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driver_esx5.go
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driver_esx5.go
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package iso
import (
"bufio"
"bytes"
"encoding/csv"
"errors"
"fmt"
"io"
"log"
"net"
"os"
"path/filepath"
"strings"
"time"
"github.com/mitchellh/multistep"
commonssh "github.com/mitchellh/packer/common/ssh"
"github.com/mitchellh/packer/communicator/ssh"
"github.com/mitchellh/packer/packer"
gossh "golang.org/x/crypto/ssh"
)
// ESX5 driver talks to an ESXi5 hypervisor remotely over SSH to build
// virtual machines. This driver can only manage one machine at a time.
type ESX5Driver struct {
Host string
Port uint
Username string
Password string
PrivateKey string
Datastore string
CacheDatastore string
CacheDirectory string
comm packer.Communicator
outputDir string
vmId string
}
func (d *ESX5Driver) Clone(dst, src string) error {
return errors.New("Cloning is not supported with the ESX driver.")
}
func (d *ESX5Driver) CompactDisk(diskPathLocal string) error {
return nil
}
func (d *ESX5Driver) CreateDisk(diskPathLocal string, size string, typeId string) error {
diskPath := d.datastorePath(diskPathLocal)
return d.sh("vmkfstools", "-c", size, "-d", typeId, "-a", "lsilogic", diskPath)
}
func (d *ESX5Driver) IsRunning(string) (bool, error) {
state, err := d.run(nil, "vim-cmd", "vmsvc/power.getstate", d.vmId)
if err != nil {
return false, err
}
return strings.Contains(state, "Powered on"), nil
}
func (d *ESX5Driver) ReloadVM() error {
return d.sh("vim-cmd", "vmsvc/reload", d.vmId)
}
func (d *ESX5Driver) Start(vmxPathLocal string, headless bool) error {
for i := 0; i < 20; i++ {
err := d.sh("vim-cmd", "vmsvc/power.on", d.vmId)
if err != nil {
return err
}
time.Sleep((time.Duration(i) * time.Second) + 1)
running, err := d.IsRunning(vmxPathLocal)
if err != nil {
return err
}
if running {
return nil
}
}
return errors.New("Retry limit exceeded")
}
func (d *ESX5Driver) Stop(vmxPathLocal string) error {
return d.sh("vim-cmd", "vmsvc/power.off", d.vmId)
}
func (d *ESX5Driver) Register(vmxPathLocal string) error {
vmxPath := filepath.ToSlash(filepath.Join(d.outputDir, filepath.Base(vmxPathLocal)))
if err := d.upload(vmxPath, vmxPathLocal); err != nil {
return err
}
r, err := d.run(nil, "vim-cmd", "solo/registervm", vmxPath)
if err != nil {
return err
}
d.vmId = strings.TrimRight(r, "\n")
return nil
}
func (d *ESX5Driver) SuppressMessages(vmxPath string) error {
return nil
}
func (d *ESX5Driver) Unregister(vmxPathLocal string) error {
return d.sh("vim-cmd", "vmsvc/unregister", d.vmId)
}
func (d *ESX5Driver) Destroy() error {
return d.sh("vim-cmd", "vmsvc/destroy", d.vmId)
}
func (d *ESX5Driver) IsDestroyed() (bool, error) {
err := d.sh("test", "!", "-e", d.outputDir)
if err != nil {
return false, err
}
return true, err
}
func (d *ESX5Driver) UploadISO(localPath string, checksum string, checksumType string) (string, error) {
finalPath := d.cachePath(localPath)
if err := d.mkdir(filepath.ToSlash(filepath.Dir(finalPath))); err != nil {
return "", err
}
log.Printf("Verifying checksum of %s", finalPath)
if d.verifyChecksum(checksumType, checksum, finalPath) {
log.Println("Initial checksum matched, no upload needed.")
return finalPath, nil
}
if err := d.upload(finalPath, localPath); err != nil {
return "", err
}
return finalPath, nil
}
func (d *ESX5Driver) ToolsIsoPath(string) string {
return ""
}
func (d *ESX5Driver) ToolsInstall() error {
return d.sh("vim-cmd", "vmsvc/tools.install", d.vmId)
}
func (d *ESX5Driver) DhcpLeasesPath(string) string {
return ""
}
func (d *ESX5Driver) Verify() error {
checks := []func() error{
d.connect,
d.checkSystemVersion,
d.checkGuestIPHackEnabled,
}
for _, check := range checks {
if err := check(); err != nil {
return err
}
}
return nil
}
func (d *ESX5Driver) HostIP() (string, error) {
conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", d.Host, d.Port))
defer conn.Close()
if err != nil {
return "", err
}
host, _, err := net.SplitHostPort(conn.LocalAddr().String())
return host, err
}
func (d *ESX5Driver) VNCAddress(portMin, portMax uint) (string, uint, error) {
var vncPort uint
//Process ports ESXi is listening on to determine which are available
//This process does best effort to detect ports that are unavailable,
//it will ignore any ports listened to by only localhost
r, err := d.esxcli("network", "ip", "connection", "list")
if err != nil {
err = fmt.Errorf("Could not retrieve network information for ESXi: %v", err)
return "", 0, err
}
listenPorts := make(map[string]bool)
for record, err := r.read(); record != nil && err == nil; record, err = r.read() {
if record["State"] == "LISTEN" {
splitAddress := strings.Split(record["LocalAddress"], ":")
if splitAddress[0] != "127.0.0.1" {
port := splitAddress[len(splitAddress)-1]
log.Printf("ESXi listening on address %s, port %s unavailable for VNC", record["LocalAddress"], port)
listenPorts[port] = true
}
}
}
for port := portMin; port <= portMax; port++ {
if _, ok := listenPorts[fmt.Sprintf("%d", port)]; ok {
log.Printf("Port %d in use", port)
continue
}
address := fmt.Sprintf("%s:%d", d.Host, port)
log.Printf("Trying address: %s...", address)
l, err := net.DialTimeout("tcp", address, 1*time.Second)
if err != nil {
if e, ok := err.(*net.OpError); ok {
if e.Timeout() {
log.Printf("Timeout connecting to: %s (check firewall rules)", address)
} else {
vncPort = port
break
}
}
} else {
defer l.Close()
}
}
if vncPort == 0 {
err := fmt.Errorf("Unable to find available VNC port between %d and %d",
portMin, portMax)
return d.Host, vncPort, err
}
return d.Host, vncPort, nil
}
func (d *ESX5Driver) CommHost(state multistep.StateBag) (string, error) {
config := state.Get("config").(*Config)
if address, ok := state.GetOk("vm_address"); ok {
return address.(string), nil
}
r, err := d.esxcli("network", "vm", "list")
if err != nil {
return "", err
}
record, err := r.find("Name", config.VMName)
if err != nil {
return "", err
}
wid := record["WorldID"]
if wid == "" {
return "", errors.New("VM WorldID not found")
}
r, err = d.esxcli("network", "vm", "port", "list", "-w", wid)
if err != nil {
return "", err
}
record, err = r.read()
if err != nil {
return "", err
}
if record["IPAddress"] == "0.0.0.0" {
return "", errors.New("VM network port found, but no IP address")
}
address := record["IPAddress"]
state.Put("vm_address", address)
return address, nil
}
//-------------------------------------------------------------------
// OutputDir implementation
//-------------------------------------------------------------------
func (d *ESX5Driver) DirExists() (bool, error) {
err := d.sh("test", "-e", d.outputDir)
return err == nil, nil
}
func (d *ESX5Driver) ListFiles() ([]string, error) {
stdout, err := d.ssh("ls -1p "+d.outputDir, nil)
if err != nil {
return nil, err
}
files := make([]string, 0, 10)
reader := bufio.NewReader(stdout)
for {
line, _, err := reader.ReadLine()
if err == io.EOF {
break
}
if line[len(line)-1] == '/' {
continue
}
files = append(files, filepath.ToSlash(filepath.Join(d.outputDir, string(line))))
}
return files, nil
}
func (d *ESX5Driver) MkdirAll() error {
return d.mkdir(d.outputDir)
}
func (d *ESX5Driver) Remove(path string) error {
return d.sh("rm", path)
}
func (d *ESX5Driver) RemoveAll() error {
return d.sh("rm", "-rf", d.outputDir)
}
func (d *ESX5Driver) SetOutputDir(path string) {
d.outputDir = d.datastorePath(path)
}
func (d *ESX5Driver) String() string {
return d.outputDir
}
func (d *ESX5Driver) datastorePath(path string) string {
dirPath := filepath.Dir(path)
return filepath.ToSlash(filepath.Join("/vmfs/volumes", d.Datastore, dirPath, filepath.Base(path)))
}
func (d *ESX5Driver) cachePath(path string) string {
return filepath.ToSlash(filepath.Join("/vmfs/volumes", d.CacheDatastore, d.CacheDirectory, filepath.Base(path)))
}
func (d *ESX5Driver) connect() error {
address := fmt.Sprintf("%s:%d", d.Host, d.Port)
auth := []gossh.AuthMethod{
gossh.Password(d.Password),
gossh.KeyboardInteractive(
ssh.PasswordKeyboardInteractive(d.Password)),
}
if d.PrivateKey != "" {
signer, err := commonssh.FileSigner(d.PrivateKey)
if err != nil {
return err
}
auth = append(auth, gossh.PublicKeys(signer))
}
sshConfig := &ssh.Config{
Connection: ssh.ConnectFunc("tcp", address),
SSHConfig: &gossh.ClientConfig{
User: d.Username,
Auth: auth,
},
}
comm, err := ssh.New(address, sshConfig)
if err != nil {
return err
}
d.comm = comm
return nil
}
func (d *ESX5Driver) checkSystemVersion() error {
r, err := d.esxcli("system", "version", "get")
if err != nil {
return err
}
record, err := r.read()
if err != nil {
return err
}
log.Printf("Connected to %s %s %s", record["Product"],
record["Version"], record["Build"])
return nil
}
func (d *ESX5Driver) checkGuestIPHackEnabled() error {
r, err := d.esxcli("system", "settings", "advanced", "list", "-o", "/Net/GuestIPHack")
if err != nil {
return err
}
record, err := r.read()
if err != nil {
return err
}
if record["IntValue"] != "1" {
return errors.New(
"GuestIPHack is required, enable by running this on the ESX machine:\n" +
"esxcli system settings advanced set -o /Net/GuestIPHack -i 1")
}
return nil
}
func (d *ESX5Driver) mkdir(path string) error {
return d.sh("mkdir", "-p", path)
}
func (d *ESX5Driver) upload(dst, src string) error {
f, err := os.Open(src)
if err != nil {
return err
}
defer f.Close()
return d.comm.Upload(dst, f, nil)
}
func (d *ESX5Driver) verifyChecksum(ctype string, hash string, file string) bool {
if ctype == "none" {
if err := d.sh("stat", file); err != nil {
return false
}
} else {
stdin := bytes.NewBufferString(fmt.Sprintf("%s %s", hash, file))
_, err := d.run(stdin, fmt.Sprintf("%ssum", ctype), "-c")
if err != nil {
return false
}
}
return true
}
func (d *ESX5Driver) ssh(command string, stdin io.Reader) (*bytes.Buffer, error) {
var stdout, stderr bytes.Buffer
cmd := &packer.RemoteCmd{
Command: command,
Stdout: &stdout,
Stderr: &stderr,
Stdin: stdin,
}
err := d.comm.Start(cmd)
if err != nil {
return nil, err
}
cmd.Wait()
if cmd.ExitStatus != 0 {
err = fmt.Errorf("'%s'\n\nStdout: %s\n\nStderr: %s",
cmd.Command, stdout.String(), stderr.String())
return nil, err
}
return &stdout, nil
}
func (d *ESX5Driver) run(stdin io.Reader, args ...string) (string, error) {
stdout, err := d.ssh(strings.Join(args, " "), stdin)
if err != nil {
return "", err
}
return stdout.String(), nil
}
func (d *ESX5Driver) sh(args ...string) error {
_, err := d.run(nil, args...)
return err
}
func (d *ESX5Driver) esxcli(args ...string) (*esxcliReader, error) {
stdout, err := d.ssh("esxcli --formatter csv "+strings.Join(args, " "), nil)
if err != nil {
return nil, err
}
r := csv.NewReader(bytes.NewReader(stdout.Bytes()))
r.TrailingComma = true
header, err := r.Read()
if err != nil {
return nil, err
}
return &esxcliReader{r, header}, nil
}
type esxcliReader struct {
cr *csv.Reader
header []string
}
func (r *esxcliReader) read() (map[string]string, error) {
fields, err := r.cr.Read()
if err != nil {
return nil, err
}
record := map[string]string{}
for i, v := range fields {
record[r.header[i]] = v
}
return record, nil
}
func (r *esxcliReader) find(key, val string) (map[string]string, error) {
for {
record, err := r.read()
if err != nil {
return nil, err
}
if record[key] == val {
return record, nil
}
}
}