packer-cn/builder/qemu/step_run.go

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package qemu
import (
"fmt"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
"log"
"path/filepath"
"strings"
)
// stepRun runs the virtual machine
type stepRun struct {
BootDrive string
Message string
}
type qemuArgsTemplateData struct {
HTTPIP string
HTTPPort uint
HTTPDir string
OutputDir string
Name string
}
func (s *stepRun) Run(state multistep.StateBag) multistep.StepAction {
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packer.Ui)
ui.Say(s.Message)
command, err := getCommandArgs(s.BootDrive, state)
if err != nil {
err := fmt.Errorf("Error processing QemuArggs: %s", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
if err := driver.Qemu(command...); err != nil {
err := fmt.Errorf("Error launching VM: %s", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
return multistep.ActionContinue
}
func (s *stepRun) Cleanup(state multistep.StateBag) {
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packer.Ui)
if err := driver.Stop(); err != nil {
ui.Error(fmt.Sprintf("Error shutting down VM: %s", err))
}
}
func getCommandArgs(bootDrive string, state multistep.StateBag) ([]string, error) {
config := state.Get("config").(*config)
isoPath := state.Get("iso_path").(string)
vncPort := state.Get("vnc_port").(uint)
sshHostPort := state.Get("sshHostPort").(uint)
ui := state.Get("ui").(packer.Ui)
guiArgument := "sdl"
vnc := fmt.Sprintf("0.0.0.0:%d", vncPort-5900)
vmName := config.VMName
imgPath := filepath.Join(config.OutputDir,
fmt.Sprintf("%s.%s", vmName, strings.ToLower(config.Format)))
if config.Headless == true {
ui.Message("WARNING: The VM will be started in headless mode, as configured.\n" +
"In headless mode, errors during the boot sequence or OS setup\n" +
"won't be easily visible. Use at your own discretion.")
guiArgument = "none"
}
defaultArgs := make(map[string]string)
defaultArgs["-name"] = vmName
defaultArgs["-machine"] = fmt.Sprintf("type=pc-1.0,accel=%s", config.Accelerator)
defaultArgs["-display"] = guiArgument
defaultArgs["-netdev"] = "user,id=user.0"
defaultArgs["-device"] = fmt.Sprintf("%s,netdev=user.0", config.NetDevice)
defaultArgs["-drive"] = fmt.Sprintf("file=%s,if=%s", imgPath, config.DiskInterface)
defaultArgs["-cdrom"] = isoPath
defaultArgs["-boot"] = bootDrive
defaultArgs["-m"] = "512m"
defaultArgs["-redir"] = fmt.Sprintf("tcp:%v::22", sshHostPort)
defaultArgs["-vnc"] = vnc
// Determine if we have a floppy disk to attach
if floppyPathRaw, ok := state.GetOk("floppy_path"); ok {
defaultArgs["-fda"] = floppyPathRaw.(string)
} else {
log.Println("Qemu Builder has no floppy files, not attaching a floppy.")
}
inArgs := make(map[string][]string)
if len(config.QemuArgs) > 0 {
ui.Say("Overriding defaults Qemu arguments with QemuArgs...")
httpPort := state.Get("http_port").(uint)
tplData := qemuArgsTemplateData{
"10.0.2.2",
httpPort,
config.HTTPDir,
config.OutputDir,
config.VMName,
}
newQemuArgs, err := processArgs(config.QemuArgs, config.tpl, &tplData)
if err != nil {
return nil, err
}
// because qemu supports multiple appearances of the same
// switch, just different values, each key in the args hash
// will have an array of string values
for _, qemuArgs := range newQemuArgs {
key := qemuArgs[0]
val := strings.Join(qemuArgs[1:], "")
if _, ok := inArgs[key]; !ok {
inArgs[key] = make([]string, 0)
}
if len(val) > 0 {
inArgs[key] = append(inArgs[key], val)
}
}
}
// get any remaining missing default args from the default settings
for key := range defaultArgs {
if _, ok := inArgs[key]; !ok {
arg := make([]string, 1)
arg[0] = defaultArgs[key]
inArgs[key] = arg
}
}
// Flatten to array of strings
outArgs := make([]string, 0)
for key, values := range inArgs {
if len(values) > 0 {
for idx := range values {
outArgs = append(outArgs, key, values[idx])
}
} else {
outArgs = append(outArgs, key)
}
}
return outArgs, nil
}
func processArgs(args [][]string, tpl *packer.ConfigTemplate, tplData *qemuArgsTemplateData) ([][]string, error) {
var err error
if args == nil {
return make([][]string, 0), err
}
newArgs := make([][]string, len(args))
for argsIdx, rowArgs := range args {
parms := make([]string, len(rowArgs))
newArgs[argsIdx] = parms
for i, parm := range rowArgs {
parms[i], err = tpl.Process(parm, &tplData)
if err != nil {
return nil, err
}
}
}
return newArgs, err
}