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Hello there,
The safest way to do this is to firstly create the new node group with the new instance type t3a.2xlarge. Once the nodes are registered to the cluster and have reached the Ready state, you can then delete the old node group. Before each node is terminated, Amazon EKS sends a signal to drain the Pods from that node. If the Pods haven't drained after a few minutes, Amazon EKS lets Auto Scaling continue the termination of the instance. DaemonSet controller on the control plane immediately replaces missing Pods with new equivalent Pods on new nodes. PVCs automatically becomes available to its Pod as soon as the pod is available on the new nodes.
answered 5 months ago
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