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containerruntime.go
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/
containerruntime.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 containerruntime
import (
"context"
"fmt"
"time"
gardencorev1alpha1 "github.com/gardener/gardener/pkg/apis/core/v1alpha1"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"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/util/sets"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
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 a containerruntime resource.
DefaultTimeout = 3 * time.Minute
)
// TimeNow returns the current time. Exposed for testing.
var TimeNow = time.Now
// Interface is an interface for managing ContainerRuntimes.
type Interface interface {
component.DeployMigrateWaiter
DeleteStaleResources(ctx context.Context) error
}
// Values contains the values used to create a ContainerRuntime resources.
type Values struct {
// Namespace is the namespace for the ContainerRuntime resource.
Namespace string
// Workers is the list of worker pools.
Workers []gardencorev1beta1.Worker
}
type containerRuntime struct {
values *Values
client client.Client
logger logrus.FieldLogger
waitInterval time.Duration
waitSevereThreshold time.Duration
waitTimeout time.Duration
}
// New creates a new instance of Interface.
func New(
logger logrus.FieldLogger,
client client.Client,
values *Values,
waitInterval time.Duration,
waitSevereThreshold time.Duration,
waitTimeout time.Duration,
) Interface {
return &containerRuntime{
values: values,
client: client,
logger: logger,
waitInterval: waitInterval,
waitSevereThreshold: waitSevereThreshold,
waitTimeout: waitTimeout,
}
}
// Deploy uses the seed client to create or update the ContainerRuntime resources.
func (c *containerRuntime) Deploy(ctx context.Context) error {
fns := c.forEachContainerRuntime(func(ctx context.Context, workerName string, cr gardencorev1beta1.ContainerRuntime) error {
rd := resourceDeployer{c.values.Namespace, workerName, cr, c.client}
_, err := rd.deploy(ctx, v1beta1constants.GardenerOperationReconcile)
return err
})
return flow.Parallel(fns...)(ctx)
}
// Destroy deletes the ContainerRuntime resources.
func (c *containerRuntime) Destroy(ctx context.Context) error {
return c.deleteContainerRuntimeResources(ctx, sets.NewString())
}
// Wait waits until the ContainerRuntime resources are ready.
func (c *containerRuntime) Wait(ctx context.Context) error {
fns := c.forEachContainerRuntime(func(ctx context.Context, workerName string, cr gardencorev1beta1.ContainerRuntime) error {
return extensions.WaitUntilExtensionCRReady(
ctx,
c.client,
c.logger,
func() client.Object { return &extensionsv1alpha1.ContainerRuntime{} },
extensionsv1alpha1.ContainerRuntimeResource,
c.values.Namespace,
getContainerRuntimeKey(cr.Type, workerName),
c.waitInterval,
c.waitSevereThreshold,
c.waitTimeout,
nil,
)
})
return flow.ParallelExitOnError(fns...)(ctx)
}
// WaitCleanup waits until the ContainerRuntime resources are cleaned up.
func (c *containerRuntime) WaitCleanup(ctx context.Context) error {
return extensions.WaitUntilExtensionCRsDeleted(
ctx,
c.client,
c.logger,
&extensionsv1alpha1.ContainerRuntimeList{},
func() extensionsv1alpha1.Object { return &extensionsv1alpha1.ContainerRuntime{} },
extensionsv1alpha1.ContainerRuntimeResource,
c.values.Namespace,
c.waitInterval,
c.waitTimeout,
nil,
)
}
// Restore uses the seed client and the ShootState to create the ContainerRuntime resources and restore their state.
func (c *containerRuntime) Restore(ctx context.Context, shootState *gardencorev1alpha1.ShootState) error {
fns := c.forEachContainerRuntime(func(ctx context.Context, workerName string, cr gardencorev1beta1.ContainerRuntime) error {
rd := resourceDeployer{c.values.Namespace, workerName, cr, c.client}
return extensions.RestoreExtensionWithDeployFunction(ctx, c.client, shootState, extensionsv1alpha1.ContainerRuntimeResource, c.values.Namespace, rd.deploy)
})
return flow.Parallel(fns...)(ctx)
}
// Migrate migrates the ContainerRuntime resources.
func (c *containerRuntime) Migrate(ctx context.Context) error {
return extensions.MigrateExtensionCRs(
ctx,
c.client,
&extensionsv1alpha1.ContainerRuntimeList{},
func() extensionsv1alpha1.Object { return &extensionsv1alpha1.ContainerRuntime{} },
c.values.Namespace,
)
}
// WaitMigrate waits until the ContainerRuntime resources are migrated successfully.
func (c *containerRuntime) WaitMigrate(ctx context.Context) error {
return extensions.WaitUntilExtensionCRsMigrated(
ctx,
c.client,
&extensionsv1alpha1.ContainerRuntimeList{},
func() extensionsv1alpha1.Object { return &extensionsv1alpha1.ContainerRuntime{} },
c.values.Namespace,
c.waitInterval,
c.waitTimeout,
)
}
// DeleteStaleResources deletes unused container runtime resources from the shoot namespace in the seed.
func (c *containerRuntime) DeleteStaleResources(ctx context.Context) error {
wantedContainerRuntimeTypes := sets.NewString()
for _, worker := range c.values.Workers {
if worker.CRI != nil {
for _, containerRuntime := range worker.CRI.ContainerRuntimes {
key := getContainerRuntimeKey(containerRuntime.Type, worker.Name)
wantedContainerRuntimeTypes.Insert(key)
}
}
}
return c.deleteContainerRuntimeResources(ctx, wantedContainerRuntimeTypes)
}
func (c *containerRuntime) deleteContainerRuntimeResources(ctx context.Context, wantedContainerRuntimeTypes sets.String) error {
return extensions.DeleteExtensionCRs(
ctx,
c.client,
&extensionsv1alpha1.ContainerRuntimeList{},
func() extensionsv1alpha1.Object { return &extensionsv1alpha1.ContainerRuntime{} },
c.values.Namespace,
func(obj extensionsv1alpha1.Object) bool {
cr, ok := obj.(*extensionsv1alpha1.ContainerRuntime)
if !ok {
return false
}
return !wantedContainerRuntimeTypes.Has(getContainerRuntimeKey(cr.Spec.Type, cr.Spec.WorkerPool.Name))
},
)
}
func (c *containerRuntime) forEachContainerRuntime(fn func(ctx context.Context, workerName string, cr gardencorev1beta1.ContainerRuntime) error) []flow.TaskFn {
var fns []flow.TaskFn
for _, worker := range c.values.Workers {
if worker.CRI == nil {
continue
}
for _, containerRuntime := range worker.CRI.ContainerRuntimes {
cr := containerRuntime
workerName := worker.Name
fns = append(fns, func(ctx context.Context) error {
return fn(ctx, workerName, cr)
})
}
}
return fns
}
func getContainerRuntimeKey(criType, workerName string) string {
return fmt.Sprintf("%s-%s", criType, workerName)
}
type resourceDeployer struct {
namespace string
workerName string
containerRuntime gardencorev1beta1.ContainerRuntime
client client.Client
}
func (d *resourceDeployer) deploy(ctx context.Context, operation string) (extensionsv1alpha1.Object, error) {
toApply := extensionsv1alpha1.ContainerRuntime{
ObjectMeta: metav1.ObjectMeta{
Name: getContainerRuntimeKey(d.containerRuntime.Type, d.workerName),
Namespace: d.namespace,
},
}
_, err := controllerutil.CreateOrUpdate(ctx, d.client, &toApply, func() error {
metav1.SetMetaDataAnnotation(&toApply.ObjectMeta, v1beta1constants.GardenerOperation, operation)
metav1.SetMetaDataAnnotation(&toApply.ObjectMeta, v1beta1constants.GardenerTimestamp, TimeNow().UTC().String())
toApply.Spec.BinaryPath = extensionsv1alpha1.ContainerDRuntimeContainersBinFolder
toApply.Spec.Type = d.containerRuntime.Type
toApply.Spec.ProviderConfig = d.containerRuntime.ProviderConfig
toApply.Spec.WorkerPool.Name = d.workerName
toApply.Spec.WorkerPool.Selector.MatchLabels = map[string]string{v1beta1constants.LabelWorkerPool: d.workerName, v1beta1constants.LabelWorkerPoolDeprecated: d.workerName}
return nil
})
return &toApply, err
}