sqoop安装

一 概述
sqoop是apache下一款“Hadoop和关系数据库服务器之间传送数据”的工具。
导入数据：Mysql、Oracle导入数据到hadoop的HDFS、Hive、HBase等数据存储系统。
导出数据：从Hadoop的文件系统中导出数据到关系数据库mysql等。
Sqoop的本质还是一个命令行工具，和HDFS、Hive相比，并没有什么高深的理论。



把数据从非hadoop导到hadoop系统叫导入。
把数据从hadoop导到非hadoop系统叫导出。

二 工作机制
将导入或导出命令翻译成mapreduce程序来实现。
在翻译出的mapreduce中主要是对inputformat和outputformat进行定制。

三 Sqoop安装
1 下载Sqoop

[root@centos opt]# wget http://archive.apache.org/dist/sqoop/1.4.6/sqoop-1.4.6.bin__hadoop-2.0.4-alpha.tar.gz[/code] 
2 安装Sqoop
[root@centos opt]# tar -zxvf sqoop-1.4.6.bin__hadoop-2.0.4-alpha.tar.gz
[root@centos opt]# mv sqoop-1.4.6.bin__hadoop-2.0.4-alpha sqoop-1.4.6


3 修改sqoop-env.sh
[root@centos conf]# vi sqoop-env.sh
[root@centos conf]# cat sqoop-env.sh
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0 #
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# included in all the hadoop scripts with source command
# should not be executable directly
# also should not be passed any arguments, since we need original $*
# Set Hadoop-specific environment variables here.
#Set path to where bin/hadoop is available
export HADOOP_COMMON_HOME=/opt/hadoop-2.7.4
#Set path to where hadoop-*-core.jar is available
xport HADOOP_MAPRED_HOME=/opt/hadoop-2.7.4
#set the path to where bin/hbase is available
export HBASE_HOME=/opt/hbase-1.2.6
#Set the path to where bin/hive is available
#export HIVE_HOME=
#Set the path for where zookeper config dir is
export ZOOCFGDIR=/opt/zookeeper-3.4.6/conf


4 配置环境变量etc/profile
export SQOOP_HOME=/opt/sqoop-1.4.6
export PATH=$PATH:$SQOOP_HOME/bin


四 上传mysql的驱动
[root@centos lib]# ll mysql-connector-java-5.1.30-bin.jar
-rw-r--r-- 1 root root 954041 Mar 11  2014 mysql-connector-java-5.1.30-bin.jar

五 简单测试
[root@centos lib]# sqoop help
/opt/sqoop-1.4.6/conf/sqoop-env.sh: line 26: xport: command not found
Warning: /opt/sqoop-1.4.6/../hcatalog does not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /opt/sqoop-1.4.6/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
Warning: /opt/sqoop-1.4.6/../zookeeper does not exist! Accumulo imports will fail.
Please set $ZOOKEEPER_HOME to the root of your Zookeeper installation.
18/01/01 11:52:08 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6
usage: sqoop COMMAND [ARGS]
Available commands:
codegen            Generate code to interact with database records
create-hive-table  Import a table definition into Hive
eval               Evaluate a SQL statement and display the results
export             Export an HDFS directory to a database table
help               List available commands
import             Import a table from a database to HDFS
import-all-tables  Import tables from a database to HDFS
import-mainframe   Import datasets from a mainframe server to HDFS
job                Work with saved jobs
list-databases     List available databases on a server
list-tables        List available tables in a database
merge              Merge results of incremental imports
metastore          Run a standalone Sqoop metastore
version            Display version information
See 'sqoop help COMMAND' for information on a specific command.
[root@centos lib]# sqoop version
/opt/sqoop-1.4.6/conf/sqoop-env.sh: line 26: xport: command not found
Warning: /opt/sqoop-1.4.6/../hcatalog does not exist! HCatalog jobs will fail.
Please set $HCAT_HOME to the root of your HCatalog installation.
Warning: /opt/sqoop-1.4.6/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
Warning: /opt/sqoop-1.4.6/../zookeeper does not exist! Accumulo imports will fail.
Please set $ZOOKEEPER_HOME to the root of your Zookeeper installation.
18/01/01 11:52:54 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6
Sqoop 1.4.6
git commit id c0c5a81723759fa575844a0a1eae8f510fa32c25
Compiled by root on Mon Apr 27 14:38:36 CST 2015


六 参考
https://chuanke.baidu.com/v7662331-230792-1635549.html