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machinedeployments.go
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/
machinedeployments.go
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/*
Copyright 2019 The Machine Controller Authors.
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.
*/
package admission
import (
"encoding/json"
"fmt"
clusterv1alpha1 "github.com/kubermatic/machine-controller/pkg/apis/cluster/v1alpha1"
admissionv1 "k8s.io/api/admission/v1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
)
func (ad *admissionData) mutateMachineDeployments(ar admissionv1.AdmissionRequest) (*admissionv1.AdmissionResponse, error) {
machineDeployment := clusterv1alpha1.MachineDeployment{}
if err := json.Unmarshal(ar.Object.Raw, &machineDeployment); err != nil {
return nil, fmt.Errorf("failed to unmarshal: %v", err)
}
machineDeploymentOriginal := machineDeployment.DeepCopy()
machineDeploymentDefaultingFunction(&machineDeployment)
if errs := validateMachineDeployment(machineDeployment); len(errs) > 0 {
return nil, fmt.Errorf("validation failed: %v", errs)
}
// Do not validate the spec if it hasn't changed
machineSpecNeedsValidation := true
if ar.Operation == admissionv1.Update {
var oldMachineDeployment clusterv1alpha1.MachineDeployment
if err := json.Unmarshal(ar.OldObject.Raw, &oldMachineDeployment); err != nil {
return nil, fmt.Errorf("failed to unmarshal OldObject: %v", err)
}
if equal := apiequality.Semantic.DeepEqual(oldMachineDeployment.Spec.Template.Spec, machineDeployment.Spec.Template.Spec); equal {
machineSpecNeedsValidation = false
}
}
if machineSpecNeedsValidation {
if err := ad.defaultAndValidateMachineSpec(&machineDeployment.Spec.Template.Spec); err != nil {
return nil, err
}
}
return createAdmissionResponse(machineDeploymentOriginal, &machineDeployment)
}