/
extensions.go
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/
extensions.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 common
import (
"context"
"errors"
"fmt"
"time"
"github.com/gardener/gardener/pkg/api/extensions"
gardencorev1beta1helper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/utils/flow"
"github.com/gardener/gardener/pkg/utils/kubernetes/health"
"github.com/gardener/gardener/pkg/utils/retry"
"github.com/sirupsen/logrus"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// WaitUntilExtensionCRReady waits until the given extension resource has become ready.
func WaitUntilExtensionCRReady(
ctx context.Context,
c client.Client,
logger *logrus.Entry,
newObjFunc func() runtime.Object,
kind string,
namespace string,
name string,
interval time.Duration,
severeThreshold time.Duration,
timeout time.Duration,
postReadyFunc func(runtime.Object) error,
) error {
return WaitUntilObjectReadyWithHealthFunction(
ctx,
c,
logger,
health.CheckExtensionObject,
newObjFunc,
kind,
namespace,
name,
interval,
severeThreshold,
timeout,
postReadyFunc,
)
}
// WaitUntilObjectReadyWithHealthFunction waits until the given resource has become ready. It takes the health check
// function that should be executed.
func WaitUntilObjectReadyWithHealthFunction(
ctx context.Context,
c client.Client,
logger *logrus.Entry,
healthFunc func(obj runtime.Object) error,
newObjFunc func() runtime.Object,
kind string,
namespace string,
name string,
interval time.Duration,
severeThreshold time.Duration,
timeout time.Duration,
postReadyFunc func(runtime.Object) error,
) error {
var (
errorWithCode *gardencorev1beta1helper.ErrorWithCodes
lastObservedError error
retryCountUntilSevere int
)
if err := retry.UntilTimeout(ctx, interval, timeout, func(ctx context.Context) (bool, error) {
retryCountUntilSevere++
obj := newObjFunc()
if err := c.Get(ctx, client.ObjectKey{Name: name, Namespace: namespace}, obj); err != nil {
return retry.SevereError(err)
}
if err := healthFunc(obj); err != nil {
lastObservedError = err
logger.WithError(err).Errorf("%s did not get ready yet", extensionKey(kind, namespace, name))
if errors.As(err, &errorWithCode) {
return retry.MinorOrSevereError(retryCountUntilSevere, int(severeThreshold.Nanoseconds()/interval.Nanoseconds()), err)
}
return retry.MinorError(err)
}
if postReadyFunc != nil {
if err := postReadyFunc(obj); err != nil {
return retry.SevereError(err)
}
}
return retry.Ok()
}); err != nil {
message := fmt.Sprintf("Error while waiting for %s to become ready", extensionKey(kind, namespace, name))
if lastObservedError != nil {
return gardencorev1beta1helper.NewErrorWithCodes(formatErrorMessage(message, lastObservedError.Error()), gardencorev1beta1helper.ExtractErrorCodes(lastObservedError)...)
}
return errors.New(formatErrorMessage(message, err.Error()))
}
return nil
}
// DeleteExtensionCR deletes an extension resource.
func DeleteExtensionCR(
ctx context.Context,
c client.Client,
newObjFunc func() extensionsv1alpha1.Object,
namespace string,
name string,
deleteOpts ...client.DeleteOption,
) error {
obj := newObjFunc()
obj.SetNamespace(namespace)
obj.SetName(name)
if err := ConfirmDeletion(ctx, c, obj); err != nil {
return err
}
if err := client.IgnoreNotFound(c.Delete(ctx, obj, deleteOpts...)); err != nil {
return err
}
return nil
}
// DeleteExtensionCRs lists all extension resources and loops over them. It executes the given <predicateFunc> for each
// of them, and if it evaluates to true then the resource will be deleted.
func DeleteExtensionCRs(
ctx context.Context,
c client.Client,
listObj runtime.Object,
newObjFunc func() extensionsv1alpha1.Object,
namespace string,
predicateFunc func(obj extensionsv1alpha1.Object) bool,
deleteOpts ...client.DeleteOption,
) error {
if err := c.List(ctx, listObj, client.InNamespace(namespace)); err != nil {
return err
}
fns := make([]flow.TaskFn, 0, meta.LenList(listObj))
if err := meta.EachListItem(listObj, func(obj runtime.Object) error {
o, ok := obj.(extensionsv1alpha1.Object)
if !ok {
return fmt.Errorf("expected extensionsv1alpha1.Object but got %T", obj)
}
if predicateFunc != nil && !predicateFunc(o) {
return nil
}
fns = append(fns, func(ctx context.Context) error {
return DeleteExtensionCR(ctx, c, newObjFunc, o.GetNamespace(), o.GetName(), deleteOpts...)
})
return nil
}); err != nil {
return err
}
return flow.Parallel(fns...)(ctx)
}
// WaitUntilExtensionCRsDeleted lists all extension resources and loops over them. It executes the given <predicateFunc>
// for each of them, and if it evaluates to true then it waits for the resource to be deleted.
func WaitUntilExtensionCRsDeleted(
ctx context.Context,
c client.Client,
logger *logrus.Entry,
listObj runtime.Object,
newObjFunc func() extensionsv1alpha1.Object,
kind string,
namespace string,
interval time.Duration,
timeout time.Duration,
predicateFunc func(obj extensionsv1alpha1.Object) bool,
) error {
if err := c.List(ctx, listObj, client.InNamespace(namespace)); err != nil {
return err
}
fns := make([]flow.TaskFn, 0, meta.LenList(listObj))
if err := meta.EachListItem(listObj, func(obj runtime.Object) error {
o, ok := obj.(extensionsv1alpha1.Object)
if !ok {
return fmt.Errorf("expected extensionsv1alpha1.Object but got %T", obj)
}
if o.GetDeletionTimestamp() == nil {
return nil
}
if predicateFunc != nil && !predicateFunc(o) {
return nil
}
fns = append(fns, func(ctx context.Context) error {
return WaitUntilExtensionCRDeleted(
ctx,
c,
logger,
newObjFunc,
kind,
o.GetNamespace(),
o.GetName(),
interval,
timeout,
)
})
return nil
}); err != nil {
return err
}
return flow.Parallel(fns...)(ctx)
}
// WaitUntilExtensionCRDeleted waits until an extension resource is deleted from the system.
func WaitUntilExtensionCRDeleted(
ctx context.Context,
c client.Client,
logger *logrus.Entry,
newObjFunc func() extensionsv1alpha1.Object,
kind string,
namespace string,
name string,
interval time.Duration,
timeout time.Duration,
) error {
var lastObservedError error
if err := retry.UntilTimeout(ctx, interval, timeout, func(ctx context.Context) (bool, error) {
obj := newObjFunc()
if err := c.Get(ctx, client.ObjectKey{Name: name, Namespace: namespace}, obj); err != nil {
if apierrors.IsNotFound(err) {
return retry.Ok()
}
return retry.SevereError(err)
}
acc, err := extensions.Accessor(obj)
if err != nil {
return retry.SevereError(err)
}
if lastErr := acc.GetExtensionStatus().GetLastError(); lastErr != nil {
logger.Errorf("%s did not get deleted yet, lastError is: %s", extensionKey(kind, namespace, name), lastErr.Description)
lastObservedError = gardencorev1beta1helper.NewErrorWithCodes(lastErr.Description, lastErr.Codes...)
}
var message = fmt.Sprintf("%s is still present", extensionKey(kind, namespace, name))
if lastObservedError != nil {
message += fmt.Sprintf(", last observed error: %s", lastObservedError.Error())
}
return retry.MinorError(fmt.Errorf(message))
}); err != nil {
message := fmt.Sprintf("Failed to delete %s", extensionKey(kind, namespace, name))
if lastObservedError != nil {
return gardencorev1beta1helper.NewErrorWithCodes(formatErrorMessage(message, lastObservedError.Error()), gardencorev1beta1helper.ExtractErrorCodes(lastObservedError)...)
}
return errors.New(formatErrorMessage(message, err.Error()))
}
return nil
}
func extensionKey(kind, namespace, name string) string {
return fmt.Sprintf("%s %s/%s", kind, namespace, name)
}
func formatErrorMessage(message, description string) string {
return fmt.Sprintf("%s: %s", message, description)
}