Exemplo n.º 1
0
// LoadConfig returns a new gorrilla.mux Route from the specified global configuration and the dynamic
// provider configurations.
func LoadConfig(configurations configs, globalConfiguration *GlobalConfiguration) (*mux.Router, error) {
	router := mux.NewRouter()
	router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
	backends := map[string]http.Handler{}
	for _, configuration := range configurations {
		for frontendName, frontend := range configuration.Frontends {
			log.Debugf("Creating frontend %s", frontendName)
			fwd, _ := forward.New(forward.Logger(oxyLogger), forward.PassHostHeader(frontend.PassHostHeader))
			newRoute := router.NewRoute().Name(frontendName)
			for routeName, route := range frontend.Routes {
				log.Debugf("Creating route %s %s:%s", routeName, route.Rule, route.Value)
				newRouteReflect, err := invoke(newRoute, route.Rule, route.Value)
				if err != nil {
					return nil, err
				}
				newRoute = newRouteReflect[0].Interface().(*mux.Route)
			}
			if backends[frontend.Backend] == nil {
				log.Debugf("Creating backend %s", frontend.Backend)
				var lb http.Handler
				rr, _ := roundrobin.New(fwd)
				if configuration.Backends[frontend.Backend] == nil {
					return nil, errors.New("Backend not found: " + frontend.Backend)
				}
				lbMethod, err := types.NewLoadBalancerMethod(configuration.Backends[frontend.Backend].LoadBalancer)
				if err != nil {
					configuration.Backends[frontend.Backend].LoadBalancer = &types.LoadBalancer{Method: "wrr"}
				}
				switch lbMethod {
				case types.Drr:
					log.Infof("Creating load-balancer drr")
					rebalancer, _ := roundrobin.NewRebalancer(rr, roundrobin.RebalancerLogger(oxyLogger))
					lb = rebalancer
					for serverName, server := range configuration.Backends[frontend.Backend].Servers {
						url, err := url.Parse(server.URL)
						if err != nil {
							return nil, err
						}
						log.Infof("Creating server %s %s", serverName, url.String())
						rebalancer.UpsertServer(url, roundrobin.Weight(server.Weight))
					}
				case types.Wrr:
					log.Infof("Creating load-balancer wrr")
					lb = middlewares.NewWebsocketUpgrader(rr)
					for serverName, server := range configuration.Backends[frontend.Backend].Servers {
						url, err := url.Parse(server.URL)
						if err != nil {
							return nil, err
						}
						log.Infof("Creating server %s %s", serverName, url.String())
						rr.UpsertServer(url, roundrobin.Weight(server.Weight))
					}
				}
				var negroni = negroni.New()
				if configuration.Backends[frontend.Backend].CircuitBreaker != nil {
					log.Infof("Creating circuit breaker %s", configuration.Backends[frontend.Backend].CircuitBreaker.Expression)
					negroni.Use(middlewares.NewCircuitBreaker(lb, configuration.Backends[frontend.Backend].CircuitBreaker.Expression, cbreaker.Logger(oxyLogger)))
				} else {
					negroni.UseHandler(lb)
				}
				backends[frontend.Backend] = negroni
			} else {
				log.Infof("Reusing backend %s", frontend.Backend)
			}
			//		stream.New(backends[frontend.Backend], stream.Retry("IsNetworkError() && Attempts() <= " + strconv.Itoa(globalConfiguration.Replay)), stream.Logger(oxyLogger))

			newRoute.Handler(backends[frontend.Backend])
			err := newRoute.GetError()
			if err != nil {
				log.Errorf("Error building route: %s", err)
			}
		}
	}
	return router, nil
}
Exemplo n.º 2
0
// LoadConfig returns a new gorilla.mux Route from the specified global configuration and the dynamic
// provider configurations.
func (server *Server) loadConfig(configurations configs, globalConfiguration GlobalConfiguration) (map[string]serverEntryPoint, error) {
	serverEntryPoints := server.buildEntryPoints(globalConfiguration)
	redirectHandlers := make(map[string]http.Handler)

	backends := map[string]http.Handler{}
	for _, configuration := range configurations {
		for frontendName, frontend := range configuration.Frontends {
			log.Debugf("Creating frontend %s", frontendName)
			fwd, _ := forward.New(forward.Logger(oxyLogger), forward.PassHostHeader(frontend.PassHostHeader))
			// default endpoints if not defined in frontends
			if len(frontend.EntryPoints) == 0 {
				frontend.EntryPoints = globalConfiguration.DefaultEntryPoints
			}
			for _, entryPointName := range frontend.EntryPoints {
				log.Debugf("Wiring frontend %s to entryPoint %s", frontendName, entryPointName)
				if _, ok := serverEntryPoints[entryPointName]; !ok {
					return nil, errors.New("Undefined entrypoint: " + entryPointName)
				}
				newRoute := serverEntryPoints[entryPointName].httpRouter.NewRoute().Name(frontendName)
				for routeName, route := range frontend.Routes {
					log.Debugf("Creating route %s %s:%s", routeName, route.Rule, route.Value)
					newRouteReflect, err := invoke(newRoute, route.Rule, route.Value)
					if err != nil {
						return nil, err
					}
					newRoute = newRouteReflect[0].Interface().(*mux.Route)
				}
				entryPoint := globalConfiguration.EntryPoints[entryPointName]
				if entryPoint.Redirect != nil {
					if redirectHandlers[entryPointName] != nil {
						newRoute.Handler(redirectHandlers[entryPointName])
					} else if handler, err := server.loadEntryPointConfig(entryPointName, entryPoint); err != nil {
						return nil, err
					} else {
						newRoute.Handler(handler)
						redirectHandlers[entryPointName] = handler
					}
				} else {
					if backends[frontend.Backend] == nil {
						log.Debugf("Creating backend %s", frontend.Backend)
						var lb http.Handler
						rr, _ := roundrobin.New(fwd)
						if configuration.Backends[frontend.Backend] == nil {
							return nil, errors.New("Undefined backend: " + frontend.Backend)
						}
						lbMethod, err := types.NewLoadBalancerMethod(configuration.Backends[frontend.Backend].LoadBalancer)
						if err != nil {
							configuration.Backends[frontend.Backend].LoadBalancer = &types.LoadBalancer{Method: "wrr"}
						}
						switch lbMethod {
						case types.Drr:
							log.Debugf("Creating load-balancer drr")
							rebalancer, _ := roundrobin.NewRebalancer(rr, roundrobin.RebalancerLogger(oxyLogger))
							lb = rebalancer
							for serverName, server := range configuration.Backends[frontend.Backend].Servers {
								url, err := url.Parse(server.URL)
								if err != nil {
									return nil, err
								}
								log.Debugf("Creating server %s at %s with weight %d", serverName, url.String(), server.Weight)
								rebalancer.UpsertServer(url, roundrobin.Weight(server.Weight))
							}
						case types.Wrr:
							log.Debugf("Creating load-balancer wrr")
							lb = middlewares.NewWebsocketUpgrader(rr)
							for serverName, server := range configuration.Backends[frontend.Backend].Servers {
								url, err := url.Parse(server.URL)
								if err != nil {
									return nil, err
								}
								log.Debugf("Creating server %s at %s with weight %d", serverName, url.String(), server.Weight)
								rr.UpsertServer(url, roundrobin.Weight(server.Weight))
							}
						}
						var negroni = negroni.New()
						if configuration.Backends[frontend.Backend].CircuitBreaker != nil {
							log.Debugf("Creating circuit breaker %s", configuration.Backends[frontend.Backend].CircuitBreaker.Expression)
							negroni.Use(middlewares.NewCircuitBreaker(lb, configuration.Backends[frontend.Backend].CircuitBreaker.Expression, cbreaker.Logger(oxyLogger)))
						} else {
							negroni.UseHandler(lb)
						}
						backends[frontend.Backend] = negroni
					} else {
						log.Debugf("Reusing backend %s", frontend.Backend)
					}
					newRoute.Handler(backends[frontend.Backend])
				}
				err := newRoute.GetError()
				if err != nil {
					log.Errorf("Error building route: %s", err)
				}
			}
		}
	}
	return serverEntryPoints, nil
}