Documentation
¶
Overview ¶
Package proxy implements the layer-3 network proxy.
Index ¶
- type BaseEndpointInfo
- func (info *BaseEndpointInfo) GetIsLocal() bool
- func (info *BaseEndpointInfo) GetNodeName() string
- func (info *BaseEndpointInfo) GetZone() string
- func (info *BaseEndpointInfo) GetZoneHints() sets.Set[string]
- func (info *BaseEndpointInfo) IP() string
- func (info *BaseEndpointInfo) IsReady() bool
- func (info *BaseEndpointInfo) IsServing() bool
- func (info *BaseEndpointInfo) IsTerminating() bool
- func (info *BaseEndpointInfo) Port() (int, error)
- func (info *BaseEndpointInfo) String() string
- type BaseServicePortInfo
- func (bsvcPortInfo *BaseServicePortInfo) ClusterIP() net.IP
- func (bsvcPortInfo *BaseServicePortInfo) ExternalIPStrings() []string
- func (bsvcPortInfo *BaseServicePortInfo) ExternalPolicyLocal() bool
- func (bsvcPortInfo *BaseServicePortInfo) ExternallyAccessible() bool
- func (bsvcPortInfo *BaseServicePortInfo) HealthCheckNodePort() int
- func (bsvcPortInfo *BaseServicePortInfo) HintsAnnotation() string
- func (bsvcPortInfo *BaseServicePortInfo) InternalPolicyLocal() bool
- func (bsvcPortInfo *BaseServicePortInfo) InternalTrafficPolicy() *v1.ServiceInternalTrafficPolicy
- func (bsvcPortInfo *BaseServicePortInfo) LoadBalancerSourceRanges() []string
- func (bsvcPortInfo *BaseServicePortInfo) LoadBalancerVIPStrings() []string
- func (bsvcPortInfo *BaseServicePortInfo) NodePort() int
- func (bsvcPortInfo *BaseServicePortInfo) Port() int
- func (bsvcPortInfo *BaseServicePortInfo) Protocol() v1.Protocol
- func (bsvcPortInfo *BaseServicePortInfo) SessionAffinityType() v1.ServiceAffinity
- func (bsvcPortInfo *BaseServicePortInfo) StickyMaxAgeSeconds() int
- func (bsvcPortInfo *BaseServicePortInfo) String() string
- func (bsvcPortInfo *BaseServicePortInfo) UsesClusterEndpoints() bool
- func (bsvcPortInfo *BaseServicePortInfo) UsesLocalEndpoints() bool
- type Endpoint
- type EndpointChangeTracker
- type EndpointSliceCache
- type EndpointsMap
- type NodeEligibleHandler
- type NodePodCIDRHandler
- type Provider
- type ServiceChangeTracker
- type ServiceEndpoint
- type ServicePort
- type ServicePortMap
- type ServicePortName
- type UpdateEndpointMapResult
- type UpdateServiceMapResult
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 // ZoneHints represent the zone hints for the endpoint. This is based on // endpoint.hints.forZones[*].name in the EndpointSlice API. ZoneHints sets.Set[string] // Ready indicates whether this endpoint is ready and NOT terminating. // For pods, this is true if a pod has a ready status and a nil deletion timestamp. // This is only set when watching EndpointSlices. If using Endpoints, this is always // true since only ready endpoints are read from Endpoints. // TODO: Ready can be inferred from Serving and Terminating below when enabled by default. Ready bool // Serving indiciates whether this endpoint is ready regardless of its terminating state. // For pods this is true if it has a ready status regardless of its deletion timestamp. // This is only set when watching EndpointSlices. If using Endpoints, this is always // true since only ready endpoints are read from Endpoints. Serving bool // Terminating indicates whether this endpoint is terminating. // For pods this is true if it has a non-nil deletion timestamp. // This is only set when watching EndpointSlices. If using Endpoints, this is always // false since terminating endpoints are always excluded from Endpoints. Terminating bool // NodeName is the name of the node this endpoint belongs to NodeName string // Zone is the name of the zone this endpoint belongs to Zone 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) GetIsLocal ¶ added in v1.10.0
func (info *BaseEndpointInfo) GetIsLocal() bool
GetIsLocal is part of proxy.Endpoint interface.
func (*BaseEndpointInfo) GetNodeName ¶ added in v1.22.0
func (info *BaseEndpointInfo) GetNodeName() string
GetNodeName returns the NodeName for this endpoint.
func (*BaseEndpointInfo) GetZone ¶ added in v1.22.0
func (info *BaseEndpointInfo) GetZone() string
GetZone returns the Zone for this endpoint.
func (*BaseEndpointInfo) GetZoneHints ¶ added in v1.21.0
func (info *BaseEndpointInfo) GetZoneHints() sets.Set[string]
GetZoneHints returns the zone hint for 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) IsReady ¶ added in v1.21.0
func (info *BaseEndpointInfo) IsReady() bool
IsReady returns true if an endpoint is ready and not terminating.
func (*BaseEndpointInfo) IsServing ¶ added in v1.21.0
func (info *BaseEndpointInfo) IsServing() bool
IsServing returns true if an endpoint is ready, regardless of if the endpoint is terminating.
func (*BaseEndpointInfo) IsTerminating ¶ added in v1.21.0
func (info *BaseEndpointInfo) IsTerminating() bool
IsTerminating retruns true if an endpoint is terminating. For pods, that is any pod with a deletion timestamp.
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 BaseServicePortInfo ¶ added in v1.26.0
type BaseServicePortInfo struct {
// contains filtered or unexported fields
}
BaseServicePortInfo 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 (*BaseServicePortInfo) ClusterIP ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) ClusterIP() net.IP
ClusterIP is part of ServicePort interface.
func (*BaseServicePortInfo) ExternalIPStrings ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) ExternalIPStrings() []string
ExternalIPStrings is part of ServicePort interface.
func (*BaseServicePortInfo) ExternalPolicyLocal ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) ExternalPolicyLocal() bool
ExternalPolicyLocal is part of ServicePort interface.
func (*BaseServicePortInfo) ExternallyAccessible ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) ExternallyAccessible() bool
ExternallyAccessible is part of ServicePort interface.
func (*BaseServicePortInfo) HealthCheckNodePort ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) HealthCheckNodePort() int
HealthCheckNodePort is part of ServicePort interface.
func (*BaseServicePortInfo) HintsAnnotation ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) HintsAnnotation() string
HintsAnnotation is part of ServicePort interface.
func (*BaseServicePortInfo) InternalPolicyLocal ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) InternalPolicyLocal() bool
InternalPolicyLocal is part of ServicePort interface
func (*BaseServicePortInfo) InternalTrafficPolicy ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) InternalTrafficPolicy() *v1.ServiceInternalTrafficPolicy
InternalTrafficPolicy is part of ServicePort interface
func (*BaseServicePortInfo) LoadBalancerSourceRanges ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) LoadBalancerSourceRanges() []string
LoadBalancerSourceRanges is part of ServicePort interface
func (*BaseServicePortInfo) LoadBalancerVIPStrings ¶ added in v1.29.0
func (bsvcPortInfo *BaseServicePortInfo) LoadBalancerVIPStrings() []string
LoadBalancerVIPStrings is part of ServicePort interface.
func (*BaseServicePortInfo) NodePort ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) NodePort() int
NodePort is part of the ServicePort interface.
func (*BaseServicePortInfo) Port ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) Port() int
Port is part of ServicePort interface.
func (*BaseServicePortInfo) Protocol ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) Protocol() v1.Protocol
Protocol is part of ServicePort interface.
func (*BaseServicePortInfo) SessionAffinityType ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) SessionAffinityType() v1.ServiceAffinity
SessionAffinityType is part of the ServicePort interface.
func (*BaseServicePortInfo) StickyMaxAgeSeconds ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) StickyMaxAgeSeconds() int
StickyMaxAgeSeconds is part of the ServicePort interface
func (*BaseServicePortInfo) String ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) String() string
String is part of ServicePort interface.
func (*BaseServicePortInfo) UsesClusterEndpoints ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) UsesClusterEndpoints() bool
UsesClusterEndpoints is part of ServicePort interface.
func (*BaseServicePortInfo) UsesLocalEndpoints ¶ added in v1.26.0
func (bsvcPortInfo *BaseServicePortInfo) UsesLocalEndpoints() bool
UsesLocalEndpoints 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 // IsReady returns true if an endpoint is ready and not terminating. // This is only set when watching EndpointSlices. If using Endpoints, this is always // true since only ready endpoints are read from Endpoints. IsReady() bool // IsServing returns true if an endpoint is ready. It does not account // for terminating state. // This is only set when watching EndpointSlices. If using Endpoints, this is always // true since only ready endpoints are read from Endpoints. IsServing() bool // IsTerminating returns true if an endpoint is terminating. For pods, // that is any pod with a deletion timestamp. // This is only set when watching EndpointSlices. If using Endpoints, this is always // false since terminating endpoints are always excluded from Endpoints. IsTerminating() bool // GetZoneHints returns the zone hint for the endpoint. This is based on // endpoint.hints.forZones[0].name in the EndpointSlice API. GetZoneHints() sets.Set[string] // IP returns IP part of the endpoint. IP() string // Port returns the Port part of the endpoint. Port() (int, error) // GetNodeName returns the node name for the endpoint GetNodeName() string // GetZone returns the zone for the endpoint GetZone() string }
Endpoint in an interface which abstracts information about an endpoint. TODO: Rename functions to be consistent with ServicePort.
func CategorizeEndpoints ¶ added in v1.24.0
func CategorizeEndpoints(endpoints []Endpoint, svcInfo ServicePort, nodeLabels map[string]string) (clusterEndpoints, localEndpoints, allReachableEndpoints []Endpoint, hasAnyEndpoints bool)
CategorizeEndpoints returns:
The service's usable Cluster-traffic-policy endpoints (taking topology into account, if relevant). This will be nil if the service does not ever use Cluster traffic policy.
The service's usable Local-traffic-policy endpoints (including terminating endpoints, if relevant). This will be nil if the service does not ever use Local traffic policy.
The combined list of all endpoints reachable from this node (which is the union of the previous two lists, but in the case where it is identical to one or the other, we avoid allocating a separate list).
An indication of whether the service has any endpoints reachable from anywhere in the cluster. (This may be true even if allReachableEndpoints is empty.)
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, ipFamily v1.IPFamily, recorder events.EventRecorder, 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) PendingChanges ¶ added in v1.26.0
func (ect *EndpointChangeTracker) PendingChanges() sets.Set[string]
PendingChanges returns a set whose keys are the names of the services whose endpoints have changed since the last time ect was used to update an EndpointsMap. (You must call this _before_ calling em.Update(ect).)
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, ipFamily v1.IPFamily, recorder events.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) LocalReadyEndpoints ¶ added in v1.27.0
func (em EndpointsMap) LocalReadyEndpoints() map[types.NamespacedName]int
LocalReadyEndpoints returns a map of Service names to the number of local ready endpoints for that service.
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 NodeEligibleHandler ¶ added in v1.28.0
type NodeEligibleHandler struct {
HealthServer healthcheck.ProxierHealthUpdater
}
NodeEligibleHandler handles the life cycle of the Node's eligibility, as determined by the health server for directing load balancer traffic.
func (*NodeEligibleHandler) OnNodeAdd ¶ added in v1.28.0
func (n *NodeEligibleHandler) OnNodeAdd(node *v1.Node)
OnNodeAdd is a handler for Node creates.
func (*NodeEligibleHandler) OnNodeDelete ¶ added in v1.28.0
func (n *NodeEligibleHandler) OnNodeDelete(node *v1.Node)
OnNodeDelete is a handler for Node deletes.
func (*NodeEligibleHandler) OnNodeSynced ¶ added in v1.28.0
func (n *NodeEligibleHandler) OnNodeSynced()
OnNodeSynced is a handler for Node syncs.
func (*NodeEligibleHandler) OnNodeUpdate ¶ added in v1.28.0
func (n *NodeEligibleHandler) OnNodeUpdate(_, node *v1.Node)
OnNodeUpdate is a handler for Node updates.
type NodePodCIDRHandler ¶ added in v1.23.14
type NodePodCIDRHandler struct {
// contains filtered or unexported fields
}
NodePodCIDRHandler handles the life cycle of kube-proxy based on the node PodCIDR assigned Implements the config.NodeHandler interface https://issues.k8s.io/111321
func NewNodePodCIDRHandler ¶ added in v1.24.15
func NewNodePodCIDRHandler(podCIDRs []string) *NodePodCIDRHandler
func (*NodePodCIDRHandler) OnNodeAdd ¶ added in v1.23.14
func (n *NodePodCIDRHandler) OnNodeAdd(node *v1.Node)
OnNodeAdd is a handler for Node creates.
func (*NodePodCIDRHandler) OnNodeDelete ¶ added in v1.23.14
func (n *NodePodCIDRHandler) OnNodeDelete(node *v1.Node)
OnNodeDelete is a handler for Node deletes.
func (*NodePodCIDRHandler) OnNodeSynced ¶ added in v1.23.14
func (n *NodePodCIDRHandler) OnNodeSynced()
OnNodeSynced is a handler for Node syncs.
func (*NodePodCIDRHandler) OnNodeUpdate ¶ added in v1.23.14
func (n *NodePodCIDRHandler) OnNodeUpdate(_, node *v1.Node)
OnNodeUpdate is a handler for Node updates.
type Provider ¶ added in v1.16.0
type Provider interface { 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, ipFamily v1.IPFamily, recorder events.EventRecorder, processServiceMapChange processServiceMapChangeFunc) *ServiceChangeTracker
NewServiceChangeTracker initializes a ServiceChangeTracker
func (*ServiceChangeTracker) PendingChanges ¶ added in v1.26.0
func (sct *ServiceChangeTracker) PendingChanges() sets.Set[string]
PendingChanges returns a set whose keys are the names of the services that have changed since the last time sct was used to update a ServiceMap. (You must call this _before_ calling sm.Update(sct).)
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 ServicePort ¶ added in v1.10.0
type ServicePort interface { // String returns service string. An example format can be: `IP:Port/Protocol`. String() string // ClusterIP returns service cluster IP in net.IP format. ClusterIP() net.IP // Port returns service port if present. If return 0 means not present. Port() int // SessionAffinityType returns service session affinity type SessionAffinityType() v1.ServiceAffinity // StickyMaxAgeSeconds returns service max connection age StickyMaxAgeSeconds() int // ExternalIPStrings returns service ExternalIPs as a string array. ExternalIPStrings() []string // LoadBalancerVIPStrings returns service LoadBalancerIPs which are VIP mode as a string array. LoadBalancerVIPStrings() []string // Protocol returns service protocol. Protocol() v1.Protocol // LoadBalancerSourceRanges returns service LoadBalancerSourceRanges if present empty array if not LoadBalancerSourceRanges() []string // HealthCheckNodePort returns service health check node port if present. If return 0, it means not present. HealthCheckNodePort() int // NodePort returns a service Node port if present. If return 0, it means not present. NodePort() int // ExternalPolicyLocal returns if a service has only node local endpoints for external traffic. ExternalPolicyLocal() bool // InternalPolicyLocal returns if a service has only node local endpoints for internal traffic. InternalPolicyLocal() bool // InternalTrafficPolicy returns service InternalTrafficPolicy InternalTrafficPolicy() *v1.ServiceInternalTrafficPolicy // HintsAnnotation returns the value of the v1.DeprecatedAnnotationTopologyAwareHints annotation. HintsAnnotation() string // ExternallyAccessible returns true if the service port is reachable via something // other than ClusterIP (NodePort/ExternalIP/LoadBalancer) ExternallyAccessible() bool // UsesClusterEndpoints returns true if the service port ever sends traffic to // endpoints based on "Cluster" traffic policy UsesClusterEndpoints() bool // UsesLocalEndpoints returns true if the service port ever sends traffic to // endpoints based on "Local" traffic policy UsesLocalEndpoints() bool }
ServicePort is an interface which abstracts information about a service.
type ServicePortMap ¶ added in v1.26.0
type ServicePortMap map[ServicePortName]ServicePort
ServicePortMap maps a service to its ServicePort.
func (ServicePortMap) HealthCheckNodePorts ¶ added in v1.27.0
func (sm ServicePortMap) HealthCheckNodePorts() map[types.NamespacedName]uint16
HealthCheckNodePorts returns a map of Service names to HealthCheckNodePort values for all Services in sm with non-zero HealthCheckNodePort.
func (ServicePortMap) Update ¶ added in v1.26.0
func (sm ServicePortMap) Update(changes *ServiceChangeTracker) (result UpdateServiceMapResult)
Update updates ServicePortMap base on the given changes.
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 { // DeletedUDPEndpoints identifies UDP endpoints that have just been deleted. // Existing conntrack NAT entries pointing to these endpoints must be deleted to // ensure that no further traffic for the Service gets delivered to them. DeletedUDPEndpoints []ServiceEndpoint // NewlyActiveUDPServices identifies UDP Services that have just gone from 0 to // non-0 endpoints. Existing conntrack entries caching the fact that these // services are black holes must be deleted to ensure that traffic can immediately // begin flowing to the new endpoints. NewlyActiveUDPServices []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 { // DeletedUDPClusterIPs 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. DeletedUDPClusterIPs sets.Set[string] }
UpdateServiceMapResult is the updated results after applying service changes.
Source Files
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Directories
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Path | Synopsis |
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Package config provides decoupling between various configuration sources (etcd, files,...) and the pieces that actually care about them (loadbalancer, proxy).
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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.
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Package healthcheck provides tools for serving kube-proxy healthchecks. |