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Deployments

In this section, we will take a look at kubernetes deployments

Deployment is a kubernetes object.

deployment

How do we create deployment?

    apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: myapp-deployment
      labels:
        app: myapp
        type: front-end
    spec:
     template:
        metadata:
          name: myapp-pod
          labels:
            app: myapp
            type: front-end
        spec:
         containers:
         - name: nginx-container
           image: nginx
     replicas: 3
     selector:
       matchLabels:
        type: front-end
  • Once the file is ready, create the deployment using deployment defination file

    $ kubectl create -f deployment-defination.yaml
    
  • To see the created deployment

    $ kubectl get deployment
    
  • The deployment automatically creates a ReplicaSet. To see the replicasets

    $ kubeclt get replicaset
    
  • The replicasets ultimately creates PODs. To see the PODs

    $ kubectl get pods
    

    deployment1

  • To see the all objects at once

    $ kubectl get all
    

    deployment2

K8s Reference Docs: