Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Cookbook Reusability
Search
someara
October 02, 2014
Technology
0
650
Cookbook Reusability
Chef Summit 2014
someara
October 02, 2014
Tweet
Share
More Decks by someara
See All by someara
Docker Docker Docker Chef
someara
0
460
Hand Crafted Artisinal Chef Resources
someara
0
560
Configuration Management Camp 2015
someara
1
540
TDI with ChefDK 0.0.1
someara
2
770
Configuration Management 101 @ Scale12x
someara
2
850
Configuration Management 101
someara
3
740
Introduction to Chef - Scale 10x
someara
2
430
Introduction to Chef - NYLUG Jan 2012
someara
2
270
Introduction to Chef - LISA11
someara
10
6.1k
Other Decks in Technology
See All in Technology
KiroでGameDay開催してみよう(準備編)
yuuuuuuu168
1
130
新規案件の立ち上げ専門チームから見たAI駆動開発の始め方
shuyakinjo
0
120
AIエージェントの開発に必須な「コンテキスト・エンジニアリング」とは何か──プロンプト・エンジニアリングとの違いを手がかりに考える
masayamoriofficial
0
380
Android Studio の 新しいAI機能を試してみよう / Try out the new AI features in Android Studio
yanzm
0
270
LLMエージェント時代に適応した開発フロー
hiragram
1
410
EKS Pod Identity における推移的な session tags
z63d
1
200
イオン店舗一覧ページのパフォーマンスチューニング事例 / Performance tuning example for AEON store list page
aeonpeople
2
280
マイクロモビリティシェアサービスを支える プラットフォームアーキテクチャ
grimoh
1
230
Evolution on AI Agent and Beyond - AGI への道のりと、シンギュラリティの3つのシナリオ
masayamoriofficial
0
170
どこで動かすか、誰が動かすか 〜 kintoneのインフラ基盤刷新と運用体制のシフト 〜
ueokande
0
180
第4回 関東Kaggler会 [Training LLMs with Limited VRAM]
tascj
12
1.7k
モダンフロントエンド 開発研修
recruitengineers
PRO
2
320
Featured
See All Featured
Principles of Awesome APIs and How to Build Them.
keavy
126
17k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
110
20k
Making Projects Easy
brettharned
117
6.3k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
283
13k
YesSQL, Process and Tooling at Scale
rocio
173
14k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
26k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Build The Right Thing And Hit Your Dates
maggiecrowley
37
2.8k
Art, The Web, and Tiny UX
lynnandtonic
302
21k
The Cost Of JavaScript in 2023
addyosmani
53
8.8k
Site-Speed That Sticks
csswizardry
10
790
How GitHub (no longer) Works
holman
315
140k
Transcript
Cookbook Reusability! Chef Community Summit 2014
Sean OMeara!
[email protected]
! @someara
whoami
A Year in Review
Diversification
7zip! apache2! ark! application*! couchdb! Imagemagick! java
logrotate! mercurial! munin! nagios! nginx! ntp! openvpn
pacman! postgresql! python! reprepro! rabbitmq! runit! supervisor
selinux! tmux! varnish ! wordpress!
Supermarket https://www.flickr.com/photos/mobilestreetlife/10885044043
• Escaped the tyranny of JIRA! • Moved to Github
Issues! • Automated CLA checking! • OSS Artifact Repository
Rewrites
2009 0.5.2 Chef Vagrant ChefSpec 0.1.0 0.0.2 Minitest-Chef Berkshelf Test
Kitchen 2010 0.9.0 2011 0.10.0 2012 10.12.0 1.0.0 0.2.0 1.0.0 0.7.0 1.0.0 2013 2014 1.0.0 2.0.0 1.0.0 2.0.0 1.4.0 11.0.0 12.0.0 1.6.5 3.0.0 3.0.0 1.2.2 ServerSpec ChefDK 0.0.1 2.0.0 0.2.2 TDI Capability 0.8.0
yum! yum-*! jenkins! mysql! httpd
The Evolution of a Chef Cookbook
Stage 1 - Paradise https://www.flickr.com/photos/nattu/1385100375/
None
test / repair test / repair test / repair
Easy to read Easy to grok Easy to test }
Stage 2 - if statements
logic compiled into resource collection
Resource DSL } Just Ruby }
Resource DSL } Just Ruby } }Chef
Stage 3 - Crazytown https://www.flickr.com/photos/kwl/4595324641
None
wat
Why?
Reusable is useful
Cross-platform is useful
We desire useful things
Platform idioms are hard
Keeping the Dream Alive https://www.flickr.com/photos/kalexanderson/7014655351/
Most people just write their own cookbooks from scratch
I really really really want reusable cross-platform cookbooks
Lessons Learned
Attributes are routinely abused https://www.flickr.com/photos/jabberwocky381/2828863789
None
Attributes are an interface
Attributes are tunable knobs
None
You probably just want a variable
None
Or even a method
None
Using an attribute to track state during a Chef run
causes tears and sorrow
Prefer resource parameters
None
None
Primitives are more useful than opinionated policy
“They’re Just Resources”! ! LWRP is Googleable
Zoom out a level! ! Think about services and runtimes,
not files and processes
Singleton resources are good but confusing. Possibly even dangerous.! !
Multiple instance support is better! ! Cross-platform resources are best
None
BDD / TDD yields high quality cookbooks https://www.flickr.com/photos/glenirah/4376553184
Test Kitchen! ServerSpec / Minitest / Bats! ChefSpec
2009 0.5.2 Chef Vagrant ChefSpec 0.1.0 0.0.2 Minitest-Chef Berkshelf Test
Kitchen 2010 0.9.0 2011 0.10.0 2012 10.12.0 1.0.0 0.2.0 1.0.0 0.7.0 1.0.0 2013 2014 1.0.0 2.0.0 1.0.0 2.0.0 1.4.0 11.0.0 12.0.0 1.6.5 3.0.0 3.0.0 1.2.2 ServerSpec ChefDK 0.0.1 2.0.0 0.2.2 This Slide Again 0.8.0
Full test coverage is tedious
Full test coverage is totally worth it
Let users bring their own configurations
It is better to add to a resource_collection than to
monkey patch it
Configuration files are the brains of a service
Manage minimal configuration to get a service running
Offload further configuration to the user
conf.d is your friend
Hide everything else inside a resource
Add resource parameters when appropriate
None
None
Cross-platform cookbooks are hard https://www.flickr.com/photos/glenirah/4376553184
Cross-platform resources are even harder
They can be done!
Create a resource
None
Create a provider
None
Subclass platform providers
None
None
None
None
None
Set provider default for platforms
None
Do Repeat Yourself
Some resources are often the duplicated across providers
That’s fine. It’s the pattern as a whole that’s important
Maximize for grokability
People will be reading your code for the first time
during operations work
Init systems are annoying
Using a service resource usually requires file or template resources
in addition to service[thingd]
Debconf! Docker! LaunchD! Runit! SMF! Simple! SystemD! Sysvinit! Upstart! Windows
Services
Subclassing is awesome
None
Customize before recipe compilation
Going Forward
Cookbooks that ship resource primitives
More examples to copy
More breaking backwards compatibility (sorry)
Providers implemented with Docker containers (why not?)
chef-metal
Tell me what you think
Please don’t hurt me =)
None