packer-cn/builder/qemu/builder.go

519 lines
14 KiB
Go

package qemu
import (
"errors"
"fmt"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/common"
commonssh "github.com/mitchellh/packer/common/ssh"
"github.com/mitchellh/packer/packer"
)
const BuilderId = "transcend.qemu"
var accels = map[string]struct{}{
"none": struct{}{},
"kvm": struct{}{},
"tcg": struct{}{},
"xen": struct{}{},
}
var netDevice = map[string]bool{
"ne2k_pci": true,
"i82551": true,
"i82557b": true,
"i82559er": true,
"rtl8139": true,
"e1000": true,
"pcnet": true,
"virtio": true,
"virtio-net": true,
"virtio-net-pci": true,
"usb-net": true,
"i82559a": true,
"i82559b": true,
"i82559c": true,
"i82550": true,
"i82562": true,
"i82557a": true,
"i82557c": true,
"i82801": true,
"vmxnet3": true,
"i82558a": true,
"i82558b": true,
}
var diskInterface = map[string]bool{
"ide": true,
"scsi": true,
"virtio": true,
}
type Builder struct {
config config
runner multistep.Runner
}
type config struct {
common.PackerConfig `mapstructure:",squash"`
Accelerator string `mapstructure:"accelerator"`
BootCommand []string `mapstructure:"boot_command"`
DiskInterface string `mapstructure:"disk_interface"`
DiskSize uint `mapstructure:"disk_size"`
FloppyFiles []string `mapstructure:"floppy_files"`
Format string `mapstructure:"format"`
Headless bool `mapstructure:"headless"`
HTTPDir string `mapstructure:"http_directory"`
HTTPPortMin uint `mapstructure:"http_port_min"`
HTTPPortMax uint `mapstructure:"http_port_max"`
ISOChecksum string `mapstructure:"iso_checksum"`
ISOChecksumType string `mapstructure:"iso_checksum_type"`
ISOUrls []string `mapstructure:"iso_urls"`
MachineType string `mapstructure:"machine_type"`
NetDevice string `mapstructure:"net_device"`
OutputDir string `mapstructure:"output_directory"`
QemuArgs [][]string `mapstructure:"qemuargs"`
QemuBinary string `mapstructure:"qemu_binary"`
ShutdownCommand string `mapstructure:"shutdown_command"`
SSHHostPortMin uint `mapstructure:"ssh_host_port_min"`
SSHHostPortMax uint `mapstructure:"ssh_host_port_max"`
SSHPassword string `mapstructure:"ssh_password"`
SSHPort uint `mapstructure:"ssh_port"`
SSHUser string `mapstructure:"ssh_username"`
SSHKeyPath string `mapstructure:"ssh_key_path"`
VNCPortMin uint `mapstructure:"vnc_port_min"`
VNCPortMax uint `mapstructure:"vnc_port_max"`
VMName string `mapstructure:"vm_name"`
// TODO(mitchellh): deprecate
RunOnce bool `mapstructure:"run_once"`
RawBootWait string `mapstructure:"boot_wait"`
RawSingleISOUrl string `mapstructure:"iso_url"`
RawShutdownTimeout string `mapstructure:"shutdown_timeout"`
RawSSHWaitTimeout string `mapstructure:"ssh_wait_timeout"`
bootWait time.Duration ``
shutdownTimeout time.Duration ``
sshWaitTimeout time.Duration ``
tpl *packer.ConfigTemplate
}
func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
md, err := common.DecodeConfig(&b.config, raws...)
if err != nil {
return nil, err
}
b.config.tpl, err = packer.NewConfigTemplate()
if err != nil {
return nil, err
}
b.config.tpl.UserVars = b.config.PackerUserVars
// Accumulate any errors
errs := common.CheckUnusedConfig(md)
if b.config.DiskSize == 0 {
b.config.DiskSize = 40000
}
if b.config.Accelerator == "" {
b.config.Accelerator = "kvm"
}
if b.config.HTTPPortMin == 0 {
b.config.HTTPPortMin = 8000
}
if b.config.HTTPPortMax == 0 {
b.config.HTTPPortMax = 9000
}
if b.config.MachineType == "" {
b.config.MachineType = "pc-1.0"
}
if b.config.OutputDir == "" {
b.config.OutputDir = fmt.Sprintf("output-%s", b.config.PackerBuildName)
}
if b.config.QemuBinary == "" {
b.config.QemuBinary = "qemu-system-x86_64"
}
if b.config.RawBootWait == "" {
b.config.RawBootWait = "10s"
}
if b.config.SSHHostPortMin == 0 {
b.config.SSHHostPortMin = 2222
}
if b.config.SSHHostPortMax == 0 {
b.config.SSHHostPortMax = 4444
}
if b.config.SSHPort == 0 {
b.config.SSHPort = 22
}
if b.config.VNCPortMin == 0 {
b.config.VNCPortMin = 5900
}
if b.config.VNCPortMax == 0 {
b.config.VNCPortMax = 6000
}
for i, args := range b.config.QemuArgs {
for j, arg := range args {
if err := b.config.tpl.Validate(arg); err != nil {
errs = packer.MultiErrorAppend(errs,
fmt.Errorf("Error processing qemu-system_x86-64[%d][%d]: %s", i, j, err))
}
}
}
if b.config.VMName == "" {
b.config.VMName = fmt.Sprintf("packer-%s", b.config.PackerBuildName)
}
if b.config.Format == "" {
b.config.Format = "qcow2"
}
if b.config.FloppyFiles == nil {
b.config.FloppyFiles = make([]string, 0)
}
if b.config.NetDevice == "" {
b.config.NetDevice = "virtio-net"
}
if b.config.DiskInterface == "" {
b.config.DiskInterface = "virtio"
}
// Errors
templates := map[string]*string{
"http_directory": &b.config.HTTPDir,
"iso_checksum": &b.config.ISOChecksum,
"iso_checksum_type": &b.config.ISOChecksumType,
"iso_url": &b.config.RawSingleISOUrl,
"output_directory": &b.config.OutputDir,
"shutdown_command": &b.config.ShutdownCommand,
"ssh_key_path": &b.config.SSHKeyPath,
"ssh_password": &b.config.SSHPassword,
"ssh_username": &b.config.SSHUser,
"vm_name": &b.config.VMName,
"format": &b.config.Format,
"boot_wait": &b.config.RawBootWait,
"shutdown_timeout": &b.config.RawShutdownTimeout,
"ssh_wait_timeout": &b.config.RawSSHWaitTimeout,
"accelerator": &b.config.Accelerator,
"machine_type": &b.config.MachineType,
"net_device": &b.config.NetDevice,
"disk_interface": &b.config.DiskInterface,
}
for n, ptr := range templates {
var err error
*ptr, err = b.config.tpl.Process(*ptr, nil)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Error processing %s: %s", n, err))
}
}
for i, url := range b.config.ISOUrls {
var err error
b.config.ISOUrls[i], err = b.config.tpl.Process(url, nil)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Error processing iso_urls[%d]: %s", i, err))
}
}
for i, command := range b.config.BootCommand {
if err := b.config.tpl.Validate(command); err != nil {
errs = packer.MultiErrorAppend(errs,
fmt.Errorf("Error processing boot_command[%d]: %s", i, err))
}
}
for i, file := range b.config.FloppyFiles {
var err error
b.config.FloppyFiles[i], err = b.config.tpl.Process(file, nil)
if err != nil {
errs = packer.MultiErrorAppend(errs,
fmt.Errorf("Error processing floppy_files[%d]: %s",
i, err))
}
}
if !(b.config.Format == "qcow2" || b.config.Format == "raw") {
errs = packer.MultiErrorAppend(
errs, errors.New("invalid format, only 'qcow2' or 'raw' are allowed"))
}
if _, ok := accels[b.config.Accelerator]; !ok {
errs = packer.MultiErrorAppend(
errs, errors.New("invalid accelerator, only 'kvm', 'tcg', 'xen', or 'none' are allowed"))
}
if _, ok := netDevice[b.config.NetDevice]; !ok {
errs = packer.MultiErrorAppend(
errs, errors.New("unrecognized network device type"))
}
if _, ok := diskInterface[b.config.DiskInterface]; !ok {
errs = packer.MultiErrorAppend(
errs, errors.New("unrecognized disk interface type"))
}
if b.config.HTTPPortMin > b.config.HTTPPortMax {
errs = packer.MultiErrorAppend(
errs, errors.New("http_port_min must be less than http_port_max"))
}
if b.config.ISOChecksum == "" {
errs = packer.MultiErrorAppend(
errs, errors.New("Due to large file sizes, an iso_checksum is required"))
} else {
b.config.ISOChecksum = strings.ToLower(b.config.ISOChecksum)
}
if b.config.ISOChecksumType == "" {
errs = packer.MultiErrorAppend(
errs, errors.New("The iso_checksum_type must be specified."))
} else {
b.config.ISOChecksumType = strings.ToLower(b.config.ISOChecksumType)
if h := common.HashForType(b.config.ISOChecksumType); h == nil {
errs = packer.MultiErrorAppend(
errs,
fmt.Errorf("Unsupported checksum type: %s", b.config.ISOChecksumType))
}
}
if b.config.RawSingleISOUrl == "" && len(b.config.ISOUrls) == 0 {
errs = packer.MultiErrorAppend(
errs, errors.New("One of iso_url or iso_urls must be specified."))
} else if b.config.RawSingleISOUrl != "" && len(b.config.ISOUrls) > 0 {
errs = packer.MultiErrorAppend(
errs, errors.New("Only one of iso_url or iso_urls may be specified."))
} else if b.config.RawSingleISOUrl != "" {
b.config.ISOUrls = []string{b.config.RawSingleISOUrl}
}
for i, url := range b.config.ISOUrls {
b.config.ISOUrls[i], err = common.DownloadableURL(url)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Failed to parse iso_url %d: %s", i+1, err))
}
}
if !b.config.PackerForce {
if _, err := os.Stat(b.config.OutputDir); err == nil {
errs = packer.MultiErrorAppend(
errs,
fmt.Errorf("Output directory '%s' already exists. It must not exist.", b.config.OutputDir))
}
}
b.config.bootWait, err = time.ParseDuration(b.config.RawBootWait)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Failed parsing boot_wait: %s", err))
}
if b.config.RawShutdownTimeout == "" {
b.config.RawShutdownTimeout = "5m"
}
if b.config.RawSSHWaitTimeout == "" {
b.config.RawSSHWaitTimeout = "20m"
}
b.config.shutdownTimeout, err = time.ParseDuration(b.config.RawShutdownTimeout)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Failed parsing shutdown_timeout: %s", err))
}
if b.config.SSHKeyPath != "" {
if _, err := os.Stat(b.config.SSHKeyPath); err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("ssh_key_path is invalid: %s", err))
} else if _, err := commonssh.FileSigner(b.config.SSHKeyPath); err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("ssh_key_path is invalid: %s", err))
}
}
if b.config.SSHHostPortMin > b.config.SSHHostPortMax {
errs = packer.MultiErrorAppend(
errs, errors.New("ssh_host_port_min must be less than ssh_host_port_max"))
}
if b.config.SSHUser == "" {
errs = packer.MultiErrorAppend(
errs, errors.New("An ssh_username must be specified."))
}
b.config.sshWaitTimeout, err = time.ParseDuration(b.config.RawSSHWaitTimeout)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Failed parsing ssh_wait_timeout: %s", err))
}
if b.config.VNCPortMin > b.config.VNCPortMax {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("vnc_port_min must be less than vnc_port_max"))
}
if b.config.QemuArgs == nil {
b.config.QemuArgs = make([][]string, 0)
}
if errs != nil && len(errs.Errors) > 0 {
return nil, errs
}
return nil, nil
}
func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
// Create the driver that we'll use to communicate with Qemu
driver, err := b.newDriver(b.config.QemuBinary)
if err != nil {
return nil, fmt.Errorf("Failed creating Qemu driver: %s", err)
}
steps := []multistep.Step{
&common.StepDownload{
Checksum: b.config.ISOChecksum,
ChecksumType: b.config.ISOChecksumType,
Description: "ISO",
ResultKey: "iso_path",
Url: b.config.ISOUrls,
},
new(stepPrepareOutputDir),
&common.StepCreateFloppy{
Files: b.config.FloppyFiles,
},
new(stepCreateDisk),
new(stepHTTPServer),
new(stepForwardSSH),
new(stepConfigureVNC),
&stepRun{
BootDrive: "once=d",
Message: "Starting VM, booting from CD-ROM",
},
&stepBootWait{},
&stepTypeBootCommand{},
&common.StepConnectSSH{
SSHAddress: sshAddress,
SSHConfig: sshConfig,
SSHWaitTimeout: b.config.sshWaitTimeout,
},
new(common.StepProvision),
new(stepShutdown),
}
// Setup the state bag
state := new(multistep.BasicStateBag)
state.Put("cache", cache)
state.Put("config", &b.config)
state.Put("driver", driver)
state.Put("hook", hook)
state.Put("ui", ui)
// Run
if b.config.PackerDebug {
b.runner = &multistep.DebugRunner{
Steps: steps,
PauseFn: common.MultistepDebugFn(ui),
}
} else {
b.runner = &multistep.BasicRunner{Steps: steps}
}
b.runner.Run(state)
// If there was an error, return that
if rawErr, ok := state.GetOk("error"); ok {
return nil, rawErr.(error)
}
// If we were interrupted or cancelled, then just exit.
if _, ok := state.GetOk(multistep.StateCancelled); ok {
return nil, errors.New("Build was cancelled.")
}
if _, ok := state.GetOk(multistep.StateHalted); ok {
return nil, errors.New("Build was halted.")
}
// Compile the artifact list
files := make([]string, 0, 5)
visit := func(path string, info os.FileInfo, err error) error {
if !info.IsDir() {
files = append(files, path)
}
return err
}
if err := filepath.Walk(b.config.OutputDir, visit); err != nil {
return nil, err
}
artifact := &Artifact{
dir: b.config.OutputDir,
f: files,
}
return artifact, nil
}
func (b *Builder) Cancel() {
if b.runner != nil {
log.Println("Cancelling the step runner...")
b.runner.Cancel()
}
}
func (b *Builder) newDriver(qemuBinary string) (Driver, error) {
qemuPath, err := exec.LookPath(qemuBinary)
if err != nil {
return nil, err
}
qemuImgPath, err := exec.LookPath("qemu-img")
if err != nil {
return nil, err
}
log.Printf("Qemu path: %s, Qemu Image page: %s", qemuPath, qemuImgPath)
driver := &QemuDriver{
QemuPath: qemuPath,
QemuImgPath: qemuImgPath,
}
if err := driver.Verify(); err != nil {
return nil, err
}
return driver, nil
}