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cluster.go
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cluster.go
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package util
import (
"context"
"fmt"
"reflect"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/klog/v2"
"sigs.k8s.io/controller-runtime/pkg/client"
clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
karmadaclientset "github.com/karmada-io/karmada/pkg/generated/clientset/versioned"
)
const (
// NamespaceClusterLease is the namespace which cluster lease are stored.
NamespaceClusterLease = "karmada-cluster"
)
// IsClusterReady tells whether the cluster status in 'Ready' condition.
func IsClusterReady(clusterStatus *clusterv1alpha1.ClusterStatus) bool {
return meta.IsStatusConditionTrue(clusterStatus.Conditions, clusterv1alpha1.ClusterConditionReady)
}
// GetCluster returns the given Cluster resource
func GetCluster(hostClient client.Client, clusterName string) (*clusterv1alpha1.Cluster, error) {
cluster := &clusterv1alpha1.Cluster{}
if err := hostClient.Get(context.TODO(), types.NamespacedName{Name: clusterName}, cluster); err != nil {
return nil, err
}
return cluster, nil
}
// CreateClusterObject create cluster object in karmada control plane
func CreateClusterObject(controlPlaneClient *karmadaclientset.Clientset, clusterObj *clusterv1alpha1.Cluster) (*clusterv1alpha1.Cluster, error) {
cluster, exist, err := GetClusterWithKarmadaClient(controlPlaneClient, clusterObj.Name)
if err != nil {
return nil, err
}
if exist {
return cluster, fmt.Errorf("cluster(%s) already exist", clusterObj.Name)
}
if cluster, err = createCluster(controlPlaneClient, clusterObj); err != nil {
klog.Warningf("failed to create cluster(%s). error: %v", clusterObj.Name, err)
return nil, err
}
return cluster, nil
}
// CreateOrUpdateClusterObject create cluster object in karmada control plane,
// if cluster object has been existed and different from input clusterObj, update it.
func CreateOrUpdateClusterObject(controlPlaneClient *karmadaclientset.Clientset, clusterObj *clusterv1alpha1.Cluster) (*clusterv1alpha1.Cluster, error) {
cluster, exist, err := GetClusterWithKarmadaClient(controlPlaneClient, clusterObj.Name)
if err != nil {
return nil, err
}
if exist {
if reflect.DeepEqual(cluster.Spec, clusterObj.Spec) {
klog.Warningf("cluster(%s) already exist and newest", clusterObj.Name)
return cluster, nil
}
cluster.Spec = clusterObj.Spec
cluster, err = updateCluster(controlPlaneClient, cluster)
if err != nil {
klog.Warningf("failed to create cluster(%s). error: %v", clusterObj.Name, err)
return nil, err
}
return cluster, nil
}
if cluster, err = createCluster(controlPlaneClient, clusterObj); err != nil {
klog.Warningf("failed to create cluster(%s). error: %v", clusterObj.Name, err)
return nil, err
}
return cluster, nil
}
// GetClusterWithKarmadaClient tells if a cluster already joined to control plane.
func GetClusterWithKarmadaClient(client karmadaclientset.Interface, name string) (*clusterv1alpha1.Cluster, bool, error) {
cluster, err := client.ClusterV1alpha1().Clusters().Get(context.TODO(), name, metav1.GetOptions{})
if err != nil {
if apierrors.IsNotFound(err) {
return nil, false, nil
}
klog.Warningf("failed to retrieve cluster(%s). error: %v", cluster.Name, err)
return nil, false, err
}
return cluster, true, nil
}
func createCluster(controlPlaneClient karmadaclientset.Interface, cluster *clusterv1alpha1.Cluster) (*clusterv1alpha1.Cluster, error) {
newCluster, err := controlPlaneClient.ClusterV1alpha1().Clusters().Create(context.TODO(), cluster, metav1.CreateOptions{})
if err != nil {
klog.Warningf("failed to create cluster(%s). error: %v", cluster.Name, err)
return nil, err
}
return newCluster, nil
}
func updateCluster(controlPlaneClient karmadaclientset.Interface, cluster *clusterv1alpha1.Cluster) (*clusterv1alpha1.Cluster, error) {
newCluster, err := controlPlaneClient.ClusterV1alpha1().Clusters().Update(context.TODO(), cluster, metav1.UpdateOptions{})
if err != nil {
klog.Warningf("failed to update cluster(%s). error: %v", cluster.Name, err)
return nil, err
}
return newCluster, nil
}