Introduction to microservices Jornada Microservices

Confidentialité:ConfidentielEntreprise
Jornada Summit: Introduction to Microservices

Who am I?
2
Roan Brasil
@roanbrasil
Java Developer at Astek Canada
+ JCP-Member
+ Open Source Contributor
+ Book and blog writer
Speaker

▪ DEFINITION OF MICROSERVICES
▪ MICROSERVICE ARCHITECTURE
▪ TOP Benefits and Drawbacks
▪ Example
▪ TIPS
▪ Message
▪ QUESTIONS ?
SUMMARY
3

A small introduction… before PANGAEA, after PANGAEA
4

A small introduction… Evolution History
5
Modular
Programming
Object-Oriented
Distributed
Objects
Programming
based on
Components
SOA
Service
Oriented
Architecture
REST
Representational
State
Transfer

A small introduction… Granularity of Architectures
6

A small introduction… Monolithics x Microservices Model
7

A small introduction… Load Balancer in Monolithics Model
8

A small introduction… Monolithics Architecture
9

▪ Small Autonomous services, that work together modelled around business
domain.
A small introduction… Sam Newman definition of Microservices
10

▪ "In short, the microservice architectural style [1] is an
approach to developing a single application as a suite of
small services, each running in its own process and
communicating with lightweight mechanisms, often an
HTTP resource API. These services are built around
business capabilities and independently deployable by
fully automated deployment machinery."
A small introduction… Martin Fowler definition of Microservices
11

▪ Jon Eaves, from RealEstate.com.au, told once, that microservice is something
that could be rewritten in two weeks, a rule of thumb that makes sense for
his particular context.
A small introduction… Best definition of Microservices
12

▪ It is a small piece of business domain, (the sub-domain and bounded context)
that is totally independent, and must be done by a Squad in Agile
Environment, deployable anywhere in a private or public Cloud using IAAS,
SAAS or PAAS using often the protocols such as Rest or gRPC in a continuous
integration and continuous delivery.
A small introduction… My definition of Microservices
13

Microservices Ecosystem: Explaining my definition: Business Domain (The
Sub-domain and Bounded Context)
14

Microservices Ecosystem: Explaining my definition: Independent
15
by Martin Fowler Blog

Microservices Ecosystem: Explaining my definition: Independent
16
by Martin Fowler Blog

Microservices Ecosystem: Explaining my definition: Squad in Agile Environment
17
For more information:
https://medium.com/@achardypm/agile-team-organisation-squads-chapters-tribes-and-guilds-80932ace0fdc

Microservices Ecosystem: Explaining my definition: Deployable anywhere
18

LUNCH AND LEARN Introduction to Microservices
Microservices Ecosystem: Explaining my definition: private or public Cloud
19

Microservices Ecosystem: Explaining my definition: IAAS, SAAS, PAAS
20
Furnitures
Plates
Oven
Ingredients
Chef/Cooker
Furnitures
Plates
Oven
Ingredients
Chef/Cooker
Furnitures
Plates
Oven
Ingredients
Chef/Cooker
Furnitures
Plates
Oven
Ingredients
Chef/Cooker
Made at Home
Home Based
Frozen
IaaS
Infrastructure as a Service
Delivered
PaaS
Plataforma as a Service
Restaurant
SaaS
Software as a Service
You manage You do not manage

Microservices Ecosystem: Explaining my definition: Rest or gRPC
21
REST is acronym for REpresentational State Transfer. It is architectural style
for distributed hypermedia systems and was first presented by Roy Fielding in
2000 in his famous dissertation.

Microservices Ecosystem: Explaining my definition: Rest or gRPC
22
gRPC is a modern open source high performance remote procedure call (RPC)
framework that can run in any environment. Initially developed at Google
2015 using HTTP/2 protocol.
https://grpc.io/
https://developers.google.com/protocol-buffers/
message Person {
required string name = 1;
required int32 id = 2;
optional string email = 3;
}
Person.proto
Person john = Person.newBuilder()
.setId(1234)
.setName("John Doe")
.setEmail("jdoe@example.com")
.build();
output = new
FileOutputStream(args[0]);
john.writeTo(output);
Main.class

Microservices Ecosystem: Explaining my definition: CI / CD
23

24

25

Microservices Architectures
26
User Front-End API Gateway
Microservices Role-Authorization
Microservice B (Java)
Microservice A (Go)
Cloud

27

28

Microservices: TOP Benefits and Drawbacks
29
Benefits Drawbacks
Smaller and faster deployments Harder to test and monitor because of
complexity of the architecture
Easy of understanding Debugging problems can be harder
Better Scalability
Communication between services is
complex (networking latency, message
processing)
Faster time to market
Security implementation is more complex
than a Monolithic (inter-service
communication)
Isolated services have better fault
tolerance
Require Cultural Change (mature agile
and DevOps culture)
Platform and language agnostics services Hard to maintain with a small team

Example Spring Boot
30

Example Spring Boot
31

Example Spring Boot
32

▪ 12 Factor :
→ https://12factor.net/
▪ Microservices Pattern:
→ https://microservices.io/
▪ Cloud Native Computing Native:
→ https://www.cncf.io/
→ https://www.landscape.cncf.io/
▪ Martin Fowler Blog:
→ https://martinfowler.com/
Jornada SUmmit: Introduction to Microservices
Great Tips for Starting Microservices
33

Great Book for Starting Microservices
34

Tips for Tools
35

Tips for Tools
36

MESSAGE
37

Contatos
38
@roanbrasil

QUESTIONS
39

Introduction to microservices Jornada Microservices

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