This document discusses GitLab CI Packer and continuous integration/continuous deployment (CI/CD) practices. It contrasts the traditional "cascade" development model with shorter agile cycles. The key points are that automation, CI/CD for both applications and infrastructure, and a DevOps culture and tools can enable more frequent deployments. CI catches bugs early through automated builds and tests. CD aims for continuous deployment through techniques like blue/green, A/B testing, and canary releases. DevOps reduces team silos and focuses on business outcomes.

1. GitLab CI Packer

2. TIAD Camp MS Cloud Readiness

3. What is it about ?
● Agility vs Cascade
● Continuous integration / Continuous deployment
● DevOps culture
● DevOps tools
● Demo

4. In the old times
● Cascade mode
● Long release cycles
● Big gap between the problem and the solution

5. Agility concepts
2-4 weeks
Test
Discover
Design
Develop
Discover
Design
Develop
Test
Discover
Design
Develop
Test
Discover
Design
Develop
Test
Cascade mode Agile
Long cycle
High risks
Hard to adapt
6-12 months
Low risks
Many short cycles
Easy adoption
VS

6. How is it possible ?
● Automation
● Continuous Integration and deployment
● Do it for apps AND Infrastructure
● Dev/Ops Culture
● Using the right tools for the right purposes

7. Continuous Integration
Repository
Version
Control
System
Source
Code
Continuous
Integration
Feedback
Source
Code
Build
Analyze
Code
Test
Continuous
Integration
Early bug detection and quick fixes

8. Continuous Deployment
“At Instagram, we deploy our backend code 30-50
times a day… whenever engineers commit changes
to master… with no human involvement in most
cases”
- Instagram Engineering

9. CI/CD Advantages
● Staying in “Agile” by moving fast
● Quickly identify bugs
● Always have a stable release ready to be
shipped

10. Some deployments methods
● Blue / Green deployment
● A/B testing
● Canary releases

11. Blue/Green deployment
Router
Current version
New version

12. Blue/Green deployment
Router
Old version
Current version

13. A/B Testing
App logic
Feature A
Feature B
25% of the users can
see/use feature B

14. Canary releases
Router
Current version
New version
All users

15. Canary releases
Router
Current version
New version
95%
5%

16. Canary releases
Router
Current version
New version
All users

17. DevOps Culture
● Focus on the business
● Merge teams and reduce frictions
● Share best practices

18. DevOps culture

19. DevOps culture

20. DevOps tools

21. Target architecture

22. Demo

23. Enjoy the TIAD CAMP !
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