volcano.sh/volcano@v1.9.0/pkg/webhooks/admission/podgroups/mutate/mutate_podgroup.go (about)

     1  /*
     2  Copyright 2021 The Volcano Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package mutate
    18  
    19  import (
    20  	"context"
    21  	"encoding/json"
    22  	"fmt"
    23  
    24  	admissionv1 "k8s.io/api/admission/v1"
    25  	whv1 "k8s.io/api/admissionregistration/v1"
    26  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    27  	"k8s.io/klog/v2"
    28  
    29  	schedulingv1beta1 "volcano.sh/apis/pkg/apis/scheduling/v1beta1"
    30  	"volcano.sh/volcano/pkg/webhooks/router"
    31  	"volcano.sh/volcano/pkg/webhooks/schema"
    32  	"volcano.sh/volcano/pkg/webhooks/util"
    33  )
    34  
    35  func init() {
    36  	router.RegisterAdmission(service)
    37  }
    38  
    39  var service = &router.AdmissionService{
    40  	Path:   "/podgroups/mutate",
    41  	Func:   PodGroups,
    42  	Config: config,
    43  	MutatingConfig: &whv1.MutatingWebhookConfiguration{
    44  		Webhooks: []whv1.MutatingWebhook{{
    45  			Name: "mutatepodgroup.volcano.sh",
    46  			Rules: []whv1.RuleWithOperations{
    47  				{
    48  					Operations: []whv1.OperationType{whv1.Create},
    49  					Rule: whv1.Rule{
    50  						APIGroups:   []string{schedulingv1beta1.SchemeGroupVersion.Group},
    51  						APIVersions: []string{schedulingv1beta1.SchemeGroupVersion.Version},
    52  						Resources:   []string{"podgroups"},
    53  					},
    54  				},
    55  			},
    56  		}},
    57  	},
    58  }
    59  
    60  var config = &router.AdmissionServiceConfig{}
    61  
    62  type patchOperation struct {
    63  	Op    string      `json:"op"`
    64  	Path  string      `json:"path"`
    65  	Value interface{} `json:"value,omitempty"`
    66  }
    67  
    68  // PodGroups mutate podgroups.
    69  func PodGroups(ar admissionv1.AdmissionReview) *admissionv1.AdmissionResponse {
    70  	klog.V(3).Infof("Mutating %s podgroup %s.", ar.Request.Operation, ar.Request.Name)
    71  
    72  	podgroup, err := schema.DecodePodGroup(ar.Request.Object, ar.Request.Resource)
    73  	if err != nil {
    74  		return util.ToAdmissionResponse(err)
    75  	}
    76  
    77  	var patchBytes []byte
    78  	switch ar.Request.Operation {
    79  	case admissionv1.Create:
    80  		patchBytes, err = createPodGroupPatch(podgroup)
    81  	default:
    82  		return util.ToAdmissionResponse(fmt.Errorf("invalid operation `%s`, "+
    83  			"expect operation to be `CREATE`", ar.Request.Operation))
    84  	}
    85  
    86  	if err != nil {
    87  		return &admissionv1.AdmissionResponse{
    88  			Allowed: false,
    89  			Result:  &metav1.Status{Message: err.Error()},
    90  		}
    91  	}
    92  
    93  	reviewResponse := admissionv1.AdmissionResponse{
    94  		Allowed: true,
    95  		Patch:   patchBytes,
    96  	}
    97  	if len(patchBytes) > 0 {
    98  		pt := admissionv1.PatchTypeJSONPatch
    99  		reviewResponse.PatchType = &pt
   100  	}
   101  	return &reviewResponse
   102  }
   103  
   104  func createPodGroupPatch(podgroup *schedulingv1beta1.PodGroup) ([]byte, error) {
   105  	var patch []patchOperation
   106  	if len(podgroup.Spec.Queue) == 0 {
   107  		queueName := schedulingv1beta1.DefaultQueue
   108  		ns, err := config.KubeClient.CoreV1().Namespaces().Get(context.TODO(), podgroup.Namespace, metav1.GetOptions{})
   109  		if err == nil {
   110  			if val, ok := ns.GetAnnotations()[schedulingv1beta1.QueueNameAnnotationKey]; ok {
   111  				queueName = val
   112  			}
   113  		}
   114  		patch = append(patch, patchOperation{
   115  			Op:    "add",
   116  			Path:  "/spec/queue",
   117  			Value: queueName,
   118  		})
   119  	}
   120  
   121  	return json.Marshal(patch)
   122  }