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risingwave_scale_view_controller.go
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/
risingwave_scale_view_controller.go
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/*
* Copyright 2023 RisingWave Labs
*
* 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 controller
import (
"context"
"fmt"
"time"
"github.com/risingwavelabs/ctrlkit"
"github.com/samber/lo"
"golang.org/x/time/rate"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/util/workqueue"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
risingwavev1alpha1 "github.com/risingwavelabs/risingwave-operator/apis/risingwave/v1alpha1"
"github.com/risingwavelabs/risingwave-operator/pkg/manager"
"github.com/risingwavelabs/risingwave-operator/pkg/metrics"
"github.com/risingwavelabs/risingwave-operator/pkg/utils"
)
// RisingWaveScaleView controller related constants.
const (
RisingWaveScaleViewSyncLockRetryLimit = 2
RisingWaveScaleViewSyncLockRetryInterval = 5 * time.Millisecond
)
// RisingWaveScaleViewController is the controller for RisingWaveScaleView.
type RisingWaveScaleViewController struct {
Client client.Client
}
// +kubebuilder:rbac:groups=risingwave.risingwavelabs.com,resources=risingwaves,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=risingwave.risingwavelabs.com,resources=risingwaves/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=risingwave.risingwavelabs.com,resources=risingwavescaleviews,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=risingwave.risingwavelabs.com,resources=risingwavescaleviews/status,verbs=get;update;patch
// +kubebuilder:rbac:groups="",resources=events,verbs=create;patch
// Reconcile implements the reconcile.Reconciler.
func (c *RisingWaveScaleViewController) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
logger := log.FromContext(ctx)
var scaleView risingwavev1alpha1.RisingWaveScaleView
err := c.Client.Get(ctx, request.NamespacedName, &scaleView)
if err != nil {
if apierrors.IsNotFound(err) {
logger.V(1).Info("Not found, abort")
return ctrlkit.NoRequeue()
}
logger.Error(err, "Failed to get risingwavescaleview")
return ctrlkit.RequeueIfErrorAndWrap("unable to get risingwavescaleview", err)
}
logger = logger.WithValues("generation", scaleView.Generation)
// Build manager and workflow.
mgr := manager.NewRisingWaveScaleViewControllerManager(
manager.NewRisingWaveScaleViewControllerManagerState(c.Client, scaleView.DeepCopy()),
manager.NewRisingWaveScaleViewControllerManagerImpl(c.Client, scaleView.DeepCopy()),
logger,
)
isScaleViewDeleted := utils.IsDeleted(&scaleView)
// - If the object is already marked as deleted, then the controller must handle the finalizer
// - If not, it tries to
// - Sync replicas in status (RisingWave -> RisingWaveScaleView)
// - Sync replicas in spec (RisingWaveScaleView -> RisingWave)
// 1. Grab or update the lock (which is recorded under the RisingWave object's status field).
// 2. Try sync the replicas from the object to corresponding groups of RisingWave object.
return ctrlkit.IgnoreExit(ctrlkit.OptimizeWorkflow(
ctrlkit.If(!isScaleViewDeleted,
// Use OrderedJoin to defer the execution of UpdateScaleViewStatus.
ctrlkit.OrderedJoin(
ctrlkit.Join(
ctrlkit.Sequential(
ctrlkit.RetryInterval(RisingWaveScaleViewSyncLockRetryLimit, RisingWaveScaleViewSyncLockRetryInterval, mgr.GrabOrUpdateScaleViewLock()),
mgr.SyncGroupReplicasToRisingWave(),
),
mgr.SyncGroupReplicasStatusFromRisingWave(),
),
mgr.UpdateScaleViewStatus(),
),
),
).Run(ctx))
}
// SetupWithManager sets up the controller with a given manager.
func (c *RisingWaveScaleViewController) SetupWithManager(mgr ctrl.Manager) error {
gvk, err := apiutil.GVKForObject(&risingwavev1alpha1.RisingWaveScaleView{}, c.Client.Scheme())
if err != nil {
return fmt.Errorf("unable to find gvk for RisingWaveScaleView: %w", err)
}
return ctrl.NewControllerManagedBy(mgr).
WithOptions(controller.Options{
MaxConcurrentReconciles: 64,
RateLimiter: workqueue.NewMaxOfRateLimiter(
// Exponential rate limiter, for immediate requeue (result.Requeue == true || err != nil).
workqueue.NewItemExponentialFailureRateLimiter(5*time.Millisecond, 10*time.Second),
// Bucket limiter of 10 qps, 100 bucket size.
&workqueue.BucketRateLimiter{Limiter: rate.NewLimiter(rate.Limit(10), 100)},
),
}).
For(&risingwavev1alpha1.RisingWaveScaleView{}).
Watches(
&risingwavev1alpha1.RisingWave{},
// Enqueue requests for the RisingWaveScaleViews recorded in the status of RisingWave object when
// there is change happened on the RisingWave object.
handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, object client.Object) []reconcile.Request {
obj := object.(*risingwavev1alpha1.RisingWave)
return lo.Map(obj.Status.ScaleViews, func(t risingwavev1alpha1.RisingWaveScaleViewLock, _ int) reconcile.Request {
return reconcile.Request{NamespacedName: types.NamespacedName{
Namespace: obj.Namespace,
Name: t.Name,
}}
})
}),
).
Complete(metrics.NewControllerMetricsRecorder(c, "RisingWaveScaleViewController", gvk))
}
// NewRisingWaveScaleViewController creates a new RisingWaveScaleViewController.
func NewRisingWaveScaleViewController(client client.Client) *RisingWaveScaleViewController {
return &RisingWaveScaleViewController{
Client: client,
}
}