ipam

Documentation

Overview

Package ipam provides different allocators for assigning IP ranges to nodes. We currently support several kinds of IPAM allocators (these are denoted by the CIDRAllocatorType):

• RangeAllocator is an allocator that assigns PodCIDRs to nodes and works in conjunction with the RouteController to configure the network to get connectivity.
• CloudAllocator is an allocator that synchronizes PodCIDRs from IP ranges assignments from the underlying cloud platform.
• (Alpha only) IPAMFromCluster is an allocator that has the similar functionality as the RangeAllocator but also synchronizes cluster-managed ranges into the cloud platform.
• (Alpha only) IPAMFromCloud is the same as CloudAllocator (synchronizes from cloud into the cluster.)

Index

• type CIDRAllocator
  • func New(kubeClient clientset.Interface, nodeInformer informers.NodeInformer, ...) (CIDRAllocator, error)
  • func NewCIDRRangeAllocator(client clientset.Interface, nodeInformer informers.NodeInformer, ...) (CIDRAllocator, error)
• type CIDRAllocatorType
• type Timeout
  • func (b *Timeout) Next() time.Duration
  • func (b *Timeout) Update(ok bool)

Types

type CIDRAllocator

type CIDRAllocator interface {
	// AllocateOrOccupyCIDR looks at the given node, assigns it a valid
	// CIDR if it doesn't currently have one or mark the CIDR as used if
	// the node already have one.
	AllocateOrOccupyCIDR(node *v1.Node) error
	// ReleaseCIDR releases the CIDR of the removed node
	ReleaseCIDR(node *v1.Node) error
	// Run starts all the working logic of the allocator.
	Run(stopCh <-chan struct{})
}

CIDRAllocator is an interface implemented by things that know how to allocate/occupy/recycle CIDR for nodes.

func New

func New(kubeClient clientset.Interface, nodeInformer informers.NodeInformer, allocatorType CIDRAllocatorType, clusterCIDR, serviceCIDR *net.IPNet, nodeCIDRMaskSize int) (CIDRAllocator, error)

New creates a new CIDR range allocator.

func NewCIDRRangeAllocator

func NewCIDRRangeAllocator(client clientset.Interface, nodeInformer informers.NodeInformer, clusterCIDR *net.IPNet, serviceCIDR *net.IPNet, subNetMaskSize int, nodeList *v1.NodeList) (CIDRAllocator, error)

NewCIDRRangeAllocator returns a CIDRAllocator to allocate CIDR for node Caller must ensure subNetMaskSize is not less than cluster CIDR mask size. Caller must always pass in a list of existing nodes so the new allocator can initialize its CIDR map. NodeList is only nil in testing.

type CIDRAllocatorType

type CIDRAllocatorType string

CIDRAllocatorType is the type of the allocator to use.

const (
	// RangeAllocatorType is the allocator that uses an internal CIDR
	// range allocator to do node CIDR range allocations.
	RangeAllocatorType CIDRAllocatorType = "RangeAllocator"
)

type Timeout

type Timeout struct {
	// Resync is the default timeout duration when there are no errors.
	Resync time.Duration
	// MaxBackoff is the maximum timeout when in a error backoff state.
	MaxBackoff time.Duration
	// InitialRetry is the initial retry interval when an error is reported.
	InitialRetry time.Duration
	// contains filtered or unexported fields
}

Timeout manages the resync loop timing for a given node sync operation. The timeout changes depending on whether or not there was an error reported for the operation. Consecutive errors will result in exponential backoff to a maxBackoff timeout.

func (*Timeout) Next

func (b *Timeout) Next() time.Duration

Next returns the next operation timeout given the disposition of err.

func (*Timeout) Update

func (b *Timeout) Update(ok bool)

Update the timeout with the current error state.