/
client.go
199 lines (175 loc) · 5.65 KB
/
client.go
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// Copyright (c) Red Hat, Inc.
// Copyright Contributors to the Open Cluster Management project
// Licensed under the Apache License 2.0
package util
import (
"context"
"fmt"
ocpClientSet "github.com/openshift/client-go/config/clientset/versioned"
promClientSet "github.com/prometheus-operator/prometheus-operator/pkg/client/versioned"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
crdClientSet "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"sigs.k8s.io/controller-runtime/pkg/client"
logf "sigs.k8s.io/controller-runtime/pkg/log"
)
const ConfigErrorMessage = "Failed to create the config"
var log = logf.Log.WithName("util")
var (
kubeClient kubernetes.Interface
crdClient crdClientSet.Interface
ocpClient ocpClientSet.Interface
promClient promClientSet.Interface
)
// GetOrCreateKubeClient gets existing kubeclient or creates new one if it doesn't exist.
func GetOrCreateKubeClient() (kubernetes.Interface, error) {
if kubeClient != nil {
return kubeClient, nil
}
// create the config from the path
config, err := clientcmd.BuildConfigFromFlags("", "")
if err != nil {
log.Error(err, ConfigErrorMessage)
return nil, err
}
// generate the client based off of the config
kubeClient, err = kubernetes.NewForConfig(config)
if err != nil {
log.Error(err, "Failed to create kube client")
return nil, err
}
return kubeClient, nil
}
// GetOrCreateOCPClient creates ocp client.
func GetOrCreateOCPClient() (ocpClientSet.Interface, error) {
if crdClient != nil {
return ocpClient, nil
}
// create the config from the path
config, err := clientcmd.BuildConfigFromFlags("", "")
if err != nil {
log.Error(err, ConfigErrorMessage)
return nil, err
}
// generate the client based off of the config
ocpClient, err = ocpClientSet.NewForConfig(config)
if err != nil {
log.Error(err, "Failed to create ocp config client")
return nil, err
}
return ocpClient, err
}
// GetOrCreateCRDClient gets an existing or creates a new CRD client.
func GetOrCreateCRDClient() (crdClientSet.Interface, error) {
if crdClient != nil {
return crdClient, nil
}
// create the config from the path
config, err := clientcmd.BuildConfigFromFlags("", "")
if err != nil {
log.Error(err, ConfigErrorMessage)
return nil, err
}
// generate the client based off of the config
crdClient, err = crdClientSet.NewForConfig(config)
if err != nil {
log.Error(err, "Failed to create CRD config client")
return nil, err
}
return crdClient, err
}
// GetOrCreatePromClient creates prometheus client.
func GetOrCreatePromClient() (promClientSet.Interface, error) {
if promClient != nil {
return promClient, nil
}
// create the config from the path
config, err := clientcmd.BuildConfigFromFlags("", "")
if err != nil {
log.Error(err, ConfigErrorMessage)
return nil, err
}
// generate the client based off of the config
promClient, err = promClientSet.NewForConfig(config)
if err != nil {
log.Error(err, "Failed to create prom client")
return nil, err
}
return promClient, err
}
func CheckCRDExist(crdClient crdClientSet.Interface, crdName string) (bool, error) {
_, err := crdClient.ApiextensionsV1().CustomResourceDefinitions().Get(context.TODO(), crdName, metav1.GetOptions{})
if err != nil {
if apierrors.IsNotFound(err) {
log.Info("unable to get CRD with ApiextensionsV1 Client, not found.", "CRD", crdName)
return false, nil
}
log.Error(err, "failed to get CRD with ApiextensionsV1 Client", "CRD", crdName)
return false, err
}
return true, nil
}
func UpdateCRDWebhookNS(crdClient crdClientSet.Interface, namespace, crdName string) error {
crdObj, err := crdClient.ApiextensionsV1().
CustomResourceDefinitions().
Get(context.TODO(), crdName, metav1.GetOptions{})
if err != nil {
log.Error(err, "failed to get CRD", "CRD", crdName)
return err
}
if crdObj.Spec.Conversion == nil || crdObj.Spec.Conversion.Webhook == nil ||
crdObj.Spec.Conversion.Webhook.ClientConfig == nil {
log.Error(err, "empty Conversion in the CRD", "CRD", crdName)
return fmt.Errorf("empty Conversion in the CRD %s", crdName)
}
if crdObj.Spec.Conversion.Webhook.ClientConfig.Service.Namespace != namespace {
log.Info(
"updating the webhook service namespace",
"original namespace",
crdObj.Spec.Conversion.Webhook.ClientConfig.Service.Namespace,
"new namespace",
namespace,
)
crdObj.Spec.Conversion.Webhook.ClientConfig.Service.Namespace = namespace
_, err := crdClient.ApiextensionsV1().
CustomResourceDefinitions().
Update(context.TODO(), crdObj, metav1.UpdateOptions{})
if err != nil {
log.Error(err, "failed to update webhook service namespace")
return err
}
}
return nil
}
// GetPVCList get pvc with matched labels.
func GetPVCList(c client.Client, namespace string,
matchLabels map[string]string) ([]corev1.PersistentVolumeClaim, error) {
pvcList := &corev1.PersistentVolumeClaimList{}
pvcListOpts := []client.ListOption{
client.InNamespace(namespace),
client.MatchingLabels(matchLabels),
}
err := c.List(context.TODO(), pvcList, pvcListOpts...)
if err != nil {
return nil, err
}
return pvcList.Items, nil
}
// GetStatefulSetList get sts with matched labels.
func GetStatefulSetList(c client.Client, namespace string,
matchLabels map[string]string) ([]appsv1.StatefulSet, error) {
stsList := &appsv1.StatefulSetList{}
stsListOpts := []client.ListOption{
client.InNamespace(namespace),
client.MatchingLabels(matchLabels),
}
err := c.List(context.TODO(), stsList, stsListOpts...)
if err != nil {
return nil, err
}
return stsList.Items, nil
}