Mobile app-and-microservices-with-ibm-cloud

1. Srinivasan Nanduri
Architect, Mobile Services, IBM Cloud
@srinivasan_n
Build a mobile app with a microservices backend

2. 2
•Introduction to Microservices Architecture
•Why Mobile Apps are important?
•Lab
Agenda

3. Microservices

4. 4
Monolith
..an architectural style that structures the application as a
single executable unit
• Simple to develop, test & deploy
o At most one technology per layer
• Simple to scale
o Run multiple copies (horizontal
scaling) behind a load balancer
Benefits
Image source: microservices.io

5. 5
Monolith: Problems
• Difficult to achieve operational agility
o Huge and intimidating code base for developers
o Long lead times for releasing new functionality because involves people with all skills coming together
 Redeploy entire unit to change one (sub) component
 Refactoring take minutes, builds take hours, testing in Continuous Integration takes days
o Interrupts long running background (e.g. Quartz) jobs
o Increase risk of failure
• Single development stack - limits right tool for the job
• Convoluted database model
• Scaling is often a challenge
o Running a copy of the whole system is resource-intense
o Doesn’t scale with data out-of-the-box

6. 6
Microservices
..an architectural style where applications are broken into
smaller *autonomous services that work together
• Developed by small engineering teams
• Can be written in any language /
framework
Benefits
*independently developed, run and operated
Trade-off: Complexity
Image source: microservices.io

7. 7
ConceptualTechnicalTeam
One large application
that serves the business
function
Small Independent
autonomous, auto
deployable, domain driven
services of one application
Each service is dependent
on the other
Each service has
independent stack &
de-centralized data
Organization
al
UI Team DBA Team Test Team Build TeamServer Team
Service 3 team
Service 1 team
Cross Functional
Autonomous
Service teams
Embraces pure agile
that is cross functional
Every service team is
small and responsible
end to end.
Monolith vs. Microservices

8. Enablers

9. Docker is a shipping container system for code
MultiplicityofStacksMultiplicityofhardware
environments
QA server
Development
VM
Contributor’s
laptop
Customer Data
Center Production
Cluster
Public Cloud
Static website User DB Analytics DBQueueWeb frontend
Doservicesandapps
interactappropriately?
CanImigratesmoothlyand
quickly
…that can be manipulated using
standard operations and run
consistently on virtually any
hardware platform
An engine that enables any
payload to be encapsulated as
a lightweight, portable, self-
sufficient container…

10. “Kubernetes is an open-source system for
managing containerized applications across
multiple hosts in a cluster. Kubernetes provides
mechanisms for application deployment,
scheduling, updating, maintenance, and
scaling.”
Kubernetes

11. Why mobile apps are important?

12. Lab

13. 13
Scenario

14. 14
Let’s get started!
https://github.com/bloomcode/mobile-app-and-microservices-with-ibm-cloud

15. Thank you