Kubernetes Concepts

• Kubernetes enables you to run your application on computer nodes as if those nodes were a single computer.

• It abstract the underlying infrastructure, thus, simplifying development, deployment and management.

• It can be thought of as an operating system for the cluster.

• It relieves the application developer from implementing certain infrastructure-related services into their apps. At the same time, it allows the application developer to take advantage of features provided by a cloud-native platform in a standardised manner.

• Some of the features that Kubernetes provides are centralised configuration, service discovery, scaling, load-balancing, self-healing and even leader election.

• How Kubernetes works
  • Container Isolation
  • Linux Namespaces
  • Limits to Container Portability
  • Kubernetes Runtime Components
• Kubernetes Basics
  • Names and UID
  • minikube profiles
  • Namespace
  • kubeconfig
  • Pods
  • Pod Lifecycle
  • Pod Conditions
• Networking
  • Ingress Types
  • Service object
  • Network Policies
  • Liveness Probe
• Kubernetes Deployments
  • Replication Controller vs Replication Set
  • Replication Controller
  • Replication Set
  • Node Affinity
  • Multi Container Pods
  • Taints & Tollerations
• Label Selectors
  • Equality-based requirements
  • Set-based requirements
  • matchLabel
• Kubernetes Security
  • Authentication
    • Normal Users
    • Service Accounts
    • API Requests
• Volumes
  • Persistent Volumes
  • Persistent Volume Claim
  • Storage Class
  • Stateful Sets

Config Maps & Secrets

Apps can be configured by - passing command line arguments to containers - setting custom environment variables for each container - mounting configuration files into containers

Kubernetes Release History