Breathing New Life into Apache Oozie with Apache Ambari Workflow Manager
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The document discusses Apache Ambari Workflow Manager, a new Ambari View that provides a graphical user interface for visually designing and executing Apache Oozie workflows. It allows users to build workflows without having to write XML definitions. The Workflow Manager integrates with the Ambari file browser and dashboard to manage Oozie jobs. Examples shown include using workflows to perform HBase administrative tasks like table creation and compactions. The presentation concludes with information on Oozie and Ambari resources for learning more.
![© 2018 Bloomberg Finance L.P. All rights reserved.
HBase – Setup
Oozie needs HBase Configuration:
• Oozie Server Code (to support HBase delegation tokens)
— In libexec (see Server JARs list)
— In oozie-site.xml
<name>oozie.credentials.credentialclasses</name>
<value>hbase=org.apache.oozie.action.hadoop.HbaseCredentials,…</value>
</name>
• Client Workflow Code:
— Add to workflow.xml:
<credentials>
<credential name=”myhbase_creds” type=”hbase”>
[…]
</credential>
</credentials>
— All your normal HBase security settings in the credential section
• Server JARs:
(Copy the following to Oozie’s libexec)
— hbase-common.jar
— hbase-client.jar
— hbase-server.jar
— hbase-protocol.jar
— hbase-hadoop2-compat.jar](https://image.slidesharecdn.com/breathingnewlifeintooozieartemandclay-wdemo2-180723194212/85/Breathing-New-Life-into-Apache-Oozie-with-Apache-Ambari-Workflow-Manager-23-320.jpg)
![© 2018 Bloomberg Finance L.P. All rights reserved.
HBase – Compactions
HBASE-19528: Major Compaction Tool
• Automatically scales compaction to selected number of servers
• Requires read ability to /hbase
usage: MajorCompactor [-cf <arg>] [-dryRun] -servers <arg> -table <arg>
[...]
Usage instructions
-cf <arg> column families: comma separated eg: a,b,c
-dryRun Dry run, will just output a list of regions that
require compaction based on parameters passed
-minModTime <arg> Compact if store files have
modification time < minModTime
-servers <arg> Concurrent servers compacting
-table <arg> table name
...](https://image.slidesharecdn.com/breathingnewlifeintooozieartemandclay-wdemo2-180723194212/85/Breathing-New-Life-into-Apache-Oozie-with-Apache-Ambari-Workflow-Manager-25-320.jpg)
Breathing New Life into Apache Oozie with Apache Ambari Workflow Manager
- 1. © 2018 Bloomberg Finance L.P. All rights reserved. DataWorks Summit San Jose 2018 June 20, 2018 Artem Ervits – Hortonworks Clay Baenziger – Bloomberg Breathing New Life into Apache Oozie with Apache Ambari Workflow Manager
- 2. © 2018 Bloomberg Finance L.P. All rights reserved. Poll: • Who here uses Oozie? — In production? With kerberos? — Do you use HUE with Oozie? — How many workflows have you in production? 1-10? 10-50? 50+? — How many actions does the largest workflow contain? 1-10? 10-50? 50+? — Do you use Oozie with (or want to)? HBase? Spark? Python? Deployment Automation? • Do you like XML? — Do you have a favorite editor for Oozie workflows?
- 3. © 2018 Bloomberg Finance L.P. All rights reserved. Open Source Workflow Managers • Apache Airflow (Incubating) • Luigi by Spotify • Azkaban by LinkedIn • (And of course) Apache Oozie
- 4. © 2018 Bloomberg Finance L.P. All rights reserved. Introduction to Oozie • Oozie is a workflow scheduler system to manage Apache Hadoop jobs. • Oozie workflow jobs are Directed Acyclic Graphs (DAGs) of actions. • Oozie coordinator jobs are recurrent Oozie workflow jobs triggered by time and data availability. • Oozie is integrated with the rest of the Hadoop stack supporting several types of Hadoop jobs as well as system specific jobs out of the box. • Oozie is a scalable, reliable and extensible system. - Paraphrased from http://oozie.apache.org Actions: • Map/Reduce • Hive • Pig • HDFS • Java • Shell • Spark • Sub-Workflow • E-Mail • Decision • Fork • Join
- 5. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie Release Timeline • 1.x released in 2010. Yahoo! project with two GitHub releases. Added support for workflow jobs. • 2.x released in 2011. Still with Yahoo! with nine GitHub releases. Added support for coordinator jobs. • 3.x released in 2013. Project under Apache. Added support for bundle jobs and HBase credentials. • 4.x released in 2014. Added support for Hive/HCatalog, Spark integration and Oozie server high availability. • 5.0 released April 2018. Removes support for Hadoop 1, adds support for Hadoop 3, YARN AM instead of MR launcher, new actions, code clean up. - Adopted from: Apache Oozie by Mohammad Kamrul Islam and Aravind Srinivasan
- 6. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie Complaints • Launcher jobs as map tasks • Dated UI • Confusing object model & XML – workflows, coordinators, bundles • Complicated setup • DAG visualization • SLA alerting • Fine grained authorization • Easy access to log files
- 7. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie Complaints Improvements • Launcher jobs as map tasks – solved by Oozie 5.0.0, OOZIE-1770 • Dated UI – OOZIE-2683, targeted for Oozie 5.X (Hue and Workflow Manager today) • Confusing object model & XML – jobs API, patch available, targeted for 5.1, OOZIE-2339 • Complicated setup – can deploy with embedded Jetty in Oozie 5.0.0, OOZIE-2666 • DAG visualization – solved by Oozie 5.0.0, OOZIE-2406 • SLA alerting – since Oozie 4.0.0, OOZIE-1294 • Fine grained authorization – targeted for Oozie 5.X, OOZIE-3196 • Easy access to log files – solved by Diagnostic Tool in Oozie 5.0.0, OOZIE-2296
- 8. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie UI – React Mock-Up - OOZIE-3283 • Workflows
- 9. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie Launcher – Prior to Release 5.0 • MR launcher job
- 10. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie Launcher – Release 5.0 • OYA: OOZIE-1770: Create Oozie Application Master for YARN — Removes MR launcher job • Design Doc
- 11. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie Documentation – Before Release 5.0 and After Documentation redesign OOZIE-3163: Improve documentation rendering: use fluido skin and better config
- 12. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie Workflow Visualization – Prior to 5.0 and After Jung GraphViz OOZIE-2406: Completely rewrite Graph Generator code
- 13. © 2018 Bloomberg Finance L.P. All rights reserved. Oozie Fluent Job API – Apache Oozie 5.1 OOZIE-2339: Provide an API for writing jobs based on the XSD schemas
- 14. © 2018 Bloomberg Finance L.P. All rights reserved. Apache Ambari Ambari Provides: • Provisioning of a Hadoop Cluster • Management of a Hadoop Cluster • Monitoring of a Hadoop Cluster — A Metrics System for metrics collection — An Alert Framework — A dashboard for monitoring the Hadoop cluster -Paraphrased from http://ambari.apache.org
- 15. © 2018 Bloomberg Finance L.P. All rights reserved. Ambari Views • Ambari Views ”offer a systematic way to plug-in UI capabilities to surface custom visualization, management and monitoring features in Ambari Web. A "view" is a way of extending Ambari that allows 3rd parties to plug in new resource types along with the APIs, providers and UI to support them. In other words, a view is an application that is deployed into the Ambari container.” • Key takeaways: — One does not need an Ambari managed (administrated) cluster — Third parties can build views packages to run in the Ambari framework too — Major views available: (YARN) Capacity Scheduler, (HDFS) Files, HAWQ, Hive, Pig, Storm, Tez, (YARN ATS) Jobs, (Oozie) Workflow Manager • Alternatives: Cloudera Hue, bespoke applications
- 16. © 2018 Bloomberg Finance L.P. All rights reserved. Workflow Manager – Motivation • Oozie workflows are defined in XML – too verbose — Provide GUI workflow builder and editor — Reduce possibility of user introduced errors — Provide browser based workflow manager • Integration with File Browser — Includes S3 support — Can replace existing Oozie web UI • Oozie is hard-coded to display only 25 actions — WFM doesn’t have this limit; tested with 300+ action nodes • Oozie is scalable — Can scale WFM by standing-up multiple Ambari Views servers
- 17. © 2018 Bloomberg Finance L.P. All rights reserved. Workflow Manager – Workflow Editor Example Workflow Manager: • Available as an Ambari View • Enables visual editing of Oozie workflows • Integrated with file browser • Reduces user input errors • Minimal input required
- 18. © 2018 Bloomberg Finance L.P. All rights reserved. Workflow Manager – Execution View Example • Integrated Dashboard with Workflow Manager View • Manage Oozie jobs • Drill down to logs
- 19. © 2018 Bloomberg Finance L.P. All rights reserved. Workflow Manager – Workflow Design Component
- 20. © 2018 Bloomberg Finance L.P. All rights reserved. Workflow Manager – Workflow Dashboard Component Good Documentation: HDP 2.6 – Workflow Manager Basics
- 21. © 2018 Bloomberg Finance L.P. All rights reserved. Art of Possible • Scheduling “non-traditional” Hadoop workflows — Schedule SQL maintenance operations — Launch SQL Server on Linux in Docker on YARN for tests — Warming Caches (HBase, LLAP, etc.) • Administrative Tasks — Log clean-up — Clean-up crashed/abandoned Hive temporary data — HBase management
- 22. © 2018 Bloomberg Finance L.P. All rights reserved. DataWorks Summit San Jose 2018 • Setup Oozie – Server and Workflows • Data Definition – Tables, ACLs • Compactions – Operational Workflow Manager Examples with HBase
- 23. © 2018 Bloomberg Finance L.P. All rights reserved. HBase – Setup Oozie needs HBase Configuration: • Oozie Server Code (to support HBase delegation tokens) — In libexec (see Server JARs list) — In oozie-site.xml <name>oozie.credentials.credentialclasses</name> <value>hbase=org.apache.oozie.action.hadoop.HbaseCredentials,…</value> </name> • Client Workflow Code: — Add to workflow.xml: <credentials> <credential name=”myhbase_creds” type=”hbase”> […] </credential> </credentials> — All your normal HBase security settings in the credential section • Server JARs: (Copy the following to Oozie’s libexec) — hbase-common.jar — hbase-client.jar — hbase-server.jar — hbase-protocol.jar — hbase-hadoop2-compat.jar
- 24. © 2018 Bloomberg Finance L.P. All rights reserved. create_my_table.rb: tables = list tables.select { |table| table.eql?('my_table') } if tables.empty? create 'my_table', {NAME => 'my_col'} end exit HBase – Data Definition HBase Shell: <action name="HBASE-Shell" cred="hbase_creds"> <shell xmlns="uri:oozie:shell-action:0.1"> <job-tracker>${jobTracker}</job-tracker> <name-node>${nameNode}</name-node> <exec>hbase</exec> <argument>shell</argument> <argument>-n</argument> <argument>create_my_table.rb</argument> </shell> <ok to="do_more_things"/> <error to="fail"/> </action>
- 25. © 2018 Bloomberg Finance L.P. All rights reserved. HBase – Compactions HBASE-19528: Major Compaction Tool • Automatically scales compaction to selected number of servers • Requires read ability to /hbase usage: MajorCompactor [-cf <arg>] [-dryRun] -servers <arg> -table <arg> [...] Usage instructions -cf <arg> column families: comma separated eg: a,b,c -dryRun Dry run, will just output a list of regions that require compaction based on parameters passed -minModTime <arg> Compact if store files have modification time < minModTime -servers <arg> Concurrent servers compacting -table <arg> table name ...
- 26. © 2018 Bloomberg Finance L.P. All rights reserved. More Resources • Apache Oozie Mailing Lists: http://oozie.apache.org/mail-lists.html • Artem’s Oozie Resources: —12 Part Series on WFM: http://bit.ly/2syKUIh — Oozie Examples: https://github.com/dbist/oozie-examples • Clay’s Past Oozie Presentations: — Code Deployment via Oozie: Apache BigData http://bit.ly/2sP2qbj — HBase Multi-Tenancy with Oozie: DataWorks Summit http://bit.ly/2rw7FIR
- 27. © 2018 Bloomberg Finance L.P. All rights reserved. DataWorks Summit San Jose 2018 Demo!
- 28. © 2018 Bloomberg Finance L.P. All rights reserved. DataWorks Summit San Jose 2018 Questions?