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
Hand Crafted Artisinal Chef Resources
Search
someara
February 02, 2016
Technology
0
570
Hand Crafted Artisinal Chef Resources
Configuration Management Camp
Ghent Belgium
February 2016
someara
February 02, 2016
Tweet
Share
More Decks by someara
See All by someara
Docker Docker Docker Chef
someara
0
460
Configuration Management Camp 2015
someara
1
550
Cookbook Reusability
someara
0
670
TDI with ChefDK 0.0.1
someara
2
810
Configuration Management 101 @ Scale12x
someara
2
860
Configuration Management 101
someara
3
750
Introduction to Chef - Scale 10x
someara
2
430
Introduction to Chef - NYLUG Jan 2012
someara
2
280
Introduction to Chef - LISA11
someara
10
6.1k
Other Decks in Technology
See All in Technology
Node.js 2025: What's new and what's next
ruyadorno
0
420
アイテムレビュー機能導入からの学びと改善
zozotech
PRO
0
190
Performance Insights 廃止から Database Insights 利用へ/transition-from-performance-insights-to-database-insights
emiki
0
310
『バイトル』CTOが語る! AIネイティブ世代と切り拓くモノづくり組織
dip_tech
PRO
1
130
LLMアプリの地上戦開発計画と運用実践 / 2025.10.15 GPU UNITE 2025
smiyawaki0820
1
640
React19.2のuseEffectEventを追う
maguroalternative
2
500
衛星画像超解像化によって実現する2D, 3D空間情報の即時生成と“AI as a Service”/ Real-time generation spatial data enabled_by satellite image super-resolution
lehupa
0
190
初めてのDatabricks Apps開発
taka_aki
1
150
ガバメントクラウド(AWS)へのデータ移行戦略の立て方【虎の巻】 / 20251011 Mitsutosi Matsuo
shift_evolve
PRO
2
200
HR Force における DWH の併用事例 ~ サービス基盤としての BigQuery / 分析基盤としての Snowflake ~@Cross Data Platforms Meetup #2「BigQueryと愉快な仲間たち」
ryo_suzuki
0
230
防災デジタル分野での官民共創の取り組み (2)DIT/CCとD-CERTについて
ditccsugii
0
310
Azureコストと向き合った、4年半のリアル / Four and a half years of dealing with Azure costs
aeonpeople
1
170
Featured
See All Featured
Writing Fast Ruby
sferik
629
62k
Facilitating Awesome Meetings
lara
56
6.6k
Fireside Chat
paigeccino
40
3.7k
Testing 201, or: Great Expectations
jmmastey
45
7.7k
Art, The Web, and Tiny UX
lynnandtonic
303
21k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
9
910
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.5k
Building an army of robots
kneath
306
46k
How To Stay Up To Date on Web Technology
chriscoyier
791
250k
What's in a price? How to price your products and services
michaelherold
246
12k
The Pragmatic Product Professional
lauravandoore
36
6.9k
The Straight Up "How To Draw Better" Workshop
denniskardys
238
140k
Transcript
Hand Crafted Artisanal Chef Resources
Config Management Camp Ghent, Belgium February 2016
Sean OMeara
[email protected]
@someara
whoami
Part 1
Writing library cookbooks An opinionated workflow Step by step
Step 1 - Disregard dogma “Unit tests first” is a
dirty lie https://flic.kr/p/aTSiXF
Step 2 - Make things up Then work backwards https://flic.kr/p/dXkQ5s
Contrived examples are the best examples
None
Place this off to the side, we will come back
for it later.
Step 3 - Create a cookbook By hand. Be a
wizard. https://flic.kr/p/3mMW6e
mkdir -p ~/src/custom-resources-tutorial cd ~/src/custom-resources-tutorial emacs metadata.rb
None
Step 4 - Embed a test cookbook. By hand. Be
a wizard. Again. https://flic.kr/p/ai36NG
mkdir -p test/cookbooks/my_file_test cd test/cookbooks/my_file_test echo “test cookbook” > README.md
mkdir recipes touch recipes/default.rb emacs metadata.rb
None
Step 5 - Tell Berkshelf about it https://flic.kr/p/k5jmja
cd ~/src/custom-resources-tutorial emacs Berksfile
None
Step 6 - Configure Test Kitchen https://flic.kr/p/r38F5c
emacs .kitchen.yml
None
kitchen test ; echo $?
Step 7 - Save game https://flic.kr/p/6ZJ4G7
cd ~/src/custom-resources-tutorial cp ~/src/chef-cookbooks/docker/.gitignore . cp ~/src/chef-cookbooks/docker/.rubocop.yml .
rubocop -a git init git add . git commit -a
-m 'v0.0.1 - cookbook skeleton' git tag v0.0.1
Step 8 - Use resource in test recipe https://flic.kr/p/8MuUAX
emacs test/cookbooks/my_file_test/recipes/ default.rb
None
kitchen converge ; echo $?
Step 9 - Implement resource https://flic.kr/p/bkVKRb
cd ~/src/custom-resources-tutorial mkdir libraries emacs libraries/my_file.rb
None
kitchen converge ; echo $? kitchen converge ; echo $?
Step 10 - Test for behavior https://i.ytimg.com/vi/1y8Rqvz-Jcg/ maxresdefault.jpgz
mkdir -p test/integration/my_file/inspec emacs -p test/integration/my_file/inspec/ run_spec.rb
None
kitchen verify ; echo $?
Step 11 - Add specs and commit https://flic.kr/p/rrgfZh
cd ~/src/custom-resources-tutorial mkdir spec emacs spec/spec_helper.rb
None
emacs spec/my_file_spec.rb
None
rubocop -a rspec ; echo $? git add . git
commit -a -m “v0.1.0 - my_file resource” git tag v0.1.0
stove 0.1.0
Step 12 - Iterate indefinitely https://flic.kr/p/8Ny8Jt
Congratulations, you have now written one software.
You must now maintain it forever.
muahaha.
None
Part 2
Custom Resources Tips and Tricks
Be explicit https://flic.kr/p/pz1JAo
None
None
None
None
Converge twice during development Use markers for “negative” actions https://flic.kr/p/pqwd5U
None
None
Tests let you refactor with confidence https://flic.kr/p/4WnjM4
None
STAR WIPE
None
Pure Ruby resources https://flic.kr/p/5km2fM
Pure Ruby resources utilize - The Ruby Standard Library -
Chef helper libs (mixlib-shellout) - Ruby gems
None
It might make sense to vendor gems
load_current_value - Runs at converge time - Just before the
action body - Loads desired state values
None
converge_if_changed - Runs if any desired_state: true property differs from
user input - desired_state: false avoids comparison
None
coerce transforms values - Called when property is set -
Called when property is read - Use this to raise errors on bad input
The docker_container resource uses coercion heavily https://github.com/chef-cookbooks/ docker/blob/master/libraries/ docker_container.rb
lazy defaults - Delays evaluation until used - Useful for
calculated values
None
Composite resources https://flic.kr/p/fm58oo
Composite resources - Reuse Chef resources - Actions look like
recipes - Do not use load_current_value
etcd_installation_binary :create
httpd_config_rhel :create
Avoid leaky abstractions https://flic.kr/p/7d1kDc
Resources should be minimalist
Early versions might be simple
None
They rarely stay that way
Iterate and add more features Break down into smaller resources
Use naming semantics to describe strategy
etcd_installation_binary etcd_installation_docker etcd_installation_package etcd_service_manager_docker etcd_service_manager_execute etcd_service_manager_systemd etcd_service_manager_sysvinit etcd_service_manager_upstart
Recycle patterns as they emerge
docker_installation_binary docker_installation_package docker_installation_script docker_service_manager_execute docker_service_manager_systemd docker_service_manager_sysvinit docker_service_manager_upstart
Chef selects defaults with the provider resolution system
…
…
Compose resources Most specific to least specific
None
Enjoy
fin