mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-25 06:17:36 +01:00
106 lines
3.3 KiB
Go
106 lines
3.3 KiB
Go
package main
|
|
|
|
import (
|
|
"flag"
|
|
"net/http"
|
|
"net/http/httputil"
|
|
"net/url"
|
|
"os"
|
|
"time"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/buildinfo"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/envflag"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/procutil"
|
|
)
|
|
|
|
var (
|
|
httpListenAddr = flag.String("httpListenAddr", ":8427", "TCP address to listen for http connections")
|
|
)
|
|
|
|
func main() {
|
|
// Write flags and help message to stdout, since it is easier to grep or pipe.
|
|
flag.CommandLine.SetOutput(os.Stdout)
|
|
flag.Usage = usage
|
|
envflag.Parse()
|
|
buildinfo.Init()
|
|
logger.Init()
|
|
logger.Infof("starting vmauth at %q...", *httpListenAddr)
|
|
startTime := time.Now()
|
|
initAuthConfig()
|
|
go httpserver.Serve(*httpListenAddr, requestHandler)
|
|
logger.Infof("started vmauth in %.3f seconds", time.Since(startTime).Seconds())
|
|
|
|
sig := procutil.WaitForSigterm()
|
|
logger.Infof("received signal %s", sig)
|
|
|
|
startTime = time.Now()
|
|
logger.Infof("gracefully shutting down webservice at %q", *httpListenAddr)
|
|
if err := httpserver.Stop(*httpListenAddr); err != nil {
|
|
logger.Fatalf("cannot stop the webservice: %s", err)
|
|
}
|
|
logger.Infof("successfully shut down the webservice in %.3f seconds", time.Since(startTime).Seconds())
|
|
stopAuthConfig()
|
|
logger.Infof("successfully stopped vmauth in %.3f seconds", time.Since(startTime).Seconds())
|
|
}
|
|
|
|
func requestHandler(w http.ResponseWriter, r *http.Request) bool {
|
|
username, password, ok := r.BasicAuth()
|
|
if !ok {
|
|
w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
|
|
http.Error(w, "missing `Authorization: Basic *` header", http.StatusUnauthorized)
|
|
return true
|
|
}
|
|
ac := authConfig.Load().(map[string]*UserInfo)
|
|
ui := ac[username]
|
|
if ui == nil || ui.Password != password {
|
|
httpserver.Errorf(w, r, "cannot find the provided username %q or password in config", username)
|
|
return true
|
|
}
|
|
ui.requests.Inc()
|
|
targetURL, err := createTargetURL(ui, r.URL)
|
|
if err != nil {
|
|
httpserver.Errorf(w, r, "cannot determine targetURL: %s", err)
|
|
return true
|
|
}
|
|
if _, err := url.Parse(targetURL); err != nil {
|
|
httpserver.Errorf(w, r, "invalid targetURL=%q: %s", targetURL, err)
|
|
return true
|
|
}
|
|
r.Header.Set("vm-target-url", targetURL)
|
|
reverseProxy.ServeHTTP(w, r)
|
|
return true
|
|
}
|
|
|
|
var reverseProxy = &httputil.ReverseProxy{
|
|
Director: func(r *http.Request) {
|
|
targetURL := r.Header.Get("vm-target-url")
|
|
target, err := url.Parse(targetURL)
|
|
if err != nil {
|
|
logger.Panicf("BUG: unexpected error when parsing targetURL=%q: %s", targetURL, err)
|
|
}
|
|
r.URL = target
|
|
},
|
|
Transport: func() *http.Transport {
|
|
tr := http.DefaultTransport.(*http.Transport).Clone()
|
|
// Automatic compression must be disabled in order to fix https://github.com/VictoriaMetrics/VictoriaMetrics/issues/535
|
|
tr.DisableCompression = true
|
|
// Disable HTTP/2.0, since VictoriaMetrics components don't support HTTP/2.0 (because there is no sense in this).
|
|
tr.ForceAttemptHTTP2 = false
|
|
return tr
|
|
}(),
|
|
FlushInterval: time.Second,
|
|
ErrorLog: logger.StdErrorLogger(),
|
|
}
|
|
|
|
func usage() {
|
|
const s = `
|
|
vmauth authenticates and authorizes incoming requests and proxies them to VictoriaMetrics.
|
|
|
|
See the docs at https://victoriametrics.github.io/vmauth.html .
|
|
`
|
|
flagutil.Usage(s)
|
|
}
|