AWS Resorces in folio-rancher-vpc

Check if possible to reduce number of AZ's in use without resource recreation

In terraform code below we can filter the subnets that we want to use.

data "aws_subnets" "private" {
filter {
name = "vpc-id"
values = [data.aws_vpc.this.id]
}
filter {
name = "availability-zone"
values = ["us-west-2b","us-west-2a"]
}
tags = {
Type : "private"
}
}

If try to update already exist.

If deploy from zero.

Conclusion

We can't update our cluster without recreation. "You can't change which subnets Amazon EKS creates its network interfaces in after your cluster is created. " (source https://docs.aws.amazon.com/eks/latest/userguide/network_reqs.html )