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feat(ai-load-balancer): add cluster_hash load balancing policy with FNV-1a consistent hashing (#3898)

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Signed-off-by: zat366 <authentic.zhao@gmail.com>
This commit is contained in:
zat366
2026-06-01 10:19:46 +08:00
committed by GitHub
parent c21a38e783
commit 52c99eb27d
5 changed files with 388 additions and 5 deletions
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4
plugins/wasm-go/extensions/ai-load-balancer/main.go
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@@ -8,6 +8,7 @@ import (
"github.com/tidwall/gjson"
"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-load-balancer/cluster_metrics"
"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-load-balancer/cluster_hash"
"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-load-balancer/endpoint_metrics"
"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-load-balancer/global_least_request"
"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-load-balancer/prefix_cache"
@@ -48,6 +49,7 @@ const (
EndpointLoadBalancerType = "endpoint"
// Cluster load balancer policies
MetricsBasedCluster = "cluster_metrics"
ClusterHashCluster = "cluster_hash"
// Endpoint load balancer policies
MetricsBasedEndpoint = "endpoint_metrics"
MetricsBasedEndpointDeprecated = "metrics_based" // Compatible with old configurations, equal to `endpoint_metrics`
@@ -68,6 +70,8 @@ func parseConfig(json gjson.Result, config *Config) error {
switch config.lbPolicy {
case MetricsBasedCluster:
config.lb, err = cluster_metrics.NewClusterEndpointLoadBalancer(json.Get("lb_config"))
case ClusterHashCluster:
config.lb, err = cluster_hash.NewClusterHashLoadBalancer(json.Get("lb_config"))
default:
err = fmt.Errorf("lb_policy %s is not supported", config.lbPolicy)
}