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dnsentry.go
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dnsentry.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 dns
import (
"context"
"fmt"
"time"
"github.com/gardener/gardener/pkg/operation/botanist/component"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
"github.com/gardener/gardener/pkg/utils/retry"
dnsv1alpha1 "github.com/gardener/external-dns-management/pkg/apis/dns/v1alpha1"
"github.com/sirupsen/logrus"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
// EntryValues contains the values used to create a DNSEntry
type EntryValues struct {
Name string
DNSName string
Targets []string
OwnerID string
TTL int64
}
// NewEntry creates a new instance of DeployWaiter for a specific DNS emptyEntry.
// <waiter> is optional and it's defaulted to github.com/gardener/gardener/pkg/utils/retry.DefaultOps()
func NewEntry(
logger logrus.FieldLogger,
client client.Client,
namespace string,
values *EntryValues,
waiter retry.Ops,
) component.DeployWaiter {
if waiter == nil {
waiter = retry.DefaultOps()
}
return &entry{
logger: logger,
client: client,
namespace: namespace,
values: values,
waiter: waiter,
}
}
type entry struct {
logger logrus.FieldLogger
client client.Client
namespace string
values *EntryValues
waiter retry.Ops
}
func (e *entry) Deploy(ctx context.Context) error {
obj := e.emptyEntry()
_, err := controllerutil.CreateOrUpdate(ctx, e.client, obj, func() error {
obj.Spec = dnsv1alpha1.DNSEntrySpec{
DNSName: e.values.DNSName,
TTL: pointer.Int64Ptr(120),
Targets: e.values.Targets,
}
if e.values.TTL > 0 {
obj.Spec.TTL = &e.values.TTL
}
if len(e.values.OwnerID) > 0 {
obj.Spec.OwnerId = &e.values.OwnerID
}
return nil
})
return err
}
func (e *entry) Destroy(ctx context.Context) error {
return client.IgnoreNotFound(e.client.Delete(ctx, e.emptyEntry()))
}
func (e *entry) Wait(ctx context.Context) error {
var (
status string
message string
retryCountUntilSevere int
interval = 5 * time.Second
severeThreshold = 15 * time.Second
timeout = 2 * time.Minute
)
if err := e.waiter.UntilTimeout(ctx, interval, timeout, func(ctx context.Context) (done bool, err error) {
retryCountUntilSevere++
obj := &dnsv1alpha1.DNSEntry{}
if err2 := e.client.Get(ctx, client.ObjectKey{Name: e.values.Name, Namespace: e.namespace}, obj); err2 != nil {
if apierrors.IsNotFound(err2) {
return retry.MinorError(err2)
}
return retry.SevereError(err2)
}
if obj.Status.ObservedGeneration == obj.Generation && obj.Status.State == dnsv1alpha1.STATE_READY {
return retry.Ok()
}
status = obj.Status.State
if msg := obj.Status.Message; msg != nil {
message = *msg
}
entryErr := fmt.Errorf("DNS record %q is not ready (status=%s, message=%s)", e.values.Name, status, message)
e.logger.Infof("Waiting for %q DNS record to be ready... (status=%s, message=%s)", e.values.Name, status, message)
if status == dnsv1alpha1.STATE_ERROR || status == dnsv1alpha1.STATE_INVALID {
return retry.MinorOrSevereError(retryCountUntilSevere, int(severeThreshold.Nanoseconds()/interval.Nanoseconds()), entryErr)
}
return retry.MinorError(entryErr)
}); err != nil {
return fmt.Errorf("Failed to create %q DNS record: %q (status=%s, message=%s)", e.values.Name, err.Error(), status, message)
}
return nil
}
func (e *entry) WaitCleanup(ctx context.Context) error {
return kutil.WaitUntilResourceDeleted(ctx, e.client, e.emptyEntry(), 5*time.Second)
}
func (e *entry) emptyEntry() *dnsv1alpha1.DNSEntry {
return &dnsv1alpha1.DNSEntry{ObjectMeta: metav1.ObjectMeta{Name: e.values.Name, Namespace: e.namespace}}
}