Unikernels! - Speaker Deck

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Unikernels! … on behalf of a merry crew: Anil Madhavapeddy, Thomas Gazagnaire, David Scott, Thomas Leonard, Richard Mortier, Magnus Skjegstad, David Sheets, Balraj Singh, Jon Crowcroft, Mindy Preston, and many others! PolyConf July 2015 @amirmc Amir Chaudhry

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Overview Unikernels Intro Why I care Deployments / Other work • What they are • Why they matter • Example scenario  (static websites) Unikernels @amirmc

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Overview PM in OCaml Labs (I herd cats) Community for MirageOS (moar cats) I like systems stuff! Background: Physicist, Neuroscientist, CompSci (ish), Startups, BigCo. @amirmc

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Software today… …is an application … @amirmc

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Software today… …is an application … … on top of an Operating System. @amirmc

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Software today… … is built locally… @amirmc

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Software today… … is built locally… … but deployed remotely. @amirmc

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Software today… … needing more tools. @amirmc

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Software today… …is complex! Even though most apps are single-purpose @amirmc

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Complexity is the enemy… More layers -> tricky conﬁg Duplication -> inefﬁciency Large sizes -> long boot times More stuff -> larger attack surface @amirmc

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Why build for clouds as we do for desktops? Can we do better?

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Can we do better? Disentangle applications from the OS Break up OS functionality into modular libraries Link only the system functionality your app needs Target alternative platforms from a single codebase @amirmc

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The Rise of the Unikernel Unikernels are specialised virtual machine images built from a modular stack adding system libraries and conﬁguration to application code Every application is compiled into its own specialised OS that runs on the cloud or embedded devices MirageOS @amirmc

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MirageOS @amirmc

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MirageOS unikernel } @amirmc

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MirageOS unikernel } Familiar development cycle Broad deployment scenarios @amirmc

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MirageOS Unix Develop logic MirageOS System Libs @amirmc

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MirageOS Xen Specialise for deploy… … to multiple environments @amirmc

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So what?

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Example: Static websites (though applicable to any application)

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No content

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@amirmc

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SMALL! @amirmc 8.2MB 102 kloc 2560 kloc ~200MB No extra stuff!

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@amirmc

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@amirmc Pluto just considering areas of the circles :)

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Easy deployment

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Develop Deploy Test Heroku for Unikernels Walkthrough @amirmc …in ~100 lines of code

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Walkthrough

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Heroku for Unikernels General workﬂow @amirmc …in ~100 lines of code Develop Deploy Test

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Deployments @amirmc

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Trade-off (for now) @amirmc

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Why I care @amirmc Empower individuals Distributed personal clouds Resilient, scalable systems

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