allocator

Documentation

Index

• type Allocator
  • func New() *Allocator
  • func (a *Allocator) Allocate(svc string, ports []Port, sharingKey, backendKey string) (net.IP, error)
  • func (a *Allocator) AllocateFromPool(svc, poolName string, ports []Port, sharingKey, backendKey string) (net.IP, error)
  • func (a *Allocator) Assign(svc string, ip net.IP, ports []Port, sharingKey, backendKey string) error
  • func (a *Allocator) IP(svc string) net.IP
  • func (a *Allocator) Pool(svc string) string
  • func (a *Allocator) SetPools(pools map[string]*config.Pool) error
  • func (a *Allocator) Unassign(svc string) bool
• type Port
  • func (p Port) String() string

Types

type Allocator

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

An Allocator tracks IP address pools and allocates addresses from them.

func New

func New() *Allocator

New returns an Allocator managing no pools.

func (*Allocator) Allocate

func (a *Allocator) Allocate(svc string, ports []Port, sharingKey, backendKey string) (net.IP, error)

Allocate assigns any available and assignable IP to service.

func (*Allocator) AllocateFromPool

func (a *Allocator) AllocateFromPool(svc, poolName string, ports []Port, sharingKey, backendKey string) (net.IP, error)

AllocateFromPool assigns an available IP from pool to service.

func (*Allocator) Assign

func (a *Allocator) Assign(svc string, ip net.IP, ports []Port, sharingKey, backendKey string) error

Assign assigns the requested ip to svc, if the assignment is permissible by sharingKey and backendKey.

func (*Allocator) IP

func (a *Allocator) IP(svc string) net.IP

IP returns the IP address allocated to service, or nil if none are allocated.

func (*Allocator) Pool

func (a *Allocator) Pool(svc string) string

Pool returns the pool from which service's IP was allocated. If service has no IP allocated, "" is returned.

func (*Allocator) SetPools

func (a *Allocator) SetPools(pools map[string]*config.Pool) error

SetPools updates the set of address pools that the allocator owns.

func (*Allocator) Unassign

func (a *Allocator) Unassign(svc string) bool

Unassign frees the IP associated with service, if any.

type Port

type Port struct {
	Proto string
	Port  int
}

Port represents one port in use by a service.

func (Port) String

func (p Port) String() string

String returns a text description of the port.