nodedrain

Documentation

Index

• Constants
• func IdentifyNonMigratableVMS(vmiList []*kubevirtv1.VirtualMachineInstance) map[string][]string
• func Register(ctx context.Context, management *config.Management, _ config.Options) error
• type ControllerHandler
  • func ActionHelper(nodeCache ctlcorev1.NodeCache, ...) *ControllerHandler
  • func (ndc *ControllerHandler) CheckVMISchedulingRequirements(originalNode *corev1.Node, vmiList []*kubevirtv1.VirtualMachineInstance) ([]string, error)
  • func (ndc *ControllerHandler) FindNonMigratableVMS(node *corev1.Node) (map[string][]string, error)
  • func (ndc *ControllerHandler) OnNodeChange(_ string, node *corev1.Node) (*corev1.Node, error)

Constants

const (
	LastHealthyReplicaKey               = "LastHealthyReplica"
	ContainerDiskOrCDRomKey             = "CDRomOrContainerDiskPresent"
	NodeSchedulingRequirementsNotMetKey = "NodeSchedulingRequirementsNotMet"
)

Functions

func IdentifyNonMigratableVMS

func IdentifyNonMigratableVMS(vmiList []*kubevirtv1.VirtualMachineInstance) map[string][]string

IdentifyNonMigratableVMS finds VMI's with kubevirtv1.VirtualMachineInstanceIsMigratable condition set to false

func Register

func Register(ctx context.Context, management *config.Management, _ config.Options) error

Types

type ControllerHandler

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

ControllerHandler to drain nodes. the controller checks if node has any replicas which may be the only working replica for a VM and attempts to shutdown the VM before the drain is initiated. This ensures that no data is lost when the instance-managers are terminated as part of the drain process

func ActionHelper

func ActionHelper(nodeCache ctlcorev1.NodeCache, virtualMachineInstanceCache ctlkubevirtv1.VirtualMachineInstanceCache,
	longhornVolumeCache ctllhv1.VolumeCache, longhornReplicaCache ctllhv1.ReplicaCache) *ControllerHandler

func (*ControllerHandler) CheckVMISchedulingRequirements

func (ndc *ControllerHandler) CheckVMISchedulingRequirements(originalNode *corev1.Node, vmiList []*kubevirtv1.VirtualMachineInstance) ([]string, error)

CheckVMISchedulingRequirements checks if the VMI can be scheduled on another node the function will check additional nodes that * are able to satisfy the NodeSelectors terms specified in RequiredDuringSchedulingIgnoredDuringExecution * and node is ready

func (*ControllerHandler) FindNonMigratableVMS

func (ndc *ControllerHandler) FindNonMigratableVMS(node *corev1.Node) (map[string][]string, error)

FindNonMigratableVMS is called by action handler to leverage caches to find unhealthy VM's impacted by the migration

func (*ControllerHandler) OnNodeChange

func (ndc *ControllerHandler) OnNodeChange(_ string, node *corev1.Node) (*corev1.Node, error)

OnNodeChange handles reconcile logic for node drains