Patterns of Evolution from Monolith to Microservices

on YouTube ↗24m

" summary

Shows step-by-step moves from monolith to event-oriented microservices: build a microservice that first uses an anti-corruption layer instead of a DB, then add a DB and an event retrofit to sync; roll traffic with canary releases via a load balancer; extract services by change frequency using the strangle pattern; add service mesh (Consul) sidecars for mTLS, routing, retries and tracing; implement API composition + parallel calls for queries; use a persistent saga orchestrator (notifications example) or choreography with a message broker; apply CQRS/event sourcing and materialized views.

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" chapters (35)

1. 0:00Intro
2. 0:12Sounds familiar?
3. 1:38What is a microservice?
4. 2:03Defining the limits of each service
5. 2:42Requirements for using microservices
6. 3:27Referred Domain Driven Design concepts
7. 4:02Select a context and a use case
8. 4:36Step 2 - Create the microservice without database
9. 4:46Replace the database with a ACL
10. 5:03Synchronize the monolith and microservice
11. 5:41Canary release
12. 6:00Redirect traffic to the microservice
13. 6:12Increase traffic to the microservice
14. 6:23Stop the traffic to the monolith
15. 6:47Identify key contexts
16. 7:09Replace the contexts one by one
17. 7:26Let's not underestimate the cost of change
18. 8:10A new functionality brings challenges
19. 8:42With the scale the challenges increase
20. 8:59In a microservice
21. 9:21In a complete ecosystem
22. 10:12When to use service mesh?
23. 11:23Step 1 - Create APIs composer
24. 11:54Step 2 - Parallelize and order calls
25. 12:18Unavailability problem with REST
26. 12:45Circuit breaker
27. 13:24Step 1 - Configure the thresholds
28. 13:54Step 2 - Define fallback response
29. 14:24Complete the flow asynchronously
30. 16:19Saga orchestrator
31. 17:44Saga choreography
32. 18:55Comparison
33. 20:45A real example
34. 21:46Trade offs
35. 22:25To keep in mind . Not everything has to be microservices, it is necessary to understand the

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