <value>master:9001</value> </property></configuration>
- mapred-site.xml
<configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> <property> <name>mapreduce.jobhistory.address</name> <value>master:10020</value> </property> <property> <name>mapreduce.jobhistory.webapp.address</name> <value>master:19888</value> </property></configuration>
- yarn-site.xml
<configuration> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property> <property> <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name> <value>org.apache.hadoop.mapred.ShuffleHandler</value> </property> <property> <name>yarn.resourcemanager.address</name> <value>master:8032</value> </property> <property> <name>yarn.resourcemanager.scheduler.address</name> <value>master:8030</value> </property> <property> <name>yarn.resourcemanager.resource-tracker.address</name> <value>master:8031</value> </property> <property> <name>yarn.resourcemanager.admin.address</name> <value>master:8033</value> </property> <property> <name>yarn.resourcemanager.webapp.address</name> <value>master:8088</value> </property></configuration>
4、修改env环境变量文件,为 hadoop-env.sh、mapred-env.sh、yarn-env.sh 文件添加 JAVA_HOME:
# The java implementation to use.export JAVA_HOME=/usr/local/jdk1.8.0_111/
5、配置 slaves 文件
slave1slave2
6、 向 slave1 和 slave2 节点复制 hadoop2.7.0 整个目录至相同的位置
hadoop@master:~/software$ scp -r hadoop-2.7.0/ slave1:~/softwarehadoop@master:~/software$ scp -r hadoop-2.7.0/ slave2:~/software
2.3 Start Hadoop cluster from master
1、初始格式化文件系统 bin/hdfs namenode -format
hadoop@master:~/software/hadoop-2.7.0$ ./bin/hdfs namenode -format
输出 master/192.168.19.128 节点的 NameNode has been successfully formatted.
......16/11/28 05:10:56 INFO common.Storage: Storage directory /home/hadoop/software/hadoop-2.7.0/dfs/namenode has been successfully formatted.16/11/28 05:10:56 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 016/11/28 05:10:56 INFO util.ExitUtil: Exiting with status 016/11/28 05:10:56 INFO namenode.NameNode: SHUTDOWN_MSG: /************************************************************SHUTDOWN_MSG: Shutting down NameNode at master/192.168.19.128************************************************************/
启动 Hadoop 集群 start-all.sh
hadoop@master:~/software/hadoop-2.7.0$ ./sbin/start-all.sh This script is Deprecated. Instead use start-dfs.sh and start-yarn.shStarting namenodes on [master]master: starting namenode, logging to /home/hadoop/software/hadoop-2.7.0/logs/hadoop-hadoop-namenode-master.outslave2: starting datanode, logging to /home/hadoop/software/hadoop-2.7.0/logs/hadoop-hadoop-datanode-slave2.outslave1: starting datanode, logging to /home/hadoop/software/hadoop-2.7.0/logs/hadoop-hadoop-datanode-slave1.outStarting secondary namenodes [master]master: starting secondarynamenode, logging to /home/hadoop/software/hadoop-2.7.0/logs/hadoop-hadoop-secondarynamenode-master.outstarting yarn daemonsstarting resourcemanager, logging to /home/hadoop/software/hadoop-2.7.0/logs/yarn-hadoop-resourcemanager-master.outslave2: starting nodemanager, logging to /home/hadoop/software/hadoop-2.7.0/logs/yarn-hadoop-nodemanager-slave2.outslave1: starting nodemanager, logging to /home/hadoop/software/hadoop-2.7.0/logs/yarn-hadoop-nodemanager-slave1.out
jps 输出运行的 java 进程:
浏览器查看 HDFS:http://192.168.19.128:50070
浏览器查看 mapreduce:http://192.168.19.128:8088
注意:在 hdfs namenode -format
或 start-all.sh
运行 HDFS 或 Mapreduce 无法正常启动时(master节点或 slave 节点),可将 master 节点和 slave 节点目录下的 dfs、logs、tmp 等目录删除,重新 hdfs namenode -format
,再运行 start-all.sh
2.5 Stop Hadoop cluster from master
./sbin/stop-all.sh
hadoop@master:~/software/hadoop-2.7.0$ ./sbin/stop-all.sh This script is Deprecated. Instead use stop-dfs.sh and stop-yarn.shStopping namenodes on [master]master: stopping namenodeslave2: stopping datanodeslave1: stopping datanodeStopping secondary namenodes [master]master: stopping secondarynamenodestopping yarn daemonsstopping resourcemanagerslave2: stopping nodemanagerslave1: stopping nodemanagerno proxyserver to stop
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