proxy

package
v1.19.12 Latest Latest
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 Go to latest Published: Jun 16, 2021 License: Apache-2.0 Imports: 19 Imported by: 442

Documentation

Overview

Package proxy implements the layer-3 network proxy.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type BaseEndpointInfo added in v1.10.0 

type BaseEndpointInfo struct {
	Endpoint string // TODO: should be an endpointString type
	// IsLocal indicates whether the endpoint is running in same host as kube-proxy.
	IsLocal  bool
	Topology map[string]string
}

BaseEndpointInfo contains base information that defines an endpoint. This could be used directly by proxier while processing endpoints, or can be used for constructing a more specific EndpointInfo struct defined by the proxier if needed.

func (*BaseEndpointInfo) Equal added in v1.10.0 

func (info *BaseEndpointInfo) Equal(other Endpoint) bool

Equal is part of proxy.Endpoint interface.

func (*BaseEndpointInfo) GetIsLocal added in v1.10.0 

func (info *BaseEndpointInfo) GetIsLocal() bool

GetIsLocal is part of proxy.Endpoint interface.

func (*BaseEndpointInfo) GetTopology added in v1.17.0 

func (info *BaseEndpointInfo) GetTopology() map[string]string

GetTopology returns the topology information of the endpoint.

func (*BaseEndpointInfo) IP added in v1.10.0 

func (info *BaseEndpointInfo) IP() string

IP returns just the IP part of the endpoint, it's a part of proxy.Endpoint interface.

func (*BaseEndpointInfo) Port added in v1.10.0 

func (info *BaseEndpointInfo) Port() (int, error)

Port returns just the Port part of the endpoint.

func (*BaseEndpointInfo) String added in v1.10.0 

func (info *BaseEndpointInfo) String() string

String is part of proxy.Endpoint interface.

type BaseServiceInfo added in v1.10.0 

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

BaseServiceInfo contains base information that defines a service. This could be used directly by proxier while processing services, or can be used for constructing a more specific ServiceInfo struct defined by the proxier if needed.

func (*BaseServiceInfo) ClusterIP added in v1.10.0 

func (info *BaseServiceInfo) ClusterIP() net.IP

ClusterIP is part of ServicePort interface.

func (*BaseServiceInfo) ExternalIPStrings added in v1.13.11 

func (info *BaseServiceInfo) ExternalIPStrings() []string

ExternalIPStrings is part of ServicePort interface.

func (*BaseServiceInfo) HealthCheckNodePort added in v1.10.0 

func (info *BaseServiceInfo) HealthCheckNodePort() int

HealthCheckNodePort is part of ServicePort interface.

func (*BaseServiceInfo) LoadBalancerIPStrings added in v1.13.11 

func (info *BaseServiceInfo) LoadBalancerIPStrings() []string

LoadBalancerIPStrings is part of ServicePort interface.

func (*BaseServiceInfo) LoadBalancerSourceRanges added in v1.10.0 

func (info *BaseServiceInfo) LoadBalancerSourceRanges() []string

LoadBalancerSourceRanges is part of ServicePort interface

func (*BaseServiceInfo) NodePort added in v1.10.0 

func (info *BaseServiceInfo) NodePort() int

NodePort is part of the ServicePort interface.

func (*BaseServiceInfo) OnlyNodeLocalEndpoints added in v1.10.0 

func (info *BaseServiceInfo) OnlyNodeLocalEndpoints() bool

OnlyNodeLocalEndpoints is part of ServicePort interface.

func (*BaseServiceInfo) Port added in v1.10.0 

func (info *BaseServiceInfo) Port() int

Port is part of ServicePort interface.

func (*BaseServiceInfo) Protocol added in v1.10.0 

func (info *BaseServiceInfo) Protocol() v1.Protocol

Protocol is part of ServicePort interface.

func (*BaseServiceInfo) SessionAffinityType added in v1.10.0 

func (info *BaseServiceInfo) SessionAffinityType() v1.ServiceAffinity

SessionAffinityType is part of the ServicePort interface.

func (*BaseServiceInfo) StickyMaxAgeSeconds added in v1.10.0 

func (info *BaseServiceInfo) StickyMaxAgeSeconds() int

StickyMaxAgeSeconds is part of the ServicePort interface

func (*BaseServiceInfo) String added in v1.10.0 

func (info *BaseServiceInfo) String() string

String is part of ServicePort interface.

func (*BaseServiceInfo) TopologyKeys added in v1.17.0 

func (info *BaseServiceInfo) TopologyKeys() []string

TopologyKeys is part of ServicePort interface.

type Endpoint added in v1.10.0 

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

Endpoint in an interface which abstracts information about an endpoint. TODO: Rename functions to be consistent with ServicePort.

func FilterTopologyEndpoint added in v1.17.0 

func FilterTopologyEndpoint(nodeLabels map[string]string, topologyKeys []string, endpoints []Endpoint) []Endpoint

FilterTopologyEndpoint returns the appropriate endpoints based on the cluster topology. This uses the current node's labels, which contain topology information, and the required topologyKeys to find appropriate endpoints. If both the endpoint's topology and the current node have matching values for topologyKeys[0], the endpoint will be chosen. If no endpoints are chosen, toplogyKeys[1] will be considered, and so on. If either the node or the endpoint do not have values for a key, it is considered to not match.

If topologyKeys is specified, but no endpoints are chosen for any key, the the service has no viable endpoints for clients on this node, and connections should fail.

The special key "*" may be used as the last entry in topologyKeys to indicate "any endpoint" is acceptable.

If topologyKeys is not specified or empty, no topology constraints will be applied and this will return all endpoints.

type EndpointChangeTracker added in v1.10.0 

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 added in v1.10.0 

func NewEndpointChangeTracker(hostname string, makeEndpointInfo makeEndpointFunc, isIPv6Mode *bool, recorder record.EventRecorder, endpointSlicesEnabled bool, processEndpointsMapChange processEndpointsMapChangeFunc) *EndpointChangeTracker

NewEndpointChangeTracker initializes an EndpointsChangeMap

func (*EndpointChangeTracker) EndpointSliceUpdate added in v1.16.0 

func (ect *EndpointChangeTracker) EndpointSliceUpdate(endpointSlice *discovery.EndpointSlice, removeSlice bool) bool

EndpointSliceUpdate updates given service's endpoints change map based on the <previous, current> endpoints pair. It returns true if items changed, otherwise return false. Will add/update/delete items of EndpointsChangeMap. If removeSlice is true, slice will be removed, otherwise it will be added or updated.

func (*EndpointChangeTracker) Update added in v1.10.0 

func (ect *EndpointChangeTracker) Update(previous, current *v1.Endpoints) 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 EndpointSliceCache added in v1.16.0 

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

EndpointSliceCache is used as a cache of EndpointSlice information.

func NewEndpointSliceCache added in v1.16.0 

func NewEndpointSliceCache(hostname string, isIPv6Mode *bool, recorder record.EventRecorder, makeEndpointInfo makeEndpointFunc) *EndpointSliceCache

NewEndpointSliceCache initializes an EndpointSliceCache.

type EndpointsMap added in v1.10.0 

type EndpointsMap map[ServicePortName][]Endpoint

EndpointsMap maps a service name to a list of all its Endpoints.

func (EndpointsMap) Update added in v1.15.0 

func (em EndpointsMap) Update(changes *EndpointChangeTracker) (result UpdateEndpointMapResult)

Update updates endpointsMap base on the given changes.

type Provider added in v1.16.0 

type Provider interface {
	config.EndpointsHandler
	config.EndpointSliceHandler
	config.ServiceHandler
	config.NodeHandler

	// Sync immediately synchronizes the Provider'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()
}

Provider is the interface provided by proxier implementations.

type ServiceChangeTracker added in v1.10.0 

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 added in v1.10.0 

func NewServiceChangeTracker(makeServiceInfo makeServicePortFunc, isIPv6Mode *bool, recorder record.EventRecorder, processServiceMapChange processServiceMapChangeFunc) *ServiceChangeTracker

NewServiceChangeTracker initializes a ServiceChangeTracker

func (*ServiceChangeTracker) Update added in v1.10.0 

func (sct *ServiceChangeTracker) Update(previous, current *v1.Service) 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.

type ServiceEndpoint added in v1.10.0 

type ServiceEndpoint struct {
	Endpoint        string
	ServicePortName ServicePortName
}

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

type ServiceMap added in v1.10.0 

type ServiceMap map[ServicePortName]ServicePort

ServiceMap maps a service to its ServicePort.

type ServicePort added in v1.10.0 

type ServicePort interface {
	// String returns service string.  An example format can be: `IP:Port/Protocol`.
	String() string
	// GetClusterIP returns service cluster IP in net.IP format.
	ClusterIP() net.IP
	// GetPort returns service port if present. If return 0 means not present.
	Port() int
	// GetSessionAffinityType returns service session affinity type
	SessionAffinityType() v1.ServiceAffinity
	// GetStickyMaxAgeSeconds returns service max connection age
	StickyMaxAgeSeconds() int
	// ExternalIPStrings returns service ExternalIPs as a string array.
	ExternalIPStrings() []string
	// LoadBalancerIPStrings returns service LoadBalancerIPs as a string array.
	LoadBalancerIPStrings() []string
	// GetProtocol returns service protocol.
	Protocol() v1.Protocol
	// LoadBalancerSourceRanges returns service LoadBalancerSourceRanges if present empty array if not
	LoadBalancerSourceRanges() []string
	// GetHealthCheckNodePort returns service health check node port if present.  If return 0, it means not present.
	HealthCheckNodePort() int
	// GetNodePort returns a service Node port if present. If return 0, it means not present.
	NodePort() int
	// GetOnlyNodeLocalEndpoints returns if a service has only node local endpoints
	OnlyNodeLocalEndpoints() bool
	// TopologyKeys returns service TopologyKeys as a string array.
	TopologyKeys() []string
}

ServicePort is an interface which abstracts information about a service.

type ServicePortName added in v0.15.0 

type ServicePortName struct {
	types.NamespacedName
	Port     string
	Protocol v1.Protocol
}

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

func (ServicePortName) String added in v0.15.0 

func (spn ServicePortName) String() string

type UpdateEndpointMapResult added in v1.10.0 

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
	// List of the trigger times for all endpoints objects that changed. It's used to export the
	// network programming latency.
	// NOTE(oxddr): this can be simplified to []time.Time if memory consumption becomes an issue.
	LastChangeTriggerTimes map[types.NamespacedName][]time.Time
}

UpdateEndpointMapResult is the updated results after applying endpoints changes.

type UpdateServiceMapResult added in v1.10.0 

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 added in v1.10.0 

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

UpdateServiceMap updates ServiceMap based on the given changes.

Source Files

View all Source files

Directories

Path Synopsis
config
config/fuzzer
config/scheme
config/v1alpha1
config/validation
Package config provides decoupling between various configuration sources (etcd, files,...) and the pieces that actually care about them (loadbalancer, proxy).
 Package config provides decoupling between various configuration sources (etcd, files,...) and the pieces that actually care about them (loadbalancer, proxy).
Package healthcheck provides tools for serving kube-proxy healthchecks.
 Package healthcheck provides tools for serving kube-proxy healthchecks.
testing
iptables
testing

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