care

package
v1.92.0 Latest Latest
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 Go to latest Published: Apr 5, 2024 License: Apache-2.0, BSD-2-Clause, MIT, + 1 more Imports: 67 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// WebhookMaximumTimeoutSecondsNotProblematic is the maximum timeout in seconds a webhooks on critical resources can
	// have in order to not be considered as a problematic webhook by the constraints checks. Any webhook on critical
	// resources with a larger timeout is considered to be problematic.
	WebhookMaximumTimeoutSecondsNotProblematic = 15
	// WebhookMaximumTimeoutSecondsNotProblematicForLeases is the maximum timeout in seconds a webhooks on lease resources in
	// kube-system namespace can have in order to not be considered as a problematic webhook by the constraints checks.
	// Any webhook on lease resources in kube-system namespace with a larger timeout can break leader election of essential
	// control plane controllers.
	WebhookMaximumTimeoutSecondsNotProblematicForLeases = 3
)
View Source 
const ControllerName = "shoot-care"

ControllerName is the name of this controller.

View Source 
const GardenerDeletionGracePeriod = 5 * time.Minute

GardenerDeletionGracePeriod is the default grace period for Gardener's force deletion methods.

Variables

View Source 
var (
	// NewOperation is used to create a new `operation.Operation` instance.
	NewOperation = defaultNewOperationFunc
	// NewHealthCheck is used to create a new Health check instance.
	NewHealthCheck = defaultNewHealthCheck
	// NewConstraintCheck is used to create a new Constraint check instance.
	NewConstraintCheck = defaultNewConstraintCheck
	// NewGarbageCollector is used to create a new garbage collection instance.
	NewGarbageCollector = defaultNewGarbageCollector
	// NewWebhookRemediator is used to create a new webhook remediation instance.
	NewWebhookRemediator = defaultNewWebhookRemediator
)
View Source 
var RandomDurationWithMetaDuration = utils.RandomDurationWithMetaDuration

RandomDurationWithMetaDuration is an alias for utils.RandomDurationWithMetaDuration.

Functions

func CheckForExpiredNodeLeases added in v1.91.0 

func CheckForExpiredNodeLeases(nodeList *corev1.NodeList, leaseList *coordinationv1.LeaseList, clock clock.Clock) error

CheckForExpiredNodeLeases checks if the number of expired node Leases surpasses 20% of all existing Leases. If yes, an error will be returned. The motivation is that dependency-watchdog is starting to scale down controllers when 60% of the Leases are expired.

func CheckIfDependencyWatchdogProberScaledDownControllers added in v1.91.0 

func CheckIfDependencyWatchdogProberScaledDownControllers(ctx context.Context, seedClient client.Client, shootNamespace string) ([]string, error)

CheckIfDependencyWatchdogProberScaledDownControllers checks if controllers have been scaled down by dependency-watchdog-prober.

func CheckNodeAgentLeases added in v1.88.0 

func CheckNodeAgentLeases(nodeList *corev1.NodeList, leaseList *coordinationv1.LeaseList, clock clock.Clock) error

CheckNodeAgentLeases checks if all nodes in the shoot cluster have a corresponding Lease object maintained by gardener-node-agent

func CheckNodesScalingDown added in v1.79.0 

func CheckNodesScalingDown(machineList *machinev1alpha1.MachineList, nodeList *corev1.NodeList, registeredNodes, desiredMachines int) error

CheckNodesScalingDown returns an error if nodes are being scaled down.

func CheckNodesScalingUp added in v1.79.0 

func CheckNodesScalingUp(machineList *machinev1alpha1.MachineList, readyNodes, desiredMachines int) error

CheckNodesScalingUp returns an error if nodes are being scaled up.

func ComputeRequiredControlPlaneDeployments added in v1.79.0 

func ComputeRequiredControlPlaneDeployments(shoot *gardencorev1beta1.Shoot) (sets.Set[string], error)

ComputeRequiredControlPlaneDeployments returns names of required deployments based on the given shoot.

func ComputeRequiredMonitoringSeedDeployments added in v1.79.0 

func ComputeRequiredMonitoringSeedDeployments(shoot *gardencorev1beta1.Shoot) sets.Set[string]

ComputeRequiredMonitoringSeedDeployments returns names of monitoring deployments based on the given shoot.

func ComputeRequiredMonitoringStatefulSets added in v1.79.0 

func ComputeRequiredMonitoringStatefulSets() sets.Set[string]

ComputeRequiredMonitoringStatefulSets returns names of monitoring statefulsets based on the given shoot.

func IsProblematicWebhook added in v1.79.0 

func IsProblematicWebhook(
	failurePolicy *admissionregistrationv1.FailurePolicyType,
	objSelector *metav1.LabelSelector,
	nsSelector *metav1.LabelSelector,
	rules []admissionregistrationv1.RuleWithOperations,
	timeoutSeconds *int32,
) bool

IsProblematicWebhook checks if a single webhook of the Shoot Cluster is problematic. Problematic webhooks are webhooks with rules for CREATE/UPDATE/* pods or nodes and failurePolicy=Fail/nil. If the Shoot contains such a webhook, we can never wake up this shoot cluster again as new nodes cannot get created/ready, or our system component pods cannot get created/ready (because the webhook's backing pod is not yet running).

func PardonConditions added in v1.79.0 

func PardonConditions(clock clock.Clock, conditions []gardencorev1beta1.Condition, lastOp *gardencorev1beta1.LastOperation, lastErrors []gardencorev1beta1.LastError) []gardencorev1beta1.Condition

PardonConditions pardons the given condition if the Shoot is either in create (except successful create) or delete state.

Types

type Constraint added in v1.79.0 

type Constraint struct {
	// contains filtered or unexported fields
}

Constraint contains required information for shoot constraint checks.

func NewConstraint added in v1.79.0 

func NewConstraint(
	log logr.Logger,
	shoot *shoot.Shoot,
	seedClient client.Client,
	shootClientInit ShootClientInit,
	clock clock.Clock,
) *Constraint

NewConstraint returns a new constraint instance.

func (*Constraint) Check added in v1.79.0 

func (c *Constraint) Check(
	ctx context.Context,
	constraints ShootConstraints,
) []gardencorev1beta1.Condition

Check checks all given constraints.

func (*Constraint) CheckForProblematicWebhooks added in v1.79.0 

func (c *Constraint) CheckForProblematicWebhooks(ctx context.Context) (gardencorev1beta1.ConditionStatus, string, string, []gardencorev1beta1.ErrorCode, error)

CheckForProblematicWebhooks checks the Shoot for problematic webhooks which could prevent shoot worker nodes from joining the cluster.

func (*Constraint) CheckIfCACertificateValiditiesAcceptable added in v1.79.0 

func (c *Constraint) CheckIfCACertificateValiditiesAcceptable(ctx context.Context) (gardencorev1beta1.ConditionStatus, string, string, []gardencorev1beta1.ErrorCode, error)

CheckIfCACertificateValiditiesAcceptable checks whether there are CA certificates which are expiring in less than a year.

type ConstraintCheck 

type ConstraintCheck interface {
	Check(context.Context, ShootConstraints) []gardencorev1beta1.Condition
}

ConstraintCheck is an interface used to perform constraint checks.

type GarbageCollection added in v1.79.0 

type GarbageCollection struct {
	// contains filtered or unexported fields
}

GarbageCollection contains required information for shoot and seed garbage collection.

func NewGarbageCollection added in v1.79.0 

func NewGarbageCollection(op *operation.Operation, shootClientInit ShootClientInit) *GarbageCollection

NewGarbageCollection creates a new garbage collection instance.

func (*GarbageCollection) Collect added in v1.79.0 

func (g *GarbageCollection) Collect(ctx context.Context)

Collect cleans the Seed and the Shoot cluster from no longer required objects. It receives a botanist object <botanist> which stores the Shoot object.

type GarbageCollector 

type GarbageCollector interface {
	Collect(ctx context.Context)
}

GarbageCollector is an interface used to perform garbage collection.

type Health added in v1.79.0 

type Health struct {
	// contains filtered or unexported fields
}

Health contains information needed to execute shoot health checks.

func NewHealth added in v1.79.0 

func NewHealth(
	log logr.Logger,
	shoot *shoot.Shoot,
	seed *seed.Seed,
	seedClientSet kubernetes.Interface,
	gardenClient client.Client,
	shootClientInit ShootClientInit,
	clock clock.Clock,
	gardenletConfig *gardenletconfig.GardenletConfiguration,
	conditionThresholds map[gardencorev1beta1.ConditionType]time.Duration,
) *Health

NewHealth creates a new Health instance with the given parameters.

func (*Health) Check added in v1.79.0 

func (h *Health) Check(
	ctx context.Context,
	healthCheckOutdatedThreshold *metav1.Duration,
	conditions ShootConditions,
) []gardencorev1beta1.Condition

Check conducts the health checks on all the given conditions.

func (*Health) CheckClusterNodes added in v1.79.0 

func (h *Health) CheckClusterNodes(
	ctx context.Context,
	shootClient kubernetes.Interface,
	condition gardencorev1beta1.Condition,
) (
	*gardencorev1beta1.Condition,
	error,
)

CheckClusterNodes checks whether cluster nodes are healthy and within the desired range. Additional checks are executed in the provider extension.

type HealthCheck 

type HealthCheck interface {
	Check(ctx context.Context, threshold *metav1.Duration, conditions ShootConditions) []gardencorev1beta1.Condition
}

HealthCheck is an interface used to perform health checks.

type NewConstraintCheckFunc 

type NewConstraintCheckFunc func(
	log logr.Logger,
	shoot *shoot.Shoot,
	seedClient client.Client,
	shootClientInit ShootClientInit,
	clock clock.Clock,
) ConstraintCheck

NewConstraintCheckFunc is a function used to create a new instance for performing constraint checks.

type NewGarbageCollectorFunc 

type NewGarbageCollectorFunc func(op *operation.Operation, init ShootClientInit) GarbageCollector

NewGarbageCollectorFunc is a function used to create a new instance to perform garbage collection.

type NewHealthCheckFunc 

type NewHealthCheckFunc func(
	logger logr.Logger,
	shoot *shoot.Shoot,
	seed *seed.Seed,
	seedClient kubernetes.Interface,
	gardenClient client.Client,
	shootClientInit ShootClientInit,
	clock clock.Clock,
	gardenletConfig *gardenletconfig.GardenletConfiguration,
	conditionThresholds map[gardencorev1beta1.ConditionType]time.Duration,
) HealthCheck

NewHealthCheckFunc is a function used to create a new instance for performing health checks.

type NewOperationFunc 

type NewOperationFunc func(
	ctx context.Context,
	log logr.Logger,
	gardenClient client.Client,
	seedClientSet kubernetes.Interface,
	shootClientMap clientmap.ClientMap,
	config *gardenletconfig.GardenletConfiguration,
	gardenerInfo *gardencorev1beta1.Gardener,
	gardenClusterIdentity string,
	secrets map[string]*corev1.Secret,
	shoot *gardencorev1beta1.Shoot,
) (
	*operation.Operation,
	error,
)

NewOperationFunc is a function used to create a new `operation.Operation` instance.

type NewWebhookRemediatorFunc 

type NewWebhookRemediatorFunc func(op *operation.Operation, init ShootClientInit) WebhookRemediator

NewWebhookRemediatorFunc is a function used to create a new instance to perform webhook remediation.

type Reconciler 

type Reconciler struct {
	GardenClient          client.Client
	SeedClientSet         kubernetes.Interface
	ShootClientMap        clientmap.ClientMap
	Config                config.GardenletConfiguration
	Clock                 clock.Clock
	Identity              *gardencorev1beta1.Gardener
	GardenClusterIdentity string
	SeedName              string
	// contains filtered or unexported fields
}

Reconciler reconciles Shoot resources and executes care operations, e.g. health checks or garbage collection.

func (*Reconciler) AddToManager 

func (r *Reconciler) AddToManager(mgr manager.Manager, gardenCluster cluster.Cluster) error

AddToManager adds Reconciler to the given manager.

func (*Reconciler) EventHandler 

func (r *Reconciler) EventHandler() handler.EventHandler

EventHandler returns a handler for Shoot events.

func (*Reconciler) Reconcile 

func (r *Reconciler) Reconcile(ctx context.Context, req reconcile.Request) (reconcile.Result, error)

Reconcile executes care operations, e.g. health checks or garbage collection.

func (*Reconciler) ShootPredicate 

func (r *Reconciler) ShootPredicate() predicate.Predicate

ShootPredicate is a predicate which returns 'true' for create events, and for update events in case the shoot was successfully reconciled.

type ShootClientInit added in v1.79.0 

type ShootClientInit func() (kubernetes.Interface, bool, error)

ShootClientInit is a function that initializes a kubernetes client for a Shoot.

type ShootConditions added in v1.79.0 

type ShootConditions struct {
	// contains filtered or unexported fields
}

ShootConditions contains all shoot related conditions of the shoot status subresource.

func NewShootConditions added in v1.79.0 

func NewShootConditions(clock clock.Clock, shoot *gardencorev1beta1.Shoot) ShootConditions

NewShootConditions returns a new instance of ShootConditions. All conditions are retrieved from the given 'shoot' or newly initialized.

func (ShootConditions) ConditionTypes added in v1.79.0 

func (s ShootConditions) ConditionTypes() []gardencorev1beta1.ConditionType

ConditionTypes returns all shoot condition types.

func (ShootConditions) ConvertToSlice added in v1.79.0 

func (s ShootConditions) ConvertToSlice() []gardencorev1beta1.Condition

ConvertToSlice returns the shoot conditions as a slice.

type ShootConstraints added in v1.79.0 

type ShootConstraints struct {
	// contains filtered or unexported fields
}

ShootConstraints contains all constraints of the shoot status subresource.

func NewShootConstraints added in v1.79.0 

func NewShootConstraints(clock clock.Clock, shoot *gardencorev1beta1.Shoot) ShootConstraints

NewShootConstraints returns a new instance of ShootConstraints. All constraints are retrieved from the given 'shoot' or newly initialized.

func (ShootConstraints) ConstraintTypes added in v1.79.0 

func (g ShootConstraints) ConstraintTypes() []gardencorev1beta1.ConditionType

ConstraintTypes returns all shoot constraint types.

func (ShootConstraints) ConvertToSlice added in v1.79.0 

func (g ShootConstraints) ConvertToSlice() []gardencorev1beta1.Condition

ConvertToSlice returns the shoot constraints as a slice.

type WebhookRemediation added in v1.79.0 

type WebhookRemediation struct {
	// contains filtered or unexported fields
}

WebhookRemediation contains required information for shoot webhook remediation.

func NewWebhookRemediation added in v1.79.0 

func NewWebhookRemediation(log logr.Logger, shoot *gardencorev1beta1.Shoot, shootClientInit ShootClientInit) *WebhookRemediation

NewWebhookRemediation creates a new instance for webhook remediation.

func (*WebhookRemediation) Remediate added in v1.79.0 

func (r *WebhookRemediation) Remediate(ctx context.Context) error

Remediate mutates shoot webhooks not following the best practices documented by Kubernetes.

type WebhookRemediator 

type WebhookRemediator interface {
	Remediate(ctx context.Context) error
}

WebhookRemediator is an interface used to perform webhook remediation.

Source Files

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