- log & error: remove format if not necessary, add if necessary. - add constants for k8s annotations. - fix typos
333 lines
12 KiB
Go
333 lines
12 KiB
Go
package server
|
|
|
|
import (
|
|
"encoding/json"
|
|
"expvar"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"runtime"
|
|
|
|
"github.com/codegangsta/negroni"
|
|
"github.com/containous/mux"
|
|
"github.com/containous/traefik/autogen"
|
|
"github.com/containous/traefik/log"
|
|
"github.com/containous/traefik/middlewares"
|
|
"github.com/containous/traefik/safe"
|
|
"github.com/containous/traefik/types"
|
|
"github.com/containous/traefik/version"
|
|
"github.com/elazarl/go-bindata-assetfs"
|
|
"github.com/prometheus/client_golang/prometheus/promhttp"
|
|
thoas_stats "github.com/thoas/stats"
|
|
"github.com/unrolled/render"
|
|
)
|
|
|
|
var (
|
|
metrics = thoas_stats.New()
|
|
statsRecorder *middlewares.StatsRecorder
|
|
)
|
|
|
|
// WebProvider is a provider.Provider implementation that provides the UI.
|
|
// FIXME to be handled another way.
|
|
type WebProvider struct {
|
|
Address string `description:"Web administration port"`
|
|
CertFile string `description:"SSL certificate"`
|
|
KeyFile string `description:"SSL certificate"`
|
|
ReadOnly bool `description:"Enable read only API"`
|
|
Statistics *types.Statistics `description:"Enable more detailed statistics"`
|
|
Metrics *types.Metrics `description:"Enable a metrics exporter"`
|
|
Path string `description:"Root path for dashboard and API"`
|
|
server *Server
|
|
Auth *types.Auth
|
|
}
|
|
|
|
var (
|
|
templatesRenderer = render.New(render.Options{
|
|
Directory: "nowhere",
|
|
})
|
|
)
|
|
|
|
func init() {
|
|
expvar.Publish("Goroutines", expvar.Func(goroutines))
|
|
}
|
|
|
|
func goroutines() interface{} {
|
|
return runtime.NumGoroutine()
|
|
}
|
|
|
|
// Provide allows the provider to provide configurations to traefik
|
|
// using the given configuration channel.
|
|
func (provider *WebProvider) Provide(configurationChan chan<- types.ConfigMessage, pool *safe.Pool, _ types.Constraints) error {
|
|
|
|
systemRouter := mux.NewRouter()
|
|
|
|
if provider.Path == "" {
|
|
provider.Path = "/"
|
|
}
|
|
|
|
if provider.Path != "/" {
|
|
if provider.Path[len(provider.Path)-1:] != "/" {
|
|
provider.Path += "/"
|
|
}
|
|
systemRouter.Methods("GET").Path("/").HandlerFunc(func(response http.ResponseWriter, request *http.Request) {
|
|
http.Redirect(response, request, provider.Path, 302)
|
|
})
|
|
}
|
|
|
|
// Prometheus route
|
|
if provider.Metrics != nil && provider.Metrics.Prometheus != nil {
|
|
systemRouter.Methods("GET").Path(provider.Path + "metrics").Handler(promhttp.Handler())
|
|
}
|
|
|
|
// health route
|
|
systemRouter.Methods("GET").Path(provider.Path + "health").HandlerFunc(provider.getHealthHandler)
|
|
|
|
// ping route
|
|
systemRouter.Methods("GET").Path(provider.Path + "ping").HandlerFunc(provider.getPingHandler)
|
|
// API routes
|
|
systemRouter.Methods("GET").Path(provider.Path + "api").HandlerFunc(provider.getConfigHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/version").HandlerFunc(provider.getVersionHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers").HandlerFunc(provider.getConfigHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers/{provider}").HandlerFunc(provider.getProviderHandler)
|
|
systemRouter.Methods("PUT").Path(provider.Path + "api/providers/{provider}").HandlerFunc(func(response http.ResponseWriter, request *http.Request) {
|
|
if provider.ReadOnly {
|
|
response.WriteHeader(http.StatusForbidden)
|
|
fmt.Fprint(response, "REST API is in read-only mode")
|
|
return
|
|
}
|
|
vars := mux.Vars(request)
|
|
if vars["provider"] != "web" {
|
|
response.WriteHeader(http.StatusBadRequest)
|
|
fmt.Fprint(response, "Only 'web' provider can be updated through the REST API")
|
|
return
|
|
}
|
|
|
|
configuration := new(types.Configuration)
|
|
body, _ := ioutil.ReadAll(request.Body)
|
|
err := json.Unmarshal(body, configuration)
|
|
if err == nil {
|
|
configurationChan <- types.ConfigMessage{ProviderName: "web", Configuration: configuration}
|
|
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(provider.Path + "api/providers/{provider}/backends").HandlerFunc(provider.getBackendsHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers/{provider}/backends/{backend}").HandlerFunc(provider.getBackendHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers/{provider}/backends/{backend}/servers").HandlerFunc(provider.getServersHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers/{provider}/backends/{backend}/servers/{server}").HandlerFunc(provider.getServerHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers/{provider}/frontends").HandlerFunc(provider.getFrontendsHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers/{provider}/frontends/{frontend}").HandlerFunc(provider.getFrontendHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers/{provider}/frontends/{frontend}/routes").HandlerFunc(provider.getRoutesHandler)
|
|
systemRouter.Methods("GET").Path(provider.Path + "api/providers/{provider}/frontends/{frontend}/routes/{route}").HandlerFunc(provider.getRouteHandler)
|
|
|
|
// Expose dashboard
|
|
systemRouter.Methods("GET").Path(provider.Path).HandlerFunc(func(response http.ResponseWriter, request *http.Request) {
|
|
http.Redirect(response, request, provider.Path+"dashboard/", 302)
|
|
})
|
|
systemRouter.Methods("GET").PathPrefix(provider.Path + "dashboard/").
|
|
Handler(http.StripPrefix(provider.Path+"dashboard/", http.FileServer(&assetfs.AssetFS{Asset: autogen.Asset, AssetInfo: autogen.AssetInfo, AssetDir: autogen.AssetDir, Prefix: "static"})))
|
|
|
|
// expvars
|
|
if provider.server.globalConfiguration.Debug {
|
|
systemRouter.Methods("GET").Path(provider.Path + "debug/vars").HandlerFunc(expvarHandler)
|
|
}
|
|
|
|
go func() {
|
|
var err error
|
|
var negroni = negroni.New()
|
|
if provider.Auth != nil {
|
|
authMiddleware, err := middlewares.NewAuthenticator(provider.Auth)
|
|
if err != nil {
|
|
log.Fatal("Error creating Auth: ", err)
|
|
}
|
|
negroni.Use(authMiddleware)
|
|
}
|
|
negroni.UseHandler(systemRouter)
|
|
|
|
if len(provider.CertFile) > 0 && len(provider.KeyFile) > 0 {
|
|
err = http.ListenAndServeTLS(provider.Address, provider.CertFile, provider.KeyFile, negroni)
|
|
} else {
|
|
err = http.ListenAndServe(provider.Address, negroni)
|
|
}
|
|
|
|
if err != nil {
|
|
log.Fatal("Error creating server: ", err)
|
|
}
|
|
}()
|
|
return nil
|
|
}
|
|
|
|
// healthResponse combines data returned by thoas/stats with statistics (if
|
|
// they are enabled).
|
|
type healthResponse struct {
|
|
*thoas_stats.Data
|
|
*middlewares.Stats
|
|
}
|
|
|
|
func (provider *WebProvider) getHealthHandler(response http.ResponseWriter, request *http.Request) {
|
|
health := &healthResponse{Data: metrics.Data()}
|
|
if statsRecorder != nil {
|
|
health.Stats = statsRecorder.Data()
|
|
}
|
|
templatesRenderer.JSON(response, http.StatusOK, health)
|
|
}
|
|
|
|
func (provider *WebProvider) getPingHandler(response http.ResponseWriter, request *http.Request) {
|
|
fmt.Fprint(response, "OK")
|
|
}
|
|
|
|
func (provider *WebProvider) getConfigHandler(response http.ResponseWriter, request *http.Request) {
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
templatesRenderer.JSON(response, http.StatusOK, currentConfigurations)
|
|
}
|
|
|
|
func (provider *WebProvider) getVersionHandler(response http.ResponseWriter, request *http.Request) {
|
|
v := struct {
|
|
Version string
|
|
Codename string
|
|
}{
|
|
Version: version.Version,
|
|
Codename: version.Codename,
|
|
}
|
|
templatesRenderer.JSON(response, http.StatusOK, v)
|
|
}
|
|
|
|
func (provider *WebProvider) getProviderHandler(response http.ResponseWriter, request *http.Request) {
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, provider)
|
|
} else {
|
|
http.NotFound(response, request)
|
|
}
|
|
}
|
|
|
|
func (provider *WebProvider) getBackendsHandler(response http.ResponseWriter, request *http.Request) {
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, provider.Backends)
|
|
} else {
|
|
http.NotFound(response, request)
|
|
}
|
|
}
|
|
|
|
func (provider *WebProvider) getBackendHandler(response http.ResponseWriter, request *http.Request) {
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
backendID := vars["backend"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
if backend, ok := provider.Backends[backendID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, backend)
|
|
return
|
|
}
|
|
}
|
|
http.NotFound(response, request)
|
|
}
|
|
|
|
func (provider *WebProvider) getServersHandler(response http.ResponseWriter, request *http.Request) {
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
backendID := vars["backend"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
if backend, ok := provider.Backends[backendID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, backend.Servers)
|
|
return
|
|
}
|
|
}
|
|
http.NotFound(response, request)
|
|
}
|
|
|
|
func (provider *WebProvider) getServerHandler(response http.ResponseWriter, request *http.Request) {
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
backendID := vars["backend"]
|
|
serverID := vars["server"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
if backend, ok := provider.Backends[backendID]; ok {
|
|
if server, ok := backend.Servers[serverID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, server)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
http.NotFound(response, request)
|
|
}
|
|
|
|
func (provider *WebProvider) getFrontendsHandler(response http.ResponseWriter, request *http.Request) {
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, provider.Frontends)
|
|
} else {
|
|
http.NotFound(response, request)
|
|
}
|
|
}
|
|
|
|
func (provider *WebProvider) getFrontendHandler(response http.ResponseWriter, request *http.Request) {
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
frontendID := vars["frontend"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
if frontend, ok := provider.Frontends[frontendID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, frontend)
|
|
return
|
|
}
|
|
}
|
|
http.NotFound(response, request)
|
|
}
|
|
|
|
func (provider *WebProvider) getRoutesHandler(response http.ResponseWriter, request *http.Request) {
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
frontendID := vars["frontend"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
if frontend, ok := provider.Frontends[frontendID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, frontend.Routes)
|
|
return
|
|
}
|
|
}
|
|
http.NotFound(response, request)
|
|
}
|
|
|
|
func (provider *WebProvider) getRouteHandler(response http.ResponseWriter, request *http.Request) {
|
|
|
|
vars := mux.Vars(request)
|
|
providerID := vars["provider"]
|
|
frontendID := vars["frontend"]
|
|
routeID := vars["route"]
|
|
currentConfigurations := provider.server.currentConfigurations.Get().(configs)
|
|
if provider, ok := currentConfigurations[providerID]; ok {
|
|
if frontend, ok := provider.Frontends[frontendID]; ok {
|
|
if route, ok := frontend.Routes[routeID]; ok {
|
|
templatesRenderer.JSON(response, http.StatusOK, route)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
http.NotFound(response, request)
|
|
}
|
|
|
|
func expvarHandler(w http.ResponseWriter, r *http.Request) {
|
|
w.Header().Set("Content-Type", "application/json; charset=utf-8")
|
|
fmt.Fprint(w, "{\n")
|
|
first := true
|
|
expvar.Do(func(kv expvar.KeyValue) {
|
|
if !first {
|
|
fmt.Fprint(w, ",\n")
|
|
}
|
|
first = false
|
|
fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
|
|
})
|
|
fmt.Fprint(w, "\n}\n")
|
|
}
|