参考http://sqoop.apache.org/docs/1.99.4/Installation.html
1.简介
sqoop2分为server和client两部分。server作为maprde的客户端，必须安装在hadoop集群上。client无需安装在hadoop集群上，任何机器均可。
2.安装server
server必须安装在hadoop结点上，namenode和datanode均可。测试是否安装交配置hadoop：
[root@node2 ~]# $HADOOP_PREFIX/bin/hdfs dfs -ls /Found 4 itemsdrwxr-xr-x - root supergroup 0 2016-02-25 18:44 /hbasedrwxr-xr-x - root supergroup 0 2015-12-31 12:22 /testdrwxrwxr-x - root supergroup 0 2015-12-31 21:30 /tmpdrwxr-xr-x - root supergroup 0 2015-12-31 20:50 /user
实际上server需要读取namenode和resourcemanager的配置信息，并不依赖这些服务。
1)修改
server/conf/catalina.properties 中hadoop的lib路径：
common.loader中加入
,/usr/local/hadoop-2.6.3/share/hadoop/common/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/common/lib/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/hdfs/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/hdfs/lib/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/mapreduce/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/mapreduce/lib/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/tools/lib/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/yarn/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/yarn/lib/*.jar,/usr/local/hadoop-2.6.3/share/hadoop/httpfs/tomcat/lib/*.jar
2)启动server
官网的文档已经过时，无法执行bin/sqoop2-server start这样的命令。执行：
bin/sqoop.sh server start
查看日志：
Caused by: org.apache.sqoop.common.SqoopException: MAPREDUCE_0002:Failure on submission engine initialization - Invalid Hadoop configuration
directory (not a directory or permission issues): /etc/hadoop/conf/
不知道哪个地方配置了/etc/hadoop/conf，根本没有这目录。百度一下：http://www.myexception.cn/database/1600202.html
修改为/usr/local/hadoop-2.6.3/etc/hadoop/
3.client
clinet无需要配置。把server所在机器的sqoop-1.99.3复制到其它机器上即可，然后执行
#bin/sqoop.sh client
sqoop:000> set server --host node1 --port 12000 --webApp sqoop即可连接server执行命令