proxy

Documentation

Overview

Package proxy implements the layer-3 network proxy.

Index

• func GetLocalEndpointIPs(endpointsMap EndpointsMap) map[types.NamespacedName]sets.String
• type Endpoint
• type EndpointChangeTracker
  • func NewEndpointChangeTracker(hostname string) *EndpointChangeTracker
  • func (ect *EndpointChangeTracker) Update(previous, current *api.Endpoints, ...) bool
• type EndpointsMap
  • func (em EndpointsMap) Merge(other EndpointsMap)
  • func (em EndpointsMap) Unmerge(other EndpointsMap)
• type ProxyProvider
• type ServiceChangeTracker
  • func NewServiceChangeTracker() *ServiceChangeTracker
  • func (sct *ServiceChangeTracker) Update(previous, current *api.Service, ...) bool
• type ServiceEndpoint
• type ServiceMap
• type ServicePort
• type ServicePortName
  • func (spn ServicePortName) String() string
• type UpdateEndpointMapResult
  • func UpdateEndpointsMap(endpointsMap EndpointsMap, changes *EndpointChangeTracker) (result UpdateEndpointMapResult)
• type UpdateServiceMapResult
  • func UpdateServiceMap(serviceMap ServiceMap, changes *ServiceChangeTracker) (result UpdateServiceMapResult)

Functions

func GetLocalEndpointIPs

func GetLocalEndpointIPs(endpointsMap EndpointsMap) map[types.NamespacedName]sets.String

GetLocalEndpointIPs returns endpoints IPs if given endpoint is local - local means the endpoint is running in same host as kube-proxy.

Types

type Endpoint

type Endpoint interface {
	// String returns endpoint string.  An example format can be: `IP:Port`.
	// We take the returned value as ServiceEndpoint.Endpoint.
	String() string
	// IsLocal returns true if the endpoint is running in same host as kube-proxy, otherwise returns false.
	IsLocal() bool
	// IP returns IP part of endpoints.
	IP() string
	// Equal checks if two endpoints are equal.
	Equal(Endpoint) bool
}

Endpoint in an interface which abstracts information about an endpoint.

type EndpointChangeTracker

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

EndpointChangeTracker carries state about uncommitted changes to an arbitrary number of Endpoints, keyed by their namespace and name.

func NewEndpointChangeTracker

func NewEndpointChangeTracker(hostname string) *EndpointChangeTracker

NewEndpointChangeTracker initializes an EndpointsChangeMap

func (*EndpointChangeTracker) Update

func (ect *EndpointChangeTracker) Update(previous, current *api.Endpoints, makeEndpoints func(IP string, port int, isLocal bool) Endpoint) bool

Update updates given service's endpoints change map based on the <previous, current> endpoints pair. It returns true if items changed, otherwise return false. Update can be used to add/update/delete items of EndpointsChangeMap. For example, Add item

• pass <nil, endpoints> as the <previous, current> pair.

Update item

• pass <oldEndpoints, endpoints> as the <previous, current> pair.

Delete item

• pass <endpoints, nil> as the <previous, current> pair.

type EndpointsMap

type EndpointsMap map[ServicePortName][]Endpoint

EndpointsMap maps a service to one of its endpoint.

func (EndpointsMap) Merge

func (em EndpointsMap) Merge(other EndpointsMap)

Merge ensures that the current EndpointsMap contains all <service, endpoints> pairs from the EndpointsMap passed in.

func (EndpointsMap) Unmerge

func (em EndpointsMap) Unmerge(other EndpointsMap)

Unmerge removes the <service, endpoints> pairs from the current EndpointsMap which are contained in the EndpointsMap passed in.

type ProxyProvider

type ProxyProvider interface {
	// Sync immediately synchronizes the ProxyProvider's current state to proxy rules.
	Sync()
	// SyncLoop runs periodic work.
	// This is expected to run as a goroutine or as the main loop of the app.
	// It does not return.
	SyncLoop()
}

ProxyProvider is the interface provided by proxier implementations.

type ServiceChangeTracker

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

ServiceChangeTracker carries state about uncommitted changes to an arbitrary number of Services, keyed by their namespace and name.

func NewServiceChangeTracker

func NewServiceChangeTracker() *ServiceChangeTracker

NewServiceChangeTracker initializes a ServiceChangeTracker

func (*ServiceChangeTracker) Update

func (sct *ServiceChangeTracker) Update(previous, current *api.Service, makeServicePort func(servicePort *api.ServicePort, service *api.Service) ServicePort) bool

Update updates given service's change map based on the <previous, current> service pair. It returns true if items changed, otherwise return false. Update can be used to add/update/delete items of ServiceChangeMap. For example, Add item

• pass <nil, service> as the <previous, current> pair.

Update item

• pass <oldService, service> as the <previous, current> pair.

Delete item

• pass <service, nil> as the <previous, current> pair.

makeServicePort() return a proxy.ServicePort based on the given Service and its ServicePort. We inject makeServicePort() so that giving caller side a chance to initialize proxy.ServicePort interface.

type ServiceEndpoint

type ServiceEndpoint struct {
	Endpoint        string
	ServicePortName ServicePortName
}

ServiceEndpoint is used to identify a service and one of its endpoint pair.

type ServiceMap

type ServiceMap map[ServicePortName]ServicePort

ServiceMap maps a service to its ServicePort information.

type ServicePort

type ServicePort interface {
	// String returns service string.  An example format can be: `IP:Port/Protocol`.
	String() string
	// ClusterIP returns service cluster IP.
	ClusterIP() string
	// Protocol returns service protocol.
	Protocol() api.Protocol
	// HealthCheckNodePort returns service health check node port if present.  If return 0, it means not present.
	HealthCheckNodePort() int
}

ServicePort is an interface which abstracts information about a service.

type ServicePortName

type ServicePortName struct {
	types.NamespacedName
	Port string
}

ServicePortName carries a namespace + name + portname. This is the unique identifier for a load-balanced service.

func (ServicePortName) String

func (spn ServicePortName) String() string

type UpdateEndpointMapResult

type UpdateEndpointMapResult struct {
	// HCEndpointsLocalIPSize maps an endpoints name to the length of its local IPs.
	HCEndpointsLocalIPSize map[types.NamespacedName]int
	// StaleEndpoints identifies if an endpoints service pair is stale.
	StaleEndpoints []ServiceEndpoint
	// StaleServiceNames identifies if a service is stale.
	StaleServiceNames []ServicePortName
}

UpdateEndpointMapResult is the updated results after applying endpoints changes.

func UpdateEndpointsMap

func UpdateEndpointsMap(endpointsMap EndpointsMap, changes *EndpointChangeTracker) (result UpdateEndpointMapResult)

UpdateEndpointsMap updates endpointsMap base on the given changes.

type UpdateServiceMapResult

type UpdateServiceMapResult struct {
	// HCServiceNodePorts is a map of Service names to node port numbers which indicate the health of that Service on this Node.
	// The value(uint16) of HCServices map is the service health check node port.
	HCServiceNodePorts map[types.NamespacedName]uint16
	// UDPStaleClusterIP holds stale (no longer assigned to a Service) Service IPs that had UDP ports.
	// Callers can use this to abort timeout-waits or clear connection-tracking information.
	UDPStaleClusterIP sets.String
}

UpdateServiceMapResult is the updated results after applying service changes.

func UpdateServiceMap

func UpdateServiceMap(serviceMap ServiceMap, changes *ServiceChangeTracker) (result UpdateServiceMapResult)

UpdateServiceMap updates ServiceMap based on the given changes.