K8s: Refactor config/options for aggregation (#81739)

pkg/services/apiserver/utils/uids.go

@@ -0,0 +1,37 @@
+package utils
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"strings"
+	"unicode"
+
+	"k8s.io/apimachinery/pkg/api/meta"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+)
+
+// Create a stable UID that will be unique across a multi-tenant cluster
+// This is useful while we migrate from SQL storage to something where the UID (GUID)
+// is actually baked into the storage engine itself.
+func CalculateClusterWideUID(obj runtime.Object) types.UID {
+	gvk := obj.GetObjectKind().GroupVersionKind()
+	hasher := sha256.New()
+	hasher.Write([]byte(gvk.Group))
+	hasher.Write([]byte("|"))
+	hasher.Write([]byte(gvk.Kind))
+	hasher.Write([]byte("|"))
+	meta, err := meta.Accessor(obj)
+	if err == nil {
+		hasher.Write([]byte(meta.GetNamespace()))
+		hasher.Write([]byte("|"))
+		hasher.Write([]byte(meta.GetName()))
+	}
+	v := base64.URLEncoding.EncodeToString(hasher.Sum(nil))
+	return types.UID(strings.Map(func(r rune) rune {
+		if !(unicode.IsLetter(r) || unicode.IsDigit(r)) {
+			return 'X'
+		}
+		return r
+	}, v))
+}