Recreate-deployment

Recreate Deployment Strategy

• Recreate deployment strategy involves the process of terminating all existing running pods before creating new ones.

How it works ?

• Pod Termination: kubernetes terminates all existing pods.
• Pod Creation: It creates new pods with updated configurations.

Pro's	Con's
Application state entirely renewed	Downtime that depends on the both shutdown and boot duration of the application

Note

This deployment strategy is suitable for development environment.

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Prerequisites to try this:

1. EC2 Instance with Ubuntu OS

2. Docker installed & Configured

3. Kind Installed

4. Kubectl Installed

5. Kind Cluster running(Use kind-config.yml file present in this directory.)

Note

You have to go inside root dir of this repo and create Kind Cluster using command: kind create cluster --config kind-config.yml --name dep-strg

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Steps to implement Recreate deployment

• Apply all the manifest files present in the current directory.

  kubectl apply -f .

• Run this command to get all resources created in recreate-ns namespace.

  kubectl get all -n recreate-ns

• Forward the svc port to the EC2 instance port 3000

  kubectl port-forward --address 0.0.0.0 svc/recreate-service 3000:3000 -n recreate-ns &

• Open the inbound rule for port 3000 in that EC2 Instance and check the application at URL:

  http://<Your_Instance_Public_Ip>:3000

• Open a new tab of terminal and connect your EC2 instance and run the watch command to monitor the deployment

  watch kubectl get pods -n recreate-ns

• You have successfully accessed the online_shop with footer webpage. Now edit the deployment file: recreate-deployment.yml and change the image from online_shop to online_shop_without_footer and apply.

  kubectl set image deployment/online-shop online-shop=amitabhdevops/online_shop_without_footer -n recreate-ns
  
  kubectl apply -f . 

• or, You can only apply deployment file

  kubectl apply -f recreate-deployment.yml

• Immediately go to second tab where ran watch command and monitor (It will delete all the pods and then create new ones).

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Cleanup

• Deleting Kind Cluster:

  kind delete cluster --name dep-strg

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Note

If you cannot access the web app after the update, check your terminal — you probably encountered an error like:

error: lost connection to pod

Don’t worry! This happens because we’re running the cluster locally (e.g., with Kind), and the kubectl port-forward session breaks when the underlying pod is replaced during deployment (especially with Recreate strategy).

🔁 Just run the kubectl port-forward command again to re-establish the connection and access the app in your browser.

✅ This issue won't occur when deploying on managed Kubernetes services like AWS EKS, GKE, or AKS, because in those environments you usually expose services using NodePort, LoadBalancer, or Ingress — not kubectl port-forward.