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Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
Introduction to tempest
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Introduction to tempest

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  • 1. Introduction to TempestOpenStack Users January 2013 Meetup – India Presenters: Nithya, Sarad & Suresh
  • 2. Agenda• Introduction To Tempest• Explore Tempest• Getting Started with Tempest in Openstack• Role of Tempest in Openstack CI• Pro’s & Con’s• Q&A
  • 3. What is tempest?• Tempest – It’s an Openstack Integration test suite• Based on unittest2 framework & currently uses Nosetest runner• Used by community as gating on commits to trunk• In a nutshell, all it does is run tests against OpenStack service endpoints by exercising API calls & validate the response
  • 4. Tempest explored • Test Types Nova – Smoke Tests – Positive Tests Cinder Glance – Negative Tests – Stress Tests Tempest – White box Tests • Tempest base Quantum Swift – httplib2 – Rest based framework keystone – Nose test runner (testr)
  • 5. Tempest Directory Structure • Common - Rest client & ssh client • Services - services modules (nova, identity, image and network) • Nova implements the OS Nova API • Identity implements the OS Keystone API • Image implements the OS Glance API • Network implements the OS Quantum API • Tests - Contains actual tests. – Rely on the above services (via the Manager) to connect to the system. – Test classes and methods have also access to the tempest configuration. – Test classes must subclass unittest, and they may use nose and unittest specific decorators • etc – tempest.conf
  • 6. Sample Test workflow Test case call base class setup Openstack_ Config.py manager.py Create server call Servers_client (json/xml) REST request Rest_client
  • 7. Supported Clients•REST – Httplib•BOTO – ec2•Novaclient•glance client•swift client•keystone client•SSH – Paramiko•Cloudfile•Quantum client
  • 8. How to Contribute• Prerequisites – Signup CLA – Launchpad account • Upload your SSH keys to Launchpad • Gerrit imports your SSH keys from Launchpad • Subscribe to main openstack mailing list – devstack installed locally • Follow the steps given in http://devstack.org/guides/single- machine.html• Code submission – Clone tempest code – Create a new tempest branch for the bug id – Make required changes – Commit the changes – Submit for review – For resubmitting the changes use commit amend
  • 9. Continuous IntegrationMonitor version control system for changes. Whenever a change isdetected, automatically compile and test the application. Notifydevelopers when things go wrong to get a fix immediately. Watch • CI Tool - Jenkins code • Openstack CI - https://jenkins.openstack.org/ Publish Build • Gate tests – Tempest results Product Run Tests
  • 10. Openstack CI & TempestChange proposed to OS component • https://review.openstack.org/#/cCode approved by core reviewers /17770/ • Tempest gated withJenkins prepares a Virtual Machine – Gate-tempest-merge – Gate-tempest-pep8 Checks out latest code and setup – Gate-tempest-devstack-vm devstack • https://jenkins.openstack.org/vi Run tempest tests ew/Gate/job/gate-tempest- devstack-vm/ Report success / failure at review.openstack.org
  • 11. Tempest Pros and Cons Pro’s Con’s• Modular • Currently tests are not• One unified suite to test all running in parallel openstack components. • Only smoke tests are being• Easily Maintainable run as part of gating• Less complex to create tests process.• Supports most of the client • Stress tests development at interfaces nascent state • Tests for service workflows at the minimal
  • 12. Q&A
  • 13. References• Tempest Presentation by Jay Pipes - https://docs.google.com/presentation/d/1M3XhAco_0u7NZQn3Gz53z9VO HHrkQBzEs5gt43ZvhOc/edit?pli=1#slide=id.p• Openstack CI – http://ci.openstack.org/• Devstack-gate - https://github.com/openstack-infra/devstack- gate/blob/master/README.md• Tempest source - https://github.com/openstack/tempest

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