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
540
Cookbook Reusability
someara
0
670
TDI with ChefDK 0.0.1
someara
2
800
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
pprof vs runtime/trace (FlightRecorder)
task4233
0
150
ZOZOのAI活用実践〜社内基盤からサービス応用まで〜
zozotech
PRO
0
160
AIが書いたコードをAIが検証する!自律的なモバイルアプリ開発の実現
henteko
1
330
M5製品で作るポン置きセルラー対応カメラ
sayacom
0
110
KMP の Swift export
kokihirokawa
0
330
PLaMoの事後学習を支える技術 / PFN LLMセミナー
pfn
PRO
9
3.8k
動画データのポテンシャルを引き出す! Databricks と AI活用への奮闘記(現在進行形)
databricksjapan
0
140
AI ReadyなData PlatformとしてのAutonomous Databaseアップデート
oracle4engineer
PRO
0
160
「AI駆動PO」を考えてみる - 作る速さから価値のスループットへ:検査・適応で未来を開発 / AI-driven product owner. scrummat2025
yosuke_nagai
4
550
BirdCLEF+2025 Noir 5位解法紹介
myso
0
190
Trust as Infrastructure
bcantrill
0
310
GopherCon Tour 概略
logica0419
2
170
Featured
See All Featured
Imperfection Machines: The Place of Print at Facebook
scottboms
269
13k
Typedesign – Prime Four
hannesfritz
42
2.8k
Optimising Largest Contentful Paint
csswizardry
37
3.4k
Fantastic passwords and where to find them - at NoRuKo
philnash
52
3.4k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
Reflections from 52 weeks, 52 projects
jeffersonlam
352
21k
A Modern Web Designer's Workflow
chriscoyier
697
190k
A designer walks into a library…
pauljervisheath
209
24k
GitHub's CSS Performance
jonrohan
1032
460k
Done Done
chrislema
185
16k
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
19
1.2k
Rails Girls Zürich Keynote
gr2m
95
14k
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