Support autoscaling the API on GKE - #95
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brianvans (brianvans) merged 13 commits intoAug 17, 2026
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Adds optional Horizontal Pod Autoscaling on GKE using native AutoscalingMetric support. When turned on, the API scales on CPU, event-loop utilization, and mean event-loop delay (same signals we use on AWS ECS), and Prometheus metrics are enabled automatically. Requires GKE 1.35.1+. See https://docs.cloud.google.com/kubernetes-engine/docs/how-to/expose-custom-metrics-autoscaling
…oscaling-api-on-gke
brianvans (brianvans)
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August 4, 2026 16:51
Erik Weathers (erikdw)
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Two small follow-ups. Neither blocks merge.
Integrate GKE API autoscaling with workload isolation pools so each rendered API pool gets its own AutoscalingMetric and HPA when enabled.
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I had to change things up a bit for autoscaling of the isolated API pools that were introduced in #97. See braintrust/examples/google-api-isolation-autoscaling/values.yaml for a minimal example of autoscaling the workload-specific API pools independently |
Better document hard requirement on v2.9.0 for /metrics endpoint
Alexey Soldatchenko (soldatchenko)
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August 17, 2026 17:40
Alexey Soldatchenko (soldatchenko)
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Aug 17, 2026
Kevin Green (KevinGreen)
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Aug 17, 2026
Erik Weathers (erikdw)
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August 18, 2026 00:35
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Adds optional Horizontal Pod Autoscaling on GKE using native AutoscalingMetric support. When turned on, the API scales on CPU, event-loop utilization, and mean event-loop delay (same signals we use on AWS ECS), and Prometheus metrics are enabled automatically. Requires GKE 1.35.1+.
This has a hard requirement on v2.9.0+ of the Braintrust data plane, as this introduced the internal
/metricsendpoint capability.See https://docs.cloud.google.com/kubernetes-engine/docs/how-to/expose-custom-metrics-autoscaling for docs on the GKE preview feature that backs this.