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vbox_executor.go
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vbox_executor.go
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package executor
import (
"bufio"
"bytes"
"fmt"
"io/ioutil"
"net"
"os/exec"
"path/filepath"
"strings"
"time"
gofig "github.com/akutz/gofig/types"
"github.com/akutz/gotil"
"github.com/rexray/rexray/libstorage/api/registry"
"github.com/rexray/rexray/libstorage/api/types"
"github.com/rexray/rexray/libstorage/drivers/storage/vbox"
)
const (
dmidecodeCmd = "dmidecode"
)
// driver is the storage executor for the vbox storage driver.
type driver struct {
config gofig.Config
}
func init() {
registry.RegisterStorageExecutor(vbox.Name, newDriver)
}
func newDriver() types.StorageExecutor {
return &driver{}
}
func (d *driver) Init(ctx types.Context, config gofig.Config) error {
d.config = config
return nil
}
func (d *driver) Name() string {
return vbox.Name
}
func (d *driver) Supported(
ctx types.Context,
opts types.Store) (bool, error) {
// Use dmidecode if installed
if gotil.FileExistsInPath(dmidecodeCmd) {
out, err := exec.Command(
dmidecodeCmd, "-s", "system-product-name").Output()
if err == nil {
outStr := strings.ToLower(gotil.Trim(string(out)))
if outStr == "virtualbox" {
return true, nil
}
}
out, err = exec.Command(
dmidecodeCmd, "-s", "system-manufacturer").Output()
if err == nil {
outStr := strings.ToLower(gotil.Trim(string(out)))
if outStr == "innotek gmbh" {
return true, nil
}
}
}
// No luck with dmidecode, try dmesg
out, err := exec.Command("dmesg").Output()
if err != nil {
return false, nil
}
rdr := bytes.NewReader(out)
scanner := bufio.NewScanner(rdr)
for scanner.Scan() {
if strings.Contains(scanner.Text(), "BIOS VirtualBox") {
return true, nil
}
}
return false, nil
}
func getMacs() ([]string, error) {
interfaces, err := net.Interfaces()
if err != nil {
return nil, err
}
var macs []string
for _, intf := range interfaces {
macUp := strings.ToUpper(strings.Replace(
intf.HardwareAddr.String(), ":", "", -1))
if macUp != "" {
macs = append(macs, macUp)
}
}
return macs, nil
}
// InstanceID returns the local instance ID.
func InstanceID() (*types.InstanceID, error) {
macs, err := getMacs()
if err != nil {
return nil, err
}
iid := &types.InstanceID{Driver: vbox.Name}
if err := iid.MarshalMetadata(macs); err != nil {
return nil, err
}
return iid, nil
}
func (d *driver) InstanceID(
ctx types.Context,
opts types.Store) (*types.InstanceID, error) {
return InstanceID()
}
func (d *driver) NextDevice(
ctx types.Context,
opts types.Store) (string, error) {
return "", types.ErrNotImplemented
}
func (d *driver) LocalDevices(
ctx types.Context,
opts *types.LocalDevicesOpts) (*types.LocalDevices, error) {
mapDiskByID := make(map[string]string)
files, err := ioutil.ReadDir(d.diskIDPath())
if err != nil {
return nil, err
}
if opts.ScanType == types.DeviceScanDeep {
d.rescanScsiHosts()
}
for _, f := range files {
if strings.Contains(f.Name(), "VBOX_HARDDISK_VB") {
sid := d.getShortDeviceID(f.Name())
if sid == "" {
continue
}
devPath, _ := filepath.EvalSymlinks(
fmt.Sprintf("%s/%s", d.diskIDPath(), f.Name()))
mapDiskByID[sid] = devPath
}
}
return &types.LocalDevices{
Driver: vbox.Name,
DeviceMap: mapDiskByID,
}, nil
}
func (d *driver) rescanScsiHosts() {
if dirs, err := ioutil.ReadDir(d.scsiHostPath()); err == nil {
for _, f := range dirs {
name := d.scsiHostPath() + f.Name() + "/scan"
data := []byte("- - -")
ioutil.WriteFile(name, data, 0666)
}
}
time.Sleep(1 * time.Second)
}
func (d *driver) getShortDeviceID(f string) string {
sid := strings.Split(f, "VBOX_HARDDISK_VB")
if len(sid) < 1 {
return ""
}
aid := strings.Split(sid[1], "-")
if len(aid) < 1 {
return ""
}
return aid[0]
}
func (d *driver) username() string {
return d.config.GetString("virtualbox.username")
}
func (d *driver) password() string {
return d.config.GetString("virtualbox.password")
}
func (d *driver) endpoint() string {
return d.config.GetString("virtualbox.endpoint")
}
func (d *driver) volumePath() string {
return d.config.GetString("virtualbox.volumePath")
}
func (d *driver) machineNameID() string {
return d.config.GetString("virtualbox.localMachineNameOrId")
}
func (d *driver) tls() bool {
return d.config.GetBool("virtualbox.tls")
}
func (d *driver) controllerName() string {
return d.config.GetString("virtualbox.controllerName")
}
func (d *driver) diskIDPath() string {
dip := d.config.GetString("virtualbox.diskIDPath")
if dip != "" {
return dip
}
return "/dev/disk/by-id"
}
func (d *driver) scsiHostPath() string {
shp := d.config.GetString("virtualbox.scsiHostPath")
if shp != "" {
return shp
}
return "/sys/class/scsi_host/"
}