DevOps at ACCU 2012

http://shipitsquirrel.github.com/Monday, 30 April 12

DevOps & Infrastructure As Code Gavin Heavyside - ACCU 2012 - 27 April 2012 gavin@heavyside.co.uk @gavinheavysideMonday, 30 April 12

Getting Software Into Production • Deliver value to customers • New features • Bug ﬁxesMonday, 30 April 12

Software Releases • QA cycle • Downtime during deploy • Out-of-hours • Stress • RiskMonday, 30 April 12

“The Cloud” • Virtualisation & Cloud IaaS lowered cost of entry for businesses • No hardware, but still sysadmin tasks • Small companies get big company issuesMonday, 30 April 12

Agile Infrastructure • New technologies iterate fast • Changing platform requirements • Cutting-edge vs tried-and-testedMonday, 30 April 12

Monday, 30 April 12

• www.mydrivesolutions.com • Insurance telematics • Linux, chef, GIS, Ruby, Rails, SQL, NoSQL, AWS, C++Monday, 30 April 12

Monday, 30 April 12

DevOps • Name invented around 2009 • DevOps Days around the world • Making releases easier through collaboration and automationMonday, 30 April 12

Development • Driven by functional requirements • Business needs • Features • Working on desktop OS • Local conﬁguration & settingsMonday, 30 April 12

Operations • Driven by non-functional requirements • Stability • Performance • Monitoring & Alerting • Minimising operational riskMonday, 30 April 12

Monday, 30 April 12

Infrastructure As Code • Repeatability • Automation • Agility • Scalability • Reassurance • Disaster RecoveryMonday, 30 April 12

Infrastructure As Code • “Break the infrastructure down into independent, reusable, network-accessible services. Integrate these services in such a way as to produce the functionality your infrastructure requires” - Adam JacobMonday, 30 April 12

Key Principles • Modularity • Cooperation • Composability • Extensibility • FlexibilityMonday, 30 April 12

Key Principles • Repeatability • Declaration • Abstraction • Idempotence • ConvergenceMonday, 30 April 12

Chef vs Puppet A Battle To The Death?Monday, 30 April 12

Chef • Open-Source Conﬁguration Management • Developed by Opscode • Solo, Server, HostedMonday, 30 April 12

Chef • Scriptable, repeatable systems • Write cookbooks containing recipes • resources, attributes, data bagsMonday, 30 April 12

Cookbooks & Recipes • Cookbooks are the canonical unit of distribution & sharing in Chef • Cookbooks contain • Recipes • Attributes • Templates & FilesMonday, 30 April 12

Attributes • Every node has attributes • Saved on Chef server • Updated each chef-client run • Cookbooks specify default attributes • Override per-role and/or per-nodeMonday, 30 April 12

Roles • Roles contain other roles and recipes • Deﬁne what you want your node to beMonday, 30 April 12

Monday, 30 April 12

Data BagsMonday, 30 April 12

Using a Data BagMonday, 30 April 12

Chef ServerMonday, 30 April 12

Knife • command line tool to interact with Chef • manage cookbooks, roles, data bags • Search nodes • Bootstrap nodes • Plugins to manage cloud serversMonday, 30 April 12

Keeping nodes up to date • Run chef-client as a service • Updated a cookbook? • Applied to all nodes automaticallyMonday, 30 April 12

Test-Driving Infrastructure • http://www.cucumber-chef.org/ • https://github.com/Atalanta/cucumber-chefMonday, 30 April 12

Monday, 30 April 12

Vagrant • http://vagrantup.com • Lightweight, reproducible, portable VMs • Conﬁgure with Puppet, Chef & others • Package boxes for others to useMonday, 30 April 12

Live DemoMonday, 30 April 12

Monday, 30 April 12

NoOps • PaaS • Heroku, Elastic Beanstalk, etcMonday, 30 April 12

Monitoring & Alerting • Nagios, greylog2 etc • Hosted options • #monitoringsucksMonday, 30 April 12

Metrics • “If you can’t measure it, it doesn’t exist” • Track performance • Critical counters • Report against SLAs • Identify problems & bottlenecksMonday, 30 April 12

Metrics • Statsd, GraphiteMonday, 30 April 12

Monday, 30 April 12

CommunicateMonday, 30 April 12

Zero-Downtime Deploys • Deploy updated code • Graceful restarts • Allow existing processes/requests to complete • New requests get processed by updated codeMonday, 30 April 12

Conﬁguration • The conﬁguration of an environment is as important as the code • Settings, values, orderingMonday, 30 April 12

Database Schemas • Make your db migrations non-destructive • Update the schema before deploying codeMonday, 30 April 12

• https://github.com/mydrive/capistrano- deploytags • https://github.com/mydrive/capistrano- detect-migrationsMonday, 30 April 12

Recap • Bridge the gap between dev & ops • Put your infrastructure in source control • De-risk deploys by doing lots of them • Automate everythingMonday, 30 April 12

@gavinheavyside gavin@heavyside.co.ukMonday, 30 April 12

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DevOps at ACCU 2012

by Gavin Heavyside

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DevOps at ACCU 2012 Presentation Transcript