Create Replicaset in Kubernetes Cluster

Task: 

The Nautilus DevOps team is going to deploy some applications on kubernetes cluster as they are planning to migrate some of their applications there. Recently one of the team members has been assigned a task to write a template as per details mentioned below:

Create a ReplicaSet using nginx image with latest tag only and remember to mention tag i.e nginx:latest and name it as nginx-replicaset.

Labels app should be nginx_app, labels type should be front-end. The container should be named as nginx-container; also make sure replicas counts are 4.

Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.

Solution:

Step 1) Create a yaml file

thor@jump_host /$ cat /tmp/rs.yaml 

apiVersion: apps/v1

kind: ReplicaSet

metadata:

  name: nginx-replicaset

  labels:

    type: front-end

    app: nginx_app

spec:

  replicas: 4

  selector:

    matchLabels:

      type: front-end

      app: nginx_app

  template:

    metadata:

      labels:

        type: front-end

        app: nginx_app

    spec:

      containers:

      - name: nginx-container

        image: nginx:latest

thor@jump_host /$ 

Step 2) Execute the yaml file to create a ReplicaSet

thor@jump_host /$ kubectl create -f /tmp/rs.yaml 

replicaset.apps/nginx-replicaset created