107 lines
2.7 KiB
Go
107 lines
2.7 KiB
Go
package iso
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import (
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"fmt"
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"github.com/mitchellh/multistep"
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vmwcommon "github.com/mitchellh/packer/builder/vmware/common"
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"github.com/mitchellh/packer/packer"
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"io/ioutil"
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"log"
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"math/rand"
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"net"
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"os"
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)
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// This step configures the VM to enable the VNC server.
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//
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// Uses:
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// config *config
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// ui packer.Ui
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// vmx_path string
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//
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// Produces:
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// vnc_port uint - The port that VNC is configured to listen on.
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type stepConfigureVNC struct{}
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type VNCAddressFinder interface {
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VNCAddress(uint, uint) (string, uint)
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}
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func (stepConfigureVNC) VNCAddress(portMin, portMax uint) (string, uint) {
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// Find an open VNC port. Note that this can still fail later on
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// because we have to release the port at some point. But this does its
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// best.
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var vncPort uint
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portRange := int(portMax - portMin)
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for {
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vncPort = uint(rand.Intn(portRange)) + portMin
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log.Printf("Trying port: %d", vncPort)
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l, err := net.Listen("tcp", fmt.Sprintf(":%d", vncPort))
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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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return "127.0.0.1", vncPort
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}
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func (s *stepConfigureVNC) Run(state multistep.StateBag) multistep.StepAction {
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config := state.Get("config").(*config)
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driver := state.Get("driver").(vmwcommon.Driver)
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ui := state.Get("ui").(packer.Ui)
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vmxPath := state.Get("vmx_path").(string)
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f, err := os.Open(vmxPath)
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if err != nil {
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err := fmt.Errorf("Error reading VMX data: %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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vmxBytes, err := ioutil.ReadAll(f)
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if err != nil {
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err := fmt.Errorf("Error reading VMX data: %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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var vncFinder VNCAddressFinder
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if finder, ok := driver.(VNCAddressFinder); ok {
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vncFinder = finder
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} else {
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vncFinder = s
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}
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log.Printf("Looking for available port between %d and %d", config.VNCPortMin, config.VNCPortMax)
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vncIp, vncPort := vncFinder.VNCAddress(config.VNCPortMin, config.VNCPortMax)
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if vncPort == 0 {
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err := fmt.Errorf("Unable to find available VNC port between %d and %d",
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config.VNCPortMin, config.VNCPortMax)
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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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log.Printf("Found available VNC port: %d", vncPort)
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vmxData := vmwcommon.ParseVMX(string(vmxBytes))
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vmxData["remotedisplay.vnc.enabled"] = "TRUE"
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vmxData["remotedisplay.vnc.port"] = fmt.Sprintf("%d", vncPort)
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if err := vmwcommon.WriteVMX(vmxPath, vmxData); err != nil {
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err := fmt.Errorf("Error writing VMX data: %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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state.Put("vnc_port", vncPort)
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state.Put("vnc_ip", vncIp)
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return multistep.ActionContinue
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}
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func (stepConfigureVNC) Cleanup(multistep.StateBag) {
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}
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