internal

package
v0.3.25 Latest Latest
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 Go to latest Published: Feb 1, 2022 License: Apache-2.0 Imports: 51 Imported by: 0

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Index

Constants

View Source 
const (
	// NodeBootstrapTokenAuthGroup specifies which group a Node Bootstrap Token should be authenticated in
	NodeBootstrapTokenAuthGroup = "system:bootstrappers:kubeadm:default-node-token"

	// GetNodesClusterRoleName defines the name of the ClusterRole and ClusterRoleBinding to get nodes
	GetNodesClusterRoleName = "kubeadm:get-nodes"

	// NodesGroup defines the well-known group for all nodes.
	NodesGroup = "system:nodes"

	// KubeletConfigMapRolePrefix defines base kubelet configuration ConfigMap role prefix.
	KubeletConfigMapRolePrefix = "kubeadm:"

	// KubeletConfigMapName defines base kubelet configuration ConfigMap name.
	KubeletConfigMapName = "kubelet-config-%d.%d"
)

Variables

View Source 
var (
	ErrControlPlaneMinNodes = errors.New("cluster has fewer than 2 control plane nodes; removing an etcd member is not supported")
)
View Source 
var Log = klogr.New()

Log is the global logger for the internal package.

Functions

func ControlPlaneLabelsForCluster 

func ControlPlaneLabelsForCluster(clusterName string) map[string]string

ControlPlaneLabelsForCluster returns a set of labels to add to a control plane machine for this specific cluster.

func PickFewest 

func PickFewest(failureDomains clusterv1.FailureDomains, machines FilterableMachineCollection) *string

PickFewest returns the failure domain with the fewest number of machines.

func PickMost 

func PickMost(c *ControlPlane, machines FilterableMachineCollection) *string

PickMost returns a failure domain that is in machines and has most control-plane machines on.

Types

type ClusterStatus 

type ClusterStatus struct {
	// Nodes are a total count of nodes
	Nodes int32
	// ReadyNodes are the count of nodes that are reporting ready
	ReadyNodes int32
	// HasKubeadmConfig will be true if the kubeadm config map has been uploaded, false otherwise.
	HasKubeadmConfig bool
}

ClusterStatus holds stats information about the cluster.

type ControlPlane added in v0.3.2 

type ControlPlane struct {
	KCP      *controlplanev1.KubeadmControlPlane
	Cluster  *clusterv1.Cluster
	Machines FilterableMachineCollection
	// contains filtered or unexported fields
}

ControlPlane holds business logic around control planes. It should never need to connect to a service, that responsibility lies outside of this struct. Going forward we should be trying to add more logic to here and reduce the amount of logic in the reconciler.

func NewControlPlane added in v0.3.2 

func NewControlPlane(ctx context.Context, client client.Client, cluster *clusterv1.Cluster, kcp *controlplanev1.KubeadmControlPlane, ownedMachines FilterableMachineCollection) (*ControlPlane, error)

NewControlPlane returns an instantiated ControlPlane.

func (*ControlPlane) AsOwnerReference added in v0.3.2 

func (c *ControlPlane) AsOwnerReference() *metav1.OwnerReference

AsOwnerReference returns an owner reference to the KubeadmControlPlane.

func (*ControlPlane) EtcdImageData added in v0.3.2 

func (c *ControlPlane) EtcdImageData() (string, string)

EtcdImageData returns the etcd image data embedded in the ClusterConfiguration or empty strings if none are defined.

func (*ControlPlane) FailureDomainWithMostMachines added in v0.3.3 

func (c *ControlPlane) FailureDomainWithMostMachines(machines FilterableMachineCollection) *string

FailureDomainWithMostMachines returns a fd which exists both in machines and control-plane machines and has the most control-plane machines on it.

func (*ControlPlane) FailureDomains added in v0.3.3 

func (c *ControlPlane) FailureDomains() clusterv1.FailureDomains

FailureDomains returns a slice of failure domain objects synced from the infrastructure provider into Cluster.Status.

func (*ControlPlane) GenerateKubeadmConfig added in v0.3.2 

func (c *ControlPlane) GenerateKubeadmConfig(spec *bootstrapv1.KubeadmConfigSpec) *bootstrapv1.KubeadmConfig

GenerateKubeadmConfig generates a new kubeadm config for creating new control plane nodes.

func (*ControlPlane) HasDeletingMachine added in v0.3.2 

func (c *ControlPlane) HasDeletingMachine() bool

HasDeletingMachine returns true if any machine in the control plane is in the process of being deleted.

func (*ControlPlane) HasUnhealthyMachine added in v0.3.11 

func (c *ControlPlane) HasUnhealthyMachine() bool

HasUnhealthyMachine returns true if any machine in the control plane is marked as unhealthy by MHC.

func (*ControlPlane) HealthyMachines added in v0.3.11 

func (c *ControlPlane) HealthyMachines() FilterableMachineCollection

HealthyMachines returns the list of control plane machines not marked as unhealthy by MHC.

func (*ControlPlane) InfrastructureTemplate added in v0.3.2 

func (c *ControlPlane) InfrastructureTemplate() *corev1.ObjectReference

InfrastructureTemplate returns the KubeadmControlPlane's infrastructure template.

func (*ControlPlane) InitialControlPlaneConfig added in v0.3.2 

func (c *ControlPlane) InitialControlPlaneConfig() *bootstrapv1.KubeadmConfigSpec

InitialControlPlaneConfig returns a new KubeadmConfigSpec that is to be used for an initializing control plane.

func (*ControlPlane) IsEtcdManaged added in v0.3.9 

func (c *ControlPlane) IsEtcdManaged() bool

IsEtcdManaged returns true if the control plane relies on a managed etcd.

func (*ControlPlane) JoinControlPlaneConfig added in v0.3.2 

func (c *ControlPlane) JoinControlPlaneConfig() *bootstrapv1.KubeadmConfigSpec

JoinControlPlaneConfig returns a new KubeadmConfigSpec that is to be used for joining control planes.

func (*ControlPlane) Logger added in v0.3.2 

func (c *ControlPlane) Logger() logr.Logger

Logger returns a logger with useful context.

func (*ControlPlane) MachineInFailureDomainWithMostMachines added in v0.3.4 

func (c *ControlPlane) MachineInFailureDomainWithMostMachines(machines FilterableMachineCollection) (*clusterv1.Machine, error)

MachineInFailureDomainWithMostMachines returns the first matching failure domain with machines that has the most control-plane machines on it.

func (*ControlPlane) MachineWithDeleteAnnotation added in v0.3.13 

func (c *ControlPlane) MachineWithDeleteAnnotation(machines FilterableMachineCollection) FilterableMachineCollection

MachineWithDeleteAnnotation returns a machine that has been annotated with DeleteMachineAnnotation key.

func (*ControlPlane) MachinesNeedingRollout added in v0.3.8 

func (c *ControlPlane) MachinesNeedingRollout() FilterableMachineCollection

MachinesNeedingRollout return a list of machines that need to be rolled out.

func (*ControlPlane) NeedsReplacementNode added in v0.3.2 

func (c *ControlPlane) NeedsReplacementNode() bool

NeedsReplacementNode determines if the control plane needs to create a replacement node during upgrade.

func (*ControlPlane) NewMachine added in v0.3.2 

func (c *ControlPlane) NewMachine(infraRef, bootstrapRef *corev1.ObjectReference, failureDomain *string) *clusterv1.Machine

NewMachine returns a machine configured to be a part of the control plane.

func (*ControlPlane) NextFailureDomainForScaleUp added in v0.3.8 

func (c *ControlPlane) NextFailureDomainForScaleUp() *string

NextFailureDomainForScaleUp returns the failure domain with the fewest number of up-to-date machines.

func (*ControlPlane) PatchMachines added in v0.3.11 

func (c *ControlPlane) PatchMachines(ctx context.Context) error

func (*ControlPlane) UnhealthyMachines added in v0.3.11 

func (c *ControlPlane) UnhealthyMachines() FilterableMachineCollection

UnhealthyMachines returns the list of control plane machines marked as unhealthy by MHC.

func (*ControlPlane) UpToDateMachines added in v0.3.8 

func (c *ControlPlane) UpToDateMachines() FilterableMachineCollection

UpToDateMachines returns the machines that are up to date with the control plane's configuration and therefore do not require rollout.

func (*ControlPlane) Version added in v0.3.2 

func (c *ControlPlane) Version() *string

Version returns the KubeadmControlPlane's version.

type CoreDNSMigrator 

type CoreDNSMigrator struct{}

func (*CoreDNSMigrator) Migrate 

func (c *CoreDNSMigrator) Migrate(fromCoreDNSVersion, toCoreDNSVersion, corefile string, deprecations bool) (string, error)

type EtcdMemberStatus added in v0.3.11 

type EtcdMemberStatus struct {
	Name       string
	Responsive bool
}

type FilterableMachineCollection 

type FilterableMachineCollection map[string]*clusterv1.Machine

FilterableMachineCollection is a set of Machines

func NewFilterableMachineCollection 

func NewFilterableMachineCollection(machines ...*clusterv1.Machine) FilterableMachineCollection

NewFilterableMachineCollection creates a FilterableMachineCollection from a list of values.

func NewFilterableMachineCollectionFromMachineList 

func NewFilterableMachineCollectionFromMachineList(machineList *clusterv1.MachineList) FilterableMachineCollection

NewFilterableMachineCollectionFromMachineList creates a FilterableMachineCollection from the given MachineList

func (FilterableMachineCollection) AnyFilter 

func (s FilterableMachineCollection) AnyFilter(filters ...machinefilters.Func) FilterableMachineCollection

AnyFilter returns a FilterableMachineCollection containing only the Machines that match any of the given MachineFilters

func (FilterableMachineCollection) ConditionGetters added in v0.3.7 

func (s FilterableMachineCollection) ConditionGetters() []conditions.Getter

ConditionGetters returns the slice with machines converted into conditions.Getter.

func (FilterableMachineCollection) DeepCopy 

func (s FilterableMachineCollection) DeepCopy() FilterableMachineCollection

DeepCopy returns a deep copy

func (FilterableMachineCollection) Difference added in v0.3.8 

func (s FilterableMachineCollection) Difference(machines FilterableMachineCollection) FilterableMachineCollection

Difference returns a copy without machines that are in the given collection

func (FilterableMachineCollection) Filter 

func (s FilterableMachineCollection) Filter(filters ...machinefilters.Func) FilterableMachineCollection

Filter returns a FilterableMachineCollection containing only the Machines that match all of the given MachineFilters

func (FilterableMachineCollection) Insert 

func (s FilterableMachineCollection) Insert(machines ...*clusterv1.Machine)

Insert adds items to the set.

func (FilterableMachineCollection) Len 

func (s FilterableMachineCollection) Len() int

Len returns the size of the set.

func (FilterableMachineCollection) Names added in v0.3.8 

func (s FilterableMachineCollection) Names() []string

Names returns a slice of the names of each machine in the collection. Useful for logging and test assertions.

func (FilterableMachineCollection) Newest added in v0.3.2 

func (s FilterableMachineCollection) Newest() *clusterv1.Machine

Newest returns the Machine with the most recent CreationTimestamp

func (FilterableMachineCollection) Oldest 

func (s FilterableMachineCollection) Oldest() *clusterv1.Machine

Oldest returns the Machine with the oldest CreationTimestamp

func (FilterableMachineCollection) SortedByCreationTimestamp added in v0.3.2 

func (s FilterableMachineCollection) SortedByCreationTimestamp() []*clusterv1.Machine

SortedByCreationTimestamp returns the machines sorted by creation timestamp

func (FilterableMachineCollection) UnsortedList added in v0.3.11 

func (s FilterableMachineCollection) UnsortedList() []*clusterv1.Machine

UnsortedList returns the slice with contents in random order.

type Management 

type Management struct {
	Client ctrlclient.Reader
}

Management holds operations on the management cluster.

func (*Management) Get added in v0.3.7 

func (m *Management) Get(ctx context.Context, key ctrlclient.ObjectKey, obj runtime.Object) error

Get implements ctrlclient.Reader

func (*Management) GetMachinesForCluster 

func (m *Management) GetMachinesForCluster(ctx context.Context, cluster client.ObjectKey, filters ...machinefilters.Func) (FilterableMachineCollection, error)

GetMachinesForCluster returns a list of machines that can be filtered or not. If no filter is supplied then all machines associated with the target cluster are returned.

func (*Management) GetWorkloadCluster 

func (m *Management) GetWorkloadCluster(ctx context.Context, clusterKey client.ObjectKey) (WorkloadCluster, error)

GetWorkloadCluster builds a cluster object. The cluster comes with an etcd client generator to connect to any etcd pod living on a managed machine.

func (*Management) List added in v0.3.7 

func (m *Management) List(ctx context.Context, list runtime.Object, opts ...ctrlclient.ListOption) error

List implements ctrlclient.Reader

type ManagementCluster 

type ManagementCluster interface {
	ctrlclient.Reader

	GetMachinesForCluster(ctx context.Context, cluster client.ObjectKey, filters ...machinefilters.Func) (FilterableMachineCollection, error)
	GetWorkloadCluster(ctx context.Context, clusterKey client.ObjectKey) (WorkloadCluster, error)
}

ManagementCluster defines all behaviors necessary for something to function as a management cluster.

type RemoteClusterConnectionError added in v0.3.7 

type RemoteClusterConnectionError struct {
	Name string
	Err  error
}

RemoteClusterConnectionError represents a failure to connect to a remote cluster

func (*RemoteClusterConnectionError) Error added in v0.3.7 

func (e *RemoteClusterConnectionError) Error() string

func (*RemoteClusterConnectionError) Unwrap added in v0.3.7 

func (e *RemoteClusterConnectionError) Unwrap() error

type Workload 

type Workload struct {
	Client          ctrlclient.Client
	CoreDNSMigrator coreDNSMigrator
	// contains filtered or unexported fields
}

Workload defines operations on workload clusters.

func (*Workload) AllowBootstrapTokensToGetNodes added in v0.3.5 

func (w *Workload) AllowBootstrapTokensToGetNodes(ctx context.Context) error

AllowBootstrapTokensToGetNodes creates RBAC rules to allow Node Bootstrap Tokens to list nodes

func (*Workload) ClusterStatus 

func (w *Workload) ClusterStatus(ctx context.Context) (ClusterStatus, error)

ClusterStatus returns the status of the cluster.

func (*Workload) EnsureResource added in v0.3.5 

func (w *Workload) EnsureResource(ctx context.Context, obj runtime.Object) error

EnsureResource creates a resoutce if the target resource doesn't exist. If the resource exists already, this function will ignore the resource instead.

func (*Workload) EtcdMembers added in v0.3.11 

func (w *Workload) EtcdMembers(ctx context.Context) ([]string, error)

EtcdStatus returns the current status of the etcd cluster NOTE: This methods uses control plane machines/nodes only to get in contact with etcd, but then it relies on etcd as ultimate source of truth for the list of members. This is intended to allow informed decisions on actions impacting etcd quorum.

func (*Workload) ForwardEtcdLeadership added in v0.3.2 

func (w *Workload) ForwardEtcdLeadership(ctx context.Context, machine *clusterv1.Machine, leaderCandidate *clusterv1.Machine) error

ForwardEtcdLeadership forwards etcd leadership to the first follower

func (*Workload) IsKubernetesVersionSupported added in v0.3.23 

func (w *Workload) IsKubernetesVersionSupported(ctx context.Context, version semver.Version) (bool, error)

IsKubernetesVersionSupported checks if the Kubernetes version is supported. Kubernetes versions >= v1.22.0 for management clusters are not supported. Management clusters are identified by the existence of the KubeadmControlPlane CRD.

func (*Workload) ReconcileEtcdMembers added in v0.3.4 

func (w *Workload) ReconcileEtcdMembers(ctx context.Context, nodeNames []string, version semver.Version) ([]string, error)

ReconcileEtcdMembers iterates over all etcd members and finds members that do not have corresponding nodes. If there are any such members, it deletes them from etcd and removes their nodes from the kubeadm configmap so that kubeadm does not run etcd health checks on them.

func (*Workload) ReconcileKubeletRBACBinding 

func (w *Workload) ReconcileKubeletRBACBinding(ctx context.Context, version semver.Version) error

ReconcileKubeletRBACBinding will create a RoleBinding for the new kubelet version during upgrades. If the role binding already exists this function is a no-op.

func (*Workload) ReconcileKubeletRBACRole 

func (w *Workload) ReconcileKubeletRBACRole(ctx context.Context, version semver.Version) error

ReconcileKubeletRBACRole will create a Role for the new kubelet version during upgrades. If the role already exists this function is a no-op.

func (*Workload) RemoveEtcdMemberForMachine 

func (w *Workload) RemoveEtcdMemberForMachine(ctx context.Context, machine *clusterv1.Machine) error

RemoveEtcdMemberForMachine removes the etcd member from the target cluster's etcd cluster. Removing the last remaining member of the cluster is not supported.

func (*Workload) RemoveMachineFromKubeadmConfigMap 

func (w *Workload) RemoveMachineFromKubeadmConfigMap(ctx context.Context, machine *clusterv1.Machine, version semver.Version) error

RemoveMachineFromKubeadmConfigMap removes the entry for the machine from the kubeadm configmap.

func (*Workload) RemoveNodeFromKubeadmConfigMap added in v0.3.4 

func (w *Workload) RemoveNodeFromKubeadmConfigMap(ctx context.Context, name string, version semver.Version) error

RemoveNodeFromKubeadmConfigMap removes the entry for the node from the kubeadm configmap.

func (*Workload) UpdateAPIServerInKubeadmConfigMap added in v0.3.13 

func (w *Workload) UpdateAPIServerInKubeadmConfigMap(ctx context.Context, apiServer kubeadmv1.APIServer) error

UpdateAPIServerInKubeadmConfigMap updates api server configuration in kubeadm config map.

func (*Workload) UpdateControllerManagerInKubeadmConfigMap added in v0.3.13 

func (w *Workload) UpdateControllerManagerInKubeadmConfigMap(ctx context.Context, controllerManager kubeadmv1.ControlPlaneComponent) error

UpdateControllerManagerInKubeadmConfigMap updates controller manager configuration in kubeadm config map.

func (*Workload) UpdateCoreDNS 

func (w *Workload) UpdateCoreDNS(ctx context.Context, kcp *controlplanev1.KubeadmControlPlane, version semver.Version) error

UpdateCoreDNS updates the kubeadm configmap, coredns corefile and coredns deployment.

func (*Workload) UpdateEtcdConditions added in v0.3.11 

func (w *Workload) UpdateEtcdConditions(ctx context.Context, controlPlane *ControlPlane)

UpdateEtcdConditions is responsible for updating machine conditions reflecting the status of all the etcd members. This operation is best effort, in the sense that in case of problems in retrieving member status, it sets the condition to Unknown state without returning any error.

func (*Workload) UpdateEtcdVersionInKubeadmConfigMap 

func (w *Workload) UpdateEtcdVersionInKubeadmConfigMap(ctx context.Context, imageRepository, imageTag string) error

UpdateEtcdVersionInKubeadmConfigMap sets the imageRepository or the imageTag or both in the kubeadm config map.

func (*Workload) UpdateImageRepositoryInKubeadmConfigMap added in v0.3.3 

func (w *Workload) UpdateImageRepositoryInKubeadmConfigMap(ctx context.Context, imageRepository string) error

UpdateKubernetesVersionInKubeadmConfigMap updates the kubernetes version in the kubeadm config map.

func (*Workload) UpdateKubeProxyImageInfo 

func (w *Workload) UpdateKubeProxyImageInfo(ctx context.Context, kcp *controlplanev1.KubeadmControlPlane) error

UpdateKubeProxyImageInfo updates kube-proxy image in the kube-proxy DaemonSet.

func (*Workload) UpdateKubeletConfigMap 

func (w *Workload) UpdateKubeletConfigMap(ctx context.Context, version semver.Version) error

UpdateKubeletConfigMap will create a new kubelet-config-1.x config map for a new version of the kubelet. This is a necessary process for upgrades.

func (*Workload) UpdateKubernetesVersionInKubeadmConfigMap 

func (w *Workload) UpdateKubernetesVersionInKubeadmConfigMap(ctx context.Context, version semver.Version) error

UpdateKubernetesVersionInKubeadmConfigMap updates the kubernetes version in the kubeadm config map.

func (*Workload) UpdateSchedulerInKubeadmConfigMap added in v0.3.13 

func (w *Workload) UpdateSchedulerInKubeadmConfigMap(ctx context.Context, scheduler kubeadmv1.ControlPlaneComponent) error

UpdateSchedulerInKubeadmConfigMap updates scheduler configuration in kubeadm config map.

func (*Workload) UpdateStaticPodConditions added in v0.3.11 

func (w *Workload) UpdateStaticPodConditions(ctx context.Context, controlPlane *ControlPlane)

UpdateStaticPodConditions is responsible for updating machine conditions reflecting the status of all the control plane components running in a static pod generated by kubeadm. This operation is best effort, in the sense that in case of problems in retrieving the pod status, it sets the condition to Unknown state without returning any error.

type WorkloadCluster 

type WorkloadCluster interface {
	// Basic health and status checks.
	ClusterStatus(ctx context.Context) (ClusterStatus, error)
	UpdateStaticPodConditions(ctx context.Context, controlPlane *ControlPlane)
	UpdateEtcdConditions(ctx context.Context, controlPlane *ControlPlane)
	EtcdMembers(ctx context.Context) ([]string, error)

	// Upgrade related tasks.
	IsKubernetesVersionSupported(ctx context.Context, version semver.Version) (bool, error)
	ReconcileKubeletRBACBinding(ctx context.Context, version semver.Version) error
	ReconcileKubeletRBACRole(ctx context.Context, version semver.Version) error
	UpdateKubernetesVersionInKubeadmConfigMap(ctx context.Context, version semver.Version) error
	UpdateImageRepositoryInKubeadmConfigMap(ctx context.Context, imageRepository string) error
	UpdateEtcdVersionInKubeadmConfigMap(ctx context.Context, imageRepository, imageTag string) error
	UpdateAPIServerInKubeadmConfigMap(ctx context.Context, apiServer kubeadmv1.APIServer) error
	UpdateControllerManagerInKubeadmConfigMap(ctx context.Context, controllerManager kubeadmv1.ControlPlaneComponent) error
	UpdateSchedulerInKubeadmConfigMap(ctx context.Context, scheduler kubeadmv1.ControlPlaneComponent) error
	UpdateKubeletConfigMap(ctx context.Context, version semver.Version) error
	UpdateKubeProxyImageInfo(ctx context.Context, kcp *controlplanev1.KubeadmControlPlane) error
	UpdateCoreDNS(ctx context.Context, kcp *controlplanev1.KubeadmControlPlane, version semver.Version) error
	RemoveEtcdMemberForMachine(ctx context.Context, machine *clusterv1.Machine) error
	RemoveMachineFromKubeadmConfigMap(ctx context.Context, machine *clusterv1.Machine, version semver.Version) error
	RemoveNodeFromKubeadmConfigMap(ctx context.Context, nodeName string, version semver.Version) error
	ForwardEtcdLeadership(ctx context.Context, machine *clusterv1.Machine, leaderCandidate *clusterv1.Machine) error
	AllowBootstrapTokensToGetNodes(ctx context.Context) error

	// State recovery tasks.
	ReconcileEtcdMembers(ctx context.Context, nodeNames []string, version semver.Version) ([]string, error)
}

WorkloadCluster defines all behaviors necessary to upgrade kubernetes on a workload cluster

TODO: Add a detailed description to each of these method definitions.

Source Files

View all Source files

Directories

Path Synopsis
Package etcd provides a connection to an etcd member.
 Package etcd provides a connection to an etcd member.
fake
util

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