// Run returns JSON responses to each command or an error
func (mockCmd MockVmdkCmd) Run(cmd string, name string, opts map[string]string) ([]byte, error) {
// We store no in memory state, so just try to recreate backingRoot every time
rootName := fmt.Sprintf("%s/%d", backingRoot, os.Getpid())
err := fs.Mkdir(rootName)
if err != nil {
return nil, err
}
log.WithFields(log.Fields{"cmd": cmd}).Debug("Running Mock Cmd")
switch cmd {
case "create":
err := createBlockDevice(name, opts)
return nil, err
case "list":
return list()
case "get":
return nil, get(name)
case "attach":
return getBlockDeviceForName(name)
case "detach":
return nil, nil
case "remove":
err := remove(name)
return nil, err
}
return []byte("null"), nil
}
// Request attach and them mounts the volume.
// Actual mount - send attach to ESX and do the in-guest magic
// Returns mount point and error (or nil)
func (d *vmdkDriver) mountVolume(name string, fstype string, isReadOnly bool) (string, error) {
mountpoint := getMountPoint(name)
// First, make sure that mountpoint exists.
err := fs.Mkdir(mountpoint)
if err != nil {
log.WithFields(
log.Fields{"name": name, "dir": mountpoint},
).Error("Failed to make directory for volume mount ")
return mountpoint, err
}
skipInotify := false
watcher, err := inotify.NewWatcher()
if err != nil {
log.WithFields(
log.Fields{"name": name, "dir": mountpoint},
).Error("Failed to create watcher, skip inotify ")
skipInotify = true
} else {
err = watcher.Watch(watchPath)
if err != nil {
log.WithFields(
log.Fields{"name": name, "dir": mountpoint},
).Error("Failed to watch /dev, skip inotify ")
skipInotify = true
}
}
// Have ESX attach the disk
dev, err := d.ops.Attach(name, nil)
if err != nil {
return mountpoint, err
}
if d.useMockEsx {
return mountpoint, fs.Mount(mountpoint, fstype, string(dev[:]), false)
}
device, err := fs.GetDevicePath(dev)
if err != nil {
return mountpoint, err
}
if skipInotify {
time.Sleep(sleepBeforeMount)
return mountpoint, fs.Mount(mountpoint, fstype, device, false)
}
loop:
for {
select {
case ev := <-watcher.Event:
log.Debug("event: ", ev)
if ev.Name == device {
// Log when the device is discovered
log.WithFields(
log.Fields{"name": name, "event": ev},
).Info("Attach complete ")
break loop
}
case err := <-watcher.Error:
log.WithFields(
log.Fields{"name": name, "device": device, "error": err},
).Error("Hit error during watch ")
break loop
case <-time.After(devWaitTimeout):
log.WithFields(
log.Fields{"name": name, "timeout": devWaitTimeout, "device": device},
).Warning("Reached timeout while waiting for device, trying to mount anyways ")
break loop
}
}
return mountpoint, fs.Mount(mountpoint, fstype, device, isReadOnly)
}