continuous delivery in the cloud - devconfu 2014
TRANSCRIPT
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CONTINUOUS DELIVERYIN THE CLOUD
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CONTINOUS DELIVERY
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Continuous Integration
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Continuous Deployment
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Continuous Delivery
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It’s all about frequent releases
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John Allspaw: “Ops metametrics” http://slidesha.re/dsSZIr
It’s all about failing fast
It’s all about expanding your horizon
Developer responsibility horizon
•Dude, it compiles!•It works on my machine•All tests pass•QA approved it•It’s working in production
“We don’t know, man, we just don’t know.” The confident Nick of months prior shook now, leading Fred to his cubicle. “We coded the application. We debugged until it compiled without errors. When we run it- core dump!” He threw up his hands, then dropped into his swivel chair. “We’ve been pestering IBM support, but they haven’t been very helpful.”“Well, why would they be?” Fred frowned, pausing at the cube threshold. “I mean, who knows what might be wrong with the code?”“Nothing’s wrong with it. It compiles!”“So? It could still have errors.”Nick swiveled around to face him. “Dude. It compiles.”
«Nothing at facebook is anyone elses problem» - Kent Beck (Is TDD dead –part 3)
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The deployment pipeline
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Test coverage
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http://www.industrieit.com/blog/2012/02/a-practical-guide-to-extending-continuous-integration-to-continuous-delivery/http://jamescrisp.org/2011/05/30/automated-testing-and-the-test-pyramid/
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Blue-green deployment
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Jez Humble: “Continous Delivery” http://www.slideshare.net/jezhumble/continuous-delivery-5359386
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Blue-green deployment
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Jez Humble: “Continous Delivery” http://www.slideshare.net/jezhumble/continuous-delivery-5359386
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Blue-green deployment
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Jez Humble: “Continous Delivery” http://www.slideshare.net/jezhumble/continuous-delivery-5359386
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Blue-green deployment
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Jez Humble: “Continous Delivery” http://www.slideshare.net/jezhumble/continuous-delivery-5359386
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Canary releasing
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Jez Humble: “Four principles or Low-Risk Software releases” http://www.informit.com/articles/article.aspx?p=1833567
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Listening or polling?
Automated Acceptance Testing
Dedicated VM Azure Development Fabric• Cost
– Spin up before each deploy– Running costs– Close to production
• Fast• Serious bugs
– Run from exact location
