Oozie的安装

查了一下Oozie翻译：驯象人，Hadoop得名来源于创始人Doug Cutting的孩子给一大象玩具取的名字，而oozie作为Hadoop上的工作流引擎，名字取得真的很贴切。
先获取oozie的版本，目前最新的是3.3.1.
http://mirror.bit.edu.cn/apache/oozie/3.3.1/
此版本需要自己build，需要先下载安装JDK, maven, hadoop, extjs libray 2.2.
我的环境:

Ubuntu
JDK 1.6.0_43
maven 3.0.7
Hadoop 1.0.4
extjs 2.2 (Oozie web-console需要）

1. Build：
./bin/mkdistro.sh -DskipTests
成功build后,会在目录里生成一个distribution.

hadoop安装时创建的hadoop组和hadoop用户对oozie目录是没有权限，所以最好一开始创建oozie组和oozie用户，同时赋予权限，不然会报错.偷懒用了root用户。新用户下记得export JAVA_HOME=<JDK安装路径>

2.安装oozie：

Create a libext/ directory in the directory where Oozie was expanded.

If using a version of Hadoop bundled in Oozie hadooplibs/ , copy the corresponding Hadoop JARs from hadooplibs/ to the libext/ directory. If using a different version of Hadoop, copy the required Hadoop JARs from such version in the libext/ directory.
If using the ExtJS library copy the ZIP file to the libext/ directory.

根据官方文档在distibution的目录下（/usr/local/oozie-3.3.1/distro/target/oozie-3.3.1-distro/oozie-3.3.1）创建libext，因为装的hadoop版本是1.0.4,所以拷贝$HADOOP_HOME/lib下的所有jar包到libext下，同时拷贝ext-2.2.zip到该目录下。
还要拷贝$HADOOP_HOME下的所有jar包到libext.

运行oozie-setup.sh创建oozie.war

cd /usr/local/oozie-3.3.1/distro/target/oozie-3.3.1-distro/oozie-3.3.1/bin
./oozie-setup.sh

成功运行后

New Oozie WAR file with added 'ExtJS library, JARs' at /usr/local/oozie-3.3.1/distro/target/oozie-3.3.1-distro/oozie-3.3.1/oozie-server/webapps/oozie.war

INFO: Oozie is ready to be started

拷贝oozie.war到tomcat部署目录下

root@ubuntu:/usr/local/oozie-3.3.1/webapp/src/main/webapp# cp /usr/local/oozie-3.3.1/distro/target/oozie-3.3.1-distro/oozie-3.3.1/oozie.war ./

修改配置oozie-site.xml,将false改成true.

vi /usr/local/oozie-3.3.1/distro/target/oozie-3.3.1-distro/oozie-3.3.1/conf/oozie-site.xml

<property>
        <name>oozie.service.JPAService.create.db.schema</name>
        <value> true</value>
        <description>
            Creates Oozie DB.

            If set to true, it creates the DB schema if it does not exist. If the DB schema exists is a NOP.
            If set to false, it does not create the DB schema. If the DB schema does not exist it fails start up.
        </description>
    </property>

创建Oozie DB

cd /usr/local/oozie-3.3.1/distro/target/oozie-3.3.1-distro/oozie-3.3.1/bin
./ooziedb.sh create -sqlfile oozie.sql -run

成功运行后

DONE
Check DB schema does not exist
DONE
Check OOZIE_SYS table does not exist
DONE
Create SQL schema
DONE
DONE
Create OOZIE_SYS table
DONE
Oozie DB has been created for Oozie version '3.3.1'

运行oozie

cd /usr/local/oozie-3.3.1/distro/target/oozie-3.3.1-distro/oozie-3.3.1/bin
./oozie-start.sh

用浏览器访问http://localhost:11000/oozie/就能看到oozie web console.

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