The Wide Range of DevOps

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The wide range of DevOps

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Mitchell Hashimoto @mitchellh

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Vagrant

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— DevOps

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— Memes W ARNING!

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I got into DevOps by accident. (But I love it!)

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Confession: I’m new to this.

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No experience with Rack & Stack.

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I am the Cloud generation.

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More speciﬁcally... I am the bridge.

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I practice DevOps!

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But my devs don’t do ops...

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Is this still DevOps?

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DevOps: A range.

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Based on my experience transitioning to DevOps...

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Vagrant

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2 people to 200 people

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Ops is a black box. Devs do all ops

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Ops is a black box. Devs do all ops The Range Requires More than Ops

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Ops is a black box. Devs do all ops Road to... increased stability. Road to... faster feedback. Road to... cheaper iteration.

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Metrics, metrics, everywhere.

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What does my code do?

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What is the system -wide eﬀect of this change?

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Why is my service slow?

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Ops knows.

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Developers should know, too.

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It should be easy

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Remember, we’re right here now.

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How do we make this easy?

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Graphite + Statsite = —

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That was easy.

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Insight into... performance Insight into... system-wide eﬀect Insight into... ops!

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Document your infrastructure

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“Its easy!”

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“Its easy!” Your request comes in. IPTables lets it pass through because its global traffic on a load balancer. It then hits an SSL terminator which proxies the request back to a level 7 load balancer, which round robins the request to an app server. If its a static file request its served directly off disk otherwise it goes to the actual application process. Now your code is executed. Got it? Ready to learn about service orchestration, response caching, and how the site stays running?

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1. Document your ops.

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Topics... Deploy process Lifecycle of a request How do new servers come online? Coding guidelines for Cookbooks Failures and resolutions (automated or not) Tools guides (htop, lsof, ps, netcat, strace) Development VM internals (Vagrant)

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Remove the Black Box

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2. Company Tech Talks

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Bi-weekly. Short (15 minutes). Deep dives.

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Topics... HAProxy Vagrant Conﬁguration management philosophy On-Call Practices Infrastructure testing and veriﬁcation

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Deeper understanding of technologies in use

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Insight into... architecture Insight into... scalability Insight into... how code is executed Insight into... ops!

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Production-mirror Dev Environments

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Vagrant

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Duplicate eﬀorts for production vs. development?

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Use production ops for development

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Extra eﬀort involved. Big gain.

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Small eﬀect on developer workﬂow.

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Insight into... provisioning Insight into... server evolution Insight into... architecture Insight into... ops!

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DevOps Oﬃce Hours

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Ops can be scary to those new to it.

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What was that?!

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Luckily, we’re friendly.

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Ops oﬃce hours. Dev oﬃce hours.

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A comfortable environment to ask and learn anything.

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Oﬃce hour activities... Architecture explanation Fast Chef tutorial Help with cookbook bugs Teaching how current cookbooks work Code review!

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My Oﬃce Hours: Mondays 3 - 5 PM

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Insight into... anything Provides a safe, comfortable learning environment.

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Automated Infrastructure Tests

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Warning: This ﬁeld is still under heavy development

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Honestly: I don’t trust devs to do ops, right now.

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But... I don’t need to.

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Test that Chef runs complete successfully.

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Run integration tests on top of that.

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My Opinion: “Unit tests” for ops is still too new and doesn’t excite me yet.

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Test at high level... Do the new changes apply cleanly? Can I still load the website? Is it still secure? Do all the interactions with the site still work?

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Can we do better?

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Can we do better? I think so. We need tools.

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Also: Code Review

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Ops engineers verify any non-ops contributions

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Developers are now safe to make their own ops changes.* * Ops supervision still important

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Devs: Go Crazy.

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A strong foundation.

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Powerful insight via metrics.

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Powerful insight via metrics. In-depth documentation.

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Powerful insight via metrics. In-depth documentation. Production-mirror development.

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Powerful insight via metrics. In-depth documentation. Production-mirror development. A safe learning environment.

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Powerful insight via metrics. In-depth documentation. Production-mirror development. A safe learning environment. Infrastructure veriﬁcation.

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Powerful insight via metrics. In-depth documentation. Production-mirror development. A safe learning environment. Infrastructure veriﬁcation. Devs doing Ops.

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Powerful insight via metrics. In-depth documentation. Production-mirror development. A safe learning environment. Infrastructure veriﬁcation. But: This is all DevOps.