-
Notifications
You must be signed in to change notification settings - Fork 228
/
inbound.go
67 lines (60 loc) · 1.99 KB
/
inbound.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
package connect
import (
"fmt"
"github.com/alibaba/kt-connect/pkg/common"
"github.com/alibaba/kt-connect/pkg/kt/exec"
"strings"
"sync"
"github.com/alibaba/kt-connect/pkg/kt/exec/sshchannel"
"github.com/alibaba/kt-connect/pkg/kt/util"
"github.com/rs/zerolog/log"
)
// Inbound mapping local port from cluster
func (s *Shadow) Inbound(exposePorts, podName string) (int, error) {
log.Info().Msgf("Forwarding pod %s to local via port %s", podName, exposePorts)
localSSHPort := util.GetRandomSSHPort()
if localSSHPort < 0 {
return -1, fmt.Errorf("failed to find any available local port")
}
// port forward pod 22 -> local <random port>
cli := exec.Cli{}
_, _, err := forwardSSHTunnelToLocal(cli.PortForward(), cli.Kubectl(), s.Options, podName, localSSHPort)
if err != nil {
return -1, err
}
if s.Options.ExchangeOptions.Method != common.ExchangeMethodEphemeral {
// remote forward pod -> local via ssh
s.exposeLocalPorts(exposePorts, localSSHPort)
}
return localSSHPort, nil
}
func (s *Shadow) ExposeLocalPort(wg *sync.WaitGroup, ssh sshchannel.Channel, localPort, remotePort string, localSSHPort int) {
wg.Add(1)
go func(wg *sync.WaitGroup) {
log.Debug().Msgf("Exposing remote pod:%s to local port localhost:%s", remotePort, localPort)
err := ssh.ForwardRemoteToLocal(
&sshchannel.Certificate{
Username: "root",
Password: "root",
},
fmt.Sprintf("127.0.0.1:%d", localSSHPort),
fmt.Sprintf("0.0.0.0:%s", remotePort),
fmt.Sprintf("127.0.0.1:%s", localPort),
)
if err != nil {
log.Error().Err(err).Msgf("Error happen when forward remote request to local")
}
wg.Done()
}(wg)
}
func (s *Shadow) exposeLocalPorts(exposePorts string, localSSHPort int) {
var wg sync.WaitGroup
ssh := sshchannel.SSHChannel{}
// supports multi port pairs
portPairs := strings.Split(exposePorts, ",")
for _, exposePort := range portPairs {
localPort, remotePort := util.ParsePortMapping(exposePort)
s.ExposeLocalPort(&wg, &ssh, localPort, remotePort, localSSHPort)
}
wg.Wait()
}