This was a talk I did in Dublin at an event called Redefining the Enterprise OS Breakfast Briefing - How to meet next-generation IT demands for Linux Containers, Docker, Performance & Systems Management http://techxperts.eu/events/redefining-the-enterprise-os-breakfast-briefing/

1. 1 Jeremy Brown
Docker and DevOps
Why it matters
Jeremy Brown
Head of Middleware UK&I, Red Hat
jeremy@redhat.com
@tenfourty

2. 2 Jeremy Brown
Agenda
● DevOps
● Linux Containers AKA Docker
● OpenShift V3

3. 3 Jeremy Brown
In the beginning...

4. 4 Jeremy Brown

5. 5 Jeremy Brown
Traditional relationship between Dev and Ops
● Communication between teams is non existent as they are in different silos.
● Developers wait weeks for a testing environment
● Developers develop on one platform and deployment to another
● Code is not in version control, so rollback is almost impossible
● Code breaks in prod as testing and prod environments do not look the
same ( The blame game )

6. 6 Jeremy Brown
Traditional relationship between Dev and Ops
● Operations does not understand how to install and run the application
neither does the developer
● Developers have no clue about the actual load they will face in a real
production environment
● Let's be honest. This sucks!

7. 7 Jeremy Brown
I pushed my code
why is it not in prod?
Do you have a
ticket?

8. Let there be DevOps!

9. DevOps integrates developers and
operations teams in order to improve
collaboration and productivity by
automating infrastructure, automating
workflows and continuously measuring
application performance.
Key concepts:
●Small changes -> Less Risk
●Fail fast and recover vs. Never fail
●Culture change: Acceptance of
failure

13. Linux Containers AKA Docker!

14. Linux Containers AKA Docker!

15. Linux Containers AKA Docker!

16. 16 Jeremy Brown
WHAT ARE LINUX CONTAINERS?
Software packaging concept that typically includes an
application and all of its runtime dependencies.
● Easy to deploy and portable
across host systems
● Isolates applications on a
host operating system
● In RHEL, this is done through:
● Control Groups (cgroups)
● kernel namespaces
● SELinux, sVirt, iptables
● Docker
HOST OS
SERVER
CONTAINER
LIBS
APP

17. 17 Jeremy Brown
WHAT ARE LINUX CONTAINERS?
Software packaging concept that typically includes an
application and all of its runtime dependencies.
● Easy to deploy and portable
across host systems
● Isolates applications on a
host operating system
● In RHEL, this is done through:
● Control Groups (cgroups)
● kernel namespaces
● SELinux, sVirt, iptables
● Docker
HOST OS
SERVER
CONTAINER
LIBS
APP
Dockah Dockah Dockah!!!

18. 18 Jeremy Brown
“Everything at Google, from Search to Gmail, is packaged and run in a
Linux container.”1
- Eric Brewer, VP of Infrastructure, Google
SOME OF THE MOST ADVANCED INFRASTRUCTURES RUN ON
CONTAINERS
1
Source: http://googlecloudplatform.blogspot.com/2014/06/an-update-on-container-support-on-google-cloud-platform.html

19. 19 Jeremy Brown
APPLICATION DELIVERY VIA CONTAINERS

20. 20 Jeremy Brown
MANY SEE CONTAINERS AS THE UTOPIA OF APPLICATION
DELIVERY
Provide app high availability
Consolidate servers
Lower deployment costs
Streamline dev and test
Reduce effort to deploy apps
Deploy apps faster
0 0.1 0.2 0.3 0.4 0.5 0.6
24%
25%
30%
38%
51%
54%
% of respondents
Source: TechValidate survey of 79 IT professionals
“What top benefits do you see with containers?”

21. 21 Jeremy Brown
BENEFITS OF CONTAINERS
DEPLOYMENT
FLEXIBILITY
FASTER APP
DELIVERY
OPERATIONAL
EFFICIENCY
LOWERED
DEPLOYMENT
COSTS
Containers transform the way you
deliver applications to accelerate innovation.

22. 22 Jeremy Brown
TOP 5 FACTS ABOUT CONTAINERS
Containers are not new.
Containers do not equal virtualization.
Containers are not universally portable.
Containers do not contain.
Containers are enterprise-ready.
1
2
3
4
5

23. OpenShift

24. OPENSHIFT V3 INTEGRATES DOCKER
● Multi-version packaging format and isolation
● Simplified container API (Docker libcontainer)
● Easy to create (Dockerfile)
● Atomic deployment (Docker images)
● Large ecosystem (Docker Hub)

25. 25
● Container orchestration at scale
● Wiring of multi-container, multi-host
application topologies
● Scheduling / placement
● Manage container health
OPENSHIFT V3 BUILT ON KUBERNETES

26. Sebastian Faulhaber (sebastian.faulhaber@redhat.com)26
WITH DEVOPS POWERED
BY OPENSHIFT…
IDEA CODE PRODUCTION
IN
MINUTES / HOURS / DAYS
INSTEAD OF
WEEKS / MONTHS / YEARS