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migration-create-mutator.go
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migration-create-mutator.go
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/*
* This file is part of the KubeVirt project
*
* 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.
*
* Copyright 2018 Red Hat, Inc.
*
*/
package mutators
import (
"encoding/json"
"fmt"
"kubevirt.io/kubevirt/pkg/apimachinery/patch"
admissionv1 "k8s.io/api/admission/v1"
v1 "kubevirt.io/api/core/v1"
webhookutils "kubevirt.io/kubevirt/pkg/util/webhooks"
"kubevirt.io/kubevirt/pkg/virt-api/webhooks"
)
type MigrationCreateMutator struct {
}
func (mutator *MigrationCreateMutator) Mutate(ar *admissionv1.AdmissionReview) *admissionv1.AdmissionResponse {
if !webhookutils.ValidateRequestResource(ar.Request.Resource, webhooks.MigrationGroupVersionResource.Group, webhooks.MigrationGroupVersionResource.Resource) {
err := fmt.Errorf("expect resource to be '%s'", webhooks.MigrationGroupVersionResource.Resource)
return webhookutils.ToAdmissionResponseError(err)
}
if resp := webhookutils.ValidateSchema(v1.VirtualMachineInstanceMigrationGroupVersionKind, ar.Request.Object.Raw); resp != nil {
return resp
}
raw := ar.Request.Object.Raw
migration := v1.VirtualMachineInstanceMigration{}
err := json.Unmarshal(raw, &migration)
if err != nil {
return webhookutils.ToAdmissionResponseError(err)
}
// Add our selector label
if migration.Labels == nil {
migration.Labels = map[string]string{v1.MigrationSelectorLabel: migration.Spec.VMIName}
} else {
migration.Labels[v1.MigrationSelectorLabel] = migration.Spec.VMIName
}
// Add a finalizer
migration.Finalizers = append(migration.Finalizers, v1.VirtualMachineInstanceMigrationFinalizer)
patchBytes, err := patch.GeneratePatchPayload(
patch.PatchOperation{
Op: patch.PatchReplaceOp,
Path: "/spec",
Value: migration.Spec,
},
patch.PatchOperation{
Op: patch.PatchReplaceOp,
Path: "/metadata",
Value: migration.ObjectMeta,
},
)
if err != nil {
return webhookutils.ToAdmissionResponseError(err)
}
jsonPatchType := admissionv1.PatchTypeJSONPatch
return &admissionv1.AdmissionResponse{
Allowed: true,
Patch: patchBytes,
PatchType: &jsonPatchType,
}
}