Dev ops overview (brief)

Feb 22, 2015Download as PPTX, PDF2 likes798 views

The document discusses the concepts of continuous integration (CI), continuous delivery (CD), and DevOps. It describes how fragile and unstable application development processes can lead organizations into a downward spiral of technical debt and tension between development and operations teams. The DevOps model is presented as an alternative that emphasizes automation, measurement, sharing, and feedback cycles. Specific practices like microservices, canary releasing, and chaos engineering are presented as ways to enable continuous delivery. Examples from companies like Etsy and GitHub are provided.

What’s the commotion about
Overview of what is happening in the industry
around CI/CD and DevOps
10/8/12 © Copyright 2012 Constant Contact Inc.

Are you aware of what is happening out there?
© Copyright 2013 Constant Contact Inc. 2

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On the Care and Feeding of Feedback Cycles by Elisabeth Hendrickson @ FLOWCON 2013

© Copyright 2013 Constant Contact Inc. 4
On the Care and Feeding of Feedback Cycles by Elisabeth Hendrickson @ FLOWCON 2013

© Copyright 2013 Constant Contact Inc. 5
On the Care and Feeding of Feedback Cycles by Elisabeth Hendrickson @ FLOWCON 2013

Operations sees …
 Fragile applications are prone to
failure
 Long time required to figure out
“which bit got flipped”
 Detective control is a salesperson
 Too much time required to restore
service
 Too much firefighting and unplanned
work
 Planned project work cannot
complete
 Frustrated customers leave
 Market share goes down
 Business misses Wall Street
commitments
 Business makes even larger
promises to Wall Street
© Copyright 2013 Constant Contact Inc. 6
 More urgent, date-driven projects put into
the queue
 Even more fragile code put into production
 More releases have increasingly “turbulent
installs”
 Release cycles lengthen to amortize “cost
of deployments”
 Failing bigger deployments more difficult to
diagnose
 Most senior and constrained IT ops
resources have less time to fix underlying
process problems
 Ever increasing backlog of infrastructure
projects that could fix root cause and
reduce costs
 Ever increasing amount of tension
between IT Ops and Development
Dev sees …
The Downward Spiral (from Gene Kim)

These are business problems!
 Pressure on dev teams forces them to take shortcuts and
accumulate technical debt
 Attention to Automated testing is reduced and the coding is
slashed
 Assumption that QA will catch the problem - beginning of throw
over the wall
 QA is starting to run behind the schedule because the amount of
work increasing
 Dev cycle is increasing by taking time from QA
 QA is starting to fortify the wall and put processes in place
requiring strict documentation of what has changed
 Code gets into a fragile steaming hot pile that no one wants to get
close to and even touch
 Lead developer gets bored, frustrated and burned out and leaves
 Hot pile stays there forever
© Copyright 2013 Constant Contact Inc. 7

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© Copyright 2013 Constant Contact Inc. 9

© Copyright 2013 Constant Contact Inc. 10
Devops Modelling by Patrick Debois @ YOW! 2013

© Copyright 2013 Constant Contact Inc. 11

What is DevOps?
© Copyright 2013 Constant Contact Inc. 12
http://www.devopsdays.org/blog/2010/05/16/the-panel-experiment-and-ignite-devops/

DevOps = CAMS / CLAMS / CALMS
 Culture
 Automation
 (Lean)
 Measurement
 Sharing
© Copyright 2013 Constant Contact Inc. 13
 Culture
 Fast feedback
 Direct connections
 Data-based communication
 Enablement, not self-protection
John Willis (the Demming of DevOps)
Inverse incentives:
• measure Ops on # of released features
• Devs on stability of their apps in production

 Measurement
 Measure everything
 Sharing
 Share information
 Share power
 Share knowledge
© Copyright 2013 Constant Contact Inc. 14
 Automation
 Lightweight tools,
readiness to discard or
change tools
 Open-source bias
 Automate for leverage
to change
 Embrace & adopt
“developer” tools
 SCM
 Configuration
Management

What is Continuous Delivery?
 reduce the cost, time, and risk
of delivering incremental changes to users
© Copyright 2013 Constant Contact Inc. 15

Lean thinking …
 Deliver fast
 Build quality in
 Optimize the whole
 Eliminate waste
 Amplify learning
 Decide late at last responsible moment
 You have the best information possible to make your
decision
 Empower team

© Copyright 2013 Constant Contact Inc. 17
On the Care and Feeding of Feedback Cycles by Elisabeth Hendrickson @ FLOWCON 2013

Micro-services!
© Copyright 2013 Constant Contact Inc. 18

© Copyright 2013 Constant Contact Inc. 19
v1
v2
Ruby
Java

Canary Releasing
© Copyright 2013 Constant Contact Inc. 20

Data Migration
© Copyright 2013 Constant Contact Inc. 21
Jez Humble on Continuous Delivery @ Devops days 2010

Examples from the Industry
10/8/12 © Copyright 2012 Constant Contact Inc.

© Copyright 2013 Constant Contact Inc. 23

© Copyright 2013 Constant Contact Inc. 24

© Copyright 2013 Constant Contact Inc. 25

Either you break it or our users will
© Copyright 2013 Constant Contact Inc. 26
Add some Chaos to the system
You Don’t Choose Chaos Monkey …
Chaos Monkey Chooses You

© Copyright 2013 Constant Contact Inc. 27
Histrix Circuit Breaker

Turbine Dashboard
© Copyright 2013 Constant Contact Inc. 28

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© Copyright 2013 Constant Contact Inc. 30

© Copyright 2013 Constant Contact Inc. 31

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http://www.slideshare.net/beamrider9/continuous-deployment-at-etsy-a-tale-of-two-approaches

Etsy
© Copyright 2013 Constant Contact Inc. 33

© Copyright 2013 Constant Contact Inc. 34

© Copyright 2013 Constant Contact Inc. 35

ChatOps @ GitHub
© Copyright 2013 Constant Contact Inc. 36

Books
© Copyright 2013 Constant Contact Inc. 37

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