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labels.go
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labels.go
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package report
import (
"crypto/md5" //nolint:gosec
"encoding/hex"
"encoding/json"
"fmt"
"strings"
kyvernov1 "github.com/kyverno/kyverno/api/kyverno/v1"
kyvernov1alpha2 "github.com/kyverno/kyverno/api/kyverno/v1alpha2"
controllerutils "github.com/kyverno/kyverno/pkg/utils/controller"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/types"
)
const (
// resource labels
LabelResourceHash = "audit.kyverno.io/resource.hash"
LabelResourceUid = "audit.kyverno.io/resource.uid"
// policy labels
LabelDomainClusterPolicy = "pol.kyverno.io"
LabelDomainPolicy = "cpol.kyverno.io"
LabelPrefixClusterPolicy = LabelDomainClusterPolicy + "/"
LabelPrefixPolicy = LabelDomainPolicy + "/"
)
func IsPolicyLabel(label string) bool {
return strings.HasPrefix(label, LabelPrefixPolicy) || strings.HasPrefix(label, LabelPrefixClusterPolicy)
}
func PolicyNameFromLabel(namespace, label string) (string, error) {
names := strings.Split(label, "/")
if len(names) == 2 {
if names[0] == LabelDomainClusterPolicy {
return names[1], nil
} else if names[0] == LabelDomainPolicy {
return namespace + "/" + names[1], nil
}
}
return "", fmt.Errorf("cannot get policy name from label, incorrect format: %s", label)
}
func PolicyLabelPrefix(policy kyvernov1.PolicyInterface) string {
if policy.IsNamespaced() {
return LabelPrefixPolicy
}
return LabelPrefixClusterPolicy
}
func PolicyLabelDomain(policy kyvernov1.PolicyInterface) string {
if policy.IsNamespaced() {
return LabelDomainPolicy
}
return LabelDomainClusterPolicy
}
func PolicyLabel(policy kyvernov1.PolicyInterface) string {
return PolicyLabelPrefix(policy) + policy.GetName()
}
func SetManagedByKyvernoLabel(obj metav1.Object) {
controllerutils.SetLabel(obj, kyvernov1.LabelAppManagedBy, kyvernov1.ValueKyvernoApp)
}
func SetResourceLabels(report kyvernov1alpha2.ReportInterface, namespace, name string, uid types.UID) {
controllerutils.SetLabel(report, LabelResourceUid, string(uid))
}
func CalculateResourceHash(resource unstructured.Unstructured) string {
copy := resource.DeepCopy()
obj := copy.Object
labels := copy.GetLabels()
annotations := copy.GetAnnotations()
unstructured.RemoveNestedField(obj, "metadata")
unstructured.RemoveNestedField(obj, "status")
unstructured.RemoveNestedField(obj, "scale")
// fix for pods
unstructured.RemoveNestedField(obj, "spec", "nodeName")
input := []interface{}{labels, annotations, obj}
data, err := json.Marshal(input)
if err != nil {
return ""
}
hash := md5.Sum(data) //nolint:gosec
return hex.EncodeToString(hash[:])
}
func SetResourceVersionLabels(report kyvernov1alpha2.ReportInterface, resource *unstructured.Unstructured) {
if resource != nil {
controllerutils.SetLabel(report, LabelResourceHash, CalculateResourceHash(*resource))
} else {
controllerutils.SetLabel(report, LabelResourceHash, "")
}
}
func SetPolicyLabel(report kyvernov1alpha2.ReportInterface, policy kyvernov1.PolicyInterface) {
controllerutils.SetLabel(report, PolicyLabel(policy), policy.GetResourceVersion())
}
func GetResourceUid(report metav1.Object) types.UID {
return types.UID(report.GetLabels()[LabelResourceUid])
}
func GetResourceHash(report metav1.Object) string {
return report.GetLabels()[LabelResourceHash]
}
func CompareHash(report metav1.Object, hash string) bool {
return GetResourceHash(report) == hash
}