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controlplane.go
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controlplane.go
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// Copyright (c) 2020 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 (
"fmt"
api "github.com/gardener/gardener-extension-provider-openstack/pkg/apis/openstack"
featurevalidation "github.com/gardener/gardener/pkg/utils/validation/features"
"k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/util/validation/field"
)
// ValidateControlPlaneConfig validates a ControlPlaneConfig object.
func ValidateControlPlaneConfig(controlPlaneConfig *api.ControlPlaneConfig, version string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if len(controlPlaneConfig.LoadBalancerProvider) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("loadBalancerProvider"), "must provide the name of a load balancer provider"))
}
loadBalancerClassPath := fldPath.Child("loadBalancerClasses")
allErrs = append(allErrs, ValidateLoadBalancerClasses(controlPlaneConfig.LoadBalancerClasses, loadBalancerClassPath)...)
for i, class := range controlPlaneConfig.LoadBalancerClasses {
// Do not allow that the user specify a vpn LoadBalancerClass in the controlplane config.
// It need to come from the CloudProfile.
if class.Purpose != nil && *class.Purpose == api.VPNLoadBalancerClass {
allErrs = append(allErrs, field.Invalid(loadBalancerClassPath.Index(i), class.Purpose, fmt.Sprintf("not allowed to specify a LoadBalancerClass with purpose %q", api.VPNLoadBalancerClass)))
}
}
if controlPlaneConfig.CloudControllerManager != nil {
allErrs = append(allErrs, featurevalidation.ValidateFeatureGates(controlPlaneConfig.CloudControllerManager.FeatureGates, version, fldPath.Child("cloudControllerManager", "featureGates"))...)
}
return allErrs
}
// ValidateControlPlaneConfigUpdate validates a ControlPlaneConfig object.
func ValidateControlPlaneConfigUpdate(oldConfig, newConfig *api.ControlPlaneConfig, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
return allErrs
}
// ValidateControlPlaneConfigAgainstCloudProfile validates the given ControlPlaneConfig against constraints in the given CloudProfile.
func ValidateControlPlaneConfigAgainstCloudProfile(oldCpConfig, cpConfig *api.ControlPlaneConfig, domain, shootRegion, floatingPoolName string, cloudProfileConfig *api.CloudProfileConfig, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if oldCpConfig == nil || oldCpConfig.LoadBalancerProvider != cpConfig.LoadBalancerProvider {
if ok, validLoadBalancerProviders := validateLoadBalancerProviderConstraints(cloudProfileConfig.Constraints.LoadBalancerProviders, shootRegion, cpConfig.LoadBalancerProvider); !ok {
allErrs = append(allErrs, field.NotSupported(fldPath.Child("loadBalancerProvider"), cpConfig.LoadBalancerProvider, validLoadBalancerProviders))
}
}
if oldCpConfig == nil || !equality.Semantic.DeepEqual(oldCpConfig.LoadBalancerClasses, cpConfig.LoadBalancerClasses) {
allErrs = append(allErrs, validateLoadBalancerClassesConstraints(cloudProfileConfig.Constraints.FloatingPools, cpConfig.LoadBalancerClasses, domain, shootRegion, floatingPoolName, fldPath.Child("loadBalancerClasses"))...)
}
return allErrs
}
func validateLoadBalancerProviderConstraints(providers []api.LoadBalancerProvider, region, provider string) (bool, []string) {
var (
validValues = []string{}
fallback *api.LoadBalancerProvider
)
for _, p := range providers {
// store the first non-regional image for fallback value if no load balancer provider for the given
// region was found
if p.Region == nil && fallback == nil {
v := p
fallback = &v
continue
}
// load balancer provider for the given region found, validate it
if p.Region != nil && *p.Region == region {
validValues = append(validValues, p.Name)
if p.Name == provider {
return true, nil
}
return false, validValues
}
}
// no load balancer provider for the given region found yet, check if the non-regional fallback is used
if fallback != nil {
validValues = append(validValues, fallback.Name)
if fallback.Name == provider {
return true, nil
}
}
return false, validValues
}
func validateLoadBalancerClassesConstraints(floatingPools []api.FloatingPool, shootLBClasses []api.LoadBalancerClass, domain, shootRegion, floatingPoolName string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if len(shootLBClasses) == 0 {
return allErrs
}
fp, errs := FindFloatingPool(floatingPools, domain, shootRegion, floatingPoolName, fldPath)
if len(errs) > 0 {
allErrs = append(allErrs, field.Invalid(field.NewPath("floatingPoolName"), floatingPoolName, errs.ToAggregate().Error()))
return allErrs
}
if len(fp.LoadBalancerClasses) == 0 {
return allErrs
}
for i, shootLBClass := range shootLBClasses {
var (
valid bool
validValues []string
)
for _, lbClass := range fp.LoadBalancerClasses {
if shootLBClass.IsSemanticallyEqual(lbClass) {
valid = true
break
}
validValues = append(validValues, fmt.Sprint(lbClass))
}
if !valid {
allErrs = append(allErrs, field.NotSupported(fldPath.Index(i), shootLBClass, validValues))
}
}
return allErrs
}