Fix taking a crd that is not yet installed

Signed-off-by: dmitry.koba <dmitry.koba@flant.com>

pkg/webhook/conversion/crd_client_config.go

@@ -2,11 +2,12 @@ package conversion
 
 import (
 	"context"
-	"fmt"
+	"time"
 
 	log "github.com/sirupsen/logrus"
 	extv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/klog/v2"
 
 	klient "github.com/flant/kube-client/client"
 )
@@ -24,23 +25,17 @@ type CrdClientConfig struct {
 var SupportedConversionReviewVersions = []string{"v1", "v1beta1"}
 
 func (c *CrdClientConfig) Update() error {
-	client := c.KubeClient
+	var retryTimeout = 15 * time.Second
+	var client = c.KubeClient
 
-	listOpts := metav1.ListOptions{
-		FieldSelector: "metadata.name=" + c.CrdName,
-	}
-
-	crdList, err := client.ApiExt().CustomResourceDefinitions().List(context.TODO(), listOpts)
+tryToGetCRD:
+	crd, err := client.ApiExt().CustomResourceDefinitions().Get(context.TODO(), c.CrdName, metav1.GetOptions{})
 	if err != nil {
-		return err
+		klog.Errorf("crd getting error: %s. Retry will be executed after %s seconds.", err, retryTimeout)
+		time.Sleep(retryTimeout)
+		goto tryToGetCRD
 	}
 
-	if len(crdList.Items) == 0 {
-		return fmt.Errorf("crd/%s not found", c.CrdName)
-	}
-
-	crd := crdList.Items[0]
-
 	if crd.Spec.Conversion == nil {
 		crd.Spec.Conversion = new(extv1.CustomResourceConversion)
 	}