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Add proxy server for Dashboard (#2684)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| // Copyright 2020 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package server | ||
|
|
||
| import ( | ||
| "crypto/tls" | ||
| "crypto/x509" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "net/http" | ||
| "net/http/httputil" | ||
| "net/url" | ||
| "strings" | ||
|
|
||
| "github.com/pingcap/tidb-operator/pkg/manager/member" | ||
| "k8s.io/klog" | ||
| ) | ||
|
|
||
| func buildUrl(tcName string, tlsEnabled bool) (*url.URL, error) { | ||
| url := &url.URL{ | ||
| Host: fmt.Sprintf("%s-pd:2379", tcName), | ||
| Scheme: "http", | ||
| } | ||
|
|
||
| if tlsEnabled { | ||
| url.Scheme = "https" | ||
| } | ||
| return url, nil | ||
| } | ||
|
|
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| func buildProxy(tcName string, tlsEnabled bool) (*httputil.ReverseProxy, error) { | ||
| url, err := buildUrl(tcName, tlsEnabled) | ||
| if err != nil { | ||
| klog.Error(err) | ||
| return nil, err | ||
| } | ||
| proxy := httputil.NewSingleHostReverseProxy(url) | ||
| if tlsEnabled { | ||
| // load crt and key | ||
| certPath := fmt.Sprintf("%s/tls.crt", member.PdTlsCertPath) | ||
| keyPath := fmt.Sprintf("%s/tls.key", member.PdTlsCertPath) | ||
| cert, err := tls.LoadX509KeyPair(certPath, keyPath) | ||
| if err != nil { | ||
| klog.Error(err) | ||
| return nil, err | ||
| } | ||
| // load ca | ||
| rootCAs := x509.NewCertPool() | ||
| caPath := fmt.Sprintf("%s/ca.crt", member.PdTlsCertPath) | ||
| caByte, err := ioutil.ReadFile(caPath) | ||
| if err != nil { | ||
| klog.Error(err) | ||
| return nil, err | ||
| } | ||
| rootCAs.AppendCertsFromPEM(caByte) | ||
| tlsConfig := &tls.Config{ | ||
| Certificates: []tls.Certificate{cert}, | ||
| RootCAs: rootCAs, | ||
| } | ||
| proxy.Transport = &http.Transport{TLSClientConfig: tlsConfig} | ||
| } | ||
| director := proxy.Director | ||
| proxy.Director = func(req *http.Request) { | ||
| if strings.HasPrefix(req.RequestURI, "/dashboard") { | ||
| director(req) | ||
| req.Host = req.URL.Host | ||
| } | ||
| } | ||
| return proxy, nil | ||
| } | ||
|
|
||
| type handler struct { | ||
| tcName string | ||
| namespace string | ||
| tcTlsEnabled bool | ||
| } | ||
|
|
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| func NewHandler(tcName string, tcTlsEnabled bool) *handler { | ||
| return &handler{ | ||
| tcName: tcName, | ||
| tcTlsEnabled: tcTlsEnabled, | ||
| } | ||
| } | ||
|
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| func (handler *handler) ServeHTTP(w http.ResponseWriter, req *http.Request) { | ||
| proxy, err := buildProxy(handler.tcName, handler.tcTlsEnabled) | ||
| if err != nil { | ||
| msg := fmt.Sprintf("Error Happed, err:%v", err) | ||
| w.Write([]byte(msg)) | ||
| return | ||
| } | ||
| proxy.ServeHTTP(w, req) | ||
| } | ||
|
|
||
| func StartProxyServer(tcName string, tcTlsEnabled bool, port int) { | ||
| handler := NewHandler(tcName, tcTlsEnabled) | ||
| klog.Infof("start proxy-server") | ||
| klog.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", port), handler)) | ||
| } |
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