proxmox: shrink lxc container

Proxmox 4.2
Container: 101
Storage: iSCSI with group "iscsi-lvm-group"
Current size: 20G

Needed size: 10G

1. BACKUP FIRST!
2. Stop VM
   lcx-stop -n 101
3. Check disk
   e2fsck -f  /dev/iscsi-lvm-group/vm-101-disk-1
   (use tune2fs if "MMP check failed" error, and e2fsck again)
4. Do your disk little smaller that you want
   resize2fs /dev/iscsi-lvm-group/vm-101-disk-1 9G
5. Reduce LVM size to what you want
   lvreduce -L 10G /dev/iscsi-lvm-group/vm-101-disk-1
6. Resize your disk without size parameter
   resize2fs /dev/iscsi-lvm-group/vm-101-disk-1
7. Check disk
   e2fsck -f  /dev/iscsi-lvm-group/vm-101-disk-1
   (use tune2fs if "MMP check failed" error, and e2fsck again)
8. Edit disk size in container config
   vi /etc/pve/lxc/101.conf
9. Run the container