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OpenShift Overview

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OpenShift cloud technology high-level overview given at the Athens Area Software Developer Meet-up in Athens, Georgia, January 2014.

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OpenShift Overview

  1. 1. OPENSHIFT baron@baronchandler.com Baron Chandler @msthebaron
  2. 2. AGENDA • What is OpenShift? • How much does it cost? • Gears and Cartridges • Why does WiserTogether use OpenShift? • How can I play?
  3. 3. Platform as a Service (PAAS) Backed by RedHat Built on Linux Standards Not Virtualized Shared Hosting Environment* “Hybrid” Cloud Environment
  4. 4. OpenShift Licensing Options fedora RHEL Origin Enterprise RedHat Cloud
  5. 5. OpenShift Origin Community Supported Very Active Development Full Source on GitHub Free-as-in-Beer installation options: web, live ISO, kickstart
  6. 6. OpenShift Enterprise Slower / More Stable Release Roadmap Runs on RHEL 6 Yearly Subscription ($$) Available thru VARs Free Evaluation Available
  7. 7. OpenShift Online RedHat-Hosted Service Free Tier (up to 3) “Silver” Tier (up to 16) for $20/mo plus a few ¢/hr/gear visit: www.openshift.com
  8. 8. Quick Recap • RedHat’s foray into cloud offerings. • Built on standard Linux technology. • Three options: Origin (free), Enterprise ($$), Cloud (hosted)
  9. 9. Gears and Cartridges “((AND BEARS, OH, MY!!))”
  10. 10. Gears Containers with resource limits which run applications: • Small • Medium • Large … Sizing is configured platform-wide by server admin. “Gear” — http://www.flickr.com/photos/m
  11. 11. Cartridges Added to gears to support languages, databases, or even applications. PHP, python (2.6,2.7,3.3), Ruby (1.8/1.9), PostgreSQL, MySQL, Mongo, JBoss, perl, node.js, Go, Drupal, WordPress, Jenkins, Travis CI, more … plus the community cartridges (or, even, your own). “Cartridge” — http://en.wikipedia.org/wiki/
  12. 12. * Standard Technologies selinux quota cgroups Source Collections (SCL) work together to secure shared environment.
  13. 13. Built With… Ruby BIND bash scripts git MongoDB* ssh Apache env vars * Makes OpenShift Web Scale™
  14. 14. Quick Recap • Built on standard Linux technology. • SCL allows multiple versions of code to be installed together on the same running server. • Gears provide non-virtualized, secure, and constrained shared environment for your code. • Features added with cartridges from RedHat, community, or your own DIY cartridge repo.
  15. 15. OpenShift Console
  16. 16. OpenShift RHC Tool $ rhc Usage: rhc [--help] [--version] [--debug] <command> [<args>] ! Command ! line interface for OpenShift. Getting started: create-app apps add-cartridge set-env Create an application List all your applications Add a cartridge to your application Set one or more environment variable(s) to your application Working with apps: tail snapshot git-clone Tail the logs of an application Save the current state of your application locally Clone and configure an application's repository locally ! ! Management commands: app Commands for creating and managing applications env Manages user-defined environment variables set on a given application ssh SSH into the specified application !
  17. 17. So, Why Does Wanna Use OpenShift?
  18. 18. Services. Lots of ‘em.
  19. 19. Release Management Evolution of the Legacy Production and Staging Environment
  20. 20. web app S assets S Production S Deploy data S Development content Peer Review / Testing OpenShift Workflow Multiple, Parallel Workstreams with Ad-Hoc Teams
  21. 21. Other Advantages • Ad-hoc workgroups and priorities. • Similar config and deployment “machinery.” • Cartridges = flexible stacks per service. • Code no longer marinates in fetid waters.
  22. 22. Other Advantages • Huggy-kissy technology for nerds. • App configuration is $OPENSHIFT_ENV-driven. • Hybrid cloud model.
  23. 23. Putting It Together Knockout To Do Demonstration ! ! 1. Create node.js app 2. ???? 3. Profit.
  24. 24. Lots More Cool Stuff • Custom cartridges • Automated deploys / CI • Scalable applications • rhc / oo-* commands • Deploy hooks • Broker REST API • Group development • Snapshot and restore • Port forwarding • Logging and debugging It’s Ruby, it’s shell, it’s Linux, you’ll find something to hack.
  25. 25. Broker: Master Control Manages applications and DNS Manages users, git, ssh on nodes Runs OpenShift Console Provides REST-style API
  26. 26. Nodes: Workers Hosts applications Endpoints for ssh and git Cartridges installed here Can auto-scale
  27. 27. You Can’t Win, If’n Y’on’t Play https://www.openshift.com/ To sign up for 3 free hosted gears. https://github.com/openshift/origin-server Take a look at the code behind the curtain. http://openshift.github.io/ The community OpenShift website. #openshift-dev on Freenode Talk smack about people’s mamas on IRC with the developers.
  28. 28. You Can’t Win, If’n Y’on’t Play https://install.openshift.com/ “Easy Button” install your own instance. http://openshift.github.io/documentation/oo_cartridge_developers_guide.html All you need to know to roll your own.
  29. 29. https://mywiserhealth.com/

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