google.golang.org/grpc@v1.72.2/xds/internal/balancer/clusterimpl/config.go (about)

     1  /*
     2   *
     3   * Copyright 2020 gRPC authors.
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   */
    18  
    19  package clusterimpl
    20  
    21  import (
    22  	"encoding/json"
    23  
    24  	internalserviceconfig "google.golang.org/grpc/internal/serviceconfig"
    25  	"google.golang.org/grpc/internal/xds/bootstrap"
    26  	"google.golang.org/grpc/serviceconfig"
    27  )
    28  
    29  // DropConfig contains the category, and drop ratio.
    30  type DropConfig struct {
    31  	Category           string
    32  	RequestsPerMillion uint32
    33  }
    34  
    35  // LBConfig is the balancer config for cluster_impl balancer.
    36  type LBConfig struct {
    37  	serviceconfig.LoadBalancingConfig `json:"-"`
    38  
    39  	Cluster        string `json:"cluster,omitempty"`
    40  	EDSServiceName string `json:"edsServiceName,omitempty"`
    41  	// LoadReportingServer is the LRS server to send load reports to. If not
    42  	// present, load reporting will be disabled.
    43  	LoadReportingServer   *bootstrap.ServerConfig `json:"lrsLoadReportingServer,omitempty"`
    44  	MaxConcurrentRequests *uint32                 `json:"maxConcurrentRequests,omitempty"`
    45  	DropCategories        []DropConfig            `json:"dropCategories,omitempty"`
    46  	// TelemetryLabels are the telemetry Labels associated with this cluster.
    47  	TelemetryLabels map[string]string                     `json:"telemetryLabels,omitempty"`
    48  	ChildPolicy     *internalserviceconfig.BalancerConfig `json:"childPolicy,omitempty"`
    49  }
    50  
    51  func parseConfig(c json.RawMessage) (*LBConfig, error) {
    52  	var cfg LBConfig
    53  	if err := json.Unmarshal(c, &cfg); err != nil {
    54  		return nil, err
    55  	}
    56  	return &cfg, nil
    57  }
    58  
    59  func equalDropCategories(a, b []DropConfig) bool {
    60  	if len(a) != len(b) {
    61  		return false
    62  	}
    63  	for i := range a {
    64  		if a[i] != b[i] {
    65  			return false
    66  		}
    67  	}
    68  	return true
    69  }