1. hadoop环境搭建
1.1 伪分布式环境搭建
1.1.1 伪分布式环境搭建
1.1.2 伪分布式搭建结果
hdfs可视化界面： http://od001:50070/dfshealth.html#tab-overview
yarn可视化界面： http://od001:8088/cluster
历史服务器可视化界面：http://od001:19888/
secondarynamenode可视化界面： http://od001:50090/status.html
1.1.3 批量启动脚本
#!/bin/bash
echo "启动namenode"
hadoop-daemon.sh start namenode
echo "启动datanode"
hadoop-daemon.sh start datanode
echo "启动resourcemanager"
yarn-daemon.sh start resourcemanager
echo "启动nodemanager"
yarn-daemon.sh start nodemanager
echo "启动historyserver"
mr-jobhistory-daemon.sh start historyserver
echo "启动secondarynamenode"
hadoop-daemon.sh start secondarynamenode
1.1.4 批量停止脚本
#!/bin/bash
echo "停止namenode"
hadoop-daemon.sh stop namenode
echo "停止datanode"
hadoop-daemon.sh stop datanode
echo "停止resourcemanager"
yarn-daemon.sh stop resourcemanager
echo "停止nodemanager"
yarn-daemon.sh stop nodemanager
echo "停止historyserver"
mr-jobhistory-daemon.sh stop historyserver
echo "停止secondarynamenode"
hadoop-daemon.sh stop secondarynamenode
1.2 集群环境
1.2.1 集群环境搭建
1）克隆虚拟机
2） 使用root用户修改网卡信息
vi /etc/udev/rules.d/70-persistent-net.rules
vi /etc/sysconfig/network-scripts/ifcfg-eth0
1.2.2 资源规划
| od002 | od003 | od004 | |
| HDFS | |||
| NameNode | |||
| DataNode | DataNode | DataNode | |
| SecondaryNameNode | |||
| YARN | ResourceManger | ||
| NodeManager | NodeManager | NodeManager | |
| MapReduce | |||
| JobHistoryServer | |||
1.3.3 配置
hfds
hadoop-env.sh
core-site.xml
hdfs-site.xml
slaves
yarn
yarn-env.sh
yarn-site.xml
slaves
mapreduce
mapred-env.sh
mapred-site.xml
1.3.4 配置同步
1）在od002、od003、od004分别使用ssh-keygen -t rsa命令，生成公私钥文件
2）在每台服务器的.ssh目录，使用
ssh-copy-id od002
ssh-copy-id od003
ssh-copy-id od004
配置ssh无密码登录
3）使用scp命令，同步配置文件
scp -r ./hadoop-2.5.0-cdh5.3.6/etc/ od003:/opt/modules/hadoop-2.5.0-cdh5.3.6
scp -r ./hadoop-2.5.0-cdh5.3.6/etc/ od004:/opt/modules/hadoop-2.5.0-cdh5.3.6
1.3.5 启动命令
1）在od002上，执行start-dfs.sh命令
Starting namenodes on [od002]
od002: starting namenode, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/hadoop-od-namenode-od002.out
od004: starting datanode, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/hadoop-od-datanode-od004.out
od003: starting datanode, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/hadoop-od-datanode-od003.out
od002: starting datanode, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/hadoop-od-datanode-od002.out
Starting secondary namenodes [od004]
od004: starting secondarynamenode, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/hadoop-od-secondarynamenode-od004.out
2）在od003上，执行start-yarn.sh命令
starting yarn daemons
starting resourcemanager, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/yarn-od-resourcemanager-od003.out
od004: starting nodemanager, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/yarn-od-nodemanager-od004.out
od002: starting nodemanager, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/yarn-od-nodemanager-od002.out
od003: starting nodemanager, logging to /opt/modules/hadoop-2.5.0-cdh5.3.6/logs/yarn-od-nodemanager-od003.out
3）验证环境
yarn jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.5.0-cdh5.3.6.jar wordcount input output001
1.3.6 基准测试
1）基本测试：服务启动、是否可用、简单的应用
hdfs读写操作
2）
1.3.9 集群环境搭建结果
hdfs可视化界面： http://od002:50070/dfshealth.html#tab-overview
yarn可视化界面： http://od003:8088/cluster
历史服务器可视化界面：http://od002:19888/
secondarynamenode可视化界面： http://od004:50090/status.html