Webinar on "DevOps LifeCycle and SCM using common Git commands for version control"

Confidential | Copyright © DevOps++ Alliance
Welcome to Wednesday Webinar
DevOps LifeCycle and SCM using common
Git commands for version control
By: Valerian D’Souza
Steering Committee Member ATA
and DevOps++ Alliance

Wednesday Webinar brought to
you by

Agenda
1.DevOps Trends
2.Agile v/s DevOps
3.DevOps
4.Why DevOps
5.DevOps LifeCycle (DLC)
6.1st Step in DLC - SCM

10 Sec Intro
Valerian D’Souza
30+ years experience
B.Com, llB
I am an Agilist!
@val99999
www.agiletestingalliance.org
www.devopsppallinace.org

DevOps Trends

Job Vacancy Trend 2011-2017

Salary Trend

Before we get into DevOps
What is waterfall and what is agile?

https://www.pinterest.com/pin/347340189981513267/

One basic tenet of the Agile development process is to deliver
working software in smaller and more frequent increments
as opposed to the "big bang" approach of the waterfall method.
This is most evident in the Agile goal of providing potentially
shippable features at the end of each sprint—typically every
two weeks.
https://en.wikipedia.org/wiki/Scrum_(software_development)http://www.ibm.com/developerworks/library/se-devops/part1/

High deployment rates will often result in work to be deployed
piling up for IT operations.
Clyde Logue, founder of StreamStep, is attributed with saying:
"Agile was instrumental in development regaining the
trust in the business, but it unintentionally left IT
operations behind”
http://www.ibm.com/developerworks/library/se-devops/part1/

https://digitalcharm.wordpress.com/

Differences in dev
and ops
environments cause
failures
Backlog of agile
releases that Ops
cannot handle
Manual (tribal)
processes for release
lack
repeatability/speed
Lack of feedback and
quality metric leads to
missed service level
targets
Daily
Build
Monthly
Delivery
Who did
this last
time?
Dave…
Dave’s not
here man…
Dev
Prod
https://sdarchitect.wordpress.com/2013/08/07/updated-devops-101-deck/

DevOps and Agile
• DevOps is especially complementary to the Agile software
development process.
– extends and completes the continuous integration and release process by
ensuring that code is production ready and will provide value to the
customer
• DevOps enables a far more continuous flow of work into IT
Operations.
– If development delivers code every two weeks but it's deployed only every
two months, customers don't get value and the deployments often result
in chaos and disruption.

DevOps

DevOps Definition
• DevOps = Development & Operations
• A Methodology of Continuous Delivery
• A software development method that
stresses communication, collaboration
and integration between development
and IT professionals.
• “Streamlining” release process.

Why DevOps

Why DevOps ?
Lets Discuss.

Disconnected and in phases
1. Pre-sales
2. Business Analysts
3. Technical Architects
4. Coders
5. Testers
6. Operations

And now we go fast!!
BBC Top Gear

And the first Casualty is testing..
Coding
Testing
Mini
Waterfall ScrumFall
Wet Srum Testing as a
phase

Shift-Left Testing
http://techarcis.com/wp-content/uploads/2016/06/shift-left-testing.jpg
Lesson learnt:
Quality is everyone’s responsibility and testing should be
pervasive across Software Development and early testing

Same Solution – Shift Left Ops
https://sdarchitect.files.wordpress.com/2013/04/shift-left.png

Benefits of DevOps
• Because companies that incorporate DevOps practices get more done, plain and
simple
• They deploy code up to 30 times more frequently than their competition
• And less than 50% of their deployments fail
Technical Benefits:
• Continuous software delivery
• Less complex problems to fix
• Faster resolution of problems
Business Benefits:
•Faster delivery of features
•More stable operating environments
•More time available to add value
(rather than fix/maintain)

In Simple Words ?
• You don’t have to choose stability versus new features.
• You get increased effectiveness.

DevOps Life Cycle
1
2
3 4 5
6
7

Software Configuration Management

Config Mgmt And Testing

TYPES OF SCM

Local Version Control Systems

Central Version Control System

Distributed Version Control System

Good SCM Tool
• Features of a good SCM Tool:
– Ease for the developers to work simultaneously
– Ensuring that the developers don’t over write watch
others code
– Maintenance the history of everything

Popular SCM Tools
• Git
• Subversion
• Mercurial
• Clearcase

Git
• Most widely used modern version control system in
the world
• DVCS-Distributed Version Control System
– Rather than have only one single place for the full
version history of the software, every developer's
working copy of the code is also a repository that can
contain the full history of all changes
– Almost all operations are local

Stream of Snapshots

Three Stages

Simple Git commands – Part 1
Git --version
Git init
Git config --global user.name “ValsGithub”
Git config --global user.email valerian@gmail.com
Git config –list
Git config user.name
Git help <command> e.g. add
Git add
git commit –m “Version Message”

Simple Git commands – Part 2
.gitignore
Git diff (difference in working area which have not yet been staged)
Git diff --staged (difference between staging area and last committed)
Git commit –a –m “Version Message” (Directly commit from Working Directory”
Git rm <filename> (Removes files from Staging and Working area)
Git reset HEAD <filename> (To retrieve from Committed Area)
Git mv <fromfilename> <tofilename> (To rename a file)
Git log (Shows all commits with Shas)
Or
Git log -<number> (show latest number of commits)
Git checkout –file (unmodifies the file from working directory)

About CP-DOF
http://cpdof.devopsppalliance.org/

CP-DOF is the only certification program covering end to end lifecycle using practical
case study and tools

Thank You
For queries – please send an email to
Harsh.Shah@ATAEvents.org
@devOpsPP
@AgileTA

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