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
480
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
370
Hand Crafted Artisinal Chef Resources
someara
0
480
Configuration Management Camp 2015
someara
1
450
TDI with ChefDK 0.0.1
someara
2
540
Configuration Management 101 @ Scale12x
someara
2
760
Configuration Management 101
someara
3
660
Introduction to Chef - Scale 10x
someara
2
400
Introduction to Chef - NYLUG Jan 2012
someara
2
260
Introduction to Chef - LISA11
someara
10
6.1k
Other Decks in Technology
See All in Technology
頼られるのが大好きな 皆さんへ - 支援相手との期待の合わせ方、突き放し方 -/For_people_who_like_to_be_relied_on
naitosatoshi
1
290
20240725 LLMによるDXのビジョンと、今何からやるべきか @Azure OpenAI Service Dev Day
nrryuya
3
1.1k
成長期に歩みを止めないための創業期の開発文化形成
mayah
6
420
「単なる OAuth 2.0 を認証に使うと、車が通れるほどのどでかいセキュリティー・ホールができる」のか検証してみた
terara
0
380
dxd2024-生成AIに振り回された3か月間の成功と失敗/dxd2024-link-and-motivation
lmi
2
260
推薦システムを本番導入する上で一番優先すべきだったこと~NewsPicks記事推薦機能の改善事例を元に~
morinota
0
120
LLMアプリケーションの評価の実践と課題 ~PharmaXにおける今後の展望~
pharma_x_tech
2
160
エンジニアの生存戦略 〜クラウド潮流の経験から紐解く技術トレンドのメカニズムと乗りこなし方〜
shimy
9
1.9k
セキュリティ研修 Day1【MIXI 24新卒技術研修】
mixi_engineers
PRO
0
150
年間一億円削減した時系列データベースのアーキテクチャ改善~不確実性の高いプロジェクトへの挑戦~
lycorptech_jp
PRO
3
2.9k
What if...? 처음부터 다시 LLM 어플리케이션을 개발한다면
huffon
0
1k
データ分析基盤を作ってみよう~設計編~
nrinetcom
PRO
1
110
Featured
See All Featured
Testing 201, or: Great Expectations
jmmastey
33
6.9k
Visualization
eitanlees
139
14k
Typedesign – Prime Four
hannesfritz
37
2.2k
For a Future-Friendly Web
brad_frost
173
9.2k
Stop Working from a Prison Cell
hatefulcrawdad
266
20k
Product Roadmaps are Hard
iamctodd
PRO
48
10k
Designing for humans not robots
tammielis
247
25k
Web Components: a chance to create the future
zenorocha
307
41k
Intergalactic Javascript Robots from Outer Space
tanoku
266
26k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
245
1.2M
10 Git Anti Patterns You Should be Aware of
lemiorhan
652
58k
We Have a Design System, Now What?
morganepeng
46
7k
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