Main file refactoring, extract a Server object

This commit is contained in:
emile 2016-01-13 22:45:49 +01:00
parent b906e9361f
commit a0b15a0efd
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GPG key ID: D808B4C167352E59
5 changed files with 416 additions and 353 deletions

View file

@ -35,7 +35,7 @@ func notFoundHandler(w http.ResponseWriter, r *http.Request) {
}
// LoadDefaultConfig returns a default gorrilla.mux router from the specified configuration.
func LoadDefaultConfig(globalConfiguration *GlobalConfiguration) *mux.Router {
func LoadDefaultConfig(globalConfiguration GlobalConfiguration) *mux.Router {
router := mux.NewRouter()
router.NotFoundHandler = http.HandlerFunc(notFoundHandler)
return router

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@ -146,4 +146,8 @@ import:
ref: d8a3071799b98cacd30b6da92f536050ccfe6da4
- package: github.com/golang/glog
ref: fca8c8854093a154ff1eb580aae10276ad6b1b5f
- package: github.com/spf13/cast
version: ee7b3e0353166ab1f3a605294ac8cd2b77953778
- package: github.com/spf13/viper
version: a212099cbe6fbe8d07476bfda8d2d39b6ff8f325

369
server.go Normal file
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@ -0,0 +1,369 @@
/*
Copyright
*/
package main
import (
"crypto/tls"
"errors"
log "github.com/Sirupsen/logrus"
"github.com/codegangsta/negroni"
"github.com/emilevauge/traefik/middlewares"
"github.com/emilevauge/traefik/provider"
"github.com/emilevauge/traefik/types"
"github.com/gorilla/mux"
"github.com/mailgun/manners"
"github.com/mailgun/oxy/cbreaker"
"github.com/mailgun/oxy/forward"
"github.com/mailgun/oxy/roundrobin"
"net/http"
"net/url"
"os"
"os/signal"
"reflect"
"sync"
"syscall"
"time"
)
// Server is the reverse-proxy/load-balancer engine
type Server struct {
srv *manners.GracefulServer
configurationRouter *mux.Router
configurationChan chan types.ConfigMessage
configurationChanValidated chan types.ConfigMessage
sigs chan os.Signal
stopChan chan bool
providers []provider.Provider
serverLock sync.Mutex
currentConfigurations configs
globalConfiguration GlobalConfiguration
loggerMiddleware *middlewares.Logger
}
// NewServer returns an initialized Server.
func NewServer(globalConfiguration GlobalConfiguration) *Server {
server := new(Server)
server.configurationChan = make(chan types.ConfigMessage, 10)
server.configurationChanValidated = make(chan types.ConfigMessage, 10)
server.sigs = make(chan os.Signal, 1)
server.stopChan = make(chan bool)
server.providers = []provider.Provider{}
signal.Notify(server.sigs, syscall.SIGINT, syscall.SIGTERM)
server.currentConfigurations = make(configs)
server.globalConfiguration = globalConfiguration
server.loggerMiddleware = middlewares.NewLogger(globalConfiguration.AccessLogsFile)
return server
}
// Start starts the server and blocks until server is shutted down.
func (server *Server) Start() {
server.configurationRouter = LoadDefaultConfig(server.globalConfiguration)
go server.listenProviders()
go server.enableRouter()
server.configureProviders()
server.startProviders()
go server.listenSignals()
var er error
server.serverLock.Lock()
server.srv, er = server.prepareServer(server.configurationRouter, server.globalConfiguration, nil, server.loggerMiddleware, metrics)
if er != nil {
log.Fatal("Error preparing server: ", er)
}
go server.startServer(server.srv, server.globalConfiguration)
//TODO change that!
time.Sleep(100 * time.Millisecond)
server.serverLock.Unlock()
<-server.stopChan
}
// Stop stops the server
func (server *Server) Stop() {
server.srv.Close()
server.stopChan <- true
}
// Close destroys the server
func (server *Server) Close() {
defer close(server.configurationChan)
defer close(server.configurationChanValidated)
defer close(server.sigs)
defer close(server.stopChan)
defer server.loggerMiddleware.Close()
}
func (server *Server) listenProviders() {
lastReceivedConfiguration := time.Unix(0, 0)
lastConfigs := make(map[string]*types.ConfigMessage)
for {
configMsg := <-server.configurationChan
log.Infof("Configuration receveived from provider %s: %#v", configMsg.ProviderName, configMsg.Configuration)
lastConfigs[configMsg.ProviderName] = &configMsg
if time.Now().After(lastReceivedConfiguration.Add(time.Duration(server.globalConfiguration.ProvidersThrottleDuration))) {
log.Infof("Last %s config received more than %s, OK", configMsg.ProviderName, server.globalConfiguration.ProvidersThrottleDuration)
// last config received more than n s ago
server.configurationChanValidated <- configMsg
} else {
log.Infof("Last %s config received less than %s, waiting...", configMsg.ProviderName, server.globalConfiguration.ProvidersThrottleDuration)
go func() {
<-time.After(server.globalConfiguration.ProvidersThrottleDuration)
if time.Now().After(lastReceivedConfiguration.Add(time.Duration(server.globalConfiguration.ProvidersThrottleDuration))) {
log.Infof("Waited for %s config, OK", configMsg.ProviderName)
server.configurationChanValidated <- *lastConfigs[configMsg.ProviderName]
}
}()
}
lastReceivedConfiguration = time.Now()
}
}
func (server *Server) enableRouter() {
for {
configMsg := <-server.configurationChanValidated
if configMsg.Configuration == nil {
log.Info("Skipping empty Configuration")
} else if reflect.DeepEqual(server.currentConfigurations[configMsg.ProviderName], configMsg.Configuration) {
log.Info("Skipping same configuration")
} else {
// Copy configurations to new map so we don't change current if LoadConfig fails
newConfigurations := make(configs)
for k, v := range server.currentConfigurations {
newConfigurations[k] = v
}
newConfigurations[configMsg.ProviderName] = configMsg.Configuration
newConfigurationRouter, err := server.loadConfig(newConfigurations, server.globalConfiguration)
if err == nil {
server.serverLock.Lock()
server.currentConfigurations = newConfigurations
server.configurationRouter = newConfigurationRouter
oldServer := server.srv
newsrv, err := server.prepareServer(server.configurationRouter, server.globalConfiguration, oldServer, server.loggerMiddleware, metrics)
if err != nil {
log.Fatal("Error preparing server: ", err)
}
go server.startServer(newsrv, server.globalConfiguration)
server.srv = newsrv
time.Sleep(1 * time.Second)
if oldServer != nil {
log.Info("Stopping old server")
oldServer.Close()
}
server.serverLock.Unlock()
} else {
log.Error("Error loading new configuration, aborted ", err)
}
}
}
}
func (server *Server) configureProviders() {
// configure providers
if server.globalConfiguration.Docker != nil {
server.providers = append(server.providers, server.globalConfiguration.Docker)
}
if server.globalConfiguration.Marathon != nil {
server.providers = append(server.providers, server.globalConfiguration.Marathon)
}
if server.globalConfiguration.File != nil {
if len(server.globalConfiguration.File.Filename) == 0 {
// no filename, setting to global config file
server.globalConfiguration.File.Filename = *globalConfigFile
}
server.providers = append(server.providers, server.globalConfiguration.File)
}
if server.globalConfiguration.Web != nil {
server.globalConfiguration.Web.server = server
server.providers = append(server.providers, server.globalConfiguration.Web)
}
if server.globalConfiguration.Consul != nil {
server.providers = append(server.providers, server.globalConfiguration.Consul)
}
if server.globalConfiguration.Etcd != nil {
server.providers = append(server.providers, server.globalConfiguration.Etcd)
}
if server.globalConfiguration.Zookeeper != nil {
server.providers = append(server.providers, server.globalConfiguration.Zookeeper)
}
if server.globalConfiguration.Boltdb != nil {
server.providers = append(server.providers, server.globalConfiguration.Boltdb)
}
}
func (server *Server) startProviders() {
// start providers
for _, provider := range server.providers {
log.Infof("Starting provider %v %+v", reflect.TypeOf(provider), provider)
currentProvider := provider
go func() {
err := currentProvider.Provide(server.configurationChan)
if err != nil {
log.Errorf("Error starting provider %s", err)
}
}()
}
}
func (server *Server) listenSignals() {
sig := <-server.sigs
log.Infof("I have to go... %+v", sig)
log.Info("Stopping server")
server.Stop()
}
// creates a TLS config that allows terminating HTTPS for multiple domains using SNI
func (server *Server) createTLSConfig(certs []Certificate) (*tls.Config, error) {
if len(certs) == 0 {
return nil, nil
}
config := &tls.Config{}
if config.NextProtos == nil {
config.NextProtos = []string{"http/1.1"}
}
var err error
config.Certificates = make([]tls.Certificate, len(certs))
for i, v := range certs {
config.Certificates[i], err = tls.LoadX509KeyPair(v.CertFile, v.KeyFile)
if err != nil {
return nil, err
}
}
// BuildNameToCertificate parses the CommonName and SubjectAlternateName fields
// in each certificate and populates the config.NameToCertificate map.
config.BuildNameToCertificate()
return config, nil
}
func (server *Server) startServer(srv *manners.GracefulServer, globalConfiguration GlobalConfiguration) {
log.Info("Starting server")
if srv.TLSConfig != nil {
err := srv.ListenAndServeTLSWithConfig(srv.TLSConfig)
if err != nil {
log.Fatal("Error creating server: ", err)
}
} else {
err := srv.ListenAndServe()
if err != nil {
log.Fatal("Error creating server: ", err)
}
}
log.Info("Server stopped")
}
func (server *Server) prepareServer(router *mux.Router, globalConfiguration GlobalConfiguration, oldServer *manners.GracefulServer, middlewares ...negroni.Handler) (*manners.GracefulServer, error) {
log.Info("Preparing server")
// middlewares
var negroni = negroni.New()
for _, middleware := range middlewares {
negroni.Use(middleware)
}
negroni.UseHandler(router)
tlsConfig, err := server.createTLSConfig(globalConfiguration.Certificates)
if err != nil {
log.Fatalf("Error creating TLS config %s", err)
return nil, err
}
if oldServer == nil {
return manners.NewWithServer(
&http.Server{
Addr: globalConfiguration.Port,
Handler: negroni,
TLSConfig: tlsConfig,
}), nil
}
gracefulServer, err := oldServer.HijackListener(&http.Server{
Addr: globalConfiguration.Port,
Handler: negroni,
TLSConfig: tlsConfig,
}, tlsConfig)
if err != nil {
log.Fatalf("Error hijacking server %s", err)
return nil, err
}
return gracefulServer, 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) (*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
}

View file

@ -1,38 +1,22 @@
package main
import (
"crypto/tls"
"errors"
fmtlog "log"
"net/http"
"net/url"
"os"
"os/signal"
"reflect"
"runtime"
"strings"
"syscall"
"time"
log "github.com/Sirupsen/logrus"
"github.com/codegangsta/negroni"
"github.com/emilevauge/traefik/middlewares"
"github.com/emilevauge/traefik/provider"
"github.com/emilevauge/traefik/types"
"github.com/gorilla/mux"
"github.com/mailgun/manners"
"github.com/mailgun/oxy/cbreaker"
"github.com/mailgun/oxy/forward"
"github.com/mailgun/oxy/roundrobin"
"github.com/thoas/stats"
"gopkg.in/alecthomas/kingpin.v2"
"sync"
)
var (
globalConfigFile = kingpin.Arg("conf", "Main configration file.").Default("traefik.toml").String()
version = kingpin.Flag("version", "Get Version.").Short('v').Bool()
currentConfigurations = make(configs)
metrics = stats.New()
oxyLogger = &OxyLogger{}
)
@ -42,19 +26,6 @@ func main() {
kingpin.Version(Version + " built on the " + BuildDate)
kingpin.Parse()
fmtlog.SetFlags(fmtlog.Lshortfile | fmtlog.LstdFlags)
var srv *manners.GracefulServer
var configurationRouter *mux.Router
var configurationChan = make(chan types.ConfigMessage, 10)
defer close(configurationChan)
var configurationChanValidated = make(chan types.ConfigMessage, 10)
defer close(configurationChanValidated)
var sigs = make(chan os.Signal, 1)
defer close(sigs)
var stopChan = make(chan bool)
defer close(stopChan)
var providers = []provider.Provider{}
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
var serverLock sync.Mutex
// load global configuration
globalConfiguration := LoadFileConfig(*globalConfigFile)
@ -82,294 +53,12 @@ func main() {
log.SetFormatter(&log.TextFormatter{FullTimestamp: true, DisableSorting: true})
}
log.Debugf("Global configuration loaded %+v", globalConfiguration)
configurationRouter = LoadDefaultConfig(globalConfiguration)
// listen new configurations from providers
go func() {
lastReceivedConfiguration := time.Unix(0, 0)
lastConfigs := make(map[string]*types.ConfigMessage)
for {
configMsg := <-configurationChan
log.Infof("Configuration receveived from provider %s: %#v", configMsg.ProviderName, configMsg.Configuration)
lastConfigs[configMsg.ProviderName] = &configMsg
if time.Now().After(lastReceivedConfiguration.Add(time.Duration(globalConfiguration.ProvidersThrottleDuration))) {
log.Infof("Last %s config received more than %s, OK", configMsg.ProviderName, globalConfiguration.ProvidersThrottleDuration)
// last config received more than n s ago
configurationChanValidated <- configMsg
} else {
log.Infof("Last %s config received less than %s, waiting...", configMsg.ProviderName, globalConfiguration.ProvidersThrottleDuration)
go func() {
<-time.After(globalConfiguration.ProvidersThrottleDuration)
if time.Now().After(lastReceivedConfiguration.Add(time.Duration(globalConfiguration.ProvidersThrottleDuration))) {
log.Infof("Waited for %s config, OK", configMsg.ProviderName)
configurationChanValidated <- *lastConfigs[configMsg.ProviderName]
}
}()
}
lastReceivedConfiguration = time.Now()
}
}()
go func() {
for {
configMsg := <-configurationChanValidated
if configMsg.Configuration == nil {
log.Info("Skipping empty Configuration")
} else if reflect.DeepEqual(currentConfigurations[configMsg.ProviderName], configMsg.Configuration) {
log.Info("Skipping same configuration")
} else {
// Copy configurations to new map so we don't change current if LoadConfig fails
newConfigurations := make(configs)
for k, v := range currentConfigurations {
newConfigurations[k] = v
}
newConfigurations[configMsg.ProviderName] = configMsg.Configuration
newConfigurationRouter, err := LoadConfig(newConfigurations, globalConfiguration)
if err == nil {
serverLock.Lock()
currentConfigurations = newConfigurations
configurationRouter = newConfigurationRouter
oldServer := srv
newsrv, err := prepareServer(configurationRouter, globalConfiguration, oldServer, loggerMiddleware, metrics)
if err != nil {
log.Fatal("Error preparing server: ", err)
}
go startServer(newsrv, globalConfiguration)
srv = newsrv
time.Sleep(1 * time.Second)
if oldServer != nil {
log.Info("Stopping old server")
oldServer.Close()
}
serverLock.Unlock()
} else {
log.Error("Error loading new configuration, aborted ", err)
}
}
}
}()
// configure providers
if globalConfiguration.Docker != nil {
providers = append(providers, globalConfiguration.Docker)
}
if globalConfiguration.Marathon != nil {
providers = append(providers, globalConfiguration.Marathon)
}
if globalConfiguration.File != nil {
if len(globalConfiguration.File.Filename) == 0 {
// no filename, setting to global config file
globalConfiguration.File.Filename = *globalConfigFile
}
providers = append(providers, globalConfiguration.File)
}
if globalConfiguration.Web != nil {
providers = append(providers, globalConfiguration.Web)
}
if globalConfiguration.Consul != nil {
providers = append(providers, globalConfiguration.Consul)
}
if globalConfiguration.Etcd != nil {
providers = append(providers, globalConfiguration.Etcd)
}
if globalConfiguration.Zookeeper != nil {
providers = append(providers, globalConfiguration.Zookeeper)
}
if globalConfiguration.Boltdb != nil {
providers = append(providers, globalConfiguration.Boltdb)
}
// start providers
for _, provider := range providers {
log.Infof("Starting provider %v %+v", reflect.TypeOf(provider), provider)
currentProvider := provider
go func() {
err := currentProvider.Provide(configurationChan)
if err != nil {
log.Errorf("Error starting provider %s", err)
}
}()
}
go func() {
sig := <-sigs
log.Infof("I have to go... %+v", sig)
log.Info("Stopping server")
srv.Close()
stopChan <- true
}()
//negroni.Use(middlewares.NewCircuitBreaker(oxyLogger))
//negroni.Use(middlewares.NewRoutes(configurationRouter))
var er error
serverLock.Lock()
srv, er = prepareServer(configurationRouter, globalConfiguration, nil, loggerMiddleware, metrics)
if er != nil {
log.Fatal("Error preparing server: ", er)
}
go startServer(srv, globalConfiguration)
//TODO change that!
time.Sleep(100 * time.Millisecond)
serverLock.Unlock()
<-stopChan
server := NewServer(*globalConfiguration)
server.Start()
server.Close()
log.Info("Shutting down")
}
// creates a TLS config that allows terminating HTTPS for multiple domains using SNI
func createTLSConfig(certs []Certificate) (*tls.Config, error) {
if len(certs) == 0 {
return nil, nil
}
config := &tls.Config{}
if config.NextProtos == nil {
config.NextProtos = []string{"http/1.1"}
}
var err error
config.Certificates = make([]tls.Certificate, len(certs))
for i, v := range certs {
config.Certificates[i], err = tls.LoadX509KeyPair(v.CertFile, v.KeyFile)
if err != nil {
return nil, err
}
}
// BuildNameToCertificate parses the CommonName and SubjectAlternateName fields
// in each certificate and populates the config.NameToCertificate map.
config.BuildNameToCertificate()
return config, nil
}
func startServer(srv *manners.GracefulServer, globalConfiguration *GlobalConfiguration) {
log.Info("Starting server")
if srv.TLSConfig != nil {
err := srv.ListenAndServeTLSWithConfig(srv.TLSConfig)
if err != nil {
log.Fatal("Error creating server: ", err)
}
} else {
err := srv.ListenAndServe()
if err != nil {
log.Fatal("Error creating server: ", err)
}
}
log.Info("Server stopped")
}
func prepareServer(router *mux.Router, globalConfiguration *GlobalConfiguration, oldServer *manners.GracefulServer, middlewares ...negroni.Handler) (*manners.GracefulServer, error) {
log.Info("Preparing server")
// middlewares
var negroni = negroni.New()
for _, middleware := range middlewares {
negroni.Use(middleware)
}
negroni.UseHandler(router)
tlsConfig, err := createTLSConfig(globalConfiguration.Certificates)
if err != nil {
log.Fatalf("Error creating TLS config %s", err)
return nil, err
}
if oldServer == nil {
return manners.NewWithServer(
&http.Server{
Addr: globalConfiguration.Port,
Handler: negroni,
TLSConfig: tlsConfig,
}), nil
}
server, err := oldServer.HijackListener(&http.Server{
Addr: globalConfiguration.Port,
Handler: negroni,
TLSConfig: tlsConfig,
}, tlsConfig)
if err != nil {
log.Fatalf("Error hijacking server %s", err)
return nil, err
}
return server, nil
}
// 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
}
// Invoke calls the specified method with the specified arguments on the specified interface.
// It uses the go(lang) reflect package.
func invoke(any interface{}, name string, args ...interface{}) ([]reflect.Value, error) {

69
web.go
View file

@ -20,6 +20,7 @@ type WebProvider struct {
Address string
CertFile, KeyFile string
ReadOnly bool
server *Server
}
var (
@ -34,12 +35,12 @@ func (provider *WebProvider) Provide(configurationChan chan<- types.ConfigMessag
systemRouter := mux.NewRouter()
// health route
systemRouter.Methods("GET").Path("/health").HandlerFunc(getHealthHandler)
systemRouter.Methods("GET").Path("/health").HandlerFunc(provider.getHealthHandler)
// API routes
systemRouter.Methods("GET").Path("/api").HandlerFunc(getConfigHandler)
systemRouter.Methods("GET").Path("/api/providers").HandlerFunc(getConfigHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}").HandlerFunc(getProviderHandler)
systemRouter.Methods("GET").Path("/api").HandlerFunc(provider.getConfigHandler)
systemRouter.Methods("GET").Path("/api/providers").HandlerFunc(provider.getConfigHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}").HandlerFunc(provider.getProviderHandler)
systemRouter.Methods("PUT").Path("/api/providers/{provider}").HandlerFunc(func(response http.ResponseWriter, request *http.Request) {
if provider.ReadOnly {
response.WriteHeader(http.StatusForbidden)
@ -58,20 +59,20 @@ func (provider *WebProvider) Provide(configurationChan chan<- types.ConfigMessag
err := json.Unmarshal(body, configuration)
if err == nil {
configurationChan <- types.ConfigMessage{"web", configuration}
getConfigHandler(response, request)
provider.getConfigHandler(response, request)
} else {
log.Errorf("Error parsing configuration %+v", err)
http.Error(response, fmt.Sprintf("%+v", err), http.StatusBadRequest)
}
})
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends").HandlerFunc(getBackendsHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}").HandlerFunc(getBackendHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers").HandlerFunc(getServersHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers/{server}").HandlerFunc(getServerHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends").HandlerFunc(getFrontendsHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}").HandlerFunc(getFrontendHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes").HandlerFunc(getRoutesHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes/{route}").HandlerFunc(getRouteHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends").HandlerFunc(provider.getBackendsHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}").HandlerFunc(provider.getBackendHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers").HandlerFunc(provider.getServersHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/backends/{backend}/servers/{server}").HandlerFunc(provider.getServerHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends").HandlerFunc(provider.getFrontendsHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}").HandlerFunc(provider.getFrontendHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes").HandlerFunc(provider.getRoutesHandler)
systemRouter.Methods("GET").Path("/api/providers/{provider}/frontends/{frontend}/routes/{route}").HandlerFunc(provider.getRouteHandler)
// Expose dashboard
systemRouter.Methods("GET").Path("/").HandlerFunc(func(response http.ResponseWriter, request *http.Request) {
@ -95,39 +96,39 @@ func (provider *WebProvider) Provide(configurationChan chan<- types.ConfigMessag
return nil
}
func getHealthHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getHealthHandler(response http.ResponseWriter, request *http.Request) {
templatesRenderer.JSON(response, http.StatusOK, metrics.Data())
}
func getConfigHandler(response http.ResponseWriter, request *http.Request) {
templatesRenderer.JSON(response, http.StatusOK, currentConfigurations)
func (provider *WebProvider) getConfigHandler(response http.ResponseWriter, request *http.Request) {
templatesRenderer.JSON(response, http.StatusOK, provider.server.currentConfigurations)
}
func getProviderHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getProviderHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
templatesRenderer.JSON(response, http.StatusOK, provider)
} else {
http.NotFound(response, request)
}
}
func getBackendsHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getBackendsHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
templatesRenderer.JSON(response, http.StatusOK, provider.Backends)
} else {
http.NotFound(response, request)
}
}
func getBackendHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getBackendHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
backendID := vars["backend"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
if backend, ok := provider.Backends[backendID]; ok {
templatesRenderer.JSON(response, http.StatusOK, backend)
return
@ -136,11 +137,11 @@ func getBackendHandler(response http.ResponseWriter, request *http.Request) {
http.NotFound(response, request)
}
func getServersHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getServersHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
backendID := vars["backend"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
if backend, ok := provider.Backends[backendID]; ok {
templatesRenderer.JSON(response, http.StatusOK, backend.Servers)
return
@ -149,12 +150,12 @@ func getServersHandler(response http.ResponseWriter, request *http.Request) {
http.NotFound(response, request)
}
func getServerHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getServerHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
backendID := vars["backend"]
serverID := vars["server"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
if backend, ok := provider.Backends[backendID]; ok {
if server, ok := backend.Servers[serverID]; ok {
templatesRenderer.JSON(response, http.StatusOK, server)
@ -165,21 +166,21 @@ func getServerHandler(response http.ResponseWriter, request *http.Request) {
http.NotFound(response, request)
}
func getFrontendsHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getFrontendsHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
templatesRenderer.JSON(response, http.StatusOK, provider.Frontends)
} else {
http.NotFound(response, request)
}
}
func getFrontendHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getFrontendHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
frontendID := vars["frontend"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
if frontend, ok := provider.Frontends[frontendID]; ok {
templatesRenderer.JSON(response, http.StatusOK, frontend)
return
@ -188,11 +189,11 @@ func getFrontendHandler(response http.ResponseWriter, request *http.Request) {
http.NotFound(response, request)
}
func getRoutesHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getRoutesHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
frontendID := vars["frontend"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
if frontend, ok := provider.Frontends[frontendID]; ok {
templatesRenderer.JSON(response, http.StatusOK, frontend.Routes)
return
@ -201,12 +202,12 @@ func getRoutesHandler(response http.ResponseWriter, request *http.Request) {
http.NotFound(response, request)
}
func getRouteHandler(response http.ResponseWriter, request *http.Request) {
func (provider *WebProvider) getRouteHandler(response http.ResponseWriter, request *http.Request) {
vars := mux.Vars(request)
providerID := vars["provider"]
frontendID := vars["frontend"]
routeID := vars["route"]
if provider, ok := currentConfigurations[providerID]; ok {
if provider, ok := provider.server.currentConfigurations[providerID]; ok {
if frontend, ok := provider.Frontends[frontendID]; ok {
if route, ok := frontend.Routes[routeID]; ok {
templatesRenderer.JSON(response, http.StatusOK, route)