package udp import ( "context" "errors" "fmt" "net" "github.com/traefik/traefik/v2/pkg/config/runtime" "github.com/traefik/traefik/v2/pkg/log" "github.com/traefik/traefik/v2/pkg/server/provider" "github.com/traefik/traefik/v2/pkg/udp" ) // Manager handles UDP services creation. type Manager struct { configs map[string]*runtime.UDPServiceInfo } // NewManager creates a new manager. func NewManager(conf *runtime.Configuration) *Manager { return &Manager{ configs: conf.UDPServices, } } // BuildUDP creates the UDP handler for the given service name. func (m *Manager) BuildUDP(rootCtx context.Context, serviceName string) (udp.Handler, error) { serviceQualifiedName := provider.GetQualifiedName(rootCtx, serviceName) ctx := provider.AddInContext(rootCtx, serviceQualifiedName) ctx = log.With(ctx, log.Str(log.ServiceName, serviceName)) conf, ok := m.configs[serviceQualifiedName] if !ok { return nil, fmt.Errorf("the udp service %q does not exist", serviceQualifiedName) } if conf.LoadBalancer != nil && conf.Weighted != nil { err := errors.New("cannot create service: multi-types service not supported, consider declaring two different pieces of service instead") conf.AddError(err, true) return nil, err } logger := log.FromContext(ctx) switch { case conf.LoadBalancer != nil: loadBalancer := udp.NewWRRLoadBalancer() for name, server := range conf.LoadBalancer.Servers { if _, _, err := net.SplitHostPort(server.Address); err != nil { logger.Errorf("In udp service %q: %v", serviceQualifiedName, err) continue } handler, err := udp.NewProxy(server.Address) if err != nil { logger.Errorf("In udp service %q server %q: %v", serviceQualifiedName, server.Address, err) continue } loadBalancer.AddServer(handler) logger.WithField(log.ServerName, name).Debugf("Creating UDP server %d at %s", name, server.Address) } return loadBalancer, nil case conf.Weighted != nil: loadBalancer := udp.NewWRRLoadBalancer() for _, service := range conf.Weighted.Services { handler, err := m.BuildUDP(rootCtx, service.Name) if err != nil { logger.Errorf("In udp service %q: %v", serviceQualifiedName, err) return nil, err } loadBalancer.AddWeightedServer(handler, service.Weight) } return loadBalancer, nil default: err := fmt.Errorf("the udp service %q does not have any type defined", serviceQualifiedName) conf.AddError(err, true) return nil, err } }