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state_zonepolicy.go
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/
state_zonepolicy.go
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/*
* Copyright 2021 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 provider
import (
"fmt"
"reflect"
"sort"
"strings"
"time"
"github.com/gardener/controller-manager-library/pkg/controllermanager/controller/reconcile"
"github.com/gardener/controller-manager-library/pkg/logger"
"github.com/gardener/controller-manager-library/pkg/resources"
utils2 "github.com/gardener/controller-manager-library/pkg/utils"
api "github.com/gardener/external-dns-management/pkg/apis/dns/v1alpha1"
"github.com/gardener/external-dns-management/pkg/dns"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
dnsutils "github.com/gardener/external-dns-management/pkg/dns/utils"
)
////////////////////////////////////////////////////////////////////////////////
// state handling for DNSHostedZonePolicies
////////////////////////////////////////////////////////////////////////////////
func (this *state) UpdateZonePolicy(logger logger.LogContext, policy *dnsutils.DNSHostedZonePolicyObject) reconcile.Status {
zones, conflicts := this.updateZonePolicyState(logger, policy)
err := this.updateZonePolicyStatus(policy, zones, conflicts)
if err != nil {
reconcile.Delay(logger, err)
}
return reconcile.Succeeded(logger)
}
func (this *state) updateZonePolicyState(logger logger.LogContext, policy *dnsutils.DNSHostedZonePolicyObject) ([]api.ZoneInfo, []string) {
this.lock.Lock()
defer this.lock.Unlock()
name := policy.GetName()
pol := this.zonePolicies[name]
if pol == nil {
pol = newDNSHostedZonePolicy(name, policy.Spec())
this.zonePolicies[name] = pol
} else {
pol.spec = *policy.Spec()
}
var conflicts []string
var zones []api.ZoneInfo
pol.zones = nil
pol.conflictingPolicyNames.Clear()
for _, zone := range this.zones {
if matchesPolicySelector(pol, zone) {
if zpol := zone.Policy(); zpol == nil {
zone.SetPolicy(pol)
logger.Infof("added zone %s to policy %s", zone.Id(), name)
} else if zpol != pol {
zname := zpol.name
s := fmt.Sprintf("zone %s has conflicting policy selection: %s", zone.Id(), zname)
conflicts = append(conflicts, s)
pol.conflictingPolicyNames.Add(zname)
zpol.conflictingPolicyNames.Add(name)
}
} else if zone.Policy() == pol {
zone.SetPolicy(nil)
logger.Infof("removed zone %s to policy %s", zone.Id(), name)
}
if zone.Policy() == pol {
pol.zones = append(pol.zones, zone)
zones = append(zones, api.ZoneInfo{
ZoneID: zone.Id().ID,
ProviderType: zone.Id().ProviderType,
DomainName: zone.Domain(),
})
}
}
this.updateStateTTLMap()
return zones, conflicts
}
func (this *state) updateStateTTLMap() {
new := map[dns.ZoneID]time.Duration{}
for _, zone := range this.zones {
if zpol := zone.Policy(); zpol != nil {
if zpol.spec.Policy.ZoneStateCacheTTL != nil {
new[zone.Id()] = zpol.spec.Policy.ZoneStateCacheTTL.Duration
}
}
}
this.zoneStateTTL.Store(new)
}
func (this *state) RemoveZonePolicy(logger logger.LogContext, policy *dnsutils.DNSHostedZonePolicyObject) reconcile.Status {
key := this.createZonePolicyClusterKey(policy.GetName())
return this.ZonePolicyDeleted(logger, key)
}
func (this *state) ZonePolicyDeleted(logger logger.LogContext, key resources.ClusterObjectKey) reconcile.Status {
this.lock.Lock()
defer this.lock.Unlock()
name := key.Name()
if pol := this.zonePolicies[name]; pol != nil {
for _, zone := range pol.zones {
zone.SetPolicy(nil)
}
for zname := range pol.conflictingPolicyNames {
key := this.createZonePolicyClusterKey(zname)
this.triggerKey(key)
}
this.updateStateTTLMap()
delete(this.zonePolicies, name)
}
return reconcile.Succeeded(logger)
}
func (this *state) updateZonePolicyStatus(policy *dnsutils.DNSHostedZonePolicyObject,
zones []api.ZoneInfo, conflicts []string) error {
var pmsg *string
if len(conflicts) > 0 {
sort.Strings(conflicts)
msg := strings.Join(conflicts, ", ")
pmsg = &msg
}
sort.Slice(zones, func(i, j int) bool {
return zones[i].DomainName < zones[j].DomainName ||
zones[i].DomainName == zones[j].DomainName && zones[i].ZoneID < zones[j].ZoneID
})
status := policy.Status()
mod := &utils2.ModificationState{}
mod.AssureStringPtrPtr(&status.Message, pmsg)
if !reflect.DeepEqual(status.Zones, zones) {
status.Zones = zones
n := len(zones)
status.Count = &n
mod.Modify(true)
}
if mod.IsModified() {
status.LastStatusUpdateTime = &metav1.Time{Time: time.Now()}
return policy.UpdateStatus()
}
return nil
}
func (this *state) triggerAllZonePolicies() {
for id := range this.zonePolicies {
key := this.createZonePolicyClusterKey(id)
this.triggerKey(key)
}
}
func (this *state) createZonePolicyClusterKey(name string) resources.ClusterObjectKey {
providerClusterID := this.context.GetCluster(PROVIDER_CLUSTER).GetId()
return resources.NewClusterKey(providerClusterID, zonePolicyGroupKind, "", name)
}
func matchesPolicySelector(pol *dnsHostedZonePolicy, zone *dnsHostedZone) bool {
selector := &pol.spec.Selector
found := findFullMatch(selector.ZoneIDs, zone.Id().ID)
found = found && findFullMatch(selector.ProviderTypes, zone.Id().ProviderType)
found = found && findFullMatch(selector.DomainNames, zone.Domain())
return found
}
func findFullMatch(list []string, key string) bool {
if len(list) == 0 {
return true
}
for _, item := range list {
if item == key {
return true
}
}
return false
}