Kubernetes: The Pod Squad (and How to Manage Them All)

ReplicaSet

A replicaSet is a Kubernetes resource that ensures a specified number of identical pod replicas are running at any given time. It is part of Kubernetes’ declarative approach to managing applications.

ReplicaSet is a process that runs multiple instances of Pods. It constantly monitors the status of pods, and if anyone fails or terminates, then it restores by creating a new instance of the pod and deleting the old one.

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: my-replicaset
spec:
  replicas: 3 # Desired number of Pod replicas
  selector:
    matchLabels:
      app: my-app # Label selector for the Pods
  template: # Pod template
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: my-container
        image: nginx:latest
        ports:
        - containerPort: 80

replicas→ The desired number of pods.

selector→ A label selector to identify the pods.

template→ A pod template is used to create the pods.

𝐖𝐡𝐲 𝐔𝐬𝐞 𝐚 𝐑𝐞𝐩𝐥𝐢𝐜𝐚𝐒𝐞𝐭?
✅ Ensures high availability by maintaining a desired number of pods.
✅ Self-healing—Replaces failed or terminated pods automatically.
✅ Works with deployments to manage rolling updates.

Key features

1. Desired State Management: Maintains…