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

1. OPENSHIFT
baron@baronchandler.com
Baron Chandler
@msthebaron

2. AGENDA
• What is OpenShift?
• How much does it cost?
• Gears and Cartridges
• Why does
WiserTogether use
OpenShift?
• How can I play?

3. Platform as a Service (PAAS)
Backed by RedHat
Built on Linux Standards
Not Virtualized
Shared Hosting Environment*
“Hybrid” Cloud Environment

4. OpenShift Licensing Options
fedora
RHEL
Origin
Enterprise
RedHat Cloud

5. OpenShift Origin
Community Supported
Very Active Development
Full Source on GitHub
Free-as-in-Beer
installation options: web, live ISO, kickstart

6. OpenShift Enterprise
Slower / More Stable
Release Roadmap
Runs on RHEL 6
Yearly Subscription ($$)
Available thru VARs
Free Evaluation Available

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. Quick Recap
•
RedHat’s foray into cloud offerings.
•
Built on standard Linux technology.
•
Three options: Origin (free), Enterprise ($$), Cloud
(hosted)

9. Gears and Cartridges
“((AND BEARS, OH, MY!!))”

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. 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. * Standard Technologies
selinux
quota
cgroups
Source Collections (SCL)
work together to secure
shared environment.

13. Built With…
Ruby
BIND
bash scripts
git
MongoDB*
ssh
Apache
env vars
* Makes OpenShift Web Scale™

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. OpenShift Console

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. So, Why Does
Wanna Use OpenShift?

18. Services.
Lots of ‘em.

19. Release Management
Evolution of the Legacy Production and Staging Environment

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. 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. Other Advantages
• Huggy-kissy technology for nerds.
• App configuration is $OPENSHIFT_ENV-driven.
• Hybrid cloud model.

23. Putting It Together
Knockout To Do
Demonstration
!
!
1. Create node.js app
2. ????
3. Profit.

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. Broker: Master Control
Manages applications and DNS
Manages users, git, ssh on nodes
Runs OpenShift Console
Provides REST-style API

26. Nodes: Workers
Hosts applications
Endpoints for ssh and git
Cartridges installed here
Can auto-scale

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. 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. https://mywiserhealth.com/