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Replica Set In Kubernetes

In this article, we will discuss the replica set in Kubernetes.

Purpose

In Kubernetes, a ReplicaSet is a controller that ensures a specified number of replica Pods are running at any given time. It is a higher-level abstraction built on top of Kubernetes Pods and is used to guarantee the availability and scalability of a set of identical Pods.

Prerequisite

The first step is to create a pod.

Create A YAML File

The first step is to create a YAML for creating the replica set.

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: my-replicaset
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: my-container
        image: nginx:latest
        ports:
        - containerPort: 80

To create the replica set, execute the following command: -

kubectl apply -f replicaset.yaml

Picture showing the replica set created in kubernetes

Kubectl Get Rs Command

The kubectl get rs command is used to retrieve information about ReplicaSets in a Kubernetes cluster.

Posted By -	Karan Gupta

Posted On -	Wednesday, January 31, 2024

Updated On -	Saturday, February 3, 2024

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