Introduction to cloud application development - Part 4

1. Hello Cloud - 4
GIREESH KUMAR

2. Topics
 IoT (Internet of Things)
 Microsevices

3. IoT

4.  TheInternet of Things (IoT) refers to the ever-growing
network of physical objects that feature an IP address
for internet connectivity, and the communication that occurs
between these objects and other Internet-enabled devices
and systems.

9. IIoT - Industrial Internet of Things

10. Microservices
microservices is a software architecture style in which complex applications
are composed of small, independent processes communicating with each
other using language-agnostic APIs

11. Monolithic Apps
User Accounts
Shopping Cart
Product Catalog
Customer Service

12.  Characteristics
 Large Codebase
 Many Components, no clear ownership
 Long deployment cycles
 Prons
 Single codebase
 Easy to develop/debug/deploy
 Good IDE support
 Easy to scale horizontally (can only scale in an “un-differentiated” manner)
 A Central Ops team can efficiently handle

13. Microservices
Write programs that do one thing and do it well.
Write programs to work together.
 Characteristics
 Many smaller (fine grained), clearly scoped services
 Single Responsibility Principle
 Domain Driven Development
 Bounded Context
 Independently Managed
 Clear ownership for each service

15. Monolithic Architecture
Load Balancer
Monolithic App
Account
Component
Catalog
Component
Recommendation
Component
Customer Service
Component
Database

16. Microservices Architecture
Load Balancer
Account Service Catalog
Service
Recommendation
Service
Customer Service
Service
Catalog
DB
API Gateway
Customer
DB

17. Why ?
 Faster and simpler deployments and rollbacks
 Independent Speed of Delivery (by different teams)
 Right framework/tool/language for each domain
 Recommendation component using Python?, Catalog Service in Java ..
 Greater Resiliency
 Fault Isolation
 Better Availability
 If done right

18. Challenges
 Service Discovery
 Operational Overhead (100s of services; DevOps model absolutely
required)
 Distributed Systems are inherently Complex
N/W Latency, Fault Tolerance, Serialization overhead ..
 Service Interface Versioning, Mismatches?
 Testing (Need the entire ecosystem to test)
 Fan out of Requests -> Increases n/w traffic

19. Assignments
 IoT Use Cases / Ideas
 Best practices in Microservices

20. Next