fix: use global endpoint for multi-region locations in Vertex AI #1263
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Multi-region locations (us, eu, asia, europe, me, northamerica,
southamerica, africa) require the global endpoint aiplatform.googleapis.com,
not {location}-aiplatform.googleapis.com which doesn't exist.
This fixes 404 errors when using locations like 'us' or 'eu' with Vertex AI.
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Summary
Multi-region locations (
us,eu,asia,europe,me,northamerica,southamerica,africa) require the global endpointaiplatform.googleapis.com, not{location}-aiplatform.googleapis.com.Problem
When using Vertex AI with multi-region locations like
usoreu, the SDK constructs an invalid URL:This returns an HTML 404 error because
us-aiplatform.googleapis.comdoesn't exist.Current Workaround
Users can work around this by setting the environment variable:
However, this forces all requests to use the global endpoint, which may not be desired for users who want to use specific regional endpoints for data residency or latency reasons.
Solution
The correct URL for multi-region locations uses the global endpoint with the location in the path:
This PR updates
baseUrlFromProjectLocation()to recognize all multi-region locations and route them to the global endpoint, while preserving the existing behavior for regional endpoints likeus-central1,europe-west1, etc.Multi-Region Locations
Per Google Cloud documentation:
globaluseuasiaeuropemenorthamericasouthamericaafricaTest Plan
us-central1,me-central1, etc.) continue to workgemini-2.0-flashmodel