Flow of Components

Client
  ↓
Service (stable IP)
  ↓
Deployment
  ↓
ReplicaSet (auto managed by Deployment)
  ↓
Pods
  ↓
Containers

Basic Components

Pods

• The smallest deployable unit in Kubernetes.
  • Can be moved, scaled to other nodes.
• Have dynamic IPs.
• Pods share network and storage.
• A pod can contain one or more containers.
  • Except ur container, will have log / monitor containers.
• Unhealthy pods will auto be replaced by Deployments / ReplicaSets.

Nodes

• A node is a machine (virtual or physical).
• Nodes run pods, which in turn run containers
• Each node runs:
  • kubelet (communicates with control plane & ensures pods are running)
  • container runtime (Docker / containerd)
  • kube-proxy (handles networking and service routing)