PetSet type, apps apigroup

pkg/apis/apps/validation/validation.go

@@ -0,0 +1,110 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 (
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	unversionedvalidation "k8s.io/kubernetes/pkg/api/unversioned/validation"
+	apivalidation "k8s.io/kubernetes/pkg/api/validation"
+	"k8s.io/kubernetes/pkg/apis/apps"
+	"k8s.io/kubernetes/pkg/labels"
+	"k8s.io/kubernetes/pkg/util/validation/field"
+)
+
+// ValidatePetSetName can be used to check whether the given PetSet
+// name is valid.
+// Prefix indicates this name will be used as part of generation, in which case
+// trailing dashes are allowed.
+func ValidatePetSetName(name string, prefix bool) (bool, string) {
+	return apivalidation.NameIsDNSSubdomain(name, prefix)
+}
+
+// Validates the given template and ensures that it is in accordance with the desired selector.
+func ValidatePodTemplateSpecForPetSet(template *api.PodTemplateSpec, selector labels.Selector, fldPath *field.Path) field.ErrorList {
+	allErrs := field.ErrorList{}
+	if template == nil {
+		allErrs = append(allErrs, field.Required(fldPath, ""))
+	} else {
+		if !selector.Empty() {
+			// Verify that the PetSet selector matches the labels in template.
+			labels := labels.Set(template.Labels)
+			if !selector.Matches(labels) {
+				allErrs = append(allErrs, field.Invalid(fldPath.Child("metadata", "labels"), template.Labels, "`selector` does not match template `labels`"))
+			}
+		}
+		// TODO: Add validation for PodSpec, currently this will check volumes, which we know will
+		// fail. We should really check that the union of the given volumes and volumeClaims match
+		// volume mounts in the containers.
+		// allErrs = append(allErrs, apivalidation.ValidatePodTemplateSpec(template, fldPath)...)
+		allErrs = append(allErrs, apivalidation.ValidateLabels(template.Labels, fldPath.Child("labels"))...)
+		allErrs = append(allErrs, apivalidation.ValidateAnnotations(template.Annotations, fldPath.Child("annotations"))...)
+		allErrs = append(allErrs, apivalidation.ValidatePodSpecificAnnotations(template.Annotations, fldPath.Child("annotations"))...)
+	}
+	return allErrs
+}
+
+// ValidatePetSetSpec tests if required fields in the PetSet spec are set.
+func ValidatePetSetSpec(spec *apps.PetSetSpec, fldPath *field.Path) field.ErrorList {
+	allErrs := field.ErrorList{}
+
+	allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(spec.Replicas), fldPath.Child("replicas"))...)
+	if spec.Selector == nil {
+		allErrs = append(allErrs, field.Required(fldPath.Child("selector"), ""))
+	} else {
+		allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(spec.Selector, fldPath.Child("selector"))...)
+		if len(spec.Selector.MatchLabels)+len(spec.Selector.MatchExpressions) == 0 {
+			allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, "empty selector is not valid for petset."))
+		}
+	}
+
+	selector, err := unversioned.LabelSelectorAsSelector(spec.Selector)
+	if err != nil {
+		allErrs = append(allErrs, field.Invalid(fldPath.Child("selector"), spec.Selector, ""))
+	} else {
+		allErrs = append(allErrs, ValidatePodTemplateSpecForPetSet(&spec.Template, selector, fldPath.Child("template"))...)
+	}
+
+	if spec.Template.Spec.RestartPolicy != api.RestartPolicyAlways {
+		allErrs = append(allErrs, field.NotSupported(fldPath.Child("template", "spec", "restartPolicy"), spec.Template.Spec.RestartPolicy, []string{string(api.RestartPolicyAlways)}))
+	}
+
+	return allErrs
+}
+
+// ValidatePetSet validates a PetSet.
+func ValidatePetSet(petSet *apps.PetSet) field.ErrorList {
+	allErrs := apivalidation.ValidateObjectMeta(&petSet.ObjectMeta, true, ValidatePetSetName, field.NewPath("metadata"))
+	allErrs = append(allErrs, ValidatePetSetSpec(&petSet.Spec, field.NewPath("spec"))...)
+	return allErrs
+}
+
+// ValidatePetSetUpdate tests if required fields in the PetSet are set.
+func ValidatePetSetUpdate(petSet, oldPetSet *apps.PetSet) field.ErrorList {
+	allErrs := field.ErrorList{}
+	allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&petSet.ObjectMeta, &oldPetSet.ObjectMeta, field.NewPath("metadata"))...)
+	allErrs = append(allErrs, ValidatePetSetSpec(&petSet.Spec, field.NewPath("spec"))...)
+	return allErrs
+}
+
+// ValidatePetSetStatusUpdate tests if required fields in the PetSet are set.
+func ValidatePetSetStatusUpdate(petSet, oldPetSet *apps.PetSet) field.ErrorList {
+	allErrs := field.ErrorList{}
+	allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&petSet.ObjectMeta, &oldPetSet.ObjectMeta, field.NewPath("metadata"))...)
+	// TODO: Validate status.
+	return allErrs
+}