∛ Kubernetes vs Docker 🐳

kubernetes-vs-docker.md

Kubernetes VS Docker

Notes From Youtube Video

• Kubernetes allows you to use your existing Docker configurations and workloads, but tackle complexity issues at scale.

Pure docker approach to deployment for a simple deployment:

• Take applications create containers
• Push to a registry and push
• Spin up containers on server stack

Server Stack - for Docker

• Top Layer - App1 App2 App3 (all scaled out etc)
• docker
• OS (Ubuntu)
• Hardware

Scaling out - We could get more hardware and do the same thing again...

• But what if we scaled
• We need more microservices etc
• Scaling out individual components would be tricky also

So.... We can use an orchestration tool like Kubernetes

• Use existing docker apps
• But orchestrate them, taking advantage of your servers and space.

We have a bunch of worker nodes

• We have one master node - connected to the other worker nodes

3 Advanatages of Kubernetes

• Deployment
  • Define application, resources and restart policies etc - defined as a Kubernetes deployment - as part of the stack.
  • If the app crashes - Kubernetes will recover the application
• Development
  • Deploys load balancers for all microservices
  • Takes advantage of discovery services (Kubernetes Services names are used to communicate between each other)
• Monitoring
  • Kubernetes has great monitoring capabilities in nice UI
  • Open source community has great introspection on Kubernetes (ITSIO for example)