74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
package xenserver
|
|
|
|
import (
|
|
"github.com/mitchellh/multistep"
|
|
"github.com/mitchellh/packer/packer"
|
|
"log"
|
|
"net"
|
|
"fmt"
|
|
)
|
|
|
|
type stepForwardPortOverSSH struct {
|
|
|
|
RemotePort func (state multistep.StateBag) (uint, error)
|
|
RemoteDest func (state multistep.StateBag) (string, error)
|
|
|
|
HostPortMin uint
|
|
HostPortMax uint
|
|
|
|
ResultKey string
|
|
}
|
|
|
|
|
|
func (self *stepForwardPortOverSSH) Run(state multistep.StateBag) multistep.StepAction {
|
|
|
|
config := state.Get("config").(config)
|
|
ui := state.Get("ui").(packer.Ui)
|
|
|
|
// Find a free local port:
|
|
|
|
log.Printf("Looking for an available port between %d and %d",
|
|
self.HostPortMin,
|
|
self.HostPortMax)
|
|
|
|
|
|
var sshHostPort uint
|
|
var foundPort bool
|
|
|
|
foundPort = false
|
|
|
|
for i := self.HostPortMin; i < self.HostPortMax; i++ {
|
|
sshHostPort = i
|
|
log.Printf("Trying port: %d", sshHostPort)
|
|
l, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%d", sshHostPort))
|
|
if err == nil {
|
|
l.Close()
|
|
foundPort = true
|
|
break
|
|
}
|
|
|
|
}
|
|
|
|
if !foundPort {
|
|
log.Fatal("Error: unable to find free host port. Try providing a larger range")
|
|
return multistep.ActionHalt
|
|
}
|
|
|
|
|
|
ui.Say(fmt.Sprintf("Creating a local port forward over SSH on local port %d", sshHostPort))
|
|
|
|
remotePort, _ := self.RemotePort(state)
|
|
remoteDest, _ := self.RemoteDest(state)
|
|
|
|
|
|
go ssh_port_forward(sshHostPort, remotePort, remoteDest, config.HostIp, config.Username, config.Password)
|
|
ui.Say(fmt.Sprintf("Port forward setup. %d ---> %s:%d on %s", sshHostPort, remoteDest, remotePort, config.HostIp))
|
|
|
|
// Provide the local port to future steps.
|
|
state.Put(self.ResultKey, sshHostPort)
|
|
|
|
return multistep.ActionContinue
|
|
}
|
|
|
|
func (self *stepForwardPortOverSSH) Cleanup(state multistep.StateBag) {}
|