mount &chroot & grub process

[root@MisterL liveuser]# mount /dev/fedora/root /mnt/sysimage
[root@MisterL liveuser]# mount /dev/sda1 /mnt/sysimage/boot
[root@MisterL liveuser]# mount -B /dev /mnt/sysimage/dev
[root@MisterL liveuser]# mount -B /proc /mnt/sysimage/proc
[root@MisterL liveuser]# mount -B /sys /mnt/sysimage/sys
[root@MisterL liveuser]# chroot /mnt/sysimage
[root@MisterL /]# grub2-install /dev/sda
Installing for i386-pc platform.
Installation finished. No error reported.
[root@MisterL /]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
  /run/lvm/lvmetad.socket: connect failed: No such file or directory
  WARNING: Failed to connect to lvmetad. Falling back to internal scanning.
  /run/lvm/lvmetad.socket: connect failed: No such file or directory
  WARNING: Failed to connect to lvmetad. Falling back to internal scanning.
  /run/lvm/lvmetad.socket: connect failed: No such file or directory
  WARNING: Failed to connect to lvmetad. Falling back to internal scanning.
  /run/lvm/lvmetad.socket: connect failed: No such file or directory
  WARNING: Failed to connect to lvmetad. Falling back to internal scanning.
Found Windows 10 (loader) on /dev/sda1
Found Windows Recovery Environment (loader) on /dev/sda2
done