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binding.go
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binding.go
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/*
Copyright 2021 The Karmada Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package util
import (
"k8s.io/apimachinery/pkg/util/sets"
policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
workv1alpha2 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha2"
)
// GetBindingClusterNames will get clusterName list from bind clusters field
func GetBindingClusterNames(spec *workv1alpha2.ResourceBindingSpec) []string {
var clusterNames []string
for _, targetCluster := range spec.Clusters {
clusterNames = append(clusterNames, targetCluster.Name)
}
return clusterNames
}
// IsBindingReplicasChanged will check if the sum of replicas is different from the replicas of object
func IsBindingReplicasChanged(bindingSpec *workv1alpha2.ResourceBindingSpec, strategy *policyv1alpha1.ReplicaSchedulingStrategy) bool {
if strategy == nil {
return false
}
if strategy.ReplicaSchedulingType == policyv1alpha1.ReplicaSchedulingTypeDuplicated {
for _, targetCluster := range bindingSpec.Clusters {
if targetCluster.Replicas != bindingSpec.Replicas {
return true
}
}
return false
}
if strategy.ReplicaSchedulingType == policyv1alpha1.ReplicaSchedulingTypeDivided {
replicasSum := GetSumOfReplicas(bindingSpec.Clusters)
return replicasSum != bindingSpec.Replicas
}
return false
}
// GetSumOfReplicas will get the sum of replicas in target clusters
func GetSumOfReplicas(clusters []workv1alpha2.TargetCluster) int32 {
replicasSum := int32(0)
for i := range clusters {
replicasSum += clusters[i].Replicas
}
return replicasSum
}
// ConvertToClusterNames will convert a cluster slice to clusterName's sets.String
func ConvertToClusterNames(clusters []workv1alpha2.TargetCluster) sets.Set[string] {
clusterNames := sets.New[string]()
for _, cluster := range clusters {
clusterNames.Insert(cluster.Name)
}
return clusterNames
}
// MergeTargetClusters will merge the replicas in two TargetCluster
func MergeTargetClusters(old, new []workv1alpha2.TargetCluster) []workv1alpha2.TargetCluster {
switch {
case len(old) == 0:
return new
case len(new) == 0:
return old
}
// oldMap is a map of the result for the old replicas so that it can be merged with the new result easily
oldMap := make(map[string]int32)
for _, cluster := range old {
oldMap[cluster.Name] = cluster.Replicas
}
// merge the new replicas and the data of old replicas
for i, cluster := range new {
value, ok := oldMap[cluster.Name]
if ok {
new[i].Replicas = cluster.Replicas + value
delete(oldMap, cluster.Name)
}
}
for key, value := range oldMap {
new = append(new, workv1alpha2.TargetCluster{Name: key, Replicas: value})
}
return new
}