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port_forward.go
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port_forward.go
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package util
import (
"fmt"
"net/http"
"net/url"
"os"
"strings"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/portforward"
"k8s.io/client-go/transport/spdy"
)
func PodPortForward(config *rest.Config, namespace, podName string, localPort, remotePort int, stopCh <-chan struct{}) error {
readyCh := make(chan struct{})
path := fmt.Sprintf("/api/v1/namespaces/%s/pods/%s/portforward",
namespace, podName)
transport, upgrader, err := spdy.RoundTripperFor(config)
if err != nil {
return err
}
var scheme string
var host string
if strings.HasPrefix(config.Host, "https://") {
scheme = "https"
host = strings.TrimPrefix(config.Host, "https://")
} else {
scheme = "http"
host = strings.TrimPrefix(config.Host, "http://")
}
dialer := spdy.NewDialer(upgrader, &http.Client{Transport: transport}, http.MethodPost, &url.URL{Scheme: scheme, Path: path, Host: host})
fw, err := portforward.New(dialer, []string{fmt.Sprintf("%d:%d", localPort, remotePort)}, stopCh, readyCh, os.Stdout, os.Stderr)
if err != nil {
return err
}
go func() {
if err := fw.ForwardPorts(); err != nil {
panic(err)
}
}()
<-readyCh
return nil
}