Commit aee611db authored by Mitchell Hashimoto's avatar Mitchell Hashimoto

builder/vmware: Support reading guest IP from DHCP

parent 323647e3
package vmware
import (
"fmt"
"io/ioutil"
"os"
"regexp"
"strings"
"time"
)
// Interface to help find the IP address of a running virtual machine.
type GuestIPFinder interface {
GuestIP() (string, error)
......@@ -9,12 +18,55 @@ type GuestIPFinder interface {
// lease information from the VMware network devices.
type DHCPLeaseGuestLookup struct {
// Device that the guest is connected to.
Device string
Device string
// MAC address of the guest.
MACAddress string
}
func (f *DHCPLeaseGuestLookup) GuestIP() (string, error) {
return "", nil
fh, err := os.Open(fmt.Sprintf("/var/db/vmware/vmnet-dhcpd-%s.leases", f.Device))
if err != nil {
return "", err
}
defer fh.Close()
dhcpBytes, err := ioutil.ReadAll(fh)
if err != nil {
return "", err
}
var lastIp string
var lastLeaseEnd time.Time
var curIp string
var curLeaseEnd time.Time
ipLineRe := regexp.MustCompile(`^lease (.+?) {$`)
endTimeLineRe := regexp.MustCompile(`^\s*ends \d (.+?);$`)
macLineRe := regexp.MustCompile(`^\s*hardware ethernet (.+?);$`)
for _, line := range strings.Split(string(dhcpBytes), "\n") {
matches := ipLineRe.FindStringSubmatch(line)
if matches != nil {
lastIp = matches[1]
continue
}
matches = endTimeLineRe.FindStringSubmatch(line)
if matches != nil {
lastLeaseEnd, _ = time.Parse("2006/01/02 15:04:05", matches[1])
continue
}
// If the mac address matches and this lease ends farther in the
// future than the last match we might have, then choose it.
matches = macLineRe.FindStringSubmatch(line)
if matches != nil && matches[1] == f.MACAddress && curLeaseEnd.Before(lastLeaseEnd) {
curIp = lastIp
curLeaseEnd = lastLeaseEnd
}
}
return curIp, nil
}
package vmware
import (
"errors"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
"io/ioutil"
"log"
"os"
"time"
)
// This step waits for SSH to become available and establishes an SSH
......@@ -11,21 +16,63 @@ import (
// Uses:
// config *config
// ui packer.Ui
// vmx_path string
//
// Produces:
// <nothing>
type stepWaitForSSH struct{}
func (stepWaitForSSH) Run(state map[string]interface{}) multistep.StepAction {
func (s *stepWaitForSSH) Run(state map[string]interface{}) multistep.StepAction {
ui := state["ui"].(packer.Ui)
vmxPath := state["vmx_path"].(string)
ui.Say("Waiting for SSH to become available...")
for {
time.Sleep(5 * time.Second)
log.Println("Lookup up IP information...")
// First we wait for the IP to become available...
ipLookup, err := s.dhcpLeaseLookup(vmxPath)
if err != nil {
log.Printf("Can't lookup via DHCP lease: %s", err)
}
ip, err := ipLookup.GuestIP()
if err != nil {
log.Printf("IP lookup failed: %s", err)
continue
}
log.Printf("Detected IP: %s", ip)
}
return multistep.ActionContinue
}
func (stepWaitForSSH) Cleanup(map[string]interface{}) {}
func (s *stepWaitForSSH) Cleanup(map[string]interface{}) {}
// Reads the network information for lookup via DHCP.
func (s *stepWaitForSSH) dhcpLeaseLookup(vmxPath string) (GuestIPFinder, error) {
f, err := os.Open(vmxPath)
if err != nil {
return nil, err
}
defer f.Close()
vmxBytes, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
vmxData := ParseVMX(string(vmxBytes))
var ok bool
macAddress := ""
if macAddress, ok = vmxData["ethernet0.address"]; !ok || macAddress == "" {
if macAddress, ok = vmxData["ethernet0.generatedAddress"]; !ok || macAddress == "" {
return nil, errors.New("couldn't find MAC address in VMX")
}
}
return &DHCPLeaseGuestLookup{"vmnet8", macAddress}, nil
}
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