worker

Documentation

Index

• Constants
• func Add(mgr manager.Manager, args AddArgs) error
• func ApplyMachineResources(ctx context.Context, c client.Client) error
• func ApplyMachineResourcesForConfig(ctx context.Context, config *rest.Config) error
• func ClusterToWorkerMapper(predicates []predicate.Predicate) handler.Mapper
• func DefaultPredicates(ignoreOperationAnnotation bool) []predicate.Predicate
• func DiskSize(size string) (int, error)
• func DistributeOverZones(zoneIndex, size, zoneSize int32) int32
• func DistributePercentOverZones(zoneIndex int32, percent string, zoneSize, total int32) string
• func DistributePositiveIntOrPercent(zoneIndex int32, intOrPercent intstr.IntOrString, zoneSize, total int32) intstr.IntOrString
• func ErrorMachineImageNotFound(name, version string, opt ...string) error
• func MachineSetToWorkerMapper(predicates []predicate.Predicate) handler.Mapper
• func MachineStatusHasChanged() predicate.Predicate
• func MachineToWorkerMapper(predicates []predicate.Predicate) handler.Mapper
• func NewReconciler(mgr manager.Manager, actuator Actuator) reconcile.Reconciler
• func NewStateReconciler(mgr manager.Manager, actuator StateActuator) reconcile.Reconciler
• func WorkerPoolHash(pool extensionsv1alpha1.WorkerPool, cluster *extensionscontroller.Cluster, ...) (string, error)
• type Actuator
• type AddArgs
• type Config
  • func (c *Config) Apply(ignore *bool)
• type MachineDeployment
• type MachineDeploymentState
• type MachineDeployments
  • func (m MachineDeployments) HasClass(className string) bool
  • func (m MachineDeployments) HasDeployment(name string) bool
  • func (m MachineDeployments) HasSecret(secretName string) bool
• type Options
  • func (c *Options) AddFlags(fs *pflag.FlagSet)
  • func (c *Options) Complete() error
  • func (c *Options) Completed() *Config
• type State
• type StateActuator
  • func NewStateActuator(logger logr.Logger) StateActuator

Constants

const (
	// FinalizerName is the worker controller finalizer.
	FinalizerName = "extensions.gardener.cloud/worker"
	// ControllerName is the name of the controller.
	ControllerName = "worker_controller"
	// StateUpdatingControllerName is the name of the controller responsible for updating the worker's state.
	StateUpdatingControllerName = "worker_state_controller"
)

const (
	// StartToSyncState is used as part of the Event 'reason' when a Worker state starts to synchronize
	StartToSyncState = "SynchronizingState"
	// SuccessSynced is used as part of the Event 'reason' when a Worker state is synced
	SuccessSynced = "StateSynced"
	// ErrorStateSync is used as part of the Event 'reason' when a Worker state fail to sync
	ErrorStateSync = "ErrorSynchronizingState"
	// StateSyncControllerName is the name of the controller which synchronize the Worker state
	StateSyncControllerName = "worker-state-controller"
)

const (
	// DeployCRDsFlag is the name of the command line flag to specify whether the worker CRDs
	// should be deployed or not.
	DeployCRDsFlag = "deploy-crds"
)

Functions

func Add

func Add(mgr manager.Manager, args AddArgs) error

Add creates a new Worker Controller and adds it to the Manager. and Start it when the Manager is Started.

func ApplyMachineResources

func ApplyMachineResources(ctx context.Context, c client.Client) error

ApplyMachineResources ensures that all well-known machine CRDs are created or updated.

func ApplyMachineResourcesForConfig

func ApplyMachineResourcesForConfig(ctx context.Context, config *rest.Config) error

ApplyMachineResourcesForConfig ensures that all well-known machine CRDs are created or updated.

func ClusterToWorkerMapper

func ClusterToWorkerMapper(predicates []predicate.Predicate) handler.Mapper

ClusterToWorkerMapper returns a mapper that returns requests for Worker whose referenced clusters have been modified.

func DefaultPredicates

func DefaultPredicates(ignoreOperationAnnotation bool) []predicate.Predicate

DefaultPredicates returns the default predicates for a Worker reconciler.

func DiskSize

func DiskSize(size string) (int, error)

DiskSize extracts the numerical component of DiskSize strings, i.e. strings like "10Gi" and returns it as string, i.e. "10" will be returned.

func DistributeOverZones

func DistributeOverZones(zoneIndex, size, zoneSize int32) int32

DistributeOverZones is a function which is used to determine how many nodes should be used for each availability zone. It takes the number of availability zones (<zoneSize>), the index of the current zone (<zoneIndex>) and the number of nodes which must be distributed over the zones (<size>) and returns the number of nodes which should be placed in the zone of index <zoneIndex>. The distribution happens equally. In case of an uneven number <size>, the last zone will have one more node than the others.

func DistributePercentOverZones

func DistributePercentOverZones(zoneIndex int32, percent string, zoneSize, total int32) string

DistributePercentOverZones distributes a given percentage value over zones in relation to the given total value. In case the total value is evenly divisible over the zones, this always just returns the initial percentage. Otherwise, the total value is used to determine the weight of a specific zone in relation to the other zones and adapt the given percentage accordingly.

func DistributePositiveIntOrPercent

func DistributePositiveIntOrPercent(zoneIndex int32, intOrPercent intstr.IntOrString, zoneSize, total int32) intstr.IntOrString

DistributePositiveIntOrPercent distributes a given int or percentage value over zones in relation to the given total value. In case the total value is evenly divisible over the zones, this always just returns the initial percentage. Otherwise, the total value is used to determine the weight of a specific zone in relation to the other zones and adapt the given percentage accordingly.

func ErrorMachineImageNotFound

func ErrorMachineImageNotFound(name, version string, opt ...string) error

ErrorMachineImageNotFound returns an appropriate error message for an unknown name/version image pair.

func MachineSetToWorkerMapper

func MachineSetToWorkerMapper(predicates []predicate.Predicate) handler.Mapper

MachineSetToWorkerMapper returns a mapper that returns requests for Worker whose referenced MachineSets have been modified.

func MachineStatusHasChanged

func MachineStatusHasChanged() predicate.Predicate

MachineStatusHasChanged is a predicate deciding wether the status of a MCM's Machine has been changed.

func MachineToWorkerMapper

func MachineToWorkerMapper(predicates []predicate.Predicate) handler.Mapper

MachineToWorkerMapper returns a mapper that returns requests for Worker whose referenced Machines have been modified.

func NewReconciler

func NewReconciler(mgr manager.Manager, actuator Actuator) reconcile.Reconciler

NewReconciler creates a new reconcile.Reconciler that reconciles Worker resources of Gardener's `extensions.gardener.cloud` API group.

func NewStateReconciler

func NewStateReconciler(mgr manager.Manager, actuator StateActuator) reconcile.Reconciler

NewStateReconciler creates a new reconcile.Reconciler that reconciles Worker's State resources of Gardener's `extensions.gardener.cloud` API group.

func WorkerPoolHash

func WorkerPoolHash(pool extensionsv1alpha1.WorkerPool, cluster *extensionscontroller.Cluster, additionalData ...string) (string, error)

WorkerPoolHash returns a hash value for a given worker pool and a given cluster resource.

Types

type Actuator

type Actuator interface {
	// Reconcile reconciles the Worker.
	Reconcile(context.Context, *extensionsv1alpha1.Worker, *extensionscontroller.Cluster) error
	// Delete deletes the Worker.
	Delete(context.Context, *extensionsv1alpha1.Worker, *extensionscontroller.Cluster) error
	// Restore reads from the worker.status.state field and deploys the machines and machineSet
	Restore(context.Context, *extensionsv1alpha1.Worker, *extensionscontroller.Cluster) error
	// Migrate deletes the MCM, machineDeployments, machineClasses, machineClassSecrets,
	// machineSets and the machines. The underlying VMs representing the Shoot nodes are not deleted
	Migrate(context.Context, *extensionsv1alpha1.Worker, *extensionscontroller.Cluster) error
}

Actuator acts upon Worker resources.

type AddArgs

type AddArgs struct {
	// Actuator is an worker actuator.
	Actuator Actuator
	// ControllerOptions are the controller options used for creating a controller.
	// The options.Reconciler is always overridden with a reconciler created from the
	// given actuator.
	ControllerOptions controller.Options
	// Predicates are the predicates to use.
	// If unset, GenerationChangedPredicate will be used.
	Predicates []predicate.Predicate
	// Type is the type of the resource considered for reconciliation.
	Type string
	// IgnoreOperationAnnotation specifies whether to ignore the operation annotation or not.
	// If the annotation is not ignored, the extension controller will only reconcile
	// with a present operation annotation typically set during a reconcile (e.g in the maintenance time) by the Gardenlet
	IgnoreOperationAnnotation bool
}

AddArgs are arguments for adding an worker controller to a manager.

type Config

type Config struct {
	// DeployCRDs defines whether to ignore the operation annotation or not.
	DeployCRDs bool
}

Config is a completed controller configuration.

func (*Config) Apply

func (c *Config) Apply(ignore *bool)

Apply sets the values of this Config in the given controller.Options.

type MachineDeployment

type MachineDeployment struct {
	Name           string
	ClassName      string
	SecretName     string
	Minimum        int32
	Maximum        int32
	MaxSurge       intstr.IntOrString
	MaxUnavailable intstr.IntOrString
	Labels         map[string]string
	Annotations    map[string]string
	Taints         []corev1.Taint
	State          *MachineDeploymentState
}

MachineDeployment holds information about the name, class, replicas of a MachineDeployment managed by the machine-controller-manager.

type MachineDeploymentState

type MachineDeploymentState struct {
	Replicas    int32                        `json:"replicas,omitempty"`
	MachineSets []machinev1alpha1.MachineSet `json:"machineSets,omitempty"`
	Machines    []machinev1alpha1.Machine    `json:"machines,omitempty"`
}

MachineDeploymentState stores the last versions of the machine sets and machine which the machine deployment corresponds

type MachineDeployments

type MachineDeployments []MachineDeployment

MachineDeployments is a list of machine deployments.

func (MachineDeployments) HasClass

func (m MachineDeployments) HasClass(className string) bool

HasClass checks whether the <className> is part of the <machineDeployments> list, i.e. whether there is an entry whose 'ClassName' attribute matches <name>. It returns true or false.

func (MachineDeployments) HasDeployment

func (m MachineDeployments) HasDeployment(name string) bool

HasDeployment checks whether the <name> is part of the <machineDeployments> list, i.e. whether there is an entry whose 'Name' attribute matches <name>. It returns true or false.

func (MachineDeployments) HasSecret

func (m MachineDeployments) HasSecret(secretName string) bool

HasSecret checks whether the <secretName> is part of the <machineDeployments> list, i.e. whether there is an entry whose 'SecretName' attribute matches <name>. It returns true or false.

type Options

type Options struct {
	// DeployCRDs defines whether to ignore the operation annotation or not.
	DeployCRDs bool
	// contains filtered or unexported fields
}

Options are command line options that can be set for controller.Options.

func (*Options) AddFlags

func (c *Options) AddFlags(fs *pflag.FlagSet)

AddFlags implements Flagger.AddFlags.

func (*Options) Complete

func (c *Options) Complete() error

Complete implements Completer.Complete.

func (*Options) Completed

func (c *Options) Completed() *Config

Completed returns the completed Config. Only call this if `Complete` was successful.

type State

type State struct {
	MachineDeployments map[string]*MachineDeploymentState `json:"machineDeployments,omitempty"`
}

State represent the last known state of a Worker

type StateActuator

type StateActuator interface {
	// Reconcile reconciles the Worker State.
	Reconcile(context.Context, *extensionsv1alpha1.Worker) error
}

StateActuator acts upon Worker's State resources.

func NewStateActuator

func NewStateActuator(logger logr.Logger) StateActuator

NewStateActuator creates a new Actuator that reconciles Worker's State subresource It provides a default implementation that allows easier integration of providers.