Just want to add more pressure to this post. @vulture903 you’re describing our problem exactly. We started a new project a year ago and just this past month or so began testing our workflows. We only ever try to spin up 1 NVIDIA T4 with varying success. Sometimes it works but often times we get the ZONE_RESOURCE_POOL_EXHAUSTED message. We too have tried multi-zone and increasing our CPU/Memory count, but have yet to try reservations.
This does not give us confidence to pursue these GPU type workflows with GCP, especially with the lack of insight into errors, availability.
FWIW we only have ever been approved for 1 GPU for gpu all regions. Even though we have lots of database and storage activity.