Kubernetes Crash Course

Kubernetes Crash Course for Absolute Beginners

What is Kubernetes?

• open source container ochestration tool
• developed by Google
• helps manage containerized applications in different deployment environments (physical, cloud, hybrid)

Need for container orchestration tool

• trend from monolithic to microservices architecture
  • monolithic: one large application
  • microservices: many small applications
• increased usage of containers

What feastures do orchestration tools provide?

• high availability
  • no downtime
• scalability
  • adjusts to increasing/decreasing load
• disaster recovery
  • backup and restore

Kubernetes Architecture

• cluster
  • made up of nodes
• master node
  • runs important K8s processes
  • manages cluster
  • schedules applications
  • monitors cluster
  • API server
    • entrypoint to K8s cluster
    • validates and processes requests
• worker node
  • runs applications
  • communicates with master node
• kubelet
  • a process that runs on each worker node