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DevOps 101

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DevOps 101 Ernest Mueller @ernestmueller theagileadmin.com


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Questions I Will Answer Today What Is DevOps? What Problems Will DevOps Help Me Solve? How Do I Get Started? What Mistakes Can I Avoid?


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Who Am I?


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The Problem In A Nutshell Everything needs software. Software runs on a server to become a service. Delivering a service from inception to its users is too slow and error-prone. There are internal friction points that make this the case. This loses you money. (Delay = loss) Therefore IT is frequently the bottleneck in the transition of “concept to cash.”


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Symptoms Defects released into production, causing outage Inability to diagnose production issues quickly Problems appear in some environments only Blame shifting/finger pointing Long delays while dev, QA, or another team waits on resource or response from other teams “Manual error” is a commonly cited root cause Releases slip/fail Quality of life issues in IT


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Why Does This Problem Exist? “Business-IT Alignment?” The business has demanded the wrong things out of IT Cost sensitive Risk averse IT has metastasized over time into a form to give the business what it’s said it wants Centralized and monolithic Slow and penny wise, pound foolish


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But Then We Demanded Innovation


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DevOps Defined DevOps is the practice of operations and development engineers participating together in the entire service lifecycle, from design through the development process to production support. DevOps is also characterized by operations staff making use many of the same techniques as developers for their systems work.


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DevOps Defined DevOps is the practice of operations and development engineers participating together in the entire service lifecycle, from design through the development process to production support. DevOps is also characterized by operations staff making use many of the same techniques as developers for their systems work.


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DevOps History In 60 Seconds ITIL, ITSM, ESM, etc. underdeliver in IT from 1989 on Agile comes to the developer world in 2001 Lean comes to the developer world in 2003 (more slowly) O’Reilly Radar “Operations: The New Secret Sauce” in 2006 Agile Infrastructure discussions start in Europe circa 2007 Patrick Debois and Andrew Schafer meet up at Agile 2008 O’Reilly Velocity Conference starts 2008 Velocity 2009, seminal John Allspaw “10+ Deploys Per Day: Dev and Ops Cooperation” presentation Patrick Debois and Kris Buytaert put together first DevOpsDays in Ghent in 2009. Many more follow Lean influences enter DevOps via startup culture Large companies start branding DevOps “solutions”


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Where Do I Start?


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DevOps Concepts DevOps Principles DevOps Practices DevOps Tools


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DevOps Principles The Three Ways Systems Thinking Amplify Feedback Loops Culture of Continual Experimentation CAMS Culture – People > Process > Tools Automation – Infrastructure as Code Measurement – Measure Everything Sharing – Collaboration/Feedback Informed by the values in the Agile Manifesto and Lean Theory of Constraints


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DevOps Practices Version Control For All Automated Testing Proactive Monitoring and Metrics Kanban/Scrum Visible Ops/Change Management Configuration Management Incident Command System Continuous Integration/Deployment/Delivery “Put Developers On Call” Virtualization/Cloud/Containers Toolchain Approach Transparent Uptime/Incident Retrospectives


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An Implementation Model


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Add Ops Into Dev Enhance Service Design With Operational Knowledge Reliability Performance Security Test Them Build Feedback Paths Back from Production Monitoring and metrics Postmortems Foster a Culture of Responsibility Whether your code passes test, gets deployed, and stays up for users is your responsibility – not someone else’s Make Development Better With Ops Productionlike environments Power tooling


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Accelerate Flow To Production Reduce batch size Automated environments mean identical dev/test/prod environments Create safety through automation Continuous Integration/Testing Automated Regression Testing Continuous Delivery Continuous Deployment Feature Flags (A/B testing) Security Testing


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Add Dev Into Ops Don’t do tasks for people. Build tools so they can do their own work. Monitoring/logging/metrics feeds back into dev (and the business) Blameless Incident Postmortems Developers Do Production Support/Empower Ops Acceptance


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Grass Roots Checklist Find ways to collaborate – involve others early Find ways to automate and make self-service Become metrics driven Learn new things, continually improve Understand the larger business goals, metrics, and priorities you support Communicate Work in parallel with small batches Allow refactoring Prove the business value to management


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Management Checklist Experiment – choose a test case as a pilot Then document and spread best practices Empower your teams, but guide their values Metrics are your friend – demand measurable outcomes Don’t accept excuses when the old baseline isn’t good enough Fail fast, continually improve Build on small successes to gain broad support for more substantive change. Align roles and responsibilities across groups –enable collaboration even if it seems “inefficient”


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Things Not To Do Only Token Gestures “Ops team, change your name to DevOps team!” “Put DevOps in those job titles!” Only Implement Tools Changing tools without changing tactics leaves the battlefield strewn with bodies Create More Silos Devalue Operations Or Development Knowledge Anything You’re Not Measuring The Impact Of


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Does It Really Help? 2014 State of DevOps Report (9200 surveyed) measured correlation between high performing organizations and DevOps practice adoption Lead time to changes down MTTR up No alteration in change fail rate


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Core DevOps Research List Gene Kim’s Visible Ops Tom Limoncelli’s The Practice Of Cloud System Administration Gene Kim’s The Phoenix Project (modeled on Goldratt’s The Goal) Jez Humble’s Continuous Delivery Michael Nygard’s Release It! Gene Kim’s The DevOps Cookbook (coming soon-ish) Various Mary and Tom Poppendieck Lean Software Development Books Velocity Conference (velocityconf.com) DevOpsDays Unconferences – There’s one near you! (devopsdays.org) DevOps Weekly newsletter (devopsweekly.com) DevOps Cafe Podcast (devopscafe.com) The Twelve Factor App (12factor.net) The Agile Admin (theagileadmin.com)


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