sqoop
Sqoop安装过程
Sqoop是一个用来将Hadoop和关系型数据库中的数据相互转移的工具,可以将一个关系型数据库(例如 : MySQL ,Oracle ,Postgres等)中的数据导进到Hadoop的HDFS中,也可以将HDFS的数据导进到关系型数据库中。
已经安装Hadoop-0.20.2,因sqoop官方版本不支持此版本,但可使用CDH3版本:
Sqoop CDH版本:http://archive.cloudera.com/cdh/3/sqoop-1.2.0-CDH3B4.tar.gz
Hadoop CDH版本:http://archive.cloudera.com/cdh/3/hadoop-0.20.2-CDH3B4.tar.gz
可以通过拷贝相应的包到sqoop-1.2.0-CDH3B4/lib下,依然可以使用Hadoop-0.20.2版本。
sqoop版本: sqoop-1.2.0-CDH3B4
Hadoop版本:0.20.2
mysql版本: 5.6.11
1)解压缩sqoop安装文件
[hadoop@node01 ~]$ tar -xzvf sqoop-1.2.0-CDH3B4.tar.gz
2)sqoop-1.2.0-CDH3B4依赖hadoop-core-0.20.2-CDH3B4.jar,所以你需要下载hadoop- 0.20.2-CDH3B4.tar.gz,解压缩后将hadoop-0.20.2-CDH3B4/hadoop-core-0.20.2- CDH3B4.jar复制到sqoop-1.2.0-CDH3B4/lib中。
[hadoop@node01 ~]$ cp hadoop-core-0.20.2-CDH3B4.jar sqoop-1.2.0-CDH3B4/lib
[hadoop@node01 ~]$ ls -l sqoop-1.2.0-CDH3B4/lib/hadoop-core-0.20.2-CDH3B4.jar
-rw-r--r--. 1 hadoop root 3452461 May 9 05:40 sqoop-1.2.0-CDH3B4/lib/hadoop-core-0.20.2-CDH3B4.jar
3)另外,sqoop导入mysql数据运行过程中依赖mysql-connector-java-*.jar,所以你需要下载mysql-connector-java-*.jar并复制到sqoop-1.2.0-CDH3B4/lib中
[hadoop@node01 ~]$ cp mysql-connector-java-5.1.24-bin.jar sqoop-1.2.0-CDH3B4/lib
[hadoop@node01 ~]$ ls -l sqoop-1.2.0-CDH3B4/lib/mysql-connector-java-5.1.24-bin.jar
-rw-r--r--. 1 hadoop root 846263 May 9 05:43 sqoop-1.2.0-CDH3B4/lib/mysql-connector-java-5.1.24-bin.jar
4)修改SQOOP的文件configure-sqoop,注释掉hbase和zookeeper检查(除非你准备使用HABASE等HADOOP上的组件),否则在进行hbase和zookeeper检查时,可能会卡在这里。
5)启动Hadoop
[hadoop@node01 bin]$ start-all.sh
[hadoop@node01 bin]$ jps
2732 Jps
2478 NameNode
2665 JobTracker
2600 SecondaryNameNode
6)从MySQL导入数据到HDFS
(1)在MySQL里创建测试数据库sqooptest
[hadoop@node01 ~]$ mysql -u root -p
mysql> create database sqooptest;
Query OK, 1 row affected (0.01 sec)
(2)创建sqoop专有用户
mysql> create user 'sqoop' identified by 'sqoop';
Query OK, 0 rows affected (0.00 sec)
mysql> grant all privileges on *.* to 'sqoop' with grant option;
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
(3)生成测试数据
mysql> use sqooptest;
Database changed
mysql> create table tb1 as select table_schema,table_name,table_type from information_schema.TABLES;
Query OK, 154 rows affected (0.28 sec)
Records: 154 Duplicates: 0 Warnings: 0
(4)测试sqoop与mysql的连接
[hadoop@node01 ~]$ sqoop list-databases --connect jdbc:mysql://node01:3306/ --username sqoop --password sqoop
(5)从MySQL导入数据到HDFS
[hadoop@node01 ~]$ sqoop import --connect jdbc:mysql://node01:3306/sqooptest --username sqoop --password sqoop --table tb1 -m 1
(6)在HDFS上查看刚刚导入的数据
[hadoop@node01 ~]$ hadoop dfs -ls tb1