60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
package virtualbox
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import (
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"fmt"
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"github.com/mitchellh/multistep"
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"github.com/mitchellh/packer/packer"
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"log"
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"math/rand"
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"net"
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)
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// This step adds a NAT port forwarding definition so that SSH is available
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// on the guest machine.
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//
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// Uses:
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//
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// Produces:
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type stepForwardSSH struct{}
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func (s *stepForwardSSH) Run(state map[string]interface{}) multistep.StepAction {
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config := state["config"].(*config)
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driver := state["driver"].(Driver)
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ui := state["ui"].(packer.Ui)
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vmName := state["vmName"].(string)
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log.Printf("Looking for available SSH port between %d and %d", config.SSHHostPortMin, config.SSHHostPortMax)
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var sshHostPort uint
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portRange := int(config.SSHHostPortMax - config.SSHHostPortMin)
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for {
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sshHostPort = uint(rand.Intn(portRange)) + config.SSHHostPortMin
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log.Printf("Trying port: %d", sshHostPort)
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l, err := net.Listen("tcp", fmt.Sprintf(":%d", sshHostPort))
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if err == nil {
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defer l.Close()
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break
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}
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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 SSH (host port %d)", sshHostPort))
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command := []string{
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"modifyvm", vmName,
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"--natpf1",
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fmt.Sprintf("packerssh,tcp,127.0.0.1,%d,,%d", sshHostPort, config.SSHPort),
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}
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if err := driver.VBoxManage(command...); err != nil {
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err := fmt.Errorf("Error creating port forwarding rule: %s", err)
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state["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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// Save the port we're using so that future steps can use it
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state["sshHostPort"] = sshHostPort
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return multistep.ActionContinue
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}
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func (s *stepForwardSSH) Cleanup(state map[string]interface{}) {}
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