高可用Hadoop平台-Oozie工作流
1.概述
在开发Hadoop的相关应用使用,在业务不复杂,任务不多的情况下,我们可以直接使用Crontab去完成相关应用的调度。今天给大家介绍的是统一管理各种调度任务的系统,下面为今天分享的内容目录:
- 内容介绍
- Oozie Server
- 截图预览
下面开始今天的内容分享。
2.内容介绍
今天的内容不涉及Oozie的具体细节操作,它的工作流程在下一篇博客为大家详细介绍。今天主要给大家分享Oozie的作用,它的集成步骤等内容。
2.1 作用
Oozie它是一个开源的工作流调度系统,它可以管理逻辑复杂的多个Hadoop作业任务,按照指定的顺序将其进行协同工作。比如说,我们日常的工作场景:
- 收集数据到HDFS
- 编写MR去清洗数据,生成新的数据存放到指定的HDFS路径下
- 创建Hive表分区,并加载数据到对应的表分区
- 使用HQL进行业务指标统计,并将统计的结果输出到对应的Hive大表当中
- 对统计后的大表当中的数据进行数据导出共外界业务去调用使用
通过上述的日常工作流程,我们可以编写工作流系统,生成一个工作流实例,然后每天定时去运行实例即可。针对这样一种Hadoop的应用场景,Oozie能够简化我们的任务调度并执行。
2.2 基础环境
本次给大家分享的基础环境是:
Name | Value |
操作系统 | CentOS6.6 |
工作流 | Oozie4.2 |
Hadoop | 2.6 |
以上便是本篇博客需依赖的基础环境。另外还需要用到JDK,Maven,MySQL驱动文件等。
3.Oozie Server
Oozie Server能够为我们提供便捷的Job管理功能,可以通过其可视化界面去管理Job的运行状态,当然也支持构建复杂的Hadoop Job流程,各个Job之间的依赖关系可以通过工作流进行配置,由Oozie Server统一去执行。
3.1 依赖包准备
- Maven
下载安装Maven环境,命令如下所示:
wget http://mirrors.hust.edu.cn/apache/maven/maven-3/3.3.3/binaries/apache-maven-3.3.3-bin.tar.gz tar -zxvf apache-maven-3.3.3-bin.tar.gz
接着添加环境变量,如下所示:
export M2_HOME=/home/hadoop/maven-3.3.3 export PATH=$PATH:$ES_HOME/bin
然后输入一下命令使之立即生效:
. /etc/profile
最后,我们输入 mvn -version 命令,若能现实对应的Maven版本号,即表示Maven环境集成OK。
- MySQL
关于 MySQL 数据库的安装配置较为简单,这里就不多做赘述了。
- Tomcat
由于Oozie会用其Web容器,这里需要安装Tomcat Web服务器,可以到Apache的官网下载对应的安装包,这里不多做赘述。
- ExtJS工具包
在可视化会依赖该工具包,所以这里我们需要下载其工具,下载地址我们可以在Oozie的DG_QuickStart页面找到,如下图所示:
地址如下所示:
wget http://dev.sencha.com/deploy/ext-2.2.zip
- Oozie
这里我们可以在Oozie的官网下载其安装包,下载地址:
wget http://mirrors.cnnic.cn/apache/oozie/4.2.0/oozie-4.2.0.tar.gz
3.2 Oozie集成
在准备好环境后,接下来,我们去集成Oozie。首先,我们将下载的Oozie安装包进行解压,然后,使用Maven命令对其进行打包。操作命令如下所示:
# 解压 tar -zxvf oozie-4.2.0.tar.gz # 进入 cd oozie-4.2.0 # 打包 mvn clean package assembly:single -DskipTests
注意:这里需要对pom文件进行修改,将JDK、Hadoop、HBase、Hive等组件的版本号进行统一,与你使用的版本号一致即可。
成功后出现以下图所示:
生成的路径地址如下所示:
/home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0
此时,我们修改Oozie的环境变量,如下所示:
export OOZIE_HOME=/home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0 export PATH=$PATH:$OOZIE_HOME/bin
接着,我们在$OOZIE_HOME目录下创建一个文件夹用于存放ExtJS和Hadoop的JAR文件,这里我们将前面下载的ExtJS的压缩包和Hadoop的Share目录下的JAR文件拷贝到libext文件夹下即可。由于,我们使用了MySQL来存储Oozie的元数据,所以需要用到MySQL的驱动包,因而,我们需要将MySQL的驱动包拷贝到libext目录下。
在准备完这些后,下面我们开始安装,命令如下所示:
# 进入$OOZIE_HOME/bin目录 ./oozie-setup.sh prepare-war
生成以下信息,表示成功,内容如下所示:
[hadoop@nna bin]$ ./oozie-setup.sh prepare-war setting CATALINA_OPTS="$CATALINA_OPTS -Xmx1024m" INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/commons-configuration-1.6.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-auth-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-common-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-common-2.6.0-tests.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-hdfs-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-hdfs-2.6.0-tests.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-hdfs-nfs-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-client-app-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-client-common-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-client-core-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-client-hs-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-client-hs-plugins-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-client-jobclient-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-client-jobclient-2.6.0-tests.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-client-shuffle-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-mapreduce-examples-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-nfs-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-api-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-applications-distributedshell-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-applications-unmanaged-am-launcher-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-client-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-common-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-registry-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-server-applicationhistoryservice-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-server-common-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-server-nodemanager-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-server-resourcemanager-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-server-tests-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/hadoop-yarn-server-web-proxy-2.6.0.jar INFO: Adding extension: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/libext/mysql-connector-java-5.1.32-bin.jar New Oozie WAR file with added 'ExtJS library, JARs' at /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server/webapps/oozie.war INFO: Oozie is ready to be started
若失败,可根据提示做对应的处理。
这样,我们在/home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server/webapps目录下就生成了oozie.war文件。
3.3 配置Oozie
我们在$OOZIE_HOME/conf目录下修改oozie-site.xml文件,内容如下所示:
<property> <name>oozie.service.JPAService.jdbc.driver</name> <value>com.mysql.jdbc.Driver</value> <description>JDBC driver class. </description> </property> <property> <name>oozie.service.JPAService.jdbc.url</name> <value>jdbc:mysql://nna:3306/oozie</value> <description>JDBC URL.</description> </property> <property> <name>oozie.service.JPAService.jdbc.username</name> <value>root</value> <description>DB user name.</description> </property> <property> <name>oozie.service.JPAService.jdbc.password</name> <value>root</value> <description>DB user password.</description>
</property>
这里我们使用手动去创建数据库,oozie.service.JPAService.create.db.schema若为true属性,即表示去自动创建。手动创建脚本如下所示:
CREATE DATABASE oozie; GRANT ALL ON oozie.* TO 'root'@'nna' IDENTIFIED BY 'root'; FLUSH PRIVILEGES;
然后,我们使用以下命令,生成数据表:
#在$OOZIE_HOME/bin目录下操作 ./ooziedb.sh create -sqlfile oozie.sql -run
生成以下内容:
[hadoop@nna bin]$ ./ooziedb.sh create -sqlfile oozie.sql -run setting CATALINA_OPTS="$CATALINA_OPTS -Xmx1024m" Validate DB Connection DONE DB schema does not exist Check OOZIE_SYS table does not exist DONE Create SQL schema DONE Create OOZIE_SYS table DONE Oozie DB has been created for Oozie version '4.2.0' The SQL commands have been written to: oozie.sql
若执行正常,会生成oozie.sql的脚本,如下图所示:
3.4 启动
接下来,我们去启动Oozie,命令如下所示:
# 在$OOZIE_HOME/bin目录下 ./oozie-start.sh
正常启动内容如下所示:
[hadoop@nna bin]$ ./oozie-start.sh WARN: Use of this script is deprecated; use 'oozied.sh start' instead Setting OOZIE_HOME: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0 Setting OOZIE_CONFIG: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/conf Sourcing: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/conf/oozie-env.sh setting CATALINA_OPTS="$CATALINA_OPTS -Xmx1024m" Setting OOZIE_CONFIG_FILE: oozie-site.xml Setting OOZIE_DATA: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/data Setting OOZIE_LOG: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/logs Setting OOZIE_LOG4J_FILE: oozie-log4j.properties Setting OOZIE_LOG4J_RELOAD: 10 Setting OOZIE_HTTP_HOSTNAME: nna Setting OOZIE_HTTP_PORT: 11000 Setting OOZIE_ADMIN_PORT: 11001 Setting OOZIE_HTTPS_PORT: 11443 Setting OOZIE_BASE_URL: http://nna:11000/oozie Setting CATALINA_BASE: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server Setting OOZIE_HTTPS_KEYSTORE_FILE: /home/hadoop/.keystore Setting OOZIE_HTTPS_KEYSTORE_PASS: password Setting OOZIE_INSTANCE_ID: nna Setting CATALINA_OUT: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/logs/catalina.out Setting CATALINA_PID: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server/temp/oozie.pid Using CATALINA_OPTS: -Xmx1024m -Dderby.stream.error.file=/home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/logs/derby.log Adding to CATALINA_OPTS: -Doozie.home.dir=/home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0 -Doozie.config.dir=/home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/conf -Doozie.log.dir=/home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/logs -Doozie.data.dir=/home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/data -Doozie.instance.id=nna -Doozie.config.file=oozie-site.xml -Doozie.log4j.file=oozie-log4j.properties -Doozie.log4j.reload=10 -Doozie.http.hostname=nna -Doozie.admin.port=11001 -Doozie.http.port=11000 -Doozie.https.port=11443 -Doozie.base.url=http://nna:11000/oozie -Doozie.https.keystore.file=/home/hadoop/.keystore -Doozie.https.keystore.pass=password -Djava.library.path= Setting up oozie DB setting CATALINA_OPTS="$CATALINA_OPTS -Xmx1024m" Validate DB Connection DONE DB schema exists The SQL commands have been written to: /tmp/ooziedb-9100396876446618885.sql Using CATALINA_BASE: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server Using CATALINA_HOME: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server Using CATALINA_TMPDIR: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server/temp Using JRE_HOME: /usr/java/jdk1.7 Using CLASSPATH: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server/bin/bootstrap.jar Using CATALINA_PID: /home/hadoop/oozie-4.2.0/distro/target/oozie-4.2.0-distro/oozie-4.2.0/oozie-server/temp/oozie.pid
4.截图预览
然后,我们可以输入浏览地址,查看是否启动正常,如下图所示:
5.总结
关于Oozie的集成,会有点繁琐,本篇博客只是针对单独的Oozie去集成,后续博客会给大家介绍Oozie集成到Hadoop集群,以及相关工作流的用法介绍等。
6.结束语
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