diff --git a/metrics-server/vendor/k8s.io/apimachinery/pkg/api/validation/generic.go b/metrics-server/vendor/k8s.io/apimachinery/pkg/api/validation/generic.go
new file mode 100644
index 0000000..348cdc0
--- /dev/null
+++ b/metrics-server/vendor/k8s.io/apimachinery/pkg/api/validation/generic.go
@@ -0,0 +1,85 @@
+/*
+Copyright 2014 The Kubernetes 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 validation
+
+import (
+	"strings"
+
+	"k8s.io/apimachinery/pkg/util/validation"
+	"k8s.io/apimachinery/pkg/util/validation/field"
+)
+
+const IsNegativeErrorMsg string = `must be greater than or equal to 0`
+
+// ValidateNameFunc validates that the provided name is valid for a given resource type.
+// Not all resources have the same validation rules for names. Prefix is true
+// if the name will have a value appended to it.  If the name is not valid,
+// this returns a list of descriptions of individual characteristics of the
+// value that were not valid.  Otherwise this returns an empty list or nil.
+type ValidateNameFunc func(name string, prefix bool) []string
+
+// NameIsDNSSubdomain is a ValidateNameFunc for names that must be a DNS subdomain.
+func NameIsDNSSubdomain(name string, prefix bool) []string {
+	if prefix {
+		name = maskTrailingDash(name)
+	}
+	return validation.IsDNS1123Subdomain(name)
+}
+
+// NameIsDNSLabel is a ValidateNameFunc for names that must be a DNS 1123 label.
+func NameIsDNSLabel(name string, prefix bool) []string {
+	if prefix {
+		name = maskTrailingDash(name)
+	}
+	return validation.IsDNS1123Label(name)
+}
+
+// NameIsDNS1035Label is a ValidateNameFunc for names that must be a DNS 952 label.
+func NameIsDNS1035Label(name string, prefix bool) []string {
+	if prefix {
+		name = maskTrailingDash(name)
+	}
+	return validation.IsDNS1035Label(name)
+}
+
+// ValidateNamespaceName can be used to check whether the given namespace name is valid.
+// Prefix indicates this name will be used as part of generation, in which case
+// trailing dashes are allowed.
+var ValidateNamespaceName = NameIsDNSLabel
+
+// ValidateServiceAccountName can be used to check whether the given service account name is valid.
+// Prefix indicates this name will be used as part of generation, in which case
+// trailing dashes are allowed.
+var ValidateServiceAccountName = NameIsDNSSubdomain
+
+// maskTrailingDash replaces the final character of a string with a subdomain safe
+// value if is a dash.
+func maskTrailingDash(name string) string {
+	if strings.HasSuffix(name, "-") {
+		return name[:len(name)-2] + "a"
+	}
+	return name
+}
+
+// Validates that given value is not negative.
+func ValidateNonnegativeField(value int64, fldPath *field.Path) field.ErrorList {
+	allErrs := field.ErrorList{}
+	if value < 0 {
+		allErrs = append(allErrs, field.Invalid(fldPath, value, IsNegativeErrorMsg))
+	}
+	return allErrs
+}