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service_validator.go
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service_validator.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package webhooks
import (
"context"
"fmt"
"net/http"
)
import (
kube_core "k8s.io/api/core/v1"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
import (
core_mesh "github.com/apache/dubbo-kubernetes/pkg/core/resources/apis/mesh"
"github.com/apache/dubbo-kubernetes/pkg/core/validators"
)
// ServiceValidator validates Dubbo-specific annotations on Services.
type ServiceValidator struct {
Decoder *admission.Decoder
}
// Handle admits a Service only if Dubbo-specific annotations have proper values.
func (v *ServiceValidator) Handle(ctx context.Context, req admission.Request) admission.Response {
svc := &kube_core.Service{}
err := v.Decoder.Decode(req, svc)
if err != nil {
return admission.Errored(http.StatusBadRequest, err)
}
if err := v.validate(svc); err != nil {
if verr, ok := err.(*validators.ValidationError); ok {
return convertValidationErrorOf(*verr, svc, svc)
}
return admission.Denied(err.Error())
}
return admission.Allowed("")
}
func (v *ServiceValidator) validate(svc *kube_core.Service) error {
verr := &validators.ValidationError{}
for _, svcPort := range svc.Spec.Ports {
protocolAnnotation := fmt.Sprintf("%d.service.dubbo.io/protocol", svcPort.Port)
protocolAnnotationValue, exists := svc.Annotations[protocolAnnotation]
if exists && core_mesh.ParseProtocol(protocolAnnotationValue) == core_mesh.ProtocolUnknown {
verr.AddViolationAt(validators.RootedAt("metadata").Field("annotations").Key(protocolAnnotation),
fmt.Sprintf("value %q is not valid. %s", protocolAnnotationValue, core_mesh.AllowedValuesHint(core_mesh.SupportedProtocols.Strings()...)))
}
}
return verr.OrNil()
}