Ideas or set of Ideals (New and Old) Which has lead to a common set of practices and patterns DEVOPS (at a high level) Goal of my talk today is to share some of these ideas, practices and patterns
The 2014 State of DEVOPS Report The largest and most comprehensive DEVOPS study to date https://www.flickr.com/photos/80497449@N04/10012162166 The first scientific study of the relationship between Organisational performance, IT performance, DEVOPS practices.
The state of DEVOPS 2014 - http://puppetlabs.com/sites/default/files/2014-state-of-devops-report.pdf • Strong IT performance is a competitive advantage • Strong correlation between DEVOPS practices and IT performance
http://en.wikipedia.org/wiki/Gene_Kim http://en.wikipedia.org/wiki/Gene_Kim#mediaviewer/File:Gene_Kim.jpg Gene Kim “The best just keep getting better and accelerating away from the herd.” Author of the Phoenix project A Novel About IT, DevOps, and Helping Your Business Win
“DEVOPS means [caring] about your job enough to not pass the buck. DEVOPS means [caring] about your job enough to want to learn all the parts and not just your little world. ! Developers need to understand infrastructure. Operations people need to understand code. People need to work with each other and not just occupy space next to each other.” –- John E. Vincent ! https://twitter.com/lusis
Developer Mindset • How are we going to deploy our code? • How are we going to monitor the application in a production environment? • Is this code going to work in a multi node environment? e.g. sessions, caching etc • Software is a thing that exists after it has been written
Development Developers QA Testers Operations Sys Admins Network Engineers DBA Development teams strive for change Operations teams strive for stability misalignment leads to conflict Measured on things like features Measured on things like uptime
• DEVOPS proposes, instead, strategies to create better collaboration between functional silos or doing away with functional silos altogether and creating cross functional teams. better • DEVOPS movement addresses the dysfunction that results from organisations composed of functional silos. Breaking Down the Silos • DEVOPS proposes shared responsibilities and incentives across teams.
“Organisational culture is the behaviour of humans within an organisation and the meaning that people attach to those behaviours.” DEVOPS is Cultural shift
- http://puppetlabs.com/sites/default/files/2014-state-of-devops-report.pdf The state of DEVOPS 2014 Typology of Organisational Culture (Westrum, 2004) Pathological Power-oriented Bureaucratic Rule-oriented Generative Performance-oriented
DEVOPS identifies that organisational culture is important and that this culture is crucial to whether or not DEVOPS will succeed within any given organisation. Takeaway
Increasing collaboration between dev and ops “What is remarkable is that even though agile actively seeks collaboration from all its stakeholders, most agile projects did not extend themselves toward the operations people.” ! ! - Patrick Debois.
Change your definition of done “At the end of each sprint, we must have working and shippable code…” ! “demonstrated in an environment that resembles production”
Practices • Make environments available early in the development process. https://www.vagrantup.com Development environments made easy. Create and configure lightweight, reproducible, and portable development environments. Build, Ship and Run Any App, Anywhere ! Docker - An open platform for distributed applications for developers and sysadmins. OR
Chef Puppet Ansible Salt Configuration management tools (Infrastructure as code) • These tools enable more transparency at the infrastructure level. • Also get developers and operations people collaborating early in the software delivery process Amazon Rackspace Digital Ocean Cloud providers Practices • Make sure devs and ops build code and environments at the same time.
Packer is a tool for creating identical machine images for multiple platforms from a single source configuration. Packer https://www.packer.io • Create a common dev,qa, production environment creation process. Practices
• Collaboration between development and operations starts long before the deployment of software and well afterwards. Practices • Get Operations and Developers sitting together.
Cycle Time • How long does it take you to go from code committed to getting that code running in production? • Asked in another way if you had a critical bug fix and it was one line of code how long does it take you to get that to production.
“What businesses really want of us as software developers is that we allow them to have an idea, get the idea into the hands of our users, figure out if the idea works, and react to the understanding that we can gain from this experiment.” Cycle Time https://leanpub.com/buildqualityin
“High performing organisations deploy code 30 times more often, and 8000 times faster than their peers, deploying multiple times a day, versus an average of once a month.” Key Finding - DEVOPS 2013 Report “Have 50% fewer failures and restore service 12 times faster than their peers.” https://puppetlabs.com/wp-content/uploads/2013/03/2013-state-of-devops-report.pdf
Some problems dev and ops teams face • Cycle time is measured in weeks or months. release • Problems with deployment. • Various bottle necks. Key goals of DEVOPS is to increase flow, reduce cycle time, shorten the feedback loop.
Continuous Delivery Design practice used in software development to automate and improve the process of software delivery. Techniques such as automated testing, continuous integration and continuous deployment Allow software to be developed to a high standard and easily packaged and deployed to environments, resulting in the ability to rapidly, reliably and repeatedly push out enhancements and bug fixes to customers at low risk and with minimal manual overhead. http://en.wikipedia.org/wiki/Continuous_delivery
Key Goals of Continuous Delivery • Software is always in a releasable state throughout its lifecycle. • The only way to categorically prove software is production ready is to deploy it production.
Benefits of deploying more frequently • Smaller changes make it easier to identify problems • Risk of deployment is reduced • The process of fixing problems becomes optimised Devops for developers - Michael Heuttermann
Automated acceptance testing “Automated testing turns fear into boredom” - Eran messeri google. • Automated acceptance testing of functional and non functional requirements. • RSpec tests for your servers configured by Puppet, Chef or anything else. https://github.com/serverspec/serverspec
Deployment pipeline Delivery Team Version Control Check in Feedback Build & unit tests Trigger Automated Acceptance Tests Trigger Feedback Release Approval
• Collaboration • Feedback • Teams can deploy and release any version of their software to any environment at will through a fully automated process. Key objectives of Deployment pipeline - Continuous Delivery: Reliable Software Releases Through Build, Test, and Deployment Automation by Jez Humble and David Farley
Automated Deployments Think of deployment as a two step process • Select environment where we want our software to go. • Push a button to release the software to that environment. Tools Capistrano Rocketeer Deployer - Continuous Delivery: Reliable Software Releases Through Build, Test, and Deployment Automation by Jez Humble and David Farley
Measurement • You can’t improve what you can’t measure. • Measurements are shared not only between developers and ops people but with the entire organisation.
• Code and scripts for building the application. Things that should be in version control for your application • Code and scripts for testing the application. • Code and scripts for deploying the application. • Code and scripts for building environments for the application.
Summary • Why we need DEVOPS • Breaking down Silos • Organisational culture • Increasing Collaboration between Developers and Operations • Cycle Time and Continuous Delivery • Measurement and monitoring • Sharing
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