Presented by Anders Lundsgård & Mattias Järnhäll, Scania

1. DevOps @ Scania
Trust and Some Code
Anders Lundsgård
Mattias Järnhäll
Perforce OnTour - Berlin 16 Sept, 2015

2. I want change! I want stability!

4. Disclaimer #1
The opinions expressed in this presentation and on the following
slides are solely those of the presenters and not necessarily
those of Scania as a whole.

5. Disclaimer #2
Tools are only randomly selected. Scania does not value these
more than those not mentioned…
…except for Perforce 

6. Scania as an IT company
• ~1200 workers (800+400) @ Scania IT
• ~1400 apps (mix of build and bought)
• ~2500 servers (win, Linux, MF, iSeries)
• ~1400 TB data
• Main site -> Södertälje, Sweden
• Regional site -> Sao Paolo, Brazil
• Supports Scania Globally
• Application, infrastructure, EUS

7. Perforce @ Scania
• Perforce customer since 2007
• Disk usage on servers 1.8 TB
• 1000+ users
• 1000+ change lists submitted per day

8. Agile What?
DevOps

9. Limit Work In Progress
CODE
IN PROD
PENDING
CODE
NEW
FEATURES
Customer
Value

10. Why Agile?
65%

11. Waterfall

12. Water-
DevOps
Scrum-Fall

13. Continuous Integration
Quality over
new features
Version
everything
Everyone work on
Main branch
Automation

14. Automation – Deployment Pipeline
Version Control
Pull & Push several
times a day
Continuous
Integration Server
- Build
- Test
- Package
Target Servers
(Dev, Staging, Prod)
Deploy Server
Version Everything
- Code
- Tests
- Configuration
- Database
- Infrastructure

15. Pipeline
Software Delivery Through the Decades
Tests
Code
‘90s ‘00s ‘10s

16. Our DevOps Movement

17. Feature
Team
Feature
Team
Feature
Team
Feature
Team
Integration
OS
Web
Monitoring
Change
Management
Network
Security
IaaT
Infra/
Operations
GUI
Business
Logic
Database
In the past
Database

18. Level 1
Level 2+3
Infrastructure As A Service
Infra/
Operations
Feature
Team
Feature
Team
Feature
Team
Feature
Team
GUI
Business
Logic
Database
Virtual Machine ESB Network Change Management Database Monitoring
Forward

19. Infrastructure As A Service
Infra/
Operations
Feature
Team
Feature
Team
Feature
Team
Feature
Team
GUI
Business
Logic
Database
Virtual Machine Web server Load Balancer Change Management Monitoring
You build it You
run it!
Infrastructure
as code
Cultural Technical

20. ITOps DevOps
Version Control
I need a new web site for
my front end code ”xxx”

21. HW / Virtualization
Storage
Network
Data center
Application Server / Web Server
Database
OS
Services
Services
Services
Services
Services
Services
Services
.NET Java Oracle

22. HW / Virtualization
Storage
Network
Data center
Application Server / Web Server
Database
OS
.NET Java Oracle
Services
Services
Services

23. Flow vs. Resource Optimisation
Ref: The Phoenix Project

24. For Us DevOps is a Must

25. GUI
Database
Infra
Business
Logic
Networking Storage
OS
Integration
Monolith
Service
1
Service
2 Service
5
Service
7
Service
8
Service
10
Service
12
Service
14
Service
3
Service
4
Service
6
Service
9
Service
11
Service
15
Middleware
Service
13
User Interface
Security Monitoring
Even with Continuous Integration.
Fast delivery is hard with 50+
engineers and a large codebase.

26. All Infra
needs
User Interface
Service
1
Service
2 Service
5
Service
7
Service
8
Service
10
Service
12
Service
14
Service
3
Service
4
Service
6
Service
9
Service
11
Service
15
Service
13
Microservices
All Infra
needs
All Infra
needs
All Infra
needs
All Infra
needs
All Infra
needs
All Infra
needs
All Infra
needs
GUI
Database
Infra
Business
Logic
Why Microservices?
1. Autonomous teams
2. Build, Test, Deploy SPEED

27. 11,6

28. Learnings: Dev-to-Dev
• Find end user feedback and try to act on it
• Learn to work on Trunk
• Do not rely on database backup for dev/test
• Never blame bad code
• Ops guys are not pure evil persons
• Avoid “Hero-Based Culture” 

29. Avoid “Hero Based Culture”

30. Recommended Reading
Version Control
http://brentleavesjob.devops.vision

31. When a Real Hero Quits

32. Contact
• Anders Lundsgård
– anders.lunsgard@scania.com
– @anderslundsgard
– github.com/anderslundsgard
• Mattias Järnhäll
– mattias.jarnhall@scania.com