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DevOpsDevOpsJulien Pivotto

November 6th, 2014

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whoamiwhoamiJulien PivottoJulien Pivotto

• Open-Source consultant at inuits.eu• FOSS defender since 2004• DevOps believer and evangelist• @roidelapluie on twitter/github

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ınuits.eu

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DevOps

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A traditional dev shopA traditional dev shop

Friday, 5PM”Here is the tarball, put thiscode live, now! We are on air

in 20 minutes!”

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A traditional ops shopA traditional ops shop

• Dependencies?• Database?• Security? Scalability?• Performances?• Availability?

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10 days in productionPublic domain http://en.wikipedia.org/wiki/File:Explosions.jpg

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What is happening?What is happening?

Dev• New features• New releases• Response to change

Ops• Stability• Availability• Security

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If agility/lean is limited to one silo,you’ve a problem

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Let's take a closer lookLet's take a closer look

• Devs do sysadmin work▶ Testing▶ Database work▶ Small deployments

• Ops do development work▶ Bash, python scripting▶ Infrastructure as Code▶ Monitoring

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IT is evolvingIT is evolvingYou need to play the gameYou need to play the game

• More velocity• More changes• Volatile environments• Scalability• No space for slow moves• No space for old teams

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What is DevOps?What is DevOps?

DevOps is getting Developersand Ops working together!

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DevOps daysDevOps days

• 200X-2009: World. Patrick Debois, Gildas Le Nadan,

Andrew Clay Shafer, Kris Buytaert, Jezz Humble, Lindsay

Holmwood, John Willis, Chris Read, Julian Simpson, Luke

Kanies, John Allspaw and lots of others…

• 2009: Ghent• 2014: Ghent• Dozens of others (Paris in 2013 and 2015)

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DevOps daysDevOps days

• Talks in the morning• Open-Space in the afternoon• Some big companies have organizedinternal DevOps days

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DevOps is a cultural andprofessional movement

Adam Jacob, OpsCode

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DevOpsDevOps

CultureAutomationMeasurementSharing

John Willis and Damon Edwards

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What can DevOps bring you?What can DevOps bring you?

• Faster TTM• Reliability• Awareness• Trust

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> CultureAutomationMeasurementSharing

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Burn the silosCC-BY 2.0 https://www.flickr.com/photos/cbroders/15427579647

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Build one teamBuild one team

• People with different skills▶ Development▶ CI, CD▶ Testing▶ Infrastructure▶ Monitoring

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A team with one goal:Helping the business

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Enable communicationCC-BY 3.0 http://commons.wikimedia.org/wiki/File:Fiap-paulista-coworking.jpg

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CommunicationCommunication

• Sit together• Mix open space and offices• Standup (virtual, physical)• Mails, mailing lists, chat• Direct communication• One language to rule them all

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Build TrustBuild Trust

• Experiment• Measure success• Measure failure• Automate the things• Trust between people

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Play togetherCC-BY-SA 3.0 http://www.flickr.com/photos/kona99/3987853510/

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Play togetherPlay together

• More idea, creativity• Different approaches• More fun and comprehension• Build trust

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Share responsibilitiesShare responsibilities

• Everyone is responsible• Everyone is on call, even managers• No fingerpointing• Give access

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Do you let a blind person paintyour home?

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Definition of DoneDefinition of Done

A software project is NOT doneuntil your last user is dead

Kris Buytaert

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Culture> AutomationMeasurementSharing

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Automate all the thingsAutomate all the things

• Reproducable build• Robust build

▶ Build on a prod-like environment▶ No more "works on my machine"

• Test• Deploy

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You need to get more confident withyour code

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Test automationTest automation

• Unit tests• Regression tests• Compatibility tests• Selenium, cucumber, …• TTD, BDD

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DevOps (<)> Continuous Delivery

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How many deploys a day?How many deploys a day?

It is NOT a contest!

BUT

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Continuous IntegrationContinuous Integration

• Everyone works in one branch• Run tests on the code• Make a build each time• Deploy each build to a developmentenvironment

• Run tests on that environments

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Continuous Deliveryor

Continuous Deployment

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Continuous DeliveryContinuous Delivery

• A fresh build is always ready to be deployed• The code is always in a good state• Features flag• Human action is needed to deploy

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Continuous DeploymentContinuous Deployment

• Same as Continuous delivery… but• Code is automatically deployed• 0 downtime• Silent upgrades• No human intervention• Requires mature testing infrastructure

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Pipelines

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Learning pathLearning path

• Continuous Integration on a Developmentplatform

• Continous Deployment to UAT• Continuous Delivery to Prod

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PromotionsPromotions

• First click a button• Get more confident• Remove the button

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DeploymentsDeployments

If it hurts, do it more often!

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IACIAC

• Infrastructure as Code• Put infrastructure under version control• History, amend, modelize your infra• Deploy monitoring, backups, apps• This is NOT bash scripting• Deploy new platforms at will• Think puppet, chef, …

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Your infra code is…codeYour infra code is…code

• Puppet/Chef/…code must be deployed• Use CI/CD for them also• Run tests on them• Use the same path

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OrchestrationOrchestration

• Restart all httpd• Which servers have php 53 installed?• Configure db, trigger commands..• On multiple server at the same time• Think mcollective, ansible, …

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CultureAutomation

> MeasurementSharing

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Feedback

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MetricsMetrics

• Collect tons of metrics• Build dashboards• Learn from logs• Learn from *

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Monitor EVERY platformMonitor EVERY platform

• Dev, Uat, Prod• See the troubles early• Measure performance• Observe side effects

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Start with developmentStart with development

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Then runtimeThen runtime

• OS▶ disk, cpu, i/o, memory

• Middleware▶ queues▶ API calls▶ connections

• Application▶ response time▶ users▶ objects▶ usage

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Measure everythingMeasure everything

• Deployments• Commits• Tickets• Kanban queues• WIP

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Read metricsRead metrics

• Get business keys, values• Share dashboards with dev ops mgmt• Find metrics that matter• Expose them• Learn from them

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Use metricsUse metrics

• Analyze them• Prevent expectable failure• Correlate failures• Root cause analysis

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CultureAutomationMeasurement

> Sharing

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ShareShare

• Talk about your experience• Use Open Source software• Publish your re-usable code• Avoid lock-ins

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I have just shared myexperience with you!

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Conclusion: What DevOps is not…

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DevOps is NOT about tools

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DevOps is NOT adding a new team

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DevOps is NOT a job title

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DevOps is NOT a methodology

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You need to make it work for you

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Backlog and participateBacklog and participate

• http://www.devopsdays.org/• http://devopscafe.org/• http://jedi.be/blog/• http://codeascraft.com/• http://krisbuytaert.be/• The Phoenix Project• @devopsdaysparis - April 2015 - Samevenue

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Thank youThank you

Any question?

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ContactContact

Julien Pivottojulien@inuits.eu@roidelapluie

INUITS bvbaBelgium+32 473 441 636https://inuits.eu