Getting ZONE_RESOURCE_POOL_EXHAUSTED on a new GKE private cluster in europe-west4-c when creating a balanced disk

[sharkymcdongles]

I provisioned with Terraform. It uses this version from the addons enable:

gke.gcr.io/gcp-compute-persistent-disk-csi-driver:v1.14.2-gke.4@sha256:4aedc5ae1bc03e11e7ded3d02860b0160ee4d086021e8bec773b2fe4c184a8c0

I try and create a disk without the cluster and it works fine, so I suspect there is a problem with the disk creation via the CSI driver. I also notice that when I try and create a disk in the cluster it exhausts my entire SSD quota for the europe-west4 region, and this seems to me like it just loops through endlessly trying to create disks that never provision until it hits the quota. I don't see any disks anywhere at any stage though, so I suspect it tries somewhere I can't see.

Any ideas? The filestore driver works fine.