Microservice: starting point

Microservice:

starting point!

1

Monolith VS Microservices

2

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API Gateway: Nginx way

Microservice: Starting point

Introduction à Kafka

Monolith architecture

3

Pros

Simpler to develop at first

Deploy as a unit

Cons

Coordination overhead as team

growth

All or nothing deploy

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Microservice architecture

4

Pros

Each unit is simple

Independent scaling

Cons

More sophisticated tooling

Network latencies

Microservices are not dragons!

What to figure out?

6

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What to figure out?

● How to debug?

● How to handle network failures?

● How to perform remote synchronous calls?

● How to perform event based calls?

7

Logs

8

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Logs

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Tid: 1234

RequestId: 1

Principal: µserviceA

Tid: 1234

RequestId: 2

Principal: µserviceA

µService A µService B

µService C

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Logs

10

● Trace any request (In / Out)

● Identify resources

● Logs should be treated as a stream

● Logs should be readable by a machine

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What to figure out?

● How to debug?




11

Remote synchronous calls

12

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µService A REST

APIµService B

Synchronous calls

13

µService A REST

APIµService B

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Synchronous calls

14

● Resilient

● Respect contract

● Postel Law - Robustness

● Security

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What to figure out?

● How to debug?




15

Events

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Events

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µService AEvent

Broker

µService B

µService C

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Events

18

● Low coupling

● Based on facts

● Stateless

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What to figure out?

● How to debug?




19

Tooling

20

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Tooling

● Framework agnostic

● Little code base

● Tested

● Documented

21

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Tooling

22

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Event worker

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Worker

µService

Event

Broker

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Event worker

24

Worker

µService

Event

Broker

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Event worker

25

Worker

µService

Event

Broker

ack

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Conclusion

26

Microservices - todo list● Think

⇒ What are my business specificities

● Prepare

⇒ Make a good tooling

● Build

⇒ Enjoy Microservices!

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27

Microservice: starting point

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