This document discusses using Swift for server-side development with Docker and Kitura. It provides an agenda that covers a WWDC 2016 Swift session on server-side development, discusses common backend frameworks, and demonstrates setting up a Kitura project in a VirtualBox virtual machine and building and running a Docker container for the project. Code examples are provided for initializing a Swift package, defining routes and starting a Kitura server.

1. let swift(16)
Docker + Swift Server-Side
OSXDEV.orgByungwook Ahn
OSXDEV.orgWonseok Yang
1

2. 2
Experienced
Device driver(windows, linux)
Media streaming
CDN
Docker
Letswift Conf. 2016 Speaker
Tensorflow-KR 2016 Speaker
PyCon Hongkong 2015 Speaker
PyCon Korea 2015 Speaker

3. 3

4. Agenda
WWDC 2016 - swift session
Server-Side?
Swift backend framework
VirtualBox, Kitura, Docker
myFirstProject
Demo
Summary
4

5. WWDC 2016 - swift session
Swift
What’s New in Swift : https://developer.apple.com/videos/play/wwdc2016/402/
Client-Side
What’s New in Foundation for Swift : https://developer.apple.com/videos/play/wwdc2016/207/
Getting Started with Swift : https://developer.apple.com/videos/play/wwdc2016/404/
Introducing Swift Playgrounds : https://developer.apple.com/videos/play/wwdc2016/408/
Swift API Design Guidelines : https://developer.apple.com/videos/play/wwdc2016/403/
Understanding Swift Performance : https://developer.apple.com/videos/play/wwdc2016/416/
Concurrent Programming With GCD in Swift 3 : https://developer.apple.com/videos/play/
wwdc2016/720/
Using Store Kit for In-App Purchase wit Swift 3 : https://developer.apple.com/videos/play/
wwdc2016/702/
Server-Side
Going Server-side with Swift Open Source : https://developer.apple.com/videos/play/
wwdc2016/415/
Software Engineer
@red
5

6. Server-Side?
Backend Web Framework
Web Framework?
Ajax asynchronous Javascript and XML
MVC framework Model/View/Controller
i18n Internationalization ( ex:date … )
ORM Object Relational Mapping(RDB)
Testing framework Framework JUnit, Cedar…
Security Framework Spring Security(OAuth)
Template Framework Mustache
Caching Framework redis, Ehcache
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7. Kitura Perfect
Hosted IBM perfect.org
latest version v0.20.0 v1.0.0
started date Feb 9, 2016 Oct 3, 2015
License Apache 2.0 Apache 2.0
MySQL O O
SQLite O O
Redis O O
HTTP URL routing O O
Parmeter Parsing O O
JSON O O
OAuth Kitura-Credentials -
Package/3rdParty Library Many ?
Swift backend framework
Most popular Swift backend framework : Zewo,Vapor…

8. let swift(16)
VirtualBox, Kitura, Docker
https://github.com/bwahn/letswift2016-conference
8

9. VirtualBox(vagrantfile)
# -*- mode: ruby -*-
# vi: set ft=ruby :
BOX_URL = 'https://cloud-images.ubuntu.com/vagrant/wily/current/wily-server-cloudimg-amd64-vagrant-
disk1.box'.freeze
SWIFT_PATH = 'https://swift.org/builds/development/ubuntu1510/swift-DEVELOPMENT-
SNAPSHOT-2016-06-06-a'.freeze
SWIFT_DIRECTORY = 'swift-DEVELOPMENT-SNAPSHOT-2016-06-06-a-ubuntu15.10'.freeze
SWIFT_FILE = "#{SWIFT_DIRECTORY}.tar.gz".freeze
SWIFT_HOME = "/home/vagrant/#{SWIFT_DIRECTORY}".freeze
LIBDISPATCH_URL = '-b experimental/foundation https://github.com/apple/swift-corelibs-libdispatch'.freeze
KITURA_URL = 'https://github.com/IBM-Swift/Kitura.git'.freeze
KITURA_BRANCH = 'master'.freeze
Vagrant.configure(2) do |config|
config.vm.box = BOX_URL
config.vm.network 'forwarded_port', guest: 8090, host: 8090
Swift 3.0
For Restful-APIs
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KITURA master

10. ###
# 1. Install compiler, autotools
sudo apt-get --assume-yes install clang
sudo apt-get --assume-yes install autoconf libtool pkg-config
# 2. Install dtrace (to generate provider.h)
sudo apt-get --assume-yes install systemtap-sdt-dev
# 3. Install libdispatch pre-reqs
sudo apt-get --assume-yes install libblocksruntime-dev libkqueue-dev libpthread-
workqueue-dev libbsd-dev
# 4. Kitura packages
sudo apt-get --assume-yes install libhttp-parser-dev libcurl4-openssl-dev libhiredis-dev
Install packages
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11. 11
### Download and install Kitura
git clone #{KITURA_URL} -b #{KITURA_BRANCH}
cd Kitura
swift build -Xcc -fblocks
cd ..
$ vagrant up

12. let swift(16)
myFirstProject

13. 13
$ vagrant ssh
vagrant@vagrant-ubuntu-wily-64: $ mkdir myFirstProject
vagrant@vagrant-ubuntu-wily-64: $ cd myFirstProject
vagrant@vagrant-ubuntu-wily-64: $ swift package init

14. 14
$ vi package.swift
import PackageDescription
let package = Package(
name: "myFirstProject",
dependencies: [
.Package(url: "https://github.com/IBM-Swift/Kitura.git",
majorVersion: 0, minor: 20)
])

15. 15
$ vi Sources/main.swift
import Kitura
let router = Router()
router.get("/") {
request, response, next in
response.send("Hello, World!")
next()
}
Kitura.addHTTPServer(onPort: 8090, with: router)
Kitura.run()
$ swift build -Xcc -fblocks
$ ./build/debug/myFirstProject

16. let swift(16)
For Docker

17. For Docker build
Run a letswift-api server
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18. 18
Docker build
$ git clone https://github.com/bwahn/
letswift2016-conference.git
$ docker build -t swift-api .
Docker run
$ docker run -d -p 8090:8090 --name api
swift-api:latest
image(swift-api:latest)
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
swift-api latest 829e110bd520 3 hours ago 1.524 GB
ibmcom/kitura-ubuntu latest 20cb1052cd2e 2 weeks ago 1.524 GB
ibmcom/swift-ubuntu latest b4daffd2bbaf 2 weeks ago 1.233 GB

19. Virtual Box VM - Ubuntu
$ docker run -d -p 8090 --name api1 swift-api:latest
$ docker run -d -p 8090 --name api2 swift-api:latest
$ docker run -d -p 8090 --name api3 swift-api:latest
…
…
..
macOS
port
8090:8090
? => scale up
$ docker-compose
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20. let swift(16)
Demo : Introduction

21. “I Hate Objective-C” Application
Client : Swift 2.2 ( Cocoa-
touch)
Server : Swift 3 ( Kitura)
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22. Architecture
MySQL
Cloud End-Point
swift backend
swift backend
swift backend
Google Container cluster
Swift App
22

23. Dev/Prod Environment
Virtual Box VM - Ubuntu
(Swift - backend)
google container registry
Swift - Client
Google Cloud Platform
swift backend
swift backend
swift backend
MySQL

24. 24
==================================
Description : get a number of vote
Request: Verb: GET URL: http://letswift-api:8090/vote
Response: HTTP code: 200
Body:
{
"objective-c": 100,
"swift": 100
}
==================================
Description : Increase a vote
Request: Verb: PUT URL: http://letswift-api:8090/votes/objectivec_voted
Request: Verb: PUT URL: http://letswift-api:8090/votes/swift_voted
Response: HTTP code: 200

25. let swift(16)
Let’s vote!
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26. 26
let swift(16)