Module upstream 

Upstream pool management module for Sentinel proxy

This module handles upstream server pools, load balancing, health checking, connection pooling, and retry logic with circuit breakers.

Re-exports

pub use adaptive::AdaptiveBalancer;

pub use adaptive::AdaptiveConfig;

pub use consistent_hash::ConsistentHashBalancer;

pub use consistent_hash::ConsistentHashConfig;

pub use health::ActiveHealthChecker;

pub use health::HealthCheckRunner;

pub use inference_health::InferenceHealthCheck;

pub use least_tokens::LeastTokensQueuedBalancer;

pub use least_tokens::LeastTokensQueuedConfig;

pub use least_tokens::LeastTokensQueuedTargetStats;

pub use locality::LocalityAwareBalancer;

pub use locality::LocalityAwareConfig;

pub use maglev::MaglevBalancer;

pub use maglev::MaglevConfig;

pub use p2c::P2cBalancer;

pub use p2c::P2cConfig;

pub use peak_ewma::PeakEwmaBalancer;

pub use peak_ewma::PeakEwmaConfig;

pub use sticky_session::StickySessionBalancer;

pub use sticky_session::StickySessionRuntimeConfig;

pub use subset::SubsetBalancer;

pub use subset::SubsetConfig;

pub use weighted_least_conn::WeightedLeastConnBalancer;

pub use weighted_least_conn::WeightedLeastConnConfig;

Modules

adaptive

consistent_hash

health

Active health checking using Pingora’s HttpHealthCheck

inference_health

Inference-specific health check for LLM backends.

least_tokens

Least Tokens Queued load balancer for inference workloads

locality

Locality-aware load balancer

maglev

Maglev consistent hashing load balancer

p2c

peak_ewma

Peak EWMA load balancer

sticky_session

Cookie-based sticky session load balancer

subset

Deterministic Subsetting load balancer

weighted_least_conn

Weighted Least Connections load balancer

Structs

ConnectionPoolConfig

Connection pool configuration for Pingora’s built-in pooling

HttpVersionOptions

HTTP version configuration for upstream connections

PoolConfigSnapshot

Snapshot of pool configuration for metrics/debugging

PoolStats

Pool statistics

RequestContext

Request context for load balancer decisions

ShadowTarget

Target information for shadow traffic

TargetSelection

Selected upstream target

UpstreamPool

Upstream pool managing multiple backend servers

UpstreamTarget

Internal upstream target representation for load balancers

Traits

LoadBalancer

Load balancer trait for different algorithms