OpenShift is a DevOps platform that provides a container application platform for deploying and managing containerized applications and microservices. It uses Kubernetes for orchestration and Docker containers. OpenShift provides features for the complete application lifecycle including continuous integration/delivery (CI/CD), automated image builds, deployments, networking, authentication, and integration with external services and registries. Developers can create and deploy applications from source code, templates, or Docker images to OpenShift without needing deep knowledge of Docker or Kubernetes.

1. OpenShift
A DevOps Platform
DevOpsDays India’16

2. $ whoami
● Name: Lalatendu Mohanty
● Occupation: software engineer
● Company: Red Hat
● Interests: Free software, open source, distributed systems, containers,
● Blog: lalatendu.org

4. Modern Application Development

5. Modern applications
● Commonly delivered as services i.e. software-as-a-service
● Web applications, Mobile application software
● Designed for continuous delivery
● Designed to scale-up and down
● Can utilize modern cloud platforms

6. Modern application development
● Need to match speed of growing business
● Microservices
● Continuous delivery
○ Blue green deployment
○ Canary deployment
● The twelve-factor application for cloud native applications
○ Refer : https://12factor.net/

7. ● A container platform to create, modify, deploy containerized applications.
● Platform to deploy microservices
● Choose programming languages you want
● Continuous deployment
● Self service platform
● Platform as a service
● Can run on physical, virtual infrastructure
● Can run on private and public clouds

8. OpenShift under the hood
● Uses Kubernetes orchestration, management and Docker as the container
technology.
● Features for managing complete application lifecycle
○ Automated image builds and promotion.
○ Deployments integrated with builds, pipeline and CI.
○ Fully integrated Docker registry.
○ Networking (SDN, DNS, routing) for container networking.
○ Integration with Docker Hub and other 3rd party enterprises registries.
○ Integrated enterprise features e.g authentication (LDAP etc), quota etc.

9. Photo credit: http://www.nuagenetworks.net/blog/openshift/

10. Applications in OpenShift
We can use both web console of the OC command line.
Create applications:
● From source code
○ Local or remote git repository
○ Auto detect changes to the applications and trigger the build process.
● Using OpenShift template
● Using docker images
○ E.g. $ oc new-app kubernetes/guestbook

11. Building docker images
● Auto detects the programming language from the source code and converts it
as a runnable docker image.
● End users do not need to write Dockerfile
● Enable existing source build tools e.g. maven, rake
● Project : https://github.com/openshift/source-to-image

13. Running OpenShift on my Laptop?
● $ oc cluster up
○ Get OC binary from https://github.com/openshift/origin
○ Run “$oc cluster up”
● Container Development Kit (CDK)

14. Demo

15. OpenShift as a PaaS
● Autoscaling
○ Need Metrics enabled (Heapster or combination of Heapstar and Hawkular)
● HAProxy
● Integrating external service
● Router
● Container health check using Kubernetes probe
● Logging infrastructure can be integrated e.g. EFK (Elasticsearch, Fluentd,
Kibana)
● Quota
○ Allocating resource quota for a project in OpenShift

16. For Developers
● Eclipse IDE integration.
● Developers do not need to know much about Docker and Kubernetes.
● Integration with Jenkins running in OpenShift
● Ability to move from QA -> Stage -> Production

17. OpenShift Pipeline
● Based on Jenkins pipeline

18. OpenShift offerings
● OpenShift Origin
○ Community edition
● OpenShift Online
○ Hosted solution
○ Tryout: https://www.openshift.com/devpreview/register.html
● OpenShift Dedicated
○ Deployed on cloud e.g. AWS, Google cloud platform.
● OpenShift Container Platform
○ Product for on-premise cloud

19. Red Hat container development kit
● Development environment same as the production environment.
● Setup OpenShift container platform on top of RHEL Vagrant guest.
○ One command to set up/destroy i.e. “vagrant up” roy" and “vagrant destroy”
○ There are templates of sample applications.
● Get single node Kubernetes setup or Docker run time Windows, OS X,
Linux/GNU.
● Overview: http://developers.redhat.com/products/cdk/overview/
● Get started: http://developers.redhat.com/products/cdk/get-started

20. Competitive Edge
● Built with proven open source technologies from established communities.

21. References
● http://www.slideshare.net/greghoelzer7/red-hat-openshift-v3-overview-and-de
ep-dive
● https://access.redhat.com/documentation/en/openshift-enterprise/3.0/single/ar
chitecture/

22. Questions?