According to Sam Newman the author of “Building Microservices”, microservices are a group of small autonomous services that work together and are modelled around a business domain. In this Innovation Session, Kalinga Dissanayake and Azeem Mumtaz from the Platform team give an insight to microservices.

1. December 11th
Microservices
Principles and In Practice

2. Definition
“Small autonomous services
that work together,
modelled around a business domain”
- Sam Newman -
Building Microservices

3. Microservices vs Monolithic services
- Martin Fowler -

4. Microservices vs Monolithic services
- Philip Hauer -
When scaling.

5. Principles of microservices

6. Principle 01
Small Autonomous Services

7. Principle 01 -Small autonomous services that work together
Merchant API
Admin API
Consumer API
Payment API

8. Principle 01 -Small autonomous services that work together
Merchant API
Admin API
Consumer API
Payment API
Small??
Autonomous Services?
Work together

9. Principle 01 -Small autonomous services that work together
Merchant API
Wallet API
Notifications API
Employee Mgt
API
CINCO
Onboarding API Menu Related API
Rewards API

10. Definition
“Small autonomous services
that work together,
modelled around a business domain”
- Sam Newman -
Building Microservices

11. Principle 02
Business Domain Based
Modelling

12. Merchant API
Wallet API
Notifications API
Employee Mgt
API
CINCO
Onboarding API Menu Related API
Rewards API
Principle 02 - Business Domain Based Modelling

13. Principle 03
Culture of Automation

14. Principle 03 - Culture of Automation
Automated Testing
Continuous Delivery
Lot of upfront work for a transition

15. Principle 04
Hide Implementation Details

16. Principle 04 - Hide implementation Details
Merchant API
LEAPSET
DB
PROFILE
DB
Consumer API
Admin API
Payment API
Drastically impacts the
ability to change

17. Principle 04 - Hide implementation Details
Data Level APIs
LEAPSET
DB
PROFILE
DB
Merchant API
Easier said than done,
of course.
Especially for startups
and where time to
market is critical
Authentication
Services
You need to make a
request to get the data.
People who manage
these data level
services can do their
job

18. Decentralization
Principle 05

19. Microservices architecture boasts about autonomy
Microservices architecture optimizes around autonomy
Principle 05 - Decentralization

20. ● Do we still need to rely on another party to create a new server
instances?
○ I know.. I know … checks and balances are required.. that’s fine.
○ Practical issues...shush!
● Do we still rely on another party for deployment?
○ Deserves a separate section on its own - Mr Mumtaz will cover it
● Do we have to communicate to all other teams in the Cake
ecosystem for us to push a release
● Is it a one man show? What happens if “that man” is done and
dusted?
○ One centralized architect? Is he the guru for everything or is to
the team that comes together..Where is brainstorming?
collective decision making? Many brains against one?
● Decentralization does not mean decentralizing everything
Principle 05 - Decentralization

21. Principle 05 - Dumb Pipes
ESB
Merchant API Admin API Payment API IDM Other APIS
Clients
● Should not be domain aware
● Cannot become too smart

22. Principle 06
Consumer First

23. Principle 06 - Consumer First
● Api Blueprint
● Raml
● Swagger
○ Features;
■ Industry Standard - Open API Initiative (OAI) - Has
announced an open governance model around the Swagger
Specification under the Linux Foundation.
■ Largest community and has been around since 2011.
■ Stub generators and Live documentation demo. Can be used
as interactive sandbox
■ Open source 100%
○ Platform Swagger Url
■ https://plat1-api.leapset.com:8343/sandbox/

24. Principle 06 - Consumer First

25. Principle 06 - Consumer First
● Service Discovery tools

26. Principle 07
Isolate Failure
Observe and Debug Failure

27. Principle 07
● Log aggregation tools - make it highly observable.
○ Logstash
○ Just imagine logging into 40 servers to debug issues
● Tools that can be used for monitoring
○ Cacti
○ Nagios
○ Graphite
○ Grafana

28. Principle 07
● AWS Autoscaling
● Correlation Ids

29. Principle 08
Deploy Independently

30. Virtual Machine vs Containers

31. Docker
Docker allows you to package an application with all of its dependencies
into a standardized unit for software development.

32. Docker
● Lightweight
● Open
● Secure
● Accelerate Developer Onboarding
○ Eliminate Environment Inconsistencies
● Easily Share and Collaborate on Applications
○ Ship More Software Faster
○ Portable
○ Fast

33. AWS Elastic Beanstalk
● An AWS Product
● Infrastructure manager
● Reduces management complexity without restricting choice or
control
● Quickly deploy and manage applications in the AWS cloud

34. Demo
Demo

35. Demo
SF ConnectorCAKE
Platform

36. AWS Elastic Beanstalk

37. Do we have a problem?

38. Do we have a problem?

39. Do we have a problem?

40. A Solution
Amazon ECS
Amazon EC2 Container Service

41. Amazon ECS