126 lines
3.3 KiB
Go
126 lines
3.3 KiB
Go
package common
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import (
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"context"
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"fmt"
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"log"
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"strings"
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"github.com/hashicorp/packer/common/net"
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"github.com/hashicorp/packer/helper/communicator"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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)
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// This step adds a NAT port forwarding definition so that SSH or WinRM is available
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// on the guest machine.
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//
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// Uses:
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// driver Driver
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// ui packer.Ui
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// vmName string
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//
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// Produces:
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type StepPortForwarding struct {
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CommConfig *communicator.Config
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HostPortMin int
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HostPortMax int
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SkipNatMapping bool
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l *net.Listener
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}
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func (s *StepPortForwarding) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packer.Ui)
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vmName := state.Get("vmName").(string)
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if s.CommConfig.Type == "none" {
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log.Printf("Not using a communicator, skipping setting up port forwarding...")
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state.Put("commHostPort", 0)
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return multistep.ActionContinue
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}
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guestPort := s.CommConfig.Port()
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commHostPort := guestPort
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if !s.SkipNatMapping {
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log.Printf("Looking for available communicator (SSH, WinRM, etc) port between %d and %d",
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s.HostPortMin, s.HostPortMax)
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var err error
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s.l, err = net.ListenRangeConfig{
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Addr: "127.0.0.1",
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Min: s.HostPortMin,
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Max: s.HostPortMax,
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Network: "tcp",
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}.Listen(ctx)
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if err != nil {
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err := fmt.Errorf("Error creating port forwarding rule: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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s.l.Listener.Close() // free port, but don't unlock lock file
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commHostPort = s.l.Port
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// Make sure to configure the network interface to NAT
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command := []string{
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"modifyvm", vmName,
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"--nic1",
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"nat",
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}
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if err := driver.VBoxManage(command...); err != nil {
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err := fmt.Errorf("Failed to configure NAT interface: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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// Create a forwarded port mapping to the VM
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ui.Say(fmt.Sprintf("Creating forwarded port mapping for communicator (SSH, WinRM, etc) (host port %d)", commHostPort))
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command = []string{
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"modifyvm", vmName,
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"--natpf1",
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fmt.Sprintf("packercomm,tcp,127.0.0.1,%d,,%d", commHostPort, guestPort),
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}
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retried := false
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retry:
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if err := driver.VBoxManage(command...); err != nil {
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if !strings.Contains(err.Error(), "A NAT rule of this name already exists") || retried {
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err := fmt.Errorf("Error creating port forwarding rule: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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} else {
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log.Printf("A packer NAT rule already exists. Trying to delete ...")
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delcommand := []string{
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"modifyvm", vmName,
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"--natpf1",
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"delete", "packercomm",
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}
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if err := driver.VBoxManage(delcommand...); err != nil {
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err := fmt.Errorf("Error deleting packer NAT forwarding rule: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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goto retry
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}
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}
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}
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// Save the port we're using so that future steps can use it
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state.Put("commHostPort", commHostPort)
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return multistep.ActionContinue
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}
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func (s *StepPortForwarding) Cleanup(state multistep.StateBag) {
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if s.l != nil {
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err := s.l.Close()
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if err != nil {
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log.Printf("failed to unlock port lockfile: %v", err)
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}
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}
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}
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