Add support for load balancing #145
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| // Then, fall back to the old routes format (backward compatibility) |
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not sure we really need this, no one is using the old format AFAIK.
| export interface Config<ProviderKey extends string = string> { | ||
| /** @param project: record keys are the project ids */ | ||
| projects: Record<number, Project> | ||
| /** @deprecated Use routingGroups instead */ |
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again, not sure we need deprecation warnings
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Adds support for load balancing and fallback routing with priority and weight-based provider selection. This enables flexible traffic distribution across multiple providers and automatic fallback when providers fail.
New
routingGroupsConfigurationIntroduces a new
routingGroupsconfiguration option that replaces the deprecatedroutesfield. The new format supports two key parameters:priority(optional): Higher priority providers are tried first. If not specified, defaults to the negative index position (0, -1, -2, etc.)weight(optional): Controls traffic distribution among providers with the same priority. If not specified, defaults to 1. Negative weights are normalized to 0.Features
Priority-based Fallback: Providers with higher priority are attempted first. If they fail, the gateway falls back to lower priority providers.
Weighted Load Balancing: Within the same priority level, traffic is distributed probabilistically based on weights using a weighted random sampling algorithm.
Backward Compatibility: The old
routesconfiguration format is still supported and will continue to work without modification.Pydantic AI Gateway Console
We'll update the console to support specifying both a weight and priority for routing group members; the logic from this PR will be used to affect runtime behavior.