Is there a way to specify a specific instance instead of a pool of instances using `nodeSelector` in Kubernetes?

If not, what would be the best way to provision a Redis Cluster with each node having at least 30GB of memory. Can this be accomplished using the `resources` attribute?

By the way, I'm currently creating 6 pools with 1 instance in each and then specifying that in the config but it doesn't look right:

```
nodeSelector:
  cloud.google.com/gke-nodepool: my-pool-1

```