add.go

// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0

package healthcheck

import (
	"context"
	"time"

	healthcheckconfig "github.com/gardener/gardener/extensions/pkg/apis/config"
	extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
	"github.com/gardener/gardener/extensions/pkg/controller/healthcheck"
	"github.com/gardener/gardener/extensions/pkg/controller/healthcheck/general"
	"github.com/gardener/gardener/extensions/pkg/controller/healthcheck/worker"
	extensionspredicate "github.com/gardener/gardener/extensions/pkg/predicate"
	"github.com/gardener/gardener/extensions/pkg/util"
	gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
	extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/util/sets"
	"k8s.io/utils/ptr"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/manager"
	"sigs.k8s.io/controller-runtime/pkg/predicate"

	"github.com/gardener/gardener-extension-provider-azure/pkg/apis/azure/helper"
	"github.com/gardener/gardener-extension-provider-azure/pkg/azure"
)

var (
	defaultSyncPeriod = time.Second * 30
	// DefaultAddOptions are the default DefaultAddArgs for AddToManager.
	DefaultAddOptions = healthcheck.DefaultAddArgs{
		HealthCheckConfig: healthcheckconfig.HealthCheckConfig{
			SyncPeriod: metav1.Duration{Duration: defaultSyncPeriod},
			ShootRESTOptions: &healthcheckconfig.RESTOptions{
				QPS:   ptr.To[float32](100),
				Burst: ptr.To(130),
			},
		},
	}
)

// RegisterHealthChecks registers health checks for each extension resource
// HealthChecks are grouped by extension (e.g worker), extension.type (e.g azure) and  Health Check Type (e.g SystemComponentsHealthy)
func RegisterHealthChecks(ctx context.Context, mgr manager.Manager, opts healthcheck.DefaultAddArgs) error {
	remedyControllerPreCheckFunc := func(_ context.Context, _ client.Client, _ client.Object, cluster *extensionscontroller.Cluster) bool {
		return cluster.Shoot.Annotations[azure.DisableRemedyControllerAnnotation] != "true"
	}

	if err := healthcheck.DefaultRegistration(
		ctx,
		azure.Type,
		extensionsv1alpha1.SchemeGroupVersion.WithKind(extensionsv1alpha1.ControlPlaneResource),
		func() client.ObjectList { return &extensionsv1alpha1.ControlPlaneList{} },
		func() extensionsv1alpha1.Object { return &extensionsv1alpha1.ControlPlane{} },
		mgr,
		opts,
		[]predicate.Predicate{extensionspredicate.HasPurpose(extensionsv1alpha1.Normal)},
		[]healthcheck.ConditionTypeToHealthCheck{
			{
				ConditionType: string(gardencorev1beta1.ShootControlPlaneHealthy),
				HealthCheck:   general.NewSeedDeploymentHealthChecker(azure.CloudControllerManagerName),
			},
			{
				ConditionType: string(gardencorev1beta1.ShootControlPlaneHealthy),
				HealthCheck:   general.NewSeedDeploymentHealthChecker(azure.CSIControllerDiskName),
			},
			{
				ConditionType: string(gardencorev1beta1.ShootControlPlaneHealthy),
				HealthCheck:   general.NewSeedDeploymentHealthChecker(azure.CSIControllerFileName),
			},
			{
				ConditionType: string(gardencorev1beta1.ShootControlPlaneHealthy),
				HealthCheck:   general.NewSeedDeploymentHealthChecker(azure.RemedyControllerName),
				PreCheckFunc:  remedyControllerPreCheckFunc,
			},
			{
				ConditionType: string(gardencorev1beta1.ShootControlPlaneHealthy),
				HealthCheck:   general.NewSeedDeploymentHealthChecker(azure.CSISnapshotControllerName),
			},
			{
				ConditionType: string(gardencorev1beta1.ShootControlPlaneHealthy),
				HealthCheck:   general.NewSeedDeploymentHealthChecker(azure.CSISnapshotValidationName),
			},
		},
		sets.Set[gardencorev1beta1.ConditionType]{},
	); err != nil {
		return err
	}

	return healthcheck.DefaultRegistration(
		ctx,
		azure.Type,
		extensionsv1alpha1.SchemeGroupVersion.WithKind(extensionsv1alpha1.WorkerResource),
		func() client.ObjectList { return &extensionsv1alpha1.WorkerList{} },
		func() extensionsv1alpha1.Object { return &extensionsv1alpha1.Worker{} },
		mgr,
		opts,
		nil,
		[]healthcheck.ConditionTypeToHealthCheck{{
			ConditionType: string(gardencorev1beta1.ShootEveryNodeReady),
			HealthCheck:   worker.NewNodesChecker(),
			ErrorCodeCheckFunc: func(err error) []gardencorev1beta1.ErrorCode {
				return util.DetermineErrorCodes(err, helper.KnownCodes)
			},
		}},
		sets.New(gardencorev1beta1.ShootControlPlaneHealthy),
	)
}

// AddToManager adds a controller with the default Options.
func AddToManager(ctx context.Context, mgr manager.Manager) error {
	return RegisterHealthChecks(ctx, mgr, DefaultAddOptions)
}