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grub: override GRUB_DEVICE with /dev/mapper/dmroot

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Grub scripts are very persistent in trying to use what is currently
mounted as /. Even if currently (TemplateVM) /dev/xvda3 is mounted
directly, all the configuration should use /dev/mapper/dmroot, to work
also in AppVM.
GRUB_DEVICE is used in various places as root device (including
constructing root= parameter in some versions). Force it to
/dev/mapper/dmroot

QubesOS/qubes-issues#6174
This commit is contained in:
Marek Marczykowski-Górecki 2020-11-02 04:33:56 +01:00
parent 75ffdf6a53
commit aa50b2fedc
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boot/grub.qubes
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@ -1,5 +1,6 @@
# make sure to use /dev/mapper/dmroot, not /dev/xvda directly - both have the
# same fs, including UUID
GRUB_DEVICE=/dev/mapper/dmroot
GRUB_DISABLE_LINUX_UUID=true
GRUB_DISABLE_OS_PROBER=true
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX root=/dev/mapper/dmroot console=tty0 console=hvc0"