Day 06 Updating Kubernetes Deployments

(1) why do we need to update the Deployment?

• There are mainly two reasons for that,

  1. General upgrades, labels, replicas, metadata etc.

  2. Changing Deployment container image.

• Reference: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/

(2) previously created Deployment.

• Create Deployment

kubectl create -f nginx-deployment.yaml

(3) Different ways to update the deployment.

1. using kubectl set image option.

2. updating deployment YAML file and applying kubect apply -f.

3. using edit deployment.

(1) Using kubectl set image deployment/deployment-name

kubectl set image deployment/nginx-deployment nginx=nginx:1.15.0 --record=true
# Verify Rollout Status 
kubectl rollout status deployment/nginx-deployment

(2) Making changes in (*deployment).yaml file.

• you can change metadata in YAML like replicas, image names etc and apply changes by running kubectl apply -f nginx-deployment.yaml

(3) Using edit deployment

# get deployment
kubectl get deployment

#edit deployment

kubectl edit deployment/nginx-deployment

# edit open in vi editor you can change value in here and save it.
# Verify the same using `kubectl get pods` command.

Made with :heart: by Pratikkumar Panchal