MicroService architecture_&_Kubernetes

1. MicroService Architecture &
Kubernetes
by Akash Agrawal

2. Agenda

3. Agenda
● Understanding MicroService Architecture
○ Traditional 3 Tier Architecture / Monolithic Architecture
○ Problems with Monolithic Architecture
○ MicroService Architecture
○ 12 Factor Applications

4. Agenda
● Understanding Kubernetes & Ecosystem
○ Understanding Containers
○ Understanding Kubernetes
○ Kubernetes Resources/Objects
○ Kubernetes Flow Diagram
○ Kubernetes Cluster Architecture
○ Google Kubernetes Engine (GKE)
○ Istio

5. Agenda
● Kubernetes for MicroService Architecture
○ Combine : MicroService Architecture + Containers + Kubernetes + GKE + Istio

6. About Me

7. About Me
● Google Developer Expert (on Google Cloud Platform Category)
● 11 years of experience in IT Industry
● Worked with various clients like Sabre/Citi Bank/Goldman Sachs/L&T
Infotech etc.
● Currently I work as Independent Consultant (as Technical
Adviser/Architect/Trainer) & Tech Evangelist

8. Understanding MicroService
Architecture

9. Traditional 3 Tier Architecture
● Client Tier / UI
● Server Tier / Business Logic
● Database Tier / Database

10. Problems with 3 Tier Architecture
● Scaling
● Application Uptime
● Team/Component Independence
● ...

11. MicroService Architecture
● MicroService Architecture is focused around decomposing a gient
application into multiple smaller applications.
● Decomposition is generally designed based on 2 factors:
○ Functional Decomposition
○ Technical Decomposition

12. 12 Factor Applications
● Website: https://12factor.net/
● Define the guidelines for building Applications in MicroService Architecture
Codebase Port Binding
Dependencies Concurrency
Config Disposability
Backing Services Dev/Prod Parity
Build/Release/Run Logs
Process Admin Process

13. Understanding Kubernetes &
Ecosystem

14. Understanding Containers
● Container Runtimes : Docker / Rkt etc.
● Package your application/component & it’s dependencies
● Focused around : Build / Ship / Run
○ Build: build container on local laptop manually or automate it through CI/CD Pipeline
○ Ship: ship through Container Registry e.g. Docker Hub/GCR etc.
○ Run: Run anywhere e.g. Cloud/On-Prem etc.

15. Understanding Kubernetes
● Open Source System for Container Orchestration & Handling Containers at
Scale
● Focused around:
○ Scheduling
○ Scaling (Manual / Auto)
○ Self Healing or Auto Repairing
○ ...

16. Kubernetes Resources/Objects
● Pod (Single/Multi Container Pod)
● Service (ClusterIP/NodePort/LoadBalancer)
● Controller Objects:
○ ReplicaSet
○ Deployment
○ StatefulSet
○ Job
○ ...

17. Kubernetes Resources/Objects
● Namespace
● ConfigMap
● Secret
● Label & Selectors

20. Kubernetes Cluster Architecture
● Control Plane
○ Focused around managing Cluster & its State
○ Components:
■ Kube-apiserver
■ Etcd
■ Kube-controller-manager
■ Kube-scheduler

21. Kubernetes Cluster Architecture
● Data Plane
○ Focused around managing individual Nodes & deployed Workloads
○ Components:
■ Kubelet
■ Kube-proxy
■ Container Runtime

22. Google Kubernetes Engine (GKE)
● Managed Solution for Kubernetes on Google Cloud
● Few Features:
○ Cluster Scaling
○ Self Healing or Auto Repairing of Nodes
○ Node Pools : CPU/GPU Pools
○ ...

23. Istio
● Open Source Service Mesh
● Treats Kubernetes as First Class Citizen (but not limited to)

24. Kubernetes for MicroService
Architecture

25. Combine to build MicroService Architecture
based Applications
● MicroService Architecture
● Containers
● Kubernetes
● Google Kubernete Engine (GKE) or other managed solutions
● Istio

26. Akash Agrawal
LinkedIn : akash-agrawal-58a97813
Twitter : @akkiagrawal29
Thanks