Download E-books Apache Oozie: The Workflow Scheduler for Hadoop PDF

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By Mohammad Kamrul Islam, Aravind Srinivasan

Get a superb grounding in Apache Oozie, the workflow scheduler method for handling Hadoop jobs. With this hands-on advisor, skilled Hadoop practitioners stroll you thru the intricacies of this strong and versatile platform, with various examples and real-world use cases.

Once you put up your Oozie server, you’ll dive into ideas for writing and coordinating workflows, and the way to write advanced facts pipelines. complicated subject matters enable you deal with shared libraries in Oozie, in addition to how you can enforce and deal with Oozie’s safeguard capabilities.

  • Install and configure an Oozie server, and get an outline of uncomplicated concepts
  • Journey throughout the international of writing and configuring workflows
  • Learn how the Oozie coordinator schedules and executes workflows in keeping with triggers
  • Understand how Oozie manages information dependencies
  • Use Oozie bundles to package deal numerous coordinator apps right into a information pipeline
  • Learn approximately security measures and shared library management
  • Implement customized extensions and write your individual EL capabilities and actions
  • Debug workflows and deal with Oozie’s operational details

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COM legitimate beginning Expires carrier valuable 09/17/14 00:03:04 09/18/14 00:03:04 krbtgt/EXAMPLE. COM@EXAMPLE. COM renew till 09/24/14 00:03:04 Configuring the Oozie server After effectively growing the keytab dossier and the valuable, we're now able to configure Oozie to aid Kerberos protection for all Hadoop companies. we have to upload the subsequent homes to the oozie-site. xml dossier: oozie. provider. HadoopAccessorService. kerberos. enabled true shows if Oozie is configured to exploit Kerberos. (Oozie to Hadoop) local. realm EXAMPLE. COM Kerberos Realm utilized by Oozie and Hadoop. utilizing 'local. realm' to be aligned with Hadoop configuration oozie. carrier. HadoopAccessorService. keytab. file /my/keytab/path/oozie. carrier. keytab place of the Oozie person keytab dossier. oozie. carrier. HadoopAccessorService. kerberos. principal oozie/fully. certified. area. name@EXAMPLE. COM Kerberos crucial for Oozie provider. After editing the configuration, you want to restart the Oozie server utilizing the instructions oozied. sh cease and oozied. sh commence . ensure the carrier is up and working. additionally, you could open the dossier logs/oozie. log and search for the next kind of log messages to verify that Oozie to Hadoop safety is configured safely: 2014-09-11 20:17:21,907 information HadoopAccessorService:539 - USER[-] GROUP[-] Oozie Kerberos Authentication [enabled] 2014-09-11 20:17:22,338 information HadoopAccessorService:539 - USER[-] GROUP[-] acquired Kerberos price ticket, keytab /my/keytab/path/oozie. carrier. keytab], Oozie imperative primary [oozie/fully. certified. area. name@EXAMPLE. COM]When the Oozie server is up, you could put up any Oozie workflow with a Hadoop motion to ensure that Oozie can publish jobs to a Kerberized Hadoop cluster. Oozie shopper to Server As we've seen within the earlier part, the Oozie server can act as a proxy for any consumer. which means Hadoop prone don't fee the user’s credentials if the task is submitted by means of the Oozie server. even supposing Hadoop prone execute the job/request because the finish consumer, they authenticate the Oozie provider user’s credential rather than the top consumer. for that reason it's very serious that the Oozie server authenticates any user’s request earlier than filing the request to Hadoop. you could configure the Oozie server to authenticate any Oozie client’s request. this fashion, Oozie exams the customer credentials purely in the course of activity submission. After the submission, Oozie doesn’t money the user’s credential for any recurrent or behind schedule scheduling of Hadoop jobs. either the Oozie server and the buyer have to take a few steps to aid this authentication. by way of default, Oozie helps Kerberos-based authentication among the customer and the server. in spite of the fact that, it isn't strange that a few businesses could desire their customized authentication over Kerberos.

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