tom@ifp.io

( DevOps T.T)

20 !

http://www.inside.com.tw/2013/12/20/59-hilarious-but-true-programming-quotes-for-software-developers

orz

• Server•

• ID •

•

Server

: , : Server

, , ISP

- / ( ) / ...

: Server : HA (High Availability)

DRBD + Heartbeat Active-Passive HA

10.0.0.101 10.0.0.102

IP (VIP)10.0.0.100 IP

, (transparent)

* 101/102 IP

DRBD MySQL (samba)

...

: wifi or 4G : , Server/

MySQL Read-only Replica

server server

server, ,

server DRBD + heartbeat

serverRead-only replica

DB

Internet

LAN

ID

(Read/Write)?

: Primary (Active) Write, Secondary (Passive) Read

ID

Django Server(HTTP API Server)

• ( / JPG)•• ( / )• / / •• (Session)•Insnergy •Infographics

• Session, , • ( / RFID ) Session • Session • RFID • ,

serverRead-only replica

DBredis slave

server DRBD + heartbeat

django django-rest-framework

django django-rest-framework django-allauth (social)

only ( )django django-rest-framework

(read-only)

• Server•

• ID •

•

,

AP, 200+ , 10

AP Switch

Router!!!

10.0.0.X

10.0.1.XA/B ( / )

10.0.3.XC ( )

10.0.4.XD ( )

10.0.5.XE ( )

10.0.6.XF ( )

10.0.7.XG ( )

Lab Internal &

+

1 ( ) 2 ( )

x15

(A-G) X (EX2)

IP

ABCDEFG X

EX2 ( )

10.0.X.YX A-G , 1-7

Y , 101 EX2 IP 10.0.5.102

?

orz

DEMO!

• Server•

• ID •

•

ID

: Plug & Play & Portable

1. ( / ) 2. 3. IP ( DHCP),

QR code

Bad Practice: Server IP & Port zeroconf / avahi , subnet

zeroconf / avahi, ID ,

, ID

QR Code ,

ID

QR Code /

:

bug feature request ...

: Auto Update ID

(HTTP API call)

git fetchgit checkout version_tag

redis

ID redis 1. 2. 3.

ID

C2 C

magic packet

IP, heartbeat server

Django (Web Server)

Integration Test redis ID

ID

••• RFID• QR Code• Session ••

• Auto Update • / • Heartbeat••

• (redis / QR)• (QR)• (redis)

• Server•

• ID •

•

?

Server

1. OS: + x2 (ubuntu server)2. HA: DRBD + heartbeat, zfs3. DB: MySQL (replica)4. MQ: redis 5. DNS: Domain 6. Web Server : nginx / Let’s Encrypt / Security Check7. Web App: Python Environment / git / python code8. samba ( )9.

https://www.ssllabs.com/ssltest/

ProductionStagingDev

Development

http://www.webopedia.com/TERM/S/staging_server.html

server

1. dev code, git2. server git code3. transpile (webpack) Babel, JSX, minify etc.4. Django collect static5. reload nginx

ID : Auto Update

, Prototype Auto Update

Auto Update bug GG!!!

ID

1. dev code, git2. server ID machine version 3. ID

Auto Update Auto Update?

: Copy & Paste orz..

BT Sync (Now Resilio)

Server (HTTP API)

• Server•

• ID •

•

? XD

HTTPS

SSL HTTPS

: Wifi WEP

Wifi, (like: HTTPS)

QR code ?

hash checksum

command.reboot.d87a

QR Code?

10.0.0.X

10.0.1.XA ( )

10.0.3.XC ( )

10.0.4.XD ( )

10.0.5.XE ( )

10.0.6.XF ( )

10.0.7.XG ( )

Lab Internal &

+

1 ( ) 2 ( )

x15

+ : XSS / SQL Injection etc.

https://docs.djangoproject.com/ja/1.9/topics/security/

,

Trade-off

Server: , ,

: Server GG? Bottle neck Server

Server: , loosely coupled

: Bottle neck Server , Server

Subnet: ,

: , zeroconf / avahi

MySQL Replica HTTP API Call: , MySQL ,

: Django ,

ID unicast: , , Debug

:

Database ( ) code?DB : , , :

: source control , : ,

UDP TCP?UDP : , , : , TCP : , , : ,

90% , , 90%

(good practices)

, code ... ...

source control ...

coding… 50 ...

...

512 527 90% 501 511 525?

/ Google / Facebook / KKBox / m01( )

Chrome ? Blizzard Agent ?MOD ? KKBox ?

Thank youAny questions?

Scale

C10K problemhttp://www.kegel.com/c10k.html

( )

: — ( ) ( ) — ( ) ( ) — ( ) ( ) — ( )

Jack ( ) , , !

http://www.mobile01.com/topicdetail.php?f=507&t=1955864

Server ?

moment ?or ?

HTTP API Server request ?

request?300 , Server ?

Example: PyCon 2015 Bingo!

, Check

300 & Check: , 15

Cache

CPU I/O?

? scale?

Example: 101 25ms or 200ms

( HTTP request header overhead)

Performance Tuning

Sphinx