/
extension.go
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/
extension.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 extension
import (
"context"
"time"
gardencorev1alpha1 "github.com/gardener/gardener/pkg/apis/core/v1alpha1"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils"
"github.com/gardener/gardener/pkg/extensions"
"github.com/gardener/gardener/pkg/operation/botanist/component"
"github.com/gardener/gardener/pkg/utils/flow"
"github.com/sirupsen/logrus"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/sets"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
// DefaultInterval is the default interval for retry operations.
DefaultInterval = 5 * time.Second
// DefaultSevereThreshold is the default threshold until an error reported by another component is treated as 'severe'.
DefaultSevereThreshold = 30 * time.Second
// DefaultTimeout is the default timeout and defines how long Gardener should wait
// for a successful reconciliation of an Extension resource.
DefaultTimeout = 3 * time.Minute
)
// TimeNow returns the current time. Exposed for testing.
var TimeNow = time.Now
// Interface contains references to an Extension deployer.
type Interface interface {
component.DeployMigrateWaiter
// DeleteStaleResources deletes unused Extension resources from the shoot namespace in the seed.
DeleteStaleResources(context.Context) error
// WaitCleanupStaleResources waits until all unused Extension resources are cleaned up.
WaitCleanupStaleResources(context.Context) error
// Extensions returns the map of extensions where the key is the type and the value is an Extension structure.
Extensions() map[string]Extension
}
// Extension contains information about the desired Extension resources as well as configuration information.
type Extension struct {
extensionsv1alpha1.Extension
// Timeout is the maximum waiting time for the Extension status to report readiness.
Timeout time.Duration
}
// Values contains the values used to create an Extension resources.
type Values struct {
// Namespace is the namespace into which the Extension resources should be deployed.
Namespace string
// Extensions is the map of extensions where the key is the type and the value is an Extension structure.
Extensions map[string]Extension
}
type extension struct {
values *Values
client client.Client
logger logrus.FieldLogger
waitInterval time.Duration
waitSevereThreshold time.Duration
waitTimeout time.Duration
extensions map[string]*extensionsv1alpha1.Extension
}
// New creates a new instance of Extension deployer.
func New(
logger logrus.FieldLogger,
client client.Client,
values *Values,
waitInterval time.Duration,
waitSevereThreshold time.Duration,
waitTimeout time.Duration,
) Interface {
return &extension{
values: values,
client: client,
logger: logger,
waitInterval: waitInterval,
waitSevereThreshold: waitSevereThreshold,
waitTimeout: waitTimeout,
extensions: make(map[string]*extensionsv1alpha1.Extension),
}
}
// Deploy uses the seed client to create or update the Extension resources.
func (e *extension) Deploy(ctx context.Context) error {
fns := e.forEach(func(ctx context.Context, ext *extensionsv1alpha1.Extension, extType string, providerConfig *runtime.RawExtension, _ time.Duration) error {
_, err := e.deploy(ctx, ext, extType, providerConfig, v1beta1constants.GardenerOperationReconcile)
return err
})
return flow.Parallel(fns...)(ctx)
}
func (e *extension) deploy(ctx context.Context, ext *extensionsv1alpha1.Extension, extType string, providerConfig *runtime.RawExtension, operation string) (extensionsv1alpha1.Object, error) {
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, e.client, ext, func() error {
metav1.SetMetaDataAnnotation(&ext.ObjectMeta, v1beta1constants.GardenerOperation, operation)
metav1.SetMetaDataAnnotation(&ext.ObjectMeta, v1beta1constants.GardenerTimestamp, TimeNow().UTC().String())
ext.Spec.Type = extType
ext.Spec.ProviderConfig = providerConfig
return nil
})
return ext, err
}
// Destroy deletes all the Extension resources.
func (e *extension) Destroy(ctx context.Context) error {
return e.deleteExtensionResources(ctx, sets.NewString())
}
// Wait waits until the Extension resources are ready.
func (e *extension) Wait(ctx context.Context) error {
fns := e.forEach(func(ctx context.Context, ext *extensionsv1alpha1.Extension, _ string, _ *runtime.RawExtension, timeout time.Duration) error {
return extensions.WaitUntilExtensionObjectReady(
ctx,
e.client,
e.logger,
ext,
extensionsv1alpha1.ExtensionResource,
e.waitInterval,
e.waitSevereThreshold,
timeout,
nil,
)
})
return flow.ParallelExitOnError(fns...)(ctx)
}
// WaitCleanup waits until the Extension resources are cleaned up.
func (e *extension) WaitCleanup(ctx context.Context) error {
return e.waitCleanup(ctx, sets.NewString())
}
// Restore uses the seed client and the ShootState to create the Extension resources and restore their state.
func (e *extension) Restore(ctx context.Context, shootState *gardencorev1alpha1.ShootState) error {
fns := e.forEach(func(ctx context.Context, ext *extensionsv1alpha1.Extension, extType string, providerConfig *runtime.RawExtension, _ time.Duration) error {
return extensions.RestoreExtensionWithDeployFunction(
ctx,
e.client,
shootState,
extensionsv1alpha1.ExtensionResource,
func(ctx context.Context, operationAnnotation string) (extensionsv1alpha1.Object, error) {
return e.deploy(ctx, ext, extType, providerConfig, operationAnnotation)
},
)
})
return flow.Parallel(fns...)(ctx)
}
// Migrate migrates the Extension resources.
func (e *extension) Migrate(ctx context.Context) error {
return extensions.MigrateExtensionObjects(
ctx,
e.client,
&extensionsv1alpha1.ExtensionList{},
e.values.Namespace,
)
}
// WaitMigrate waits until the Extension resources are migrated successfully.
func (e *extension) WaitMigrate(ctx context.Context) error {
return extensions.WaitUntilExtensionObjectsMigrated(
ctx,
e.client,
&extensionsv1alpha1.ExtensionList{},
e.values.Namespace,
e.waitInterval,
e.waitTimeout,
)
}
// DeleteStaleResources deletes unused Extension resources from the shoot namespace in the seed.
func (e *extension) DeleteStaleResources(ctx context.Context) error {
return e.deleteExtensionResources(ctx, e.getWantedExtensionTypes())
}
// WaitCleanupStaleResources waits until all unused Extension resources are cleaned up.
func (e *extension) WaitCleanupStaleResources(ctx context.Context) error {
return e.waitCleanup(ctx, e.getWantedExtensionTypes())
}
func (e *extension) deleteExtensionResources(ctx context.Context, wantedExtensionTypes sets.String) error {
return extensions.DeleteExtensionObjects(
ctx,
e.client,
&extensionsv1alpha1.ExtensionList{},
e.values.Namespace,
func(obj extensionsv1alpha1.Object) bool {
return !wantedExtensionTypes.Has(obj.GetExtensionSpec().GetExtensionType())
},
)
}
func (e *extension) waitCleanup(ctx context.Context, wantedExtensionTypes sets.String) error {
return extensions.WaitUntilExtensionObjectsDeleted(
ctx,
e.client,
e.logger,
&extensionsv1alpha1.ExtensionList{},
extensionsv1alpha1.ExtensionResource,
e.values.Namespace,
e.waitInterval,
e.waitTimeout,
func(obj extensionsv1alpha1.Object) bool {
return !wantedExtensionTypes.Has(obj.GetExtensionSpec().GetExtensionType())
},
)
}
// getWantedExtensionTypes returns the types of all extension resources, that are currently needed based
// on the configured shoot settings and globally enabled extensions.
func (e *extension) getWantedExtensionTypes() sets.String {
wantedExtensionTypes := sets.NewString()
for _, ext := range e.values.Extensions {
wantedExtensionTypes.Insert(ext.Spec.Type)
}
return wantedExtensionTypes
}
func (e *extension) forEach(fn func(ctx context.Context, ext *extensionsv1alpha1.Extension, extType string, providerConfig *runtime.RawExtension, timeout time.Duration) error) []flow.TaskFn {
fns := make([]flow.TaskFn, 0, len(e.values.Extensions))
for _, ext := range e.values.Extensions {
extensionTemplate := ext
extensionObj, ok := e.extensions[extensionTemplate.Name]
if !ok {
extensionObj = &extensionsv1alpha1.Extension{
ObjectMeta: metav1.ObjectMeta{
Name: extensionTemplate.Name,
Namespace: e.values.Namespace,
},
}
// store object for later usage (we want to pass a filled object to WaitUntil*)
e.extensions[extensionTemplate.Name] = extensionObj
}
fns = append(fns, func(ctx context.Context) error {
return fn(ctx, extensionObj, extensionTemplate.Spec.Type, extensionTemplate.Spec.ProviderConfig, extensionTemplate.Timeout)
})
}
return fns
}
// Extensions returns the map of extensions where the key is the type and the value is an Extension structure.
func (e *extension) Extensions() map[string]Extension {
return e.values.Extensions
}