Deleting and adding subnet from an aws eks cluster

Question

How do I delete a subnet in an eks cluster using the command:
aws eks.......

I need to delete the cluster subnet:
subnet-0b0c38aacba4f47d2

And add the subnet to the cluster:
subnet-093c61d66a8293e85

Answer

Hello,

It is currently not possible to add/delete your subnets that are registered with your EKS cluster. There is an open [feature request](https://github.com/aws/containers-roadmap/issues/170) for this use-case and the EKS team is currently working on it.

Please be advised that you can run worker nodes in any subnets of your VPC, they do not have to be the same ones registered with your EKS cluster. Please refer [EKS subnet considerations](https://docs.aws.amazon.com/eks/latest/userguide/network_reqs.html#network-requirements-subnets) for more info.

Thank you!

Answer

Hello,

Here is a good news. Amazon EKS now allows modification of cluster subnets and security groups. (see [What's new](https://aws.amazon.com/about-aws/whats-new/2023/10/amazon-eks-modification-cluster-subnets-security/))
You can now add or delete subnets from your EKS cluster.

Please note that the subnets passed through an update API call must comprise the same set of AZs as originally passed when creating the cluster.

Best,

Young

Deleting and adding subnet from an aws eks cluster

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