// 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 {
frontendNames := sortedFrontendNamesForConfig(configuration)
for _, frontendName := range frontendNames {
frontend := configuration.Frontends[frontendName]
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
}
if len(frontend.EntryPoints) == 0 {
log.Errorf("No entrypoint defined for frontend %s, defaultEntryPoints:%s. Skipping it", frontendName, globalConfiguration.DefaultEntryPoints)
continue
}
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)
}
newServerRoute := &serverRoute{route: serverEntryPoints[entryPointName].httpRouter.GetHandler().NewRoute().Name(frontendName)}
for routeName, route := range frontend.Routes {
err := getRoute(newServerRoute, &route)
if err != nil {
return nil, err
}
log.Debugf("Creating route %s %s", routeName, route.Rule)
}
entryPoint := globalConfiguration.EntryPoints[entryPointName]
if entryPoint.Redirect != nil {
if redirectHandlers[entryPointName] != nil {
newServerRoute.route.Handler(redirectHandlers[entryPointName])
} else if handler, err := server.loadEntryPointConfig(entryPointName, entryPoint); err != nil {
return nil, err
} else {
newServerRoute.route.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)
if err := rebalancer.UpsertServer(url, roundrobin.Weight(server.Weight)); err != nil {
return nil, err
}
}
case types.Wrr:
log.Debugf("Creating load-balancer wrr")
lb = 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)
if err := rr.UpsertServer(url, roundrobin.Weight(server.Weight)); err != nil {
return nil, err
}
}
}
maxConns := configuration.Backends[frontend.Backend].MaxConn
if maxConns != nil && maxConns.Amount != 0 {
extractFunc, err := utils.NewExtractor(maxConns.ExtractorFunc)
if err != nil {
return nil, err
}
log.Debugf("Creating loadd-balancer connlimit")
lb, err = connlimit.New(lb, extractFunc, maxConns.Amount, connlimit.Logger(oxyLogger))
if err != nil {
return nil, err
}
}
// retry ?
if globalConfiguration.Retry != nil {
retries := len(configuration.Backends[frontend.Backend].Servers)
if globalConfiguration.Retry.Attempts > 0 {
retries = globalConfiguration.Retry.Attempts
}
maxMem := int64(2 * 1024 * 1024)
if globalConfiguration.Retry.MaxMem > 0 {
maxMem = globalConfiguration.Retry.MaxMem
}
lb, err = stream.New(lb,
stream.Logger(oxyLogger),
stream.Retry("IsNetworkError() && Attempts() < "+strconv.Itoa(retries)),
stream.MemRequestBodyBytes(maxMem),
stream.MaxRequestBodyBytes(maxMem),
stream.MemResponseBodyBytes(maxMem),
stream.MaxResponseBodyBytes(maxMem))
log.Debugf("Creating retries max attempts %d", retries)
if err != nil {
return nil, err
}
}
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)
}
server.wireFrontendBackend(newServerRoute, backends[frontend.Backend])
}
err := newServerRoute.route.GetError()
if err != nil {
log.Errorf("Error building route: %s", err)
}
}
}
}
return serverEntryPoints, nil
}
// 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 {
frontendNames := sortedFrontendNamesForConfig(configuration)
for _, frontendName := range frontendNames {
frontend := configuration.Frontends[frontendName]
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.GetHandler().NewRoute().Name(frontendName)
for routeName, route := range frontend.Routes {
log.Debugf("Creating route %s %s:%s", routeName, route.Rule, route.Value)
route, err := getRoute(newRoute, route.Rule, route.Value)
if err != nil {
return nil, err
}
newRoute = 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 = 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)
}
server.wireFrontendBackend(frontend.Routes, newRoute, backends[frontend.Backend])
}
err := newRoute.GetError()
if err != nil {
log.Errorf("Error building route: %s", err)
}
}
}
}
return serverEntryPoints, nil
}