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seed.go
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seed.go
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// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 (
corev1 "k8s.io/api/core/v1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
apivalidation "k8s.io/apimachinery/pkg/api/validation"
metav1validation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/validation/field"
"github.com/gardener/gardener/pkg/apis/core"
"github.com/gardener/gardener/pkg/apis/core/helper"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/utils"
cidrvalidation "github.com/gardener/gardener/pkg/utils/validation/cidr"
)
var (
availableIngressKinds = sets.New[string](
v1beta1constants.IngressKindNginx,
)
availableExternalTrafficPolicies = sets.New[string](
string(corev1.ServiceExternalTrafficPolicyTypeCluster),
string(corev1.ServiceExternalTrafficPolicyTypeLocal),
)
)
// ValidateSeed validates a Seed object.
func ValidateSeed(seed *core.Seed) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateObjectMeta(&seed.ObjectMeta, false, apivalidation.NameIsDNSLabel, field.NewPath("metadata"))...)
allErrs = append(allErrs, ValidateSeedSpec(&seed.Spec, field.NewPath("spec"), false)...)
return allErrs
}
// ValidateSeedUpdate validates a Seed object before an update.
func ValidateSeedUpdate(newSeed, oldSeed *core.Seed) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&newSeed.ObjectMeta, &oldSeed.ObjectMeta, field.NewPath("metadata"))...)
allErrs = append(allErrs, ValidateSeedSpecUpdate(&newSeed.Spec, &oldSeed.Spec, field.NewPath("spec"))...)
allErrs = append(allErrs, ValidateSeed(newSeed)...)
return allErrs
}
// ValidateSeedTemplate validates a SeedTemplate.
func ValidateSeedTemplate(seedTemplate *core.SeedTemplate, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, metav1validation.ValidateLabels(seedTemplate.Labels, fldPath.Child("metadata", "labels"))...)
allErrs = append(allErrs, apivalidation.ValidateAnnotations(seedTemplate.Annotations, fldPath.Child("metadata", "annotations"))...)
allErrs = append(allErrs, ValidateSeedSpec(&seedTemplate.Spec, fldPath.Child("spec"), true)...)
return allErrs
}
// ValidateSeedTemplateUpdate validates a SeedTemplate before an update.
func ValidateSeedTemplateUpdate(newSeedTemplate, oldSeedTemplate *core.SeedTemplate, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, ValidateSeedSpecUpdate(&newSeedTemplate.Spec, &oldSeedTemplate.Spec, fldPath.Child("spec"))...)
return allErrs
}
// ValidateSeedSpec validates the specification of a Seed object.
func ValidateSeedSpec(seedSpec *core.SeedSpec, fldPath *field.Path, inTemplate bool) field.ErrorList {
allErrs := field.ErrorList{}
providerPath := fldPath.Child("provider")
if !inTemplate && len(seedSpec.Provider.Type) == 0 {
allErrs = append(allErrs, field.Required(providerPath.Child("type"), "must provide a provider type"))
}
if !inTemplate && len(seedSpec.Provider.Region) == 0 {
allErrs = append(allErrs, field.Required(providerPath.Child("region"), "must provide a provider region"))
}
zones := sets.New[string]()
for i, zone := range seedSpec.Provider.Zones {
if zones.Has(zone) {
allErrs = append(allErrs, field.Duplicate(providerPath.Child("zones").Index(i), zone))
break
}
zones.Insert(zone)
}
if seedSpec.SecretRef != nil {
allErrs = append(allErrs, validateSecretReference(*seedSpec.SecretRef, fldPath.Child("secretRef"))...)
}
allErrs = append(allErrs, validateSeedNetworks(seedSpec.Networks, fldPath.Child("networks"), inTemplate)...)
if seedSpec.Backup != nil {
if len(seedSpec.Backup.Provider) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("backup", "provider"), "must provide a backup cloud provider name"))
}
if seedSpec.Provider.Type != seedSpec.Backup.Provider && (seedSpec.Backup.Region == nil || len(*seedSpec.Backup.Region) == 0) {
allErrs = append(allErrs, field.Invalid(fldPath.Child("backup", "region"), "", "region must be specified for if backup provider is different from provider used in `spec.cloud`"))
}
allErrs = append(allErrs, validateSecretReference(seedSpec.Backup.SecretRef, fldPath.Child("backup", "secretRef"))...)
}
var keyValues = sets.New[string]()
for i, taint := range seedSpec.Taints {
idxPath := fldPath.Child("taints").Index(i)
if len(taint.Key) == 0 {
allErrs = append(allErrs, field.Required(idxPath.Child("key"), "cannot be empty"))
}
id := utils.IDForKeyWithOptionalValue(taint.Key, taint.Value)
if keyValues.Has(id) {
allErrs = append(allErrs, field.Duplicate(idxPath, id))
}
keyValues.Insert(id)
}
if seedSpec.Volume != nil {
if seedSpec.Volume.MinimumSize != nil {
allErrs = append(allErrs, ValidateResourceQuantityValue("minimumSize", *seedSpec.Volume.MinimumSize, fldPath.Child("volume", "minimumSize"))...)
}
volumeProviderPurposes := make(map[string]struct{}, len(seedSpec.Volume.Providers))
for i, provider := range seedSpec.Volume.Providers {
idxPath := fldPath.Child("volume", "providers").Index(i)
if len(provider.Purpose) == 0 {
allErrs = append(allErrs, field.Required(idxPath.Child("purpose"), "cannot be empty"))
}
if len(provider.Name) == 0 {
allErrs = append(allErrs, field.Required(idxPath.Child("name"), "cannot be empty"))
}
if _, ok := volumeProviderPurposes[provider.Purpose]; ok {
allErrs = append(allErrs, field.Duplicate(idxPath.Child("purpose"), provider.Purpose))
}
volumeProviderPurposes[provider.Purpose] = struct{}{}
}
}
if seedSpec.Settings != nil && seedSpec.Settings.LoadBalancerServices != nil {
allErrs = append(allErrs, apivalidation.ValidateAnnotations(seedSpec.Settings.LoadBalancerServices.Annotations, fldPath.Child("settings", "loadBalancerServices", "annotations"))...)
if policy := seedSpec.Settings.LoadBalancerServices.ExternalTrafficPolicy; policy != nil && !availableExternalTrafficPolicies.Has(string(*policy)) {
allErrs = append(allErrs, field.NotSupported(fldPath.Child("settings", "loadBalancerServices", "externalTrafficPolicy"), *policy, sets.List(availableExternalTrafficPolicies)))
}
if len(seedSpec.Provider.Zones) <= 1 && len(seedSpec.Settings.LoadBalancerServices.Zones) > 0 {
allErrs = append(allErrs, field.Forbidden(fldPath.Child("settings", "loadBalancerServices", "zones"), "zone-specific load balancer settings only allowed with at least two zones in spec.provider.zones"))
}
zones := sets.New[string](seedSpec.Provider.Zones...)
specifiedZones := sets.New[string]()
for i, zoneSettings := range seedSpec.Settings.LoadBalancerServices.Zones {
if !zones.Has(zoneSettings.Name) {
allErrs = append(allErrs, field.NotFound(fldPath.Child("settings", "loadBalancerServices", "zones").Index(i).Child("name"), zoneSettings.Name))
}
if specifiedZones.Has(zoneSettings.Name) {
allErrs = append(allErrs, field.Duplicate(fldPath.Child("settings", "loadBalancerServices", "zones").Index(i).Child("name"), zoneSettings.Name))
}
specifiedZones.Insert(zoneSettings.Name)
allErrs = append(allErrs, apivalidation.ValidateAnnotations(zoneSettings.Annotations, fldPath.Child("settings", "loadBalancerServices", "zones").Index(i).Child("annotations"))...)
if policy := zoneSettings.ExternalTrafficPolicy; policy != nil && !availableExternalTrafficPolicies.Has(string(*policy)) {
allErrs = append(allErrs, field.NotSupported(fldPath.Child("settings", "loadBalancerServices", "zones").Index(i).Child("externalTrafficPolicy"), *policy, sets.List(availableExternalTrafficPolicies)))
}
}
}
if seedSpec.DNS.IngressDomain != nil {
allErrs = append(allErrs, validateDNS1123Subdomain(*seedSpec.DNS.IngressDomain, fldPath.Child("dns", "ingressDomain"))...)
}
if !inTemplate && seedSpec.DNS.IngressDomain == nil && (seedSpec.Ingress == nil || len(seedSpec.Ingress.Domain) == 0) {
allErrs = append(allErrs, field.Invalid(fldPath, seedSpec, "either specify spec.ingress or spec.dns.ingressDomain"))
}
if seedSpec.Ingress != nil {
if seedSpec.DNS.IngressDomain != nil {
allErrs = append(allErrs, field.Invalid(fldPath.Child("dns", "ingressDomain"), "",
"Either specify spec.ingress.domain or spec.dns.ingressDomain"),
)
} else {
if !availableIngressKinds.Has(seedSpec.Ingress.Controller.Kind) {
allErrs = append(allErrs, field.NotSupported(
fldPath.Child("ingress", "controller", "kind"),
seedSpec.Ingress.Controller.Kind,
availableIngressKinds.UnsortedList()),
)
}
if seedSpec.DNS.Provider == nil {
allErrs = append(allErrs, field.Required(fldPath.Child("dns", "provider"),
"ingress controller requires dns.provider to be set"))
} else {
if len(seedSpec.DNS.Provider.Type) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("dns", "provider", "type"),
"DNS provider type must be set"))
}
if len(seedSpec.DNS.Provider.SecretRef.Name) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("dns", "provider", "secretRef", "name"),
"secret reference name must be set"))
}
if len(seedSpec.DNS.Provider.SecretRef.Namespace) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("dns", "provider", "secretRef", "namespace"),
"secret reference namespace must be set"))
}
}
allErrs = append(allErrs, validateDNS1123Subdomain(seedSpec.Ingress.Domain, fldPath.Child("ingress", "domain"))...)
}
}
return allErrs
}
func validateSeedNetworks(seedNetworks core.SeedNetworks, fldPath *field.Path, inTemplate bool) field.ErrorList {
allErrs := field.ErrorList{}
if errs := ValidateIPFamilies(seedNetworks.IPFamilies, fldPath.Child("ipFamilies")); len(errs) > 0 {
// further validation doesn't make any sense, because we don't know which IP family to check for in the CIDR fields
return append(allErrs, errs...)
}
var (
primaryIPFamily = helper.DeterminePrimaryIPFamily(seedNetworks.IPFamilies)
networks []cidrvalidation.CIDR
)
if !inTemplate || len(seedNetworks.Pods) > 0 {
networks = append(networks, cidrvalidation.NewCIDR(seedNetworks.Pods, fldPath.Child("pods")))
}
if !inTemplate || len(seedNetworks.Services) > 0 {
networks = append(networks, cidrvalidation.NewCIDR(seedNetworks.Services, fldPath.Child("services")))
}
if seedNetworks.Nodes != nil {
networks = append(networks, cidrvalidation.NewCIDR(*seedNetworks.Nodes, fldPath.Child("nodes")))
}
if shootDefaults := seedNetworks.ShootDefaults; shootDefaults != nil {
if shootDefaults.Pods != nil {
networks = append(networks, cidrvalidation.NewCIDR(*shootDefaults.Pods, fldPath.Child("shootDefaults", "pods")))
}
if shootDefaults.Services != nil {
networks = append(networks, cidrvalidation.NewCIDR(*shootDefaults.Services, fldPath.Child("shootDefaults", "services")))
}
}
allErrs = append(allErrs, cidrvalidation.ValidateCIDRParse(networks...)...)
allErrs = append(allErrs, cidrvalidation.ValidateCIDRIPFamily(networks, string(primaryIPFamily))...)
allErrs = append(allErrs, cidrvalidation.ValidateCIDROverlap(networks, false)...)
vpnRange := cidrvalidation.NewCIDR(v1beta1constants.DefaultVPNRange, field.NewPath(""))
allErrs = append(allErrs, vpnRange.ValidateNotOverlap(networks...)...)
return allErrs
}
// ValidateSeedSpecUpdate validates the specification updates of a Seed object.
func ValidateSeedSpecUpdate(newSeedSpec, oldSeedSpec *core.SeedSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, validateSeedNetworksUpdate(newSeedSpec.Networks, oldSeedSpec.Networks, fldPath.Child("networks"))...)
if oldSeedSpec.DNS.IngressDomain != nil && newSeedSpec.DNS.IngressDomain != nil {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(*newSeedSpec.DNS.IngressDomain, *oldSeedSpec.DNS.IngressDomain, fldPath.Child("dns", "ingressDomain"))...)
}
if oldSeedSpec.Ingress != nil && newSeedSpec.Ingress != nil {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedSpec.Ingress.Domain, oldSeedSpec.Ingress.Domain, fldPath.Child("ingress", "domain"))...)
}
if oldSeedSpec.Ingress != nil && newSeedSpec.DNS.IngressDomain != nil {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(*newSeedSpec.DNS.IngressDomain, oldSeedSpec.Ingress.Domain, fldPath.Child("dns", "ingressDomain"))...)
}
if oldSeedSpec.DNS.IngressDomain != nil && newSeedSpec.Ingress != nil {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedSpec.Ingress.Domain, *oldSeedSpec.DNS.IngressDomain, fldPath.Child("ingress", "domain"))...)
}
if oldSeedSpec.Backup != nil {
if newSeedSpec.Backup != nil {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedSpec.Backup.Provider, oldSeedSpec.Backup.Provider, fldPath.Child("backup", "provider"))...)
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedSpec.Backup.Region, oldSeedSpec.Backup.Region, fldPath.Child("backup", "region"))...)
} else {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedSpec.Backup, oldSeedSpec.Backup, fldPath.Child("backup"))...)
}
}
// If oldSeedSpec doesn't have backup configured, we allow to add it; but not the vice versa.
return allErrs
}
func validateSeedNetworksUpdate(newSeedNetworks, oldSeedNetworks core.SeedNetworks, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedNetworks.IPFamilies, oldSeedNetworks.IPFamilies, fldPath.Child("ipFamilies"))...)
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedNetworks.Pods, oldSeedNetworks.Pods, fldPath.Child("pods"))...)
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedNetworks.Services, oldSeedNetworks.Services, fldPath.Child("services"))...)
if oldSeedNetworks.Nodes != nil {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newSeedNetworks.Nodes, oldSeedNetworks.Nodes, fldPath.Child("nodes"))...)
}
return allErrs
}
// ValidateSeedStatusUpdate validates the status field of a Seed object.
func ValidateSeedStatusUpdate(newSeed, oldSeed *core.Seed) field.ErrorList {
var (
allErrs = field.ErrorList{}
fldPath = field.NewPath("status")
oldStatus = oldSeed.Status
newStatus = newSeed.Status
)
if oldStatus.ClusterIdentity != nil && !apiequality.Semantic.DeepEqual(oldStatus.ClusterIdentity, newStatus.ClusterIdentity) {
allErrs = append(allErrs, apivalidation.ValidateImmutableField(newStatus.ClusterIdentity, oldStatus.ClusterIdentity, fldPath.Child("clusterIdentity"))...)
}
return allErrs
}