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The Microservices world in. NET Core and. NET Framework

Massimo Bonanni

massimo.bonanni@microsoft.com

@massimobonanni

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Microservices Architecture

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Traditional application approach Microservices application approach

• A microservice application

segregates functionality into

separate smaller services.

• Scales out by deploying each

service independently with

multiple instances across

servers/VMs

• A traditional application has

most of its functionality within a

few processes that are

componentized with layers and

libraries.

• Scales by cloning the app on

multiple servers/VMs

App 1 App 2App 1

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Stateless services

with

separate stores

• Single monolithic database

• Tiers of specific technologies

Data in Traditional approach Data in Microservices approach

• Graph of interconnected microservices

• State typically scoped to the microservice

• Remote Storage for cold data

Stateful

services

Web presentation

services

Stateless

services

SQL DB

or

No-SQL

Mobile

apps

Web Tier

Services Tier

Data Tier

Monolithic Databases are shared across services.

Each microservice owns its model/data!

SQL

[…]

Database servers are usually the bottleneck

Cache Tier

Cache doesn’t help much for massive data

ingress (Events, IoT, etc.)

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Is a unit of deploy

that can be

independently

versioned, deployed

and scaled

Has a unique name

that can be resolved

Interacts with other

microservices over

well defined interfaces

and protocols like

REST

Remains always

logically consistent in

the presence of

failures

Hosted inside a

container

Developed by a small

engineering team

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Microservices, Docker & .NET

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Official Docker Imageshttps://hub.docker.com

or

Cluster of

Nodes/Hosts

VM

App 1 App 2 My Docker Images

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https://docs.docker.com/swarm/overview/

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https://mesosphere.com/product/

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https://kubernetes.io/

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Service Fabric

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Azure Other CloudsOn-Premise

Data centersDev Box

Service Fabric on

Linux in Azure

Preview

Service Fabric for

Linux

Coming 2017

Service Fabric

Windows SDK

Available

Service Fabric on

Windows in Azure

Available

Service Fabric in

Azure Stack GA

Coming 2017

Service Fabric for

Windows Server

Available

Service Fabric on

Linux in Azure

Available

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60bn events/day

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Orchestrator Description Good for Common

workloads

Azure Service Fabric is a distributed

systems platform that makes it easy

to package, deploy, and manage

scalable and reliable microservices

a) Stateful svc & Actors

b) Microservices based

on plain processes

c) Microservices based

on containers

Docker Swarm is a clustering and

scheduling tool for Docker containers.

With Swarm, IT administrators and

developers can establish and manage

a cluster of Docker nodes as a single

virtual system

Microservices based on

containers

Kubernetes is an open-source platform

for automating deployment, scaling,

and operations of application

containers across clusters of hosts

Microservices based on

containers

As a datacenter operating system,

DC/OS is itself a distributed system, a

cluster manager and a container

platform

Microservices based on

containers (Including other

Linux containers, not just

Docker)

More mature:

Less mature:

More mature:

Less mature:

More mature:

Less mature:

Azure Product

Azure Service Fabric

Azure Container Service Docker Swarm

Service FabricProduction-ready &

Microsoft ecosystem

Mesosphere DC/OS

More mature:

Less mature:

Production-ready &

Linux ecosystem

Easy to get started

Dev/Test and Production

Kubernetes

Production-ready &

Linux ecosystem

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aka.ms/MicroservicesEbook aka.ms/MicroservicesArchitecture

Additional subjects covered in the eBook

Domain Driven Design Patterns• Domain Models (Aggregates, Entity, VO, etc.)• Simplified CQRS

• Dapper MicroORM for queries• Commands and Mediator patter

• Domain Events (within the same microservice)

Microservices• Integration Events (across microservices)• Multi-container docker-compose.yml• Swagger w/ Swashbuckle• Security (Authentication/Authorization) with

tokens from IdentityServer4 wrapping ASP.NET Identity

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dot.net/architecture

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