感谢@吴飚飚哥的细心指导，向飚哥精益求精的精神学习SQOOP：Apache基金会下一个开源产品，Hadoop家族的一个产品，关系型数据库与HDFS文件系统之间进行数据交换，
感谢@吴飚 飚哥的细心指导，向飚哥精益求精的精神学习
sqoop：apache基金会下一个开源产品，hadoop家族的一个产品，关系型数据库与hdfs文件系统之间进行数据交换，数据迁移的一个工具。
一、环境描述
Mysql版本：mysql-installer-community-5.5.27.1 32位
Mysql for Windows 7 32位：我把mysql数据库安装在了自己win7的笔记本上，这样的好处就是减少了虚拟机 master slave的开销和使用空间还可以多利用一台机器的资源，如果你的虚拟机资源很紧张的话也可以这样部署。
Linux ISO：CentOS-6.0-i386-bin-DVD.iso 32位
JDK version：”1.6.0_25-ea” for linux
Hadoop software version：hadoop-0.20.205.0.tar.gz for linux
Mysql version：mysql-installer-community-5.5.27.1 32位 for windows
sqoop version：sqoop-1.2.0-CDH3B4.tar.gz for linux
主机名
IP
节点名
备注
h1
192.168.2.102
master
namenode和jobtracker
h2
192.168.2.103
slave1
datanode和tasktracker
H4
192.168.2.105
slave2
datanode和tasktracker
MySQL部署在宿主环境中： 参考飚哥风靡版
二、下载软件安装包
帖子名：hadoop第十周cloudera版sqoop包和hadoop-core-jar包下载
帖子网址：?mod=viewthread&tid=36867&fromuid=303
欢迎大家下载使用
sqoop-1.2.0-CDH3B4.tar.gz 和 hadoop-core-jar包 mysql-connector-java-5.1.22-bin.jar 包 是我们这次用到的
三、把下载好的文件加载到linux并解压
下载
[grid@h1 ~]$ pwd
/home/grid/
-rwxrw-rw-. 1 grid hadoop 67339212 4月 12 2011 hadoop-0.20.2-CDH3B4.tar.gz
-rwxrw-rw-. 1 grid hadoop 832960 11月 19 16:06 mysql-connector-java-5.1.22-bin.jar
-rwxrw-rw-. 1 grid hadoop 1543137 4月 12 2011 sqoop-1.2.0-CDH3B4.tar.gz
解压包
[grid@h1 ~]$ tar -zxvf hadoop-0.20.2-CDH3B4.tar.gz
[grid@h1 ~]$ tar -zxvf sqoop-1.2.0-CDH3B4.tar.gz
[grid@h1 ~]$ pwd
/home/grid/
drwxr-xr-x. 15 grid hadoop 4096 2月 22 2011 hadoop-0.20.2-CDH3B4 解压后目录
-rwxrw-rw-. 1 grid hadoop 67339212 4月 12 2011 hadoop-0.20.2-CDH3B4.tar.gz
-rwxrw-rw-. 1 grid hadoop 832960 11月 19 16:06 mysql-connector-java-5.1.22-bin.jar
drwxr-xr-x. 11 grid hadoop 4096 2月 22 2011 sqoop-1.2.0-CDH3B4 解压后目录
-rwxrw-rw-. 1 grid hadoop 1543137 4月 12 2011 sqoop-1.2.0-CDH3B4.tar.gz
四、拷贝hadoop-core-0.20.2-CDH3B4.jar和mysql-connector-java-5.1.22-bin.jar到/home/grid/sqoop-1.2.0-CDH3B4/lib/目录下
[grid@h1 ~]$ cd hadoop-0.20.2-CDH3B4
[grid@h1 hadoop-0.20.2-CDH3B4]$ cp hadoop-core-0.20.2-CDH3B4.jar /home/grid/sqoop-1.2.0-CDH3B4/lib/
[grid@h1 grid]$ cp mysql-connector-java-5.1.22-bin.jar /home/grid/sqoop-1.2.0-CDH3B4/lib/
五、配置sqoop-1.2.0-CDH3B4/bin/configure-sqoop文件
[grid@h1 conf]$ cd ../bin
[grid@h1 bin]$ pwd
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/home/grid/sqoop-1.2.0-CDH3B4/bin
[grid@h1 bin]$ vim configure-sqoop
注释掉hbase和zookeeper检查（除非你准备使用HABASE等HADOOP上的组件）
# Check: If we can’t find our dependencies, give up here.
if [ ! -d “${HADOOP_HOME}” ]; then
echo “Error: $HADOOP_HOME does not exist!”
echo ‘Please set $HADOOP_HOME to the root of your Hadoop installation.’
exit 1
fi 只有红色需要修改
#if [ ! -d “${HBASE_HOME}” ]; then
#echo “Error: $HBASE_HOME does not exist!”
#echo ‘Please set $HBASE_HOME to the root of your HBase installation.’
#exit 1
#fi
#if [ ! -d “${ZOOKEEPER_HOME}” ]; then
# echo “Error: $ZOOKEEPER_HOME does not exist!”
# echo ‘Please set $ZOOKEEPER_HOME to the root of your ZooKeeper installation.’
# exit 1
#fi
六、配置所需环境变量
在哪里执行sqoop，就在哪台机器上设置一下
[grid@h1 grid]$ vim .bashrc 添加
export JAVA_HOME=/usr
export JRE_HOME=/usr/java/jdk1.6.0_25/jre
export PATH=/usr/java/jdk1.6.0_25/bin:/home/grid/hadoop-0.20.2/bin:/home/grid/pig-0.9.2/bin:$PATH
export CLASSPATH=./:/usr/java/jdk1.6.0_25/lib:/usr/java/jdk1.6.0_25/jre/lib
export PIG_CLASSPATH=/home/grid/hadoop-0.20.2/conf
export HIVE_HOME=/home/grid/hive-0.8.1
export HIVE_CONF_DIR=$HIVE_HOME/conf
export HADOOP_HOME=/home/grid/hadoop-0.20.2
作用：让sqoop程序从环境变量里找到hadoop的位置，从而找到hadoop配置文件，知道集群的部署情况
[grid@h1 grid]$ echo $HADOOP_HOME 检查一下没有问题
/home/grid/hadoop-0.20.2
七、配置启动HADOOP集群
H1机器 master
[grid@h1 bin]$ pwd
/home/grid/hadoop-0.20.2/bin
[grid@h1 bin]$ ./start-all.sh
starting namenode, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-namenode-h1.out
h2: starting datanode, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-datanode-h2.out
h4: starting datanode, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-datanode-h4.out
h1: starting secondarynamenode, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-secondarynamenode-h1.out
starting jobtracker, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-jobtracker-h1.out
h2: starting tasktracker, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-tasktracker-h2.out
h4: starting tasktracker, logging to /home/grid/hadoop-0.20.2/bin/../logs/hadoop-grid-tasktracker-h4.out
[grid@h1 bin]$ jps
17191 JobTracker
16955 NameNode
17442 Jps
17121 SecondaryNameNode
H2机器 slave
[grid@h2 ~]$ jps
32523 Jps
17188 TaskTracker
13727 HQuorumPeer
17077 DataNode
H4机器 slave
[grid@h4 ~]$ jps
27829 TaskTracker
26875 Jps
17119 DataNode
31083 Jps
11557 HQuorumPeer
[grid@h1 bin]$ ./hadoop dfsadmin –report 检查hadoop集群状态
Configured Capacity: 19865944064 (18.5 GB)
Present Capacity: 8741523456 (8.14 GB)
DFS Remaining: 8726482944 (8.13 GB)
DFS Used: 15040512 (14.34 MB)
DFS Used%: 0.17%
Under replicated blocks: 4
Blocks with corrupt replicas: 0
Missing blocks: 0
————————————————-
Datanodes available: 2 (2 total, 0 dead) –2个节点存活无shutdown
Name: 192.168.2.103:50010 — slaves h2
Decommission Status : Normal –状态正常
Configured Capacity: 9932972032 (9.25 GB)
DFS Used: 7520256 (7.17 MB)
Non DFS Used: 5447561216 (5.07 GB)
DFS Remaining: 4477890560(4.17 GB)
DFS Used%: 0.08%
DFS Remaining%: 45.08%
Last contact: Fri Dec 14 18:10:11 CST 2012
Name: 192.168.2.105:50010 — slaves h4
Decommission Status : Normal –状态正常
Configured Capacity: 9932972032 (9.25 GB)
DFS Used: 7520256 (7.17 MB)
Non DFS Used: 5676859392 (5.29 GB)
DFS Remaining: 4248592384(3.96 GB)
DFS Used%: 0.08%
DFS Remaining%: 42.77%
Last contact: Fri Dec 14 18:10:11 CST 2012
集群正常启动了
八、启动mysql，创建leo用户进行sqoop连接
1. 必须启动服务才能操作数据库
数据库端口：3306
Mysqll服务名：MySQL55
Mysql状态：已经启动
创建leo用户
grant all privileges on *.* to ‘leo’@’%’ identified by ‘leo’ with grant option;
select * from mysql.user;
flush privileges;
九、mysql 中建立sqoop库，网站空间，test表，添加数据
[grid@h1 bin]$ ping 192.168.2.110 检查linux for windows 的连接性
PING 192.168.2.110 (192.168.2.110) 56(84) bytes of data.
64 bytes from 192.168.2.110: icmp_seq=1 ttl=64 time=14.5 ms
64 bytes from 192.168.2.110: icmp_seq=2 ttl=64 time=3.43 ms
64 bytes from 192.168.2.110: icmp_seq=3 ttl=64 time=9.68 ms
64 bytes from 192.168.2.110: icmp_seq=4 ttl=64 time=0.549 ms
^C
— 192.168.2.110 ping statistics —
4 packets transmitted, 4 received, 0% packet loss, time 3630ms
rtt min/avg/max/mdev = 0.549/7.063/14.577/5.453 ms
[grid@h1 grid]$ mysql -h192.168.2.110 -uleo –pleo 使用leo用户登录数据库
命令列表
show databases; 显示当前有哪些数据库
create database sqoop; 创建sqoop数据库
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