Recovery Option 3 (shell):

vgscan -v --mknodes
vgchange -a y

mkdir /mnt/root
mount /dev/mapper/centos-root /mnt/root

mount -o bind /dev /mnt/root/dev
mount -o bind /sys /mnt/root/sys
mount -o bind /proc /mnt/root/proc
mount /dev/sda1 /mnt/root/boot

chroot /mnt/root

cd /boot
dracut -f
grub2-mkconfig -o /boot/grub2/grub.cfg

sh-4.2# blkid /dev/sda2
/dev/sda2: PTTYPE="dos"
sh-4.2#

# blkid /dev/sda2
/dev/sda2: UUID="owcjYz-ohz3-3obA-KaL0-wcyn-ayc5-EG1Fgc" TYPE="LVM2_member"

tune2fs /dev/sda2 -U random

[root@sys01 ~]# blkid -po udev /dev/sda2
ID_FS_UUID=owcjYz-ohz3-3obA-KaL0-wcyn-ayc5-EG1Fgc
ID_FS_UUID_ENC=owcjYz-ohz3-3obA-KaL0-wcyn-ayc5-EG1Fgc
ID_FS_VERSION=LVM2x20001
ID_FS_TYPE=LVM2_member
ID_FS_USAGE=raid
ID_PART_ENTRY_SCHEME=dos
ID_PART_ENTRY_TYPE=0x8e
ID_PART_ENTRY_NUMBER=2
ID_PART_ENTRY_OFFSET=1026048
ID_PART_ENTRY_SIZE=133191680
ID_PART_ENTRY_DISK=8:0
[root@sys01 ~]#

sh-4.2# blkid -po udev /dev/sda2
ID_PART_TABLE_TYPE=dos
ID_PART_TABLE_SCHEME=dos
ID_PART_ENTRY_TYPE=0x8e
ID_PART_ENTRY_NUMBER=2
ID_PART_ENTRY_OFFSET=1026048
ID_PART_ENTRY_SIZE=133191680
ID_PART_ENTRY_DISK=8:0
sh-4.2#