Workshop/crash course on microservices using docker/kubernetes

Prerequisites

1. docker
2. kubectl
3. minikube

Overview

1. Brief introduction about monolithic / microservice architecture.
2. Intro to docker. The what, how and why.
3. Intro to kubernetes. The what, how and why.

Monolithic / microservice architecture

Let's imagine buidling a enterprise server-side application with the following components:

Monolithic approach architecture:

Microservice approach architecture:

NOTE: The images are not mine, they are from the following page and you can learn more information about the architectures here: Microservices.io

Docker

Docker is a set of platform as a service products that uses OS-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels.

Containerized applications:

Application on VM:

Combined:

Explain the following docker concepts:

• Image (How to build)
• Container (How to run)

Kubernetes

Kubernetes is an open-source container-orchestration system for automating application deployment, scaling, and management.

k8s architecture:

Explain the following k8s concepts:

• Pod
• Deployment
• Service