CentOS 7 Cloned VM Cannot Boot

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Yes, that was it!

The VM booted fine after /etc/fstab update!

Case closed. It was a tricky one!

Thank you all for your feedback and kind assistance!

Cheers, Nick

One thought on - CentOS 7 Cloned VM Cannot Boot

  • I did another test, which was also successful.

    Below follows the output from the process (after booting in troubleshooting mode using the CentOS 7 media disk):

    1) Continue

    2) Read-only mount

    3) Skip to shell

    4) Quit (Reboot)

    Please make a selection from the above: 1
    Rescue Mount

    Your system has been mounted under /mmt/sysimage.

    If you would like to make your system the root environment, run the

    chroot /mnt/sysimage
    Please press to get a shell.
    When finished, please exit from the shell and your system will reboot.
    sh-4.2# umount /dev/vda1
    sh-4.2# xfs_admin -U restore /dev/vda1
    Clearing log and setting UUID
    writing all SBs
    new UUID = b05227b2-7c86-4ccf-81ff-204a9a80f789
    sh-4.2# mount /dev/vda1 /mmt/sysimage/boot
    sh-4.2# chroot /mnt/sysimage
    bash-4.2# grub2-install /dev/vda
    Installing for i386-pc platform.
    Installation finished. No error reported.
    bash-4.2# nano /etc/fstab
    bash-4.2# exit

    Note also that after logging into the (finally bootable) OS, we should follow the directions: “Resetting and Reinstalling GRUB 2”.


    Best regards, Nick