Problem
When attempting to scale up an HCP vault cluster's size or tier using Terraform HCP provider, you may receive an error similar to the one below.
Error: error updating Vault cluster tier (hcp-vault-poc-vault-cluster): [PATCH /vault/2020-11-25/organizations/{cluster.location.organization_id}/projects/{cluster.location.project_id}/clusters/{cluster.id}][403] Update default &{Code:7 Details:[] Error: Message:}
Solution
Only Admins are able to use the provider to change a cluster’s size or tier, ensure the service principal's attributed role is admin. More details on HCP roles and permissions can be found here.