Golang slice.CopyStrings函数代码示例

// OnEndpointsUpdate takes in a slice of updated endpoints.
func (proxier *Proxier) OnEndpointsUpdate(allEndpoints []api.Endpoints) {
	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.haveReceivedEndpointsUpdate = true

	registeredEndpoints := make(map[proxy.ServicePortName]bool) // use a map as a set

	// Update endpoints for services.
	for i := range allEndpoints {
		svcEndpoints := &allEndpoints[i]

		// We need to build a map of portname -> all ip:ports for that
		// portname.  Explode Endpoints.Subsets[*] into this structure.
		portsToEndpoints := map[string][]hostPortPair{}
		for i := range svcEndpoints.Subsets {
			ss := &svcEndpoints.Subsets[i]
			for i := range ss.Ports {
				port := &ss.Ports[i]
				for i := range ss.Addresses {
					addr := &ss.Addresses[i]
					portsToEndpoints[port.Name] = append(portsToEndpoints[port.Name], hostPortPair{addr.IP, port.Port})
				}
			}
		}

		for portname := range portsToEndpoints {
			svcPort := proxy.ServicePortName{NamespacedName: types.NamespacedName{Namespace: svcEndpoints.Namespace, Name: svcEndpoints.Name}, Port: portname}
			state, exists := proxier.serviceMap[svcPort]
			if !exists || state == nil {
				state = newServiceInfo(svcPort)
				proxier.serviceMap[svcPort] = state
			}
			curEndpoints := []string{}
			if state != nil {
				curEndpoints = state.endpoints
			}
			newEndpoints := flattenValidEndpoints(portsToEndpoints[portname])

			if len(curEndpoints) != len(newEndpoints) || !slicesEquiv(slice.CopyStrings(curEndpoints), newEndpoints) {
				glog.V(1).Infof("Setting endpoints for %s to %+v", svcPort, newEndpoints)
				state.endpoints = newEndpoints
			}
			registeredEndpoints[svcPort] = true
		}
	}
	// Remove endpoints missing from the update.
	for service, info := range proxier.serviceMap {
		// if missing from update and not already set by previous endpoints event
		if _, exists := registeredEndpoints[service]; !exists && info.endpoints != nil {
			glog.V(2).Infof("Removing endpoints for %s", service)
			// Set the endpoints to nil, we will check for this in OnServiceUpdate so that we
			// only remove ServicePorts that have no endpoints and were not in the service update,
			// that way we only remove ServicePorts that were not in both.
			proxier.serviceMap[service].endpoints = nil
		}
	}

	proxier.syncProxyRules()
}

// OnEndpointsUpdate takes in a slice of updated endpoints.
func (proxier *Proxier) OnEndpointsUpdate(allEndpoints []api.Endpoints) {
	start := time.Now()
	defer func() {
		glog.V(4).Infof("OnEndpointsUpdate took %v for %d endpoints", time.Since(start), len(allEndpoints))
	}()

	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.haveReceivedEndpointsUpdate = true

	activeEndpoints := make(map[proxy.ServicePortName]bool) // use a map as a set

	// Update endpoints for services.
	for i := range allEndpoints {
		svcEndpoints := &allEndpoints[i]

		// We need to build a map of portname -> all ip:ports for that
		// portname.  Explode Endpoints.Subsets[*] into this structure.
		portsToEndpoints := map[string][]hostPortPair{}
		for i := range svcEndpoints.Subsets {
			ss := &svcEndpoints.Subsets[i]
			for i := range ss.Ports {
				port := &ss.Ports[i]
				for i := range ss.Addresses {
					addr := &ss.Addresses[i]
					portsToEndpoints[port.Name] = append(portsToEndpoints[port.Name], hostPortPair{addr.IP, port.Port})
				}
			}
		}

		for portname := range portsToEndpoints {
			svcPort := proxy.ServicePortName{NamespacedName: types.NamespacedName{Namespace: svcEndpoints.Namespace, Name: svcEndpoints.Name}, Port: portname}
			curEndpoints := proxier.endpointsMap[svcPort]
			newEndpoints := flattenValidEndpoints(portsToEndpoints[portname])
			if len(curEndpoints) != len(newEndpoints) || !slicesEquiv(slice.CopyStrings(curEndpoints), newEndpoints) {
				glog.V(1).Infof("Setting endpoints for %q to %+v", svcPort, newEndpoints)
				proxier.endpointsMap[svcPort] = newEndpoints
			}
			activeEndpoints[svcPort] = true
		}
	}

	// Remove endpoints missing from the update.
	for name := range proxier.endpointsMap {
		if !activeEndpoints[name] {
			glog.V(2).Infof("Removing endpoints for %q", name)
			delete(proxier.endpointsMap, name)
		}
	}

	proxier.syncProxyRules()
}

// OnEndpointsUpdate manages the registered service endpoints.
// Registered endpoints are updated if found in the update set or
// unregistered if missing from the update set.
func (lb *LoadBalancerRR) OnEndpointsUpdate(allEndpoints []api.Endpoints) {
	registeredEndpoints := make(map[proxy.ServicePortName]bool)
	lb.lock.Lock()
	defer lb.lock.Unlock()

	// Update endpoints for services.
	for i := range allEndpoints {
		svcEndpoints := &allEndpoints[i]

		// We need to build a map of portname -> all ip:ports for that
		// portname.  Explode Endpoints.Subsets[*] into this structure.
		portsToEndpoints := map[string][]hostPortPair{}
		for i := range svcEndpoints.Subsets {
			ss := &svcEndpoints.Subsets[i]
			for i := range ss.Ports {
				port := &ss.Ports[i]
				for i := range ss.Addresses {
					addr := &ss.Addresses[i]
					portsToEndpoints[port.Name] = append(portsToEndpoints[port.Name], hostPortPair{addr.IP, int(port.Port)})
					// Ignore the protocol field - we'll get that from the Service objects.
				}
			}
		}

		for portname := range portsToEndpoints {
			svcPort := proxy.ServicePortName{NamespacedName: types.NamespacedName{Namespace: svcEndpoints.Namespace, Name: svcEndpoints.Name}, Port: portname}
			state, exists := lb.services[svcPort]
			curEndpoints := []string{}
			if state != nil {
				curEndpoints = state.endpoints
			}
			newEndpoints := flattenValidEndpoints(portsToEndpoints[portname])

			if !exists || state == nil || len(curEndpoints) != len(newEndpoints) || !slicesEquiv(slice.CopyStrings(curEndpoints), newEndpoints) {
				glog.V(1).Infof("LoadBalancerRR: Setting endpoints for %s to %+v", svcPort, newEndpoints)
				lb.updateAffinityMap(svcPort, newEndpoints)
				// OnEndpointsUpdate can be called without NewService being called externally.
				// To be safe we will call it here.  A new service will only be created
				// if one does not already exist.  The affinity will be updated
				// later, once NewService is called.
				state = lb.newServiceInternal(svcPort, api.ServiceAffinity(""), 0)
				state.endpoints = slice.ShuffleStrings(newEndpoints)

				// Reset the round-robin index.
				state.index = 0
			}
			registeredEndpoints[svcPort] = true
		}
	}
	// Remove endpoints missing from the update.
	for k := range lb.services {
		if _, exists := registeredEndpoints[k]; !exists {
			glog.V(2).Infof("LoadBalancerRR: Removing endpoints for %s", k)
			// Reset but don't delete.
			state := lb.services[k]
			state.endpoints = []string{}
			state.index = 0
			state.affinity.affinityMap = map[string]*affinityState{}
		}
	}
}

// OnEndpointsUpdate takes in a slice of updated endpoints.
func (proxier *Proxier) OnEndpointsUpdate(allEndpoints []api.Endpoints) {
	start := time.Now()
	defer func() {
		glog.V(4).Infof("OnEndpointsUpdate took %v for %d endpoints", time.Since(start), len(allEndpoints))
	}()

	proxier.mu.Lock()
	defer proxier.mu.Unlock()
	proxier.haveReceivedEndpointsUpdate = true

	activeEndpoints := make(map[proxy.ServicePortName]bool) // use a map as a set
	staleConnections := make(map[endpointServicePair]bool)
	svcPortToInfoMap := make(map[proxy.ServicePortName][]hostPortInfo)

	// Update endpoints for services.
	for i := range allEndpoints {
		svcEndpoints := &allEndpoints[i]

		// We need to build a map of portname -> all ip:ports for that
		// portname.  Explode Endpoints.Subsets[*] into this structure.
		portsToEndpoints := map[string][]hostPortInfo{}
		for i := range svcEndpoints.Subsets {
			ss := &svcEndpoints.Subsets[i]
			for i := range ss.Ports {
				port := &ss.Ports[i]
				for i := range ss.Addresses {
					addr := &ss.Addresses[i]
					var isLocalEndpoint bool
					if addr.NodeName != nil {
						isLocalEndpoint = *addr.NodeName == proxier.hostname
						isLocalEndpoint = featuregate.DefaultFeatureGate.ExternalTrafficLocalOnly() && isLocalEndpoint
					}
					hostPortObject := hostPortInfo{
						host:          addr.IP,
						port:          int(port.Port),
						localEndpoint: isLocalEndpoint,
					}
					portsToEndpoints[port.Name] = append(portsToEndpoints[port.Name], hostPortObject)
				}
			}
		}
		for portname := range portsToEndpoints {
			svcPort := proxy.ServicePortName{NamespacedName: types.NamespacedName{Namespace: svcEndpoints.Namespace, Name: svcEndpoints.Name}, Port: portname}
			svcPortToInfoMap[svcPort] = portsToEndpoints[portname]
			curEndpoints := proxier.endpointsMap[svcPort]
			newEndpoints := flattenValidEndpoints(portsToEndpoints[portname])
			// Flatten the list of current endpoint infos to just a list of ips as strings
			curEndpointIPs := flattenEndpointsInfo(curEndpoints)
			if len(curEndpointIPs) != len(newEndpoints) || !slicesEquiv(slice.CopyStrings(curEndpointIPs), newEndpoints) {
				removedEndpoints := getRemovedEndpoints(curEndpointIPs, newEndpoints)
				for _, ep := range removedEndpoints {
					staleConnections[endpointServicePair{endpoint: ep, servicePortName: svcPort}] = true
				}
				glog.V(3).Infof("Setting endpoints for %q to %+v", svcPort, newEndpoints)
				// Once the set operations using the list of ips are complete, build the list of endpoint infos
				proxier.endpointsMap[svcPort] = proxier.buildEndpointInfoList(portsToEndpoints[portname], newEndpoints)
			}
			activeEndpoints[svcPort] = true
		}
	}
	// Remove endpoints missing from the update.
	for svcPort := range proxier.endpointsMap {
		if !activeEndpoints[svcPort] {
			// record endpoints of unactive service to stale connections
			for _, ep := range proxier.endpointsMap[svcPort] {
				staleConnections[endpointServicePair{endpoint: ep.ip, servicePortName: svcPort}] = true
			}

			glog.V(2).Infof("Removing endpoints for %q", svcPort)
			delete(proxier.endpointsMap, svcPort)
		}

		proxier.updateHealthCheckEntries(svcPort.NamespacedName, svcPortToInfoMap[svcPort])
	}
	proxier.syncProxyRules()
	proxier.deleteEndpointConnections(staleConnections)
}