Hello everyone. I've been trying to understand what is going on when we try to build HVM Wheezy image using GRUB 1.99 on GRUB 1.99. The host is run from /dev/xvda (PVM with pvgrub). It contains following entries in /boot/grub/device.map (hd0) /dev/xvda (hd1) /dev/xvdf IMO it is left-over from creation of AMI; xvda is from host, xvdf is from AMI - and now what was xvdf during AMI creation is xvda when this AMI is run. Target (chroot) contains following entries in device.map (hd0) /dev/xvdf (hd0,msdos1) /dev/mapper/xvdf1 This might be the first source of problems; when I run grub-install with --recheck, it created device.map like in the first case (in host). /dev/mapper/xvdf1 points to /dev/dm-0. It points to it from the very beginning, it is set by kpartx -as Neither link_fn() nor unlink_fn() from common.tasks.boot.InstallGrub are called. Similarly, neither _before_link_dm_node nor _before_unlink_dm_node from base.fs.volume.Volume are called. /etc/fstab on target contains UUID, not /dev/mapper/xvdf1 for root partition. I've tried changing that, but it did not help. From my point of view, this is rather messy. * we have target / mounted to /dev/mapper/xvdf1, while there exists /dev/xvdf1. * /etc/fstab uses UUID * grub-install is called with /dev/xvdf * but later grub puts UUIDs into grub.cfg in root=* OTOH setting DISABLE_LINUX_UUID in grub configuration does not change anything. I've found GRUB bug related to UUIDs but I am not sure whether it is related to our case or not: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=741342 I also tried fix proposed in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=544577#10 but it didn't help. Currently I feel lost with all of this. Maybe time will help - it looks like GRUB from Jessie does not have those problems ;-). OTOH now Debian stable cannot be run on the new cheep (or free) machines like t2 which use HVM. Best regards. -- Tomasz Rybak GPG/PGP key ID: 2AD5 9860 Fingerprint A481 824E 7DD3 9C0E C40A 488E C654 FB33 2AD5 9860 http://member.acm.org/~tomaszrybak
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