mirror of
https://github.com/prometheus-operator/prometheus-operator.git
synced 2025-04-16 09:16:38 +00:00
138 lines
3.2 KiB
Go
138 lines
3.2 KiB
Go
// Copyright 2019 The prometheus-operator Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"crypto/tls"
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"crypto/x509"
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"encoding/base64"
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"flag"
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"fmt"
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"log"
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"net/http"
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"os"
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"path"
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"strings"
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"time"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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var (
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certPath = flag.String("cert-path", "", "path to tls certificates for mutual TLS endpoint")
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)
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func main() {
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flag.Parse()
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if *certPath != "" {
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go func() {
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log.Fatal(mTLSEndpoint())
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}()
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}
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http.HandleFunc("/", handler)
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http.HandleFunc("/metrics", func(w http.ResponseWriter, r *http.Request) {
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if checkBasicAuth(w, r) {
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promhttp.Handler().ServeHTTP(w, r)
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return
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}
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w.Header().Set("WWW-Authenticate", `Basic realm="MY REALM"`)
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w.WriteHeader(401)
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w.Write([]byte("401 Unauthorized\n"))
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})
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http.HandleFunc("/bearer-metrics", func(w http.ResponseWriter, r *http.Request) {
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if checkBearerAuth(w, r) {
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promhttp.Handler().ServeHTTP(w, r)
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return
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}
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w.Header().Set("WWW-Authenticate", `Bearer realm="MY REALM"`)
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w.WriteHeader(401)
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w.Write([]byte("401 Unauthorized\n"))
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})
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address := ":8080"
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fmt.Printf("listening for metric requests on '%v' protected via basic auth or bearer token\n", address)
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_ = http.ListenAndServe(address, nil)
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}
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func handler(w http.ResponseWriter, r *http.Request) {
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fmt.Fprint(w, time.Now().String())
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fmt.Fprint(w, "\nAppVersion: "+os.Getenv("VERSION"))
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}
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func checkBasicAuth(w http.ResponseWriter, r *http.Request) bool {
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s := strings.SplitN(r.Header.Get("Authorization"), " ", 2)
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if len(s) != 2 {
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return false
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}
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b, err := base64.StdEncoding.DecodeString(s[1])
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if err != nil {
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return false
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}
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pair := strings.SplitN(string(b), ":", 2)
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if len(pair) != 2 {
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return false
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}
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return pair[0] == "user" && pair[1] == "pass"
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}
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func checkBearerAuth(w http.ResponseWriter, r *http.Request) bool {
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s := strings.SplitN(r.Header.Get("Authorization"), " ", 2)
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if len(s) != 2 {
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return false
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}
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fmt.Println(s[1])
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return s[1] == "abc"
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}
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func mTLSEndpoint() error {
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certPool := x509.NewCertPool()
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pem, err := os.ReadFile(path.Join(*certPath, "cert.pem"))
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if err != nil {
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return fmt.Errorf("failed to load certificate authority")
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}
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ok := certPool.AppendCertsFromPEM(pem)
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if !ok {
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return fmt.Errorf("failed to add certificate authority to certificate pool")
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}
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tlsConfig := &tls.Config{
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ClientCAs: certPool,
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ClientAuth: tls.RequireAndVerifyClientCert,
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}
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address := ":8081"
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server := &http.Server{
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Addr: address,
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TLSConfig: tlsConfig,
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Handler: promhttp.Handler(),
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}
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fmt.Printf("listening for metric requests on '%v' protected via mutual tls\n", address)
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return server.ListenAndServeTLS(path.Join(*certPath, "cert.pem"), path.Join(*certPath, "key.pem"))
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}
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