ceohelpers

package
v0.0.0-alpha.0....-eeef803 Latest Latest
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 Go to latest Published: Mar 14, 2024 License: Apache-2.0 Imports: 33 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// DelayedHABootstrapScalingStrategyAnnotation is an annotation on the openshift-etcd
	// namespace which, if present indicates the DelayedHAScalingStrategy strategy
	// should be used.
	DelayedHABootstrapScalingStrategyAnnotation = "openshift.io/delayed-ha-bootstrap"
)
View Source 
const InfrastructureClusterName = "cluster"
View Source 
const MachineDeletionHookName = "EtcdQuorumOperator"

MachineDeletionHookName holds a name of the Machine Deletion Hook

View Source 
const MachineDeletionHookOwner = "clusteroperator/etcd"

MachineDeletionHookOwner holds an owner of the Machine Deletion Hook

Variables

This section is empty.

Functions

func CheckSafeToScaleCluster 

func CheckSafeToScaleCluster(
	configmapLister corev1listers.ConfigMapLister,
	staticPodClient v1helpers.StaticPodOperatorClient,
	namespaceLister corev1listers.NamespaceLister,
	infraLister configv1listers.InfrastructureLister,
	etcdClient etcdcli.AllMemberLister) error

CheckSafeToScaleCluster is used to implement the bootstrap scaling strategy invariants. This function returns nil if cluster conditions are such that it's safe to scale the etcd cluster based on the scaling strategy in use, and otherwise will return an error explaining why it's unsafe to scale.

func CurrentMemberMachinesWithDeletionHooks 

func CurrentMemberMachinesWithDeletionHooks(machineSelector labels.Selector, machineLister machinelistersv1beta1.MachineLister) ([]*machinev1beta1.Machine, error)

CurrentMemberMachinesWithDeletionHooks returns machines with the deletion hooks from the lister

func FilterMachinesPendingDeletion 

func FilterMachinesPendingDeletion(machines []*machinev1beta1.Machine) []*machinev1beta1.Machine

FilterMachinesPendingDeletion a convenience function for filtering machines pending deletion

func FilterMachinesWithMachineDeletionHook 

func FilterMachinesWithMachineDeletionHook(machines []*machinev1beta1.Machine) []*machinev1beta1.Machine

FilterMachinesWithMachineDeletionHook a convenience function for filtering only machines with the machine deletion hook present

func FilterMachinesWithoutMachineDeletionHook 

func FilterMachinesWithoutMachineDeletionHook(machines []*machinev1beta1.Machine) []*machinev1beta1.Machine

FilterMachinesWithoutMachineDeletionHook a convenience function for filtering only machines without the machine deletion hook present

func FindMachineByNodeInternalIP 

func FindMachineByNodeInternalIP(nodeInternalIP string, machineSelector labels.Selector, machineLister machinelistersv1beta1.MachineLister) (*machinev1beta1.Machine, error)

FindMachineByNodeInternalIP finds the machine that matches the given nodeInternalIP is safe because the MAO: 

syncs the addresses in the Machine with those assigned to real nodes by the cloud provider,
checks that the Machine and Node lists match before issuing a serving certification for the kubelet
when the host disappears from the cloud side, it stops updating the Machine so the addresses and information
should persist there as a tombstone as the Machine is marked Failed

func GetControlPlaneTopology 

func GetControlPlaneTopology(infraLister configv1listers.InfrastructureLister) (configv1.TopologyMode, error)

func HasMachineDeletionHook 

func HasMachineDeletionHook(machine *machinev1beta1.Machine) bool

HasMachineDeletionHook simply checks if the given machine has the machine deletion hook present

func IndexMachinesByNodeInternalIP 

func IndexMachinesByNodeInternalIP(machines []*machinev1beta1.Machine) map[string]*machinev1beta1.Machine

IndexMachinesByNodeInternalIP maps machines to IPs

Note that a machine can have multiple internal IPs with different types (v4/v6)

func IsBootstrapComplete 

func IsBootstrapComplete(configMapClient corev1listers.ConfigMapLister, staticPodClient v1helpers.StaticPodOperatorClient, etcdClient etcdcli.AllMemberLister) (bool, error)

IsBootstrapComplete returns true if bootstrap has completed.

func IsSingleNodeTopology 

func IsSingleNodeTopology(infraLister configv1listers.InfrastructureLister) (bool, error)

func MemberToNodeInternalIP 

func MemberToNodeInternalIP(member *etcdserverpb.Member) (string, error)

MemberToNodeInternalIP extracts assigned IP address from the given member

func NewAlreadySyncedInformer 

func NewAlreadySyncedInformer(informer cache.SharedInformer) cache.SharedInformer

func ReadDesiredControlPlaneReplicasCount 

func ReadDesiredControlPlaneReplicasCount(operatorClient v1helpers.StaticPodOperatorClient) (int, error)

ReadDesiredControlPlaneReplicasCount reads the current Control Plane replica count

func VotingMemberIPListSet 

func VotingMemberIPListSet(ctx context.Context, cli etcdcli.EtcdClient) (sets.String, error)

Types

type AlreadySyncedInformer 

type AlreadySyncedInformer struct {
	cache.SharedInformer
}

AlreadySyncedInformer wraps an ordinary cache.SharedInformer, but allows us to fake HasSynced results. This is to allow controllers to proceed when an informer could not sync (eg when the API isn't available).

func (*AlreadySyncedInformer) HasSynced 

func (s *AlreadySyncedInformer) HasSynced() bool

type AlwaysSafeQuorumChecker 

type AlwaysSafeQuorumChecker struct {
}

AlwaysSafeQuorumChecker can be used for testing and always returns that it is safe to update a revision

func (*AlwaysSafeQuorumChecker) IsSafeToUpdateRevision 

func (c *AlwaysSafeQuorumChecker) IsSafeToUpdateRevision() (bool, error)

IsSafeToUpdateRevision always returns true, nil

type BootstrapScalingStrategy 

type BootstrapScalingStrategy string

BootstrapScalingStrategy describes the invariants which will be enforced when scaling the etcd cluster. 

const (
	// HAScalingStrategy means the etcd cluster will only be scaled up when at least
	// 3 node are available so that HA is enforced at all times. This rule applies
	// during bootstrapping and the steady state.
	//
	// This is the default strategy.
	HAScalingStrategy BootstrapScalingStrategy = "HAScalingStrategy"

	// DelayedHAScalingStrategy means that during bootstrapping, the etcd cluster will
	// be allowed to scale when at least 2 members are available (which is not HA),
	// but after bootstrapping any further scaling will require 3 nodes in the same
	// way as HAScalingStrategy.
	//
	// This strategy is selected by adding the `openshift.io/delayed-ha-bootstrap`
	// annotation to the openshift-etcd namesapce.
	DelayedHAScalingStrategy BootstrapScalingStrategy = "DelayedHAScalingStrategy"

	// BootstrapInPlaceStrategy means that the bootstrap node will never exist
	// during the lifecycle of the cluster. Bootkube will run on a live iso
	// afterwards the node will pivot into the manifests generated during that
	// process.
	//
	// This strategy is selected by observing the existence of `bootstrapInPlace`
	// root key in the install-config.
	BootstrapInPlaceStrategy BootstrapScalingStrategy = "BootstrapInPlaceStrategy"

	// UnsafeScalingStrategy means scaling will occur without regards to nodes and
	// any effect on quorum. Use of this strategy isn't officially tested or supported,
	// but is made available for ad-hoc use.
	//
	// This strategy is selected by setting unsupportedConfigOverrides on the
	// operator config.
	UnsafeScalingStrategy BootstrapScalingStrategy = "UnsafeScalingStrategy"
)

func GetBootstrapScalingStrategy 

func GetBootstrapScalingStrategy(staticPodClient v1helpers.StaticPodOperatorClient, namespaceLister corev1listers.NamespaceLister, infraLister configv1listers.InfrastructureLister) (BootstrapScalingStrategy, error)

GetBootstrapScalingStrategy determines the scaling strategy to use

type MachineAPI 

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

MachineAPI a simple struct that helps determine if the Machine API is functional

Note: 

since this type needs to take into account only master machine objects
make sure machineInformer contain only filtered data
otherwise it might be expensive to react to every node update in larger installations

as a safety net this type requires masterMachineSelector, just in case a caller won't provide a filtered informer

func NewMachineAPI 

func NewMachineAPI(masterMachineInformer cache.SharedIndexInformer,
	masterMachineLister machinelistersv1beta1.MachineLister,
	masterMachineSelector labels.Selector,
	versionInformer configv1informers.ClusterVersionInformer,
	dynamicClient dynamic.Interface) *MachineAPI

func (*MachineAPI) IsAvailable 

func (m *MachineAPI) IsAvailable() (bool, error)

IsAvailable checks if the Machine API is available as an API on the API server.

func (*MachineAPI) IsEnabled 

func (m *MachineAPI) IsEnabled() (bool, error)

IsEnabled checks if the Machine API is enabled. As of today Machine API is enabled when: * clusterVersionInformer is synced * clusterVersion has "MachineAPI" as an enabled capability This method might not be reliable under some configuration, thus it's important to also check whether it IsAvailable

func (*MachineAPI) IsFunctional 

func (m *MachineAPI) IsFunctional() (bool, error)

IsFunctional checks if the Machine API is (enabled OR available) AND functional. As of today Machine API is functional when: * clusterVersionInformer is synced * clusterVersion has MachineAPI as an enabled capability OR the API enabled on the api server * MachineInformer is synced * we find at least one Machine resources in the Running state.

type MachineAPIChecker 

type MachineAPIChecker interface {
	// IsFunctional checks if the Machine API is functional (that requires it to be either enabled OR available)
	IsFunctional() (bool, error)
	// IsEnabled checks if the Machine API is enabled via CVO
	IsEnabled() (bool, error)
	// IsAvailable checks if the Machine API is available on the API server
	IsAvailable() (bool, error)
}

MachineAPIChecker captures a set of functions for working with the Machine API

type QuorumCheck 

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

QuorumCheck is just a convenience struct around bootstrap.go

func (*QuorumCheck) IsSafeToUpdateRevision 

func (c *QuorumCheck) IsSafeToUpdateRevision() (bool, error)

type QuorumChecker 

type QuorumChecker interface {
	// IsSafeToUpdateRevision checks the current etcd cluster and returns true if the cluster can tolerate the
	// loss of a single etcd member. Such loss is common during new static pod revision.
	// Returns True when it is absolutely safe, false if not. Error otherwise, which always indicates it is unsafe.
	IsSafeToUpdateRevision() (bool, error)
}

func NewQuorumChecker 

func NewQuorumChecker(
	configMapLister corev1listers.ConfigMapLister,
	namespaceLister corev1listers.NamespaceLister,
	infraLister configv1listers.InfrastructureLister,
	operatorClient v1helpers.StaticPodOperatorClient,
	etcdClient etcdcli.AllMemberLister,
) QuorumChecker

Source Files

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