The document presents an introduction to Platform as a Service (PaaS) and OpenShift for developers, focusing on streamlining software development with open-source technologies. It outlines the developer workflow, the role of DevOps in enhancing collaboration and automation, and provides a quick guide to using OpenShift, including application creation and continuous integration with Jenkins. Additionally, it highlights the benefits of containers over traditional virtual machines and offers resources for getting started with OpenShift.

1. SouthEast | LinuxFest
LINUX IN THE GNU/SOUTH
Speed Up Software Development
A introduction to PaaS and OpenShift
for developers
By Peter Larsen
Red Hat Solutions Architect
plarsen@redhat.com / peter@peterlarsen.org

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About MeAbout Me
● I work at Red Hat (plarsen@redhat.com)
● Have used Linux since “forever” - approx '93
● Worked in IT for almost 30 years
● Started programming on Mainframes (yeah, I'm old)
● Worked as consultant, architect, developer, DBA, system
administrator, “storage guy”, data center planning etc.
● My Job is to talk about Open Source technologies
Yup! They pay me to do that!

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Developer ScenariosDeveloper Scenarios
● Get Great Idea
● Convince Boss that it's a good idea – or get resources to do it the
Open Source way (get hardware etc)
● Install OS
● Install Application Server software (Java, JBoss, Tomcat, Apache,
PHP, Ruby, Python etc)
● Configure server to fit needs – Add DB, LB, Failover etc.
● Start coding (unless you are now so frustrated that you don't care).

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After you get startedAfter you get started
● Defining a consistent build system
● Creating/using source repository with git or similar SCM
● Executing test scenarios
● Making predictable deployments

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What is this DevOps thing?What is this DevOps thing?
Operations
Development
Business
Needs
DevOps
Development
Business
Needs
Operations
Collaboration, Process Automation & Communication
Market Demand
Competitive Advantage
Time to Market
Agility
Quality Assurance
IT Investment
Security
Availability
Governance & Control
Long term stability
Operating Cost
Standardization
New Application Features
Development Speed
Fast release cycles
Ease of Deployment
Test Infrastructure
Development Infrastructure
Process Alignment
Collaboration
Lifecycle Management
Time to Market
Business Agility
Improved Quality
Automation

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Introducing containersIntroducing containers
● Based on known “templates” of system configurations
● Instantiate in seconds
● Maintain a template – update all instances
● Much simpler than a Virtual Machine (VM)
● Just as secure if not more as a VM
● Light weight – can run a lot more on the same hardware vs. a
hypervisor with VMs

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RHEL
Red Hat Enterprise Linux
Node
Public / Hybrid / Private / Virtualization / Bare Metal
DEVELOPER
USER
GIT/SSH
cron
logs
sshd
HTTP/S
MY GEAR
Broker (RHEL)
Node (RHEL)
Node (RHEL)
REST
Web Console
Eclipse IDE
Cmd Line
SELinux
GEAR
jenkins
Maven
CGroups
OpenShift ArchitectureOpenShift Architecture
MyApp
Code
Git
Repo
php
Jenkins
MySQL

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Innovation
Stabalization
Innovation
Stabalization
OpenShift
Origin
OpenShift
Online
OpenShift
Enterprise
Apps
Portability
Open Source
Community Project
On-demand Service
Operated by Red Hat
at OpenShift.com
Commercially
Supported “On
Premise”
Version
OpenShift VersionsOpenShift Versions

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From 0 to 60 in 5 secondsFrom 0 to 60 in 5 seconds
● rhc app create coolapp php-5.4 mysql-5.5
● cd coolapp
● add/edit some files
● git add . && git commit -am “First version”
● git push
● Point browser to application on web
● DONE

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Jenkins controlJenkins control
● Associate with Jenkins for Continious integration
● rhc app create jenkins
● rhc cartridge add -a coolapp -c jenkins
(or add “--enable-jenkins” when creating the gear)
● When pushing code Jenkins executes and controls build

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How to install/get startedHow to install/get started
● Go to http://openshift.com and get started for free
● Install your own: Fedora or CentOS are good starting grounds
http://openshift.github.io/
https://install.openshift.com
● Workstations need “rhc” - an easy rubygem install (rubygem
install rhc)

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CartridgesCartridges
● Cartridges are the “templates” of OpenShift
● http://openshift.github.io/documentation/oo_cartridge_developers_gu
● Uses yaml metadata to describe cartridge

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SouthEast | LinuxFest
LINUX IN THE GNU/SOUTH
Demo time

14. June 2014 SELF 2014 | peter@peterlarsen.org 14
SouthEast | LinuxFest
LINUX IN THE GNU/SOUTH
Thank You
Slides available: http://slidesha.re/1wi5wxa