Better logging + runVM impl

vm/filemanager.go

@@ -2,7 +2,11 @@ package vm
 
 import (
 	"bytes"
+	"fmt"
+	"path/filepath"
 
+	"github.com/AlexSSD7/vldisk/utils"
+	"github.com/alessio/shellescape"
 	"github.com/pkg/errors"
 )
 
@@ -36,12 +40,12 @@ func (fm *FileManager) Init() error {
 }
 
 func (fm *FileManager) Lsblk() ([]byte, error) {
-	c, err := fm.vi.DialSSH()
+	sc, err := fm.vi.DialSSH()
 	if err != nil {
 		return nil, errors.Wrap(err, "dial vm ssh")
 	}
 
-	sess, err := c.NewSession()
+	sess, err := sc.NewSession()
 	if err != nil {
 		return nil, errors.Wrap(err, "create new vm ssh session")
 	}
@@ -57,3 +61,42 @@ func (fm *FileManager) Lsblk() ([]byte, error) {
 
 	return ret.Bytes(), nil
 }
+
+type MountOptions struct {
+	FSType string
+}
+
+func (fm *FileManager) Mount(devName string, mo MountOptions) error {
+	if devName == "" {
+		return fmt.Errorf("device name is empty")
+	}
+
+	// It does allow mapper/ prefix for mapped devices.
+	// This is to enable the support for LVM and LUKS.
+	if !utils.ValidateDevName(devName) {
+		return fmt.Errorf("bad device name")
+	}
+
+	fullDevPath := filepath.Clean("/dev/" + devName)
+
+	if mo.FSType == "" {
+		return fmt.Errorf("fs type is empty")
+	}
+
+	sc, err := fm.vi.DialSSH()
+	if err != nil {
+		return errors.Wrap(err, "dial vm ssh")
+	}
+
+	sess, err := sc.NewSession()
+	if err != nil {
+		return errors.Wrap(err, "create new vm ssh session")
+	}
+
+	err = sess.Run("mount -t " + shellescape.Quote(mo.FSType) + " " + shellescape.Quote(fullDevPath) + " /mnt")
+	if err != nil {
+		return errors.Wrap(err, "run mount cmd")
+	}
+
+	return nil
+}