luks не грузится система

 fdisk dev/sda
 n создал загрузочный сда1 300мб
 n создал сда2 оставшееся место
 t назначил 8е второму

 cryptsetup luksFormat -c aes-xfs-plain64:sha512 -h sha512 -s 512 /dev/sda2 
 cryptsetup luksOpen /dev/sda2 sda2-crypt
 pvcreate /dev/mapper/sda2-crypt
 vgcreate lubuntu /dev/mapper/sda2-crypt
 lvcreate -C y -L 4G -n swap lubuntu
 lvcreate -C n -l 100%FREE -n root lubuntu

 Установил, назначив в установщике разделы.
 Далее не перезагружая.
 ls /dev/mapper/ вывел мне:
 control sda2-crypt lubuntu-root lubuntu-swap

 mount /dev/mapper/lubuntu-root /mnt
 mount /dev/sda1/ /mnt/boot/
 cd /mnt

 mount --rbind /dev dev
 mount --rbind /sys sys
 mount --rbind /run run
 mount --bind /proc proc
 chroot . /bin/bash -l

 vi /etc/crypttab 
 вставил: 
 sda2-crypt UUID(sda2) none luks,discard
 :qw

 update-initramfs -u
 grub-install --recheck /dev/sda   no errors
 grub-mkconfig -o /boot/grub/grub.cfg
 umount -l /mnt
 sync
 exit

 Перезагрузился
 ALERT! /dev/mapper/lubuntu-root does not exist. Drop to a shell

 
pvdisplay
  --- Physical volume ---
  PV Name               /dev/mapper/luks-21506278-1dcd-41e7-911b-3b0dd32c60b2
  VG Name               lubuntu
  PV Size               55.58 GiB / not usable 2.90 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              14229
  Free PE               0
  Allocated PE          14229
  PV UUID               QLTShd-KStv-KeYI-jlhW-eIPK-TTYH-cbKcs9

vgdisplay
  --- Volume group ---
  VG Name               lubuntu
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               55.58 GiB
  PE Size               4.00 MiB
  Total PE              14229
  Alloc PE / Size       14229 / 55.58 GiB
  Free  PE / Size       0 / 0   
  VG UUID               uz5eiI-dQcT-qaxf-ZM3y-Q19k-Awq4-b37z9T

lvdisplay
  --- Logical volume ---
  LV Path                /dev/lubuntu/swap
  LV Name                swap
  VG Name                lubuntu
  LV UUID                a5QjrG-7NOv-sh1d-rHGo-fpk3-W992-vbgvv0
  LV Write Access        read/write
  LV Creation host, time lubuntu, 2017-04-24 21:32:22 +0000
  LV Status              available
  # open                 0
  LV Size                4.00 GiB
  Current LE             1024
  Segments               1
  Allocation             contiguous
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1
   
  --- Logical volume ---
  LV Path                /dev/lubuntu/root
  LV Name                root
  VG Name                lubuntu
  LV UUID                K3DkG0-DppW-Qiob-Kalp-hT5L-h77c-5MQdMj
  LV Write Access        read/write
  LV Creation host, time lubuntu, 2017-04-24 21:33:27 +0000
  LV Status              available
  # open                 0
  LV Size                51.58 GiB
  Current LE             13205
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:2

blkid
/dev/sda1: UUID="60CC5B4023931FCD" TYPE="ntfs" PARTUUID="00068903-01"
/dev/sdb1: UUID="7d434943-b03b-4fca-9ee2-b91fbd2ac53e" TYPE="ext2" PARTUUID="0975154e-01"
/dev/sdc1: UUID="14A0-1FA5" TYPE="vfat" PARTUUID="53d8535d-01"
/dev/loop0: TYPE="squashfs"
/dev/sdb2: UUID="21506278-1dcd-41e7-911b-3b0dd32c60b2" TYPE="crypto_LUKS" PARTUUID="0975154e-02"
/dev/zram0: UUID="501f5c11-2d23-4c27-8480-47a8ba39a4e4" TYPE="swap"
/dev/zram1: UUID="173e0589-4d3f-4ddb-ba31-1f68a881a311" TYPE="swap"
/dev/zram2: UUID="21bd81c7-b851-43e0-9de8-45dd306d0755" TYPE="swap"
/dev/zram3: UUID="17484a48-7dc6-43d4-bcbb-ae210d087419" TYPE="swap"
/dev/mapper/luks-21506278-1dcd-41e7-911b-3b0dd32c60b2: UUID="QLTShd-KStv-KeYI-jlhW-eIPK-TTYH-cbKcs9" TYPE="LVM2_member"
/dev/mapper/lubuntu-swap: UUID="95fbb729-6ca7-40f1-8471-ecb4b0bcd252" TYPE="swap"
/dev/mapper/lubuntu-root: UUID="d5ea1512-76af-413e-8077-e0c847a955ad" TYPE="ext4

содержимое crypttab
sda2-crypt	UUID=21506278-1dcd-41e7-911b-3b0dd32c60b2	none	luks,discard

содержимое fstab
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/lubuntu-root /               ext4    errors=remount-ro 0       1
# /boot was on /dev/sda1 during installation
UUID=7d434943-b03b-4fca-9ee2-b91fbd2ac53e /boot           ext2    defaults        0       2
/dev/mapper/lubuntu-swap none            swap    sw              0       0