71 lines
2.3 KiB
Go
71 lines
2.3 KiB
Go
package propagationpolicy
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import (
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"context"
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"net/http"
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admissionv1 "k8s.io/api/admission/v1"
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"k8s.io/apimachinery/pkg/api/equality"
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"k8s.io/klog/v2"
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"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
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policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
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"github.com/karmada-io/karmada/pkg/util/helper"
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"github.com/karmada-io/karmada/pkg/util/validation"
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)
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// ValidatingAdmission validates PropagationPolicy object when creating/updating/deleting.
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type ValidatingAdmission struct {
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decoder *admission.Decoder
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}
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// Check if our ValidatingAdmission implements necessary interface
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var _ admission.Handler = &ValidatingAdmission{}
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var _ admission.DecoderInjector = &ValidatingAdmission{}
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// Handle implements admission.Handler interface.
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// It yields a response to an AdmissionRequest.
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func (v *ValidatingAdmission) Handle(ctx context.Context, req admission.Request) admission.Response {
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policy := &policyv1alpha1.PropagationPolicy{}
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err := v.decoder.Decode(req, policy)
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if err != nil {
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return admission.Errored(http.StatusBadRequest, err)
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}
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klog.V(2).Infof("Validating PropagationPolicy(%s/%s) for request: %s", policy.Namespace, policy.Name, req.Operation)
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if req.Operation == admissionv1.Update {
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oldPolicy := &policyv1alpha1.PropagationPolicy{}
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err := v.decoder.DecodeRaw(req.OldObject, oldPolicy)
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if err != nil {
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return admission.Errored(http.StatusBadRequest, err)
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}
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if !equality.Semantic.DeepEqual(policy.Spec.ResourceSelectors, oldPolicy.Spec.ResourceSelectors) {
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klog.Info(helper.DenyReasonResourceSelectorsModify)
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return admission.Denied(helper.DenyReasonResourceSelectorsModify)
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}
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}
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if err := helper.ValidateSpreadConstraint(policy.Spec.Placement.SpreadConstraints); err != nil {
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klog.Error(err)
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return admission.Denied(err.Error())
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}
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if policy.Spec.Placement.ClusterAffinity != nil && policy.Spec.Placement.ClusterAffinity.FieldSelector != nil {
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err := validation.ValidatePolicyFieldSelector(policy.Spec.Placement.ClusterAffinity.FieldSelector)
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if err != nil {
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klog.Error(err)
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return admission.Denied(err.Error())
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}
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}
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return admission.Allowed("")
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}
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// InjectDecoder implements admission.DecoderInjector interface.
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// A decoder will be automatically injected.
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func (v *ValidatingAdmission) InjectDecoder(d *admission.Decoder) error {
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v.decoder = d
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return nil
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}
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