diskimage-builder

VM element: /usr/sbin/grub2-install: error: will not proceed with blocklists.

Bug #1461984 reported by Lucas Alvares Gomes
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
diskimage-builder
New
Undecided
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Bug Description

Building an image on a Fedora 22 host, when installing the GRUB2 bootloader I see:

+ /usr/sbin/grub2-install '--modules=biosdisk part_msdos' /dev/loop0
Installing for i386-pc platform.
/usr/sbin/grub2-install: warning: this msdos-style partition label has no post-MBR gap; embedding won't be possible.
/usr/sbin/grub2-install: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged..
/usr/sbin/grub2-install: error: will not proceed with blocklists.
/dev/loop0: [0039]:311600 (/tmp/image.uAvRGGAK/image.raw)

Workaround:

export DIB_EXTLINUX=1 so the VM element will install syslinux instead of GRUB.

Another workaround (not tested):

Apparently you can --force the grub-install command to avoid that error[1]

[1] https://wiki.archlinux.org/index.php/GRUB#Install_to_partition_or_partitionless_disk

James Slagle (james-slagle)
Changed in tripleo:
status: New → Triaged
Revision history for this message
Dan Prince (dan-prince) wrote :

The --force option works so I'd say lets perhaps just go with that for now.

Revision history for this message
Dan Prince (dan-prince) wrote :

Okay. I see. So if we use --force we'll actually be making so that subsequent updates to the core.img file potentially hose thinks. So we'd want to make it immutable to prevent that with this work around.

Revision history for this message
Dan Prince (dan-prince) wrote :

Perhaps also related I see this in the seed build logs on F22:

+ sudo sfdisk /dev/loop0
Re-reading the partition table failed.: Invalid argument
+ sudo partprobe /dev/loop0

Dan Prince (dan-prince)
Changed in tripleo:
importance: Undecided → High
Revision history for this message
Ben Nemec (bnemec) wrote :

I'm not sure if this is still valid, but it was a problem in dib which is no longer part of tripleo.

no longer affects: tripleo
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