What distinguishes a rollout restart from killing a pod?

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Rollout restart and killing a pod are similar in that they both result in terminating a running pod in a Kubernetes cluster. However, there are some differences between the two:

1. Purpose: Rollout restart is typically used to update the deployment configuration or redeploy the same version of the application, while killing a pod is used to troubleshoot a specific issue with a pod or restart it for other reasons.

2. Control: Rollout restart is a controlled mechanism for managing the state of a deployment, while killing a pod is a more manual process that requires intervention from an administrator or other user.

3. Impact: Killing a pod will immediately terminate the container running within it and disrupt any ongoing operations that rely on that container. Rollout restart, on the other hand, is designed to minimize disruptions by gracefully transitioning traffic to new pods as they become available.

4. Scope: Killing a pod affects only the pod that is terminated, while rollout restart applies to all pods managed by the deployment.

In summary, rollout restart is a more controlled and automated approach to managing the state of a deployment, while killing a pod is a more manual approach used for more specific use cases.