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Y U K I TA K E I
A b o u t D e p l o y i n g a n d P ro c e s s
M a n a g e m e n t f o r S l i m a n e
2 0 1 6 J U N 2 7 T O K Y O S E R V E R S I D E S W I F T M E E T U P
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Hello! I’m Yuki Takei
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No content
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• 100% asynchronous(built over libuv)
• Express(Node.js) inspired
• Stand Alone HTTP Server
• Moduler
• Faster
• Adopts Open-Swift
• Supports Multiprocess Environment
Slimane is a Web Framework/HTTP Server for Swift3
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• Routing/Middleware
• Session
• JSON
• Hash Functions
• Redis
• WebSocket
• View/Template Engine
• Promise
• Future
Available functionalities(Modules)
And more…. https://github.com/slimane-swift
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S w i f t y - L i b u v
S U V
S K E LT O N
S L I M A N E
Layer of Slimane
OS
App
libuvͷSwiftόΠϯσΟϯά
ඇಉظωοτϫʔΫϓϥοτϑΥʔϜ
TCPɺUDPɺProcessɺ FIleSystemɺDNS etc…
SuvϕʔεͷHTTPαʔόʔ
HTTPϓϩτίϧͷύʔζ
ΞϓϦέʔγϣϯϑϨʔϜϫʔΫ
system callɺevent loop
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Today I’ll show you a first step of deploying and process
management for Slimane
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Anyways
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How do you deploy your application?
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How do you restart your application?
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• Blue Green Deployment
• Cloud Services provided
• Capistrano(with SCM)
• Rsync
There are some major deploying ways
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Blue Green Deployment (Immutable infrastructure)
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Blue Green Deployment (Immutable infrastructure)
No Down Time!
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Cloud Service Provided
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Cloud Service Provided
No Down Time!(Probably..)
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Capistrano or rsync
access distribute changes
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Capistrano or rsync
access distribute changes
Have to restart
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Capistrano or rsync
access distribute changes
Has Down Time!
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There should not be down time on our services
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So we have to choose Blue Green Deployment or Cloud
services provided one?
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We Should!
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But.. wait
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It’s not necessarily for all projects.
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Should depends on the project size, money, people
and phase
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Well, what should we do?
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Graceful Restart
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access
master
process
child processes(fork)
distribute changes
What is Graceful Restart?
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access
master
process
folk new children (old processes) kill gradually
What is Graceful Restart?
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access
master
process
folk new children (old processes) kill gradually
What is Graceful Restart?
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access
master
process
folk new children kill gradually
No Down Time!
What is Graceful Restart?
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• Nginx
• Apache
• Unicorn(Rack HTTP Server)
• PM2(Node.js)
Major Servers/Tools that supports `Graceful Restart`
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How about Slimane(Swift)?
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• Use via Command line interface
• Controllable by signals
• Observing workers(like a supervisor)
• Can take cpu/memory usage from each workers
• Will merge to Skelton partially (it means Skelton’ll
become like a Unicorn)
PMS is a process manger for apps that are built over Skelton
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(But super early…)
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Demo
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• USR2 (Gracefully restart all workers)
• USR1 (Reopen log files)
• TTIN (Increase a worker process)
• TTOU (Decrease a worker process)
• INT/TERM(exit immediately)
Supported signals(2016-06-27)
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Thanks!