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
docker for rubyists
Search
Bryce "BonzoESC" Kerley
October 17, 2017
Programming
0
110
docker for rubyists
miamirb 10/16/2017
Bryce "BonzoESC" Kerley
October 17, 2017
Tweet
Share
More Decks by Bryce "BonzoESC" Kerley
See All by Bryce "BonzoESC" Kerley
Ruby in 2020
bryce
1
110
Rails and the Internet of Things
bryce
1
72
It's Not Ruby, But…
bryce
0
49
Ruby 2.5: What's New and What's Cool
bryce
0
63
Would You Like To Make A Game?
bryce
0
55
WebSockets and ActionCable
bryce
0
84
How I Learned to Stop Worrying and Like RSpec
bryce
0
77
How Do Computers Even Work?
bryce
1
190
Growing Distributed Systems: Abril Pro Ruby
bryce
0
52
Other Decks in Programming
See All in Programming
フロントエンド開発のためのブラウザ組み込みAI入門
masashi
5
2.5k
株式会社 Sun terras カンパニーデック
sunterras
0
360
はじめてのDSPy - 言語モデルを『プロンプト』ではなく『プログラミング』するための仕組み
masahiro_nishimi
3
660
CSC305 Lecture 08
javiergs
PRO
0
230
スマホから Youtube Shortsを見られないようにする
lemolatoon
27
33k
釣り地図SNSにおける有料機能の実装
nokonoko1203
0
160
Software Architecture
hschwentner
6
2.3k
デミカツ切り抜きで面倒くさいことはPythonにやらせよう
aokswork3
0
250
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
460
iOSエンジニア向けの英語学習アプリを作る!
yukawashouhei
0
200
テーブル定義書の構造化抽出して、生成AIでDWH分析を試してみた / devio2025tokyo
kasacchiful
0
190
What Spring Developers Should Know About Jakarta EE
ivargrimstad
0
260
Featured
See All Featured
Build your cross-platform service in a week with App Engine
jlugia
232
18k
Measuring & Analyzing Core Web Vitals
bluesmoon
9
620
Art, The Web, and Tiny UX
lynnandtonic
303
21k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
46
7.7k
Leading Effective Engineering Teams in the AI Era
addyosmani
7
470
Making Projects Easy
brettharned
120
6.4k
GraphQLとの向き合い方2022年版
quramy
49
14k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
31
2.7k
Rebuilding a faster, lazier Slack
samanthasiow
84
9.2k
The Art of Programming - Codeland 2020
erikaheidi
56
14k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
657
61k
KATA
mclloyd
PRO
32
15k
Transcript
Docker for Rubyists Miami Ruby Brigade Oct. 16, 2017
Rails in 2005 • Compile Ruby from source • Install
Rubygems separately • Choose your own adventure: • CGI (slow) • FastCGI (quite miserable to set up) • App server (fast, low-grade miserable to set up) • Configure database • Figure out gem dependencies
Rails in 2017 • Choose your own install Ruby adventure
• rbenv • chruby • rvm • PPA • source • Configure database • Install dependencies
Better, Not Great • lotta configuration • need to script
it • ideally dev and prod are same
Configuration Management • Makes setting stuff up repeatable • Good
for production • Less-good for development
Vagrant • Makes setting up a VM repeatable • Good
but slow for development • Less common in production
Docker • Good for development • Good and common in
production • Plenty fast • Lots of work is done
Let's Dockerize Greatjobify
None
Greatjobify • Sinatra • ImageMagick
Greatjobify 1. Pick base image 2. Add OS packages 3.
Create and change to app directory 4. Add Gemfile and Gemfile.lock 5. Bundle 6. Add rest of app 7. Run it
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"]
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"] Base image
None
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"] OS packages
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"] Create and change to app directory
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"] Add Gemfile and Gemfile.lock
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"] Bundle
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"] Add rest of the app
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"] Declare a listening port
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"] Command to run
Dockerfile FROM ruby:2.4.1 RUN apt-get update -qq && \
apt-get install -y build-essential imagemagick RUN mkdir /greatjobify WORKDIR /greatjobify ADD Gemfile* /greatjobify/ RUN bundle install ADD . /greatjobify EXPOSE 9292 CMD ["unicorn", "-p", "9292"]
Building the Image docker build -t greatjobify . Name it
"greatjobify"
None
None
And there it is
Running it docker run --rm -p 9292:9292 -it greatjobify Remove
the instance afterwards Forward instance port 9292 to host port 9292 Keep stdio open and hook it up here The image to run
tfw you don't update your apps more than a couple
times per decade
None
None
External Services greatjobify has an optional dependency on memcache
External Services • Instances can run multiple processes • Instances
should be single-purpose • Horizontal scalability • Orchestrate several instances to work together
Docker Compose "Orchestration"
docker-compose.yml • Describe each instance that you need • base
image or build directory • mounted volumes • dependencies • open ports • commands • environment variables
None
web.rb (snippet) memcache_address = ENV['MEMCACHIER_SERVERS'] || 'localhost:11211' memcache =
[ memcache_address, { username: ENV['MEMCACHIER_USERNAME'] || nil, password: ENV['MEMCACHIER_PASSWORD'] || nil } ] dalli = Dalli::Client.new *memcache use Rack::Cache, :metastore => dalli, :entitystore => dalli
docker-compose.yml • Web service • Build the current directory •
Expose 9292 • Depend on memcached service • Set MEMCACHIER_SERVERS environment variable • Memcached service • Use the "memcached" image
docker-compose.yml version: '3' services: web: build: .
ports: - "9292:9292" depends_on: - memcached environment: - MEMCACHIER_SERVERS=memcached memcached: image: memcached
Running It docker-compose up
None
None
None
None
None
Rails App • Similar to Sinatra • Web process •
Db processes • Support processes • Database console • App console
Docker in Production • Google Container Engine • AWS Elastic
beanstalk • Heroku Container Registry
Docker in Production • Docker Swarm • Kubernetes