fix(infra): widen MIG zone set (L4 capacity flaps) - #8
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Pull request overview
Widens the zonal distribution for the model regional MIG to better tolerate zone-local L4 GPU capacity stockouts in us-central1.
Changes:
- Expands
model_zonesdefault from a single zone tous-central1-a/b/cto allow capacity to be found across multiple zones.
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| variable "model_zones" { | ||
| description = "Zones the model MIG may use; spread wide since L4 capacity varies by zone." | ||
| type = list(string) | ||
| default = ["us-central1-c"] # probed 2026-08-12: -a and -b stocked out for L4; MIG retries do not roam zones reliably | ||
| default = ["us-central1-a", "us-central1-b", "us-central1-c"] # L4 stockouts flap zone-to-zone; ANY shape lets MIG chase capacity | ||
| } |
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us-central1-c had capacity during probing but stocked out minutes later. With ANY target shape + 3 zones, the MIG retries wherever capacity appears.