The document discusses the considerations of adopting a microservices architecture, weighing factors like module integration costs, development complexity, and deployment independence. It highlights the principles of microservices such as enhanced cohesion, decreased coupling, and the importance of proper service management and orchestration. Ultimately, it poses the critical question of whether to implement microservices based on the outlined factors.

2. To Microservice or Not to
Microservice?

4. Alon Fliess:

10. number of modules
Module
Integration
cost (complexity)
Amount
module
development
Cost (complexity)
Size
Cost

12. small in size messaging enabled bounded by contexts
autonomously developed independently deployable decentralized
automated processes
enhances the cohesion decreases
the coupling

13. MSA Evolution

14. Some principles

15. Consistency
PartitioningAvailability
CAP Theorem

17. Eventual consistency
The sunlight that you see indicates that the sun was still
there eight minutes ago!

18. Remote
Service
Client
CDN
Service
Service
Service
Service
Service
Discovery
Management
API
Gateway
Static
Content
Identity
Provider

19. DB
Service A Service B
https://www.maxpixel.net/Megaphone-Speakers-Announcement-Information-Barker-1019756

20. IIS Apache NGINX
Virtual Machine
Amazon Lambda Azure Functions
Docker Service Fabric Windows Containers

21. Container
Containers
OCI
Container Hub

22. Server
Host OS
Hypervisor
Server
Host OS
Docker Engine
Guest
OS
Guest
OS
Guest
OS
Bins/Libs Bins/Libs Bins/Libs
App A App A’ App B
Bins/Libs Bins/Libs
AppA
AppA’
AppB
AppB’
AppB
AppB’
AppB
AppB’
Containers are isolated,
but share OS and, where
appropriate,
bins/libraries
Bins/Libs

23. 23

24. 24

25.  No more legacy code!!!
25https://en.wikipedia.org/wiki/File:FortranCardPROJ039.agr.jpg

26. Orchestration vs Choreography
26
Shipping
Service
S
h
i
p
Invoice
Service
Pub/Sub
Client
UI
S
h
i
p
e
d
S
h
i
p
e
d
Client
UI
Shipping
Manager
Shipping
Engine
Invoice
Engine
Trackin
g
Service
Tracking
Engine

27. Source: https://istio.io/docs/concepts/what-is-istio/overview.html
Service
package
service 1
Service
package
service 3
Service
package
service 2
Routing Rule resource
Network
Envoy
proxy
Envoy
proxy
Envoy
proxy
Envoy
proxy
Azure
Service Fabric Mesh

28. https://commons.wikimedia.org/wiki/File:Uniquely_stuffed_pasta.jpg
https://www.flickr.com/photos/23126594@N00/455482299/in/photostream/

29. 29http://cdaworldhistory.wikidot.com/europe-faces-revolutions

30. 30https://commons.wikimedia.org/wiki/File:Human_evolution.svg

31. https://commons.wikimedia.org/wiki/File:Super_heavy-lift_launch_vehicles.png

32. 32

33. 33

35. So Should I Do Microservices?