Add networking.k8s.io v1 API, with NetworkPolicy

pkg/apis/networking/validation/validation.go

@@ -0,0 +1,99 @@
+/*
+Copyright 2017 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 (
+	"reflect"
+
+	unversionedvalidation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
+	"k8s.io/apimachinery/pkg/util/intstr"
+	"k8s.io/apimachinery/pkg/util/validation"
+	"k8s.io/apimachinery/pkg/util/validation/field"
+	"k8s.io/kubernetes/pkg/api"
+	apivalidation "k8s.io/kubernetes/pkg/api/validation"
+	"k8s.io/kubernetes/pkg/apis/networking"
+)
+
+// ValidateNetworkPolicyName can be used to check whether the given networkpolicy
+// name is valid.
+func ValidateNetworkPolicyName(name string, prefix bool) []string {
+	return apivalidation.NameIsDNSSubdomain(name, prefix)
+}
+
+// ValidateNetworkPolicySpec tests if required fields in the networkpolicy spec are set.
+func ValidateNetworkPolicySpec(spec *networking.NetworkPolicySpec, fldPath *field.Path) field.ErrorList {
+	allErrs := field.ErrorList{}
+	allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(&spec.PodSelector, fldPath.Child("podSelector"))...)
+
+	// Validate ingress rules.
+	for i, ingress := range spec.Ingress {
+		ingressPath := fldPath.Child("ingress").Index(i)
+		for i, port := range ingress.Ports {
+			portPath := ingressPath.Child("ports").Index(i)
+			if port.Protocol != nil && *port.Protocol != api.ProtocolTCP && *port.Protocol != api.ProtocolUDP {
+				allErrs = append(allErrs, field.NotSupported(portPath.Child("protocol"), *port.Protocol, []string{string(api.ProtocolTCP), string(api.ProtocolUDP)}))
+			}
+			if port.Port != nil {
+				if port.Port.Type == intstr.Int {
+					for _, msg := range validation.IsValidPortNum(int(port.Port.IntVal)) {
+						allErrs = append(allErrs, field.Invalid(portPath.Child("port"), port.Port.IntVal, msg))
+					}
+				} else {
+					for _, msg := range validation.IsValidPortName(port.Port.StrVal) {
+						allErrs = append(allErrs, field.Invalid(portPath.Child("port"), port.Port.StrVal, msg))
+					}
+				}
+			}
+		}
+		for i, from := range ingress.From {
+			fromPath := ingressPath.Child("from").Index(i)
+			numFroms := 0
+			if from.PodSelector != nil {
+				numFroms++
+				allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(from.PodSelector, fromPath.Child("podSelector"))...)
+			}
+			if from.NamespaceSelector != nil {
+				numFroms++
+				allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(from.NamespaceSelector, fromPath.Child("namespaceSelector"))...)
+			}
+
+			if numFroms == 0 {
+				allErrs = append(allErrs, field.Required(fromPath, "must specify a from type"))
+			} else if numFroms > 1 {
+				allErrs = append(allErrs, field.Forbidden(fromPath, "may not specify more than 1 from type"))
+			}
+		}
+	}
+	return allErrs
+}
+
+// ValidateNetworkPolicy validates a networkpolicy.
+func ValidateNetworkPolicy(np *networking.NetworkPolicy) field.ErrorList {
+	allErrs := apivalidation.ValidateObjectMeta(&np.ObjectMeta, true, ValidateNetworkPolicyName, field.NewPath("metadata"))
+	allErrs = append(allErrs, ValidateNetworkPolicySpec(&np.Spec, field.NewPath("spec"))...)
+	return allErrs
+}
+
+// ValidateNetworkPolicyUpdate tests if an update to a NetworkPolicy is valid.
+func ValidateNetworkPolicyUpdate(update, old *networking.NetworkPolicy) field.ErrorList {
+	allErrs := field.ErrorList{}
+	allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&update.ObjectMeta, &old.ObjectMeta, field.NewPath("metadata"))...)
+	if !reflect.DeepEqual(update.Spec, old.Spec) {
+		allErrs = append(allErrs, field.Forbidden(field.NewPath("spec"), "updates to networkpolicy spec are forbidden."))
+	}
+	return allErrs
+}