Infrastructure Automation with Chef

• Adam Jacob • Christopher Brown • Joshua Timberman http://www.ﬂickr.com/photos/anotherphotograph/2100904507/sizes/o/

http://www.ﬂickr.com/photos/timyates/2854357446/sizes/l/

• Developers? http://www.ﬂickr.com/photos/timyates/2854357446/sizes/l/

• Developers? • Systems Administrators? http://www.ﬂickr.com/photos/timyates/2854357446/sizes/l/

• Developers? • Systems Administrators? • “Business” People? http://www.ﬂickr.com/photos/timyates/2854357446/sizes/l/

• Developers? • Systems Administrators? • “Business” People? • Executives? http://www.ﬂickr.com/photos/timyates/2854357446/sizes/l/

http://www.brooklynstreetart.com/theBlog/wp-content/uploads/2008/12/swedish_chef_bork-sleeper-cell.jpg

At a High Level... http://www.ﬂickr.com/photos/asten/2159525309/sizes/l/

At a High Level... • A library for conﬁguration management http://www.ﬂickr.com/photos/asten/2159525309/sizes/l/

At a High Level... • A library for configuration management • A configuration management system http://www.flickr.com/photos/asten/2159525309/sizes/l/

At a High Level... • A library for configuration management • A configuration management system • A systems integration platform http://www.flickr.com/photos/asten/2159525309/sizes/l/

At a High Level... • A library for configuration management • A configuration management system • A systems integration platform • An API for your entire Infrastructure http://www.flickr.com/photos/asten/2159525309/sizes/l/

http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

Principles • Idempotent http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

Principles • Idempotent • Reasonability http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

Principles • Idempotent • Reasonability • Sane defaults, easily changed http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

Principles • Idempotent • Reasonability • Sane defaults, easily changed • Hackability http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

Principles • Idempotent • Reasonability • Sane defaults, easily changed • Hackability • TMTOWTDI http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

The world moves pretty fast • Primitives http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

The world moves pretty fast • Primitives • Enable you to solve your problems http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

The world moves pretty fast • Primitives • Enable you to solve your problems • Your best skill is knowing your systems http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

So you better be ready • You need a 3rd generation language http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

So you better be ready • You need a 3rd generation language • You’re already a programmer http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

So you better be ready • You need a 3rd generation language • You’re already a programmer • You’ve just been lied to http://www.ﬂickr.com/photos/gi/518613153/sizes/o/

Chef enables Infrastructure as Code Manage conﬁguration as idempotent Resources. Put them together in Recipes. Track it like source code. Conﬁgure your servers.

Infrastructure as Code is... A technical domain revolving around building and managing infrastructure programmatically http://www.ﬂickr.com/photos/kwerfeldein/2634561264/sizes/o/ Copyright © 2010 Opscode, Inc - All Rights Reserved 11

Philosophy Sidebar

Wax Philosophical • We are craftsmen and artists • You need great brushes and tools • But nobody remembers Gaudi’s hammer http://www.ﬂickr.com/photos/vgm8383/2686128924/sizes/l/

• Can only be measured by the ﬁnal solution http://www.ﬂickr.com/photos/aloshbennett/619307160/sizes/l/

A Resource... Is a declarative description of the state you desire a part of your node to be in. http://www.ﬂickr.com/photos/xiaming/382205902/sizes/l/

A Resource... • Is of a given type. Is a declarative description of the state you desire a part of your node to be in. http://www.ﬂickr.com/photos/xiaming/382205902/sizes/l/

A Resource... • Is of a given type. • Has a name. Is a declarative description of the state you desire a part of your node to be in. http://www.ﬂickr.com/photos/xiaming/382205902/sizes/l/

A Resource... • Is of a given type. • Has a name. • Has attributes. Is a declarative description of the state you desire a part of your node to be in. http://www.ﬂickr.com/photos/xiaming/382205902/sizes/l/

A Resource... • Is of a given type. • Has a name. • Has attributes. • Takes actions to bring the resource to a declared state. Is a declarative description of the state you desire a part of your node to be in. http://www.ﬂickr.com/photos/xiaming/382205902/sizes/l/

A Provider... Knows how to actually perform the actions speciﬁed by a resource. http://www.ﬂickr.com/photos/affableslinky/562950216/

A Provider... Knows how to actually perform the actions speciﬁed by a resource. Apt,Yum, Rubygems, Multiple providers per resource type. Portage, Macports, FreeBSD Ports, etc. http://www.ﬂickr.com/photos/affableslinky/562950216/

A Provider... Knows how to actually perform the actions speciﬁed by a resource. Apt,Yum, Rubygems, Multiple providers per resource type. Portage, Macports, FreeBSD Ports, etc. Can be overridden with the provider attribute on a resource. http://www.ﬂickr.com/photos/affableslinky/562950216/

Resources Platform Provider http://www.ﬂickr.com/photos/acurbelo/2628837104/sizes/o/

A Recipe... Applies resources in the order they are speciﬁed http://www.ﬂickr.com/photos/roadsidepictures/2478953342/sizes/o/

A Recipe... Applies resources in the order they are speciﬁed 1 • Evaluates resources in the order they appear. 2 http://www.ﬂickr.com/photos/roadsidepictures/2478953342/sizes/o/

A Recipe... Applies resources in the order they are speciﬁed • Evaluates resources in the order they appear. 1 2 • Adds each resource object to the Resource Collection http://www.ﬂickr.com/photos/roadsidepictures/2478953342/sizes/o/

A Recipe... Applies resources in the order they are speciﬁed http://www.ﬂickr.com/photos/roadsidepictures/2478953342/sizes/o/

A Recipe... Applies resources in the order they are speciﬁed • Can include other recipes. http://www.ﬂickr.com/photos/roadsidepictures/2478953342/sizes/o/

A Recipe... Applies resources in the order they are speciﬁed • Can include other recipes. • Is just Ruby. http://www.ﬂickr.com/photos/roadsidepictures/2478953342/sizes/o/

Download some cookbooks $ knife cookbook site vendor rails -d INFO: Downloading rails from the cookbooks site at version 0.8.0 ... INFO: Cookbook rails version 0.8.0 successfully vendored! INFO: Downloading apache2 from the cookbooks site at version 0.12.0 ... INFO: Cookbook apache2 version 0.12.0 successfully vendored! INFO: Downloading ruby from the cookbooks site at version 0.7.0 ... INFO: Cookbook ruby version 0.7.0 successfully vendored! Uses the “vendor branch” pattern, so you can make changes and track the upstream Copyright © 2010 Opscode, Inc - All Rights Reserved 61

Launch a new Rails Server $ knife rackspace server create 'role[rails]' $ knife ec2 server create ‘role[rails]’ Or just install Chef on your existing servers Copyright © 2010 Opscode, Inc - All Rights Reserved 66

Marvel at Rails being installed $ knife ssh role:rails ‘gem list | grep rails’ Knife SSH! “Search for all nodes with role rails” Run the following command Executes in parallel Supports screen, tmux, and macterm Copyright © 2010 Opscode, Inc - All Rights Reserved 68

Decide you want Rails 3 instead $ vim cookbooks/rails/default The vendor pattern means that you can just change it, and safely merge any upstream changes later on. Copyright © 2010 Opscode, Inc - All Rights Reserved 69

Run chef and verify $ knife ssh role:rails ‘sudo chef-client && gem list | grep rails’ cook-prod-i78f2e213.opscode.us rails (3.0.0- beta4) Run chef on all the Rails systems Then verify the changes. Copyright © 2010 Opscode, Inc - All Rights Reserved 71

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Infrastructure Automation with Chef

by Adam Jacob on Jun 24, 2010

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Infrastructure Automation with Chef — Presentation Transcript