It's a slide for PyconKR 2015.

1. D O C K E R 를 이 용 하 여 P Y T H O N 개 발 환 경 을
빠 르 게 구 성 하 고 , 백 앤 드 서 비 스 를 탐 색 하 는 기
술 , 실 행 환 경
P Y C O N K R - 2 0 1 5
B Y U N G W O O K A H N
1

2. Who am I
ByungWook Ahn
G+ : https://plus.google.com/+EricAhns
device driver(windows, linux) experienced
media streaming experienced
CDN experienced
docker experienced
Platform Architecture Team, SKPlanet

4. D O C K E R
C O N TA I N E R
D O C K E R - M A C H I N E
D O C K E R - C O M P O S E
S A M P L E A P P A R C H I T E C T U R E
T E S T E N V I R O N M E N T
P E R F O R M A N C E
T O D A Y …

5. h t t p s : / / w w w . d o c k e r . c o m /
B U I L D , S H I P, R U N
A n o p e n p l a t f o r m f o r
d i s t r i b u t e d a p p l i c a t i o n s f o r
d e v e l o p e r s a n d s y s a d m i n s
D O C K E R

6. C O N TA I N E R

7. F R O M u b u n t u
R U N
a p t - g e t u p d a t e & &
a p t - g e t i n s t a l l - y p y t h o n p y t h o n - d e v p y t h o n -
p i p p y t h o n - v i r t u a l e n v & &
r m - r f / v a r / l i b / a p t / l i s t s / *
$ c a t D o c k e r f i l e

8. $ docker build -t=“mypython” . <- image 생성 ( 현재 디렉토리에 있는
Dockerfile을 참조)
$ docker images <- Docker Host의 image 확인
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
mypython latest ecc926c495f8 7 seconds ago 373.6 MB
ubuntu latest 91e54dfb1179 4 days ago 188.4 MB
mysql latest c45e4ba02f47 12 days ago 283.8 MB
python 2.7 e1857ee1f3b5 5 weeks ago 674.4 MB
nginx latest 6886fb5a9b8d 5 weeks ago 132.9 MB
$ docker run -it mypython python <- container 실행
Python 2.7.6 (default, Jun 22 2015, 17:58:13)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
$ docker ps -a <= docker host의 containers print
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b596713d6934 mypython "python" 2 seconds ago Exited (0) 2 seconds ago clever_hypatia

9. Docker Host example
$ top
docker container : ubuntu 2ea
container : ubuntu(nginx)

10. D O C K E R - M A C H I N E
VirtualBox
vmware
Microsoft Hyper-V
SOFTLAYER
openstack
Microsoft Azure
AWS
rackspace
DigitalOcean
create & remove
run
➜ 0 2 - S R C d o c k e r- m a c h i n e l s
N A M E A C T I V E D R I V E R S TAT E U R L S WA R M
d e f a u l t v i r t u a l b o x S t o p p e d
d e v v i r t u a l b o x S t o p p e d
p y c o n k r v i r t u a l b o x S t o p p e d
p y c o n k r 0 2 v i r t u a l b o x S t o p p e d
p y c o n k r 0 3 v i r t u a l b o x S t o p p e d
p y c o n k r 0 4 v i r t u a l b o x S t o p p e d
p y c o n k r 0 5 v i r t u a l b o x S t o p p e d

11. DOCKER-COMPOSE
W E B
D B
$ docker-compose up -d
C O N F I G R AT I O N ?
= > YA M L
$ cat docker-compose.yml
db:
image: mysql
environment:
- MYSQL_ROOT_PASSWORD=hellopython
- MYSQL_DATABASE=shopping_db
ports:
- "3306:3306"
web:
build: ./web_api/
command: python manage.py runserver 0.0.0.0:8000
volumes:
- .:/web_api
ports:
- "8000:8000"
links:
- db:db

12. Sample Application
A N G U L A R
J S O N
P Y T H O N
R E S T A P I
P Y T H O N
R E S T A P I
D B
L O A D
B A L A N C E R
L O A D
B A L A N C E R
A N G U L A R
J S O N

13. A N G U L A R
J S O N
P Y T H O N
R E S T A P I
P Y T H O N
R E S T A P I
D B
L O A D
B A L A N C E R
L O A D
B A L A C E R
A N G U L A R
J S O N
J AVA
R E S T A P I
J AVA
R E S T A P I
G O L A N G
R E S T A P I
G O L A N G
R E S T A P I
R O U T I N G
R E D I S
Restful API…

14. T E S T E N V I R O N M E N T
1 2
Traffic Gen. Server
Dell R620
2.0 GHz/2P/12C
32G
Docker Host.
HP DL380G7
2.13GHz/1P/4C
24GB
load testing tool?
nGrinder/Apache ab/locust.io

15. T E S T E N V I R O N M E N T
$ docker inspect web1
[{
"AppArmorProfile": "",
"Args": [
"-g",
"daemon off;"
],
"Config": {
"AttachStderr": false,
"AttachStdin": false,
"AttachStdout": false,
"Cmd": [
"nginx",
"-g",
"daemon off;"
],
"CpuShares": 1024, =>
"Cpuset": "",
"Domainname": “",
…
…
$ docker inspect web2
[{
"AppArmorProfile": "",
"Args": [
"-g",
"daemon off;"
],
"Config": {
"AttachStderr": false,
"AttachStdin": false,
"AttachStdout": false,
"Cmd": [
"nginx",
"-g",
"daemon off;"
],
"CpuShares": 512, =>
"Cpuset": "",
"Domainname": “",
…
…
$ docker inspect web3
[{
"AppArmorProfile": "",
"Args": [
"-g",
"daemon off;"
],
"Config": {
"AttachStderr": false,
"AttachStdin": false,
"AttachStdout": false,
"Cmd": [
"nginx",
"-g",
"daemon off;"
],
"CpuShares": 512, =>
"Cpuset": "",
"Domainname": “",
…
…
C P U :
5 0 %
C P U :
2 5 %
C P U :
2 5 %

16. T E S T C A S E
web_api_case_01
Django(1.8.3) + djangodb + MySQL 5.6.23
web_api_case_02
Django(1.8.3) + No DB operation
web_api_case_03
Django(1.8.3) + djangodb + PostgreSQL 9.4.4
web_api_case_04
Django(1.8.3) + djangodb + (django-cache-machine) + MySQL 5.6.23
web_api_case_demo
load balancer -> web_api_case_01
http://web_api:8000/shoppling/ APIs를 가진 예로 :

17. N G R I N D E R / A PA C H E A B / L O C U S T. I O
nGrinder : agent 컨테이너 5개 생성하여 테스트
// controller
$ docker run -d -v ~/.ngrinder:/root/.ngrinder --name ngrinder -p 80:80 -p 16001:16001 -p
12000-12009:12000-12009 ngrinder/controller:3.3
// agent
$ docker run -d -e 'CONTROLLER_ADDR=ngrinder:80' --link ngrinder:ngrinder ngrinder/agent:3.3

18. nginx : 1.9.2
index.html, 600 bytes

19. D E M O - C A S E 1 : S A M P L E A P P
settings.py
INSTALLED_APPS = (
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'shopping'
)
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'shopping_db',
'USER': 'root',
'PASSWORD': 'hellopython',
'HOST': 'db',
'PORT': 3306,
}
}

20. S A M P L E A P P
models.py
from django.db import models
class Shopping(models.Model):
product_code = models.TextField()
product_title = models.CharField(max_length=100, verbose_name = "Product name")
product_price = models.IntegerField(default='0', verbose_name = "Product price")
class Meta:
verbose_name = "Product list"
verbose_name_plural = "Favorite lists"

21. S A M P L E A P P
// views.py
def shopping_list(request):
"""
List all code shoppinglists, or create a new shopping.
"""
if request.method == 'GET':
shoppinglists = Shopping.objects.all()
serializer = ShoppingSerializer(shoppinglists, many=True)
return JSONResponse(serializer.data)
// serializers.py
from rest_framework import serializers
from shopping.models import Shopping
class ShoppingSerializer(serializers.ModelSerializer):
class Meta:
model = Shopping
fields = ('product_code', 'product_title', 'product_price')
urls.py
urlpatterns = [
url(r'^shopping/$', views.shopping_list)
]

22. S A M P L E A P P
db:
image: mysql
environment:
- MYSQL_ROOT_PASSWORD=hellopython
- MYSQL_DATABASE=shopping_db
ports:
- "3306:3306"
web:
build: ./web_api/
command: python manage.py runserver 0.0.0.0:8000
volumes:
- .:/web_api
ports:
- "8000:8000"
links:
- db:db

23. demo : case1

24. P E R F O R M A N C E : C A S E 1
P Y T H O N
R E S T A P I
M Y S Q LL O A D T O O L

25. D E M O : C A S E 2
views.py
def shopping_list(request):
"""
List all code shoppinglists, or create a new shopping.
"""
if request.method == 'GET':
return JSONResponse({"product_code":"1005","product_title":"BILLIE GOES TO TOWN
SHOPPER","product_price":28})

26. P E R F O R M A N C E : C A S E 2
P Y T H O N
R E S T A P I
L O A D T O O L

27. N G I N X - G U N I C O R N
web:
restart: always
build: ./web
expose:
- "8000"
volumes:
- /usr/src/app/static
env_file: .env
command: /usr/local/bin/gunicorn docker_django.wsgi:application -w 12 -b :8000
nginx:
restart: always
build: ./nginx/
ports:
- "80:80"
volumes:
- /www/static
volumes_from:
- web
links:
- web:web

28. N G I N X - G U N I C O R N
server {
listen 80;
server_name example.org;
charset utf-8;
location /static {
alias /usr/src/app/static;
}
location / {
proxy_pass http://web:8000;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}

29. N G I N X - G U N I C O R N
gunicorn docker_django.wsgi:application -w 2

30. gunicorn docker_django.wsgi:application -w 12

31. D E M O : C A S E 3
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'shopping_db',
'USER': 'postgres',
'PASSWORD': 'hellopython',
'HOST': 'db',
'PORT': 5432,
}
}

32. web:
build: ./web_api/
command: python manage.py runserver 0.0.0.0:8000
volumes:
- .:/web_api
ports:
- "8000:8000"
links:
- db:db
db:
image: postgres
ports:
- "5432:5432"
environment:
- DB_USER=postgres
- DB_PASS=hellopython
- DB_NAME=shopping_db
D E M O : C A S E 3

33. P E R F O R M A N C E : C A S E 3

34. D E M O : C A S E 4
settings.py
CACHE = {
'default':{
'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
'LOCATION': 'memcached:11211'
}
}
views.py
def shopping_list(request):
"""
List all code shoppinglists, or create a new shopping.
"""
if request.method == 'GET':
data = cache.get('shoppinglists')
if data is None:
shoppinglists = Shopping.objects.all()
serializer = ShoppingSerializer(shoppinglists, many=True)
data = serializer.data
cache.set('shoppinglists', data, 60) # seconds
return JSONResponse(data)

35. db:
image: mysql
environment:
- MYSQL_ROOT_PASSWORD=hellopython
- MYSQL_DATABASE=shopping_db
ports:
- "3306:3306"
memcached:
image: memcached:1.4
ports:
- "11211:11211"
web:
build: ./web_api/
command: python manage.py runserver 0.0.0.0:8000
volumes:
- .:/web_api
ports:
- "8000:8000"
links:
- db:db
- memcached:memcached
D E M O : C A S E 4

36. P E R F O R M A N C E : C A S E 4
P Y T H O N
R E S T A P I
M Y S Q LL O A D T O O L
M E M C A C H E D

37. D E M O
P Y T H O N
R E S T A P I
M Y S Q L
M E M C A C H E D
W E B PA G E
H A P R O X Y
W E B PA G E
W E B PA G E
H A P R O X Y
P Y T H O N
R E S T A P I
P Y T H O N
R E S T A P I

38. web:
restart: always
build: ./web_api/
command: python manage.py runserver 0.0.0.0:8000
volumes:
- .:/web_api
expose:
- "8000"
links:
- db
- memcached
weblb:
restart: always
image: tutum/haproxy
links:
- web
ports:
- "80:80"
environment:
- BACKEND_PORT=8000
db:
image: mysql
environment:
- MYSQL_ROOT_PASSWORD=hellopython
- MYSQL_DATABASE=shopping_db
ports:
- "3306"
memcached:
image: memcached:1.4
ports:
- "11211"
demo-composer.yml
- haproxy
- mysql
- memcached
- python django restframeowork
$ docker-compose build .
$ docker-compose scale web=3
$ docker-compose up -d —no-recreate

39. P E R F O R M A N C E : D E M O

40. demo

41. Thanks : Q&A