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Microservices with Docker

Monolithic Applications

Business LogicFrontend DB

Single Purpose Components

• Authentication Service

• Caching Service • Search Service

• BLOB• NO SQL• MYSQL• MSSQL

• Authentication API• Accounts API• Inventory API• Shopping cart API

Frontend Business Logic Data Layer

What is a Microservice?

"Microservices is a specialisation of an implementation approach for service-oriented architectures (SOA) used to

build flexible, independently deployable software systems. Services in a

microservice architecture (MSA) are processes that communicate with each other over a network in order to fulfill a

goal."Wikipedia. 2017. Microservices - Wikipedia. [ONLINE] Available at: https://en.wikipedia.org/wiki/Microservices.

Google Trends

Google Trends. 2017. microservices - Google Trends. [ONLINE] Available at: https://trends.google.com/trends/explore?q=microservices.

Advantages of Microservices

• Independent deployments• Independently scalable• Different technology stacks• Frequent releases• Fault isolation• Lower impact for other services

Disadvantages of Microservices

• Increased complexity • Network traffic• Diagnostics• Data consistency• Versioning

Container Management

Network

Infrastructure Infrastructure

Container Host Container Host

Operating System Operating System

Container Runtime Container Runtime

A1 A2 A3 A4 A3

Container Management

Network

Infrastructure Infrastructure

Container Host

Operating System

Container Runtime

A1 A2 A3

Operating System

Scheduler DNS

Load Balancer

Service Discovery

Cache

Responsibilities of a Cluster Manager

• Group similar containers• Health checking of containers• Container auto scaling• Service discovery• Load balancing• Centralized log access

Cluster Managers

• Apache Mesos• Azure Service Fabric• Docker Swarm • Kubernetes• Amazon ECS

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Demo

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Thank You!