Sqoop2安装记录

我是採用的源代码编译的包安装的， 主要是考虑到会对部分功能做裁剪或增强， 详细源代码编译方式能够參考另外一篇博文《编译Sqoop2错误解决》。然后从dist/target文件夹下拷贝sqoop-1.99.3.tar.gz压缩包的内容到/usr/lib/sqoop文件夹中。

接下来便是開始对相关配置文件进行配置，注意sqoop2是区分了server和client端的，我们首先安装服务端，记得服务端须要安装到能够运行hadoop命令行的机器上。最直接的方式就是安装到hadoop集群某个节点上，而客户端能够在不论什么机器上，仅仅要能与sqoop server进行通信的机器即可。

1、服务端安装配置

进入/usr/lib/sqoop/server/conf文件夹，能够看到里面有几个配置文件， 有关于tomcat容器的还有sqoop本身的，首先我们配置catilina.properties，须要将hadoop的jar包依赖进来，当然，假设还须要导入hive或hbase，相应的jar包也须要照这样增加：

common.loader=${catalina.base}/lib,${catalina.base}/lib/*.jar,${catalina.home}/lib,${catalina.home}/lib/*.jar,${catalina.home}/../lib/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/common/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/common/lib/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/hdfs/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/hdfs/lib/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/mapreduce/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/mapreduce/lib/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/tools/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/tools/lib/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/yarn/*.jar,/home/cdh/hadoop-2.3.0-cdh5.1.2/share/hadoop/yarn/lib/*.jar

然后改动sqoop.properties。里面能够配置日志输出路径， 元数据内嵌数据库deby的信息等,须要注意的是改动deby库名为SQOOP。默认不是这个，而代码中却写死的这个，囧。 我们最主要改动下面位置：

<pre name="code" class="html"># JDBC repository provider configuration
org.apache.sqoop.repository.jdbc.handler=org.apache.sqoop.repository.derby.DerbyRepositoryHandler
org.apache.sqoop.repository.jdbc.transaction.isolation=READ_COMMITTED
org.apache.sqoop.repository.jdbc.maximum.connections=10
org.apache.sqoop.repository.jdbc.url=jdbc:derby:@BASEDIR@/repository/SQOOP;create=true
org.apache.sqoop.repository.jdbc.driver=org.apache.derby.jdbc.EmbeddedDriver
org.apache.sqoop.repository.jdbc.user=sa
org.apache.sqoop.repository.jdbc.password=

#
# Configuration for Mapreduce submission engine (applicable if it's configured)
#

# Hadoop configuration directory
org.apache.sqoop.submission.engine.mapreduce.configuration.directory=/home/cdh/hadoop/etc/hadoop/

另外配置临时不用怎么特殊配置，保持默认即可， 假设须要能够进一步特殊配置即可， 毕竟先玩起来是要事！

最后须要做的一件事情就是将mysql-connector-java-5.1.20.jar这个MySQL驱动放入/usr/lib/sqoop/server/lib文件夹下：

最后便是启动服务端(我是安装到192.168.69.16):

/usr/lib/sqoop/bin/sqoop.sh server start

而作为客户端不须要不论什么配置。直接将压缩分发包发送到对应机器上解压，运行 bin/sqoop.sh client就可以进入shell命令行界面，详细使用能够參考官方文档：

《Command Line Client》

遗留问题。 启动老是报一个错误，应该是日志jar冲突导致的，一直没搞定，假设有知道怎样处理的，能够一起交流哈：

log4j: Finished configuring.
log4j:ERROR A "org.apache.log4j.xml.DOMConfigurator" object is not assignable to a "org.apache.log4j.spi.Configurator" variable.
log4j:ERROR The class "org.apache.log4j.spi.Configurator" was loaded by
log4j:ERROR [org.apache.catalina.loader.StandardClassLoader@56606032] whereas object of type
log4j:ERROR "org.apache.log4j.xml.DOMConfigurator" was loaded by [WebappClassLoader^M
  context: /sqoop^M 
  delegate: false^M 
  repositories:^M
    /WEB-INF/classes/^M 
----------> Parent Classloader:^M
org.apache.catalina.loader.StandardClassLoader@56606032^M
].  
log4j:ERROR Could not instantiate configurator [org.apache.log4j.xml.DOMConfigurator].
log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
log4j:WARN Please initialize the log4j system properly.