摘要：
Sqoop是一个开源工具，主要用于在Hadoop和传统数据库之间传输数据。它可以将数据从关系数据库导入Hadoop的HDFS，或将数据从HDFS导入关系数据库。
Sqoop(发音：skup)是一款开源的工具，主要用于在Hadoop(Hive)与传统的数据库间进行数据的传递，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。
官网：http://sqoop.apache.org/
由于官方不建议将sqoop 2用于生产环境，因为仍然使用sqoop 1
1、准备
下载
找到对应的镜像地址安装，复制下载地址
wget http://apache-mirror.8birdsvideo.com/sqoop/1.4.7/sqoop-1.4.7.bin__hadoop-2.6.0.tar.gz
解压
tar -zxvf sqoop-1.4.7.bin__hadoop-2.6.0.tar.gz
2、安装
mv sqoop-1.4.7.bin__hadoop-2.6.0 /usr/local/
添加jdbc到sqoop的lib中:
cp mysql-connector-java-5.1.17.jar /usr/local/sqoop-1.4.7.bin__hadoop-2.6.0/lib/
3、配置
配置sqoop，加入path
vim /etc/profile
export SQOOP_HOME=/usr/local/sqoop-1.4.7.bin__hadoop-2.6.0 export PATH=$SQOOP_HOME/bin:$PATH
配置sqoop-evn.sh
在sqoop的conf目录下
cp sqoop-env-template.sh sqoop-env.sh vim sqoop-env.sh
文件内容增加
export HADOOP_COMMON_HOME=/lib/hadoop
export HADOOP_MAPRED_HOME=/lib/hadoop-mapreduce
export HIVE_HOME=/search/hive
export HIVE_CONF_DIR=/search/hive/conf
4、测试
测试与mysql的连通性
sqoop list-databases --connect jdbc:mysql://${HOST}:3306/test?characterEncoding=UTF-8 --username ${username} --password '$PASSWORD' Warning: /usr/local/sqoop-1.4.7.bin__hadoop-2.6.0/../hcatalog does not exist! HCatalog jobs will fail. Please set $HCAT_HOME to the root of your HCatalog installation. Warning: /usr/local/sqoop-1.4.7.bin__hadoop-2.6.0/../accumulo does not exist! Accumulo imports will fail. Please set $ACCUMULO_HOME to the root of your Accumulo installation. 19/12/12 16:39:52 INFO sqoop.Sqoop: Running Sqoop version: 1.4.7 19/12/12 16:39:52 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead. 19/12/12 16:39:53 INFO manager.MySQLManager: Preparing to use a MySQL streaming resultset. information_schema test
测试从mysql中导入到hive中
sqoop import --connect jdbc:mysql://***:3306/test?characterEncoding=UTF-8 --username *** --password '***' --table testxxx -m 1 --warehouse-dir /user/teemo/hive/warehouse/lyj_temp.db --hive-database lyj_temp --hive-import --hive-table testxxx
运行结果:
进入hive，select 一下能看到结果
遇到得问题：
问题1
19/12/12 17:22:29 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-root/compile/5c81c7e9c9d08472a6c1a1a272e4eeb3/testxxx.jar Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/mapreduce/InputFormat at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) at java.net.URLClassLoader.access$100(URLClassLoader.java:74) at java.net.URLClassLoader$1.run(URLClassLoader.java:369) at java.net.URLClassLoader$1.run(URLClassLoader.java:363) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:362) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) at java.net.URLClassLoader.access$100(URLClassLoader.java:74) at java.net.URLClassLoader$1.run(URLClassLoader.java:369) at java.net.URLClassLoader$1.run(URLClassLoader.java:363) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:362) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) at java.net.URLClassLoader.access$100(URLClassLoader.java:74) at java.net.URLClassLoader$1.run(URLClassLoader.java:369) at java.net.URLClassLoader$1.run(URLClassLoader.java:363) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:362) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) at java.net.URLClassLoader.access$100(URLClassLoader.java:74) at java.net.URLClassLoader$1.run(URLClassLoader.java:369) at java.net.URLClassLoader$1.run(URLClassLoader.java:363) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:362) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.apache.sqoop.manager.ImportJobContext.<init>(ImportJobContext.java:51) at com.cloudera.sqoop.manager.ImportJobContext.<init>(ImportJobContext.java:33) at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:506) at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:628) at org.apache.sqoop.Sqoop.run(Sqoop.java:147) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243) at org.apache.sqoop.Sqoop.main(Sqoop.java:252) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.mapreduce.InputFormat at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 58 more
配置的HIVE_HOME这个变量有问题，应该是hadoop-mapreduce这个目录
问题2
19/12/12 17:59:34 ERROR tool.ImportTool: Import failed: java.io.IOException: java.lang.ClassNotFoundException: org.apache.hadoop.hive.conf.HiveConf at org.apache.sqoop.hive.HiveConfig.getHiveConf(HiveConfig.java:50) at org.apache.sqoop.hive.HiveImport.getHiveArgs(HiveImport.java:392) at org.apache.sqoop.hive.HiveImport.executeExternalHiveScript(HiveImport.java:379) at org.apache.sqoop.hive.HiveImport.executeScript(HiveImport.java:337) at org.apache.sqoop.hive.HiveImport.importTable(HiveImport.java:241) at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:537) at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:628) at org.apache.sqoop.Sqoop.run(Sqoop.java:147) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234) at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243) at org.apache.sqoop.Sqoop.main(Sqoop.java:252) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hive.conf.HiveConf at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at org.apache.sqoop.hive.HiveConfig.getHiveConf(HiveConfig.java:44) ... 12 more
将hive的lib里面的拷贝到sqoop的lib目录下
cp hive-exec-1.2.1.jar /usr/local/sqoop-1.4.7.bin__hadoop-2.6.0/lib/