Cluster Provisioning fails with the message:
Internal error: failed to fetch instance type, this error usually occurs if the region or the instance type is not found

This is likely because OCM uses GCP custom machine types, for example custom-4-16384 and now the installer is validating machine types per zone (see GetMachineTypeWithZones function), which don't include custom machine types.

See https://cloud.google.com/compute/docs/instances/creating-instance-with-custom-machine-type#gcloud for more details.

4.14

Always

ocm create cluster cluster001 --provider=gcp --ccs=true --region=us-east1 --service-account-file=token.json --version="4.14.0-0.nightly-2023-08-02-102121-nightly" 2.

Cluster installation fails 

Cluster installation succeeds