Comment 4 for bug 1485685

At the root of this issue is ucf. The ucfr command will store a path that contains symlinks during insertion but will only match the symlink-resolved path when attempting removal. Cloud image builds modify grub's menu.lst but have attempted to purge the ufc registry entry. This bug in ucf causes the registry removal to fail.

This was partially fixed upstream in 3.0028[1] so that future additions to the registry would be symlink-resolved as well; however it does not address upgrade such that the user still can not remove an entry containing a symlink.

For our current cloud image users, we can ensure the entry is properly removed during image creation for new images, ideally with a fixed ucf package that benefits everyone, but for images in the field the user would need to remove the registry entry[2] and this is a manual edit of the registry file without further patches to upstream ucf.

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=724457
[2] sed -i -r "/grub[[:space:]]+\/var\/run\/grub\/menu\.lst/d" /var/lib/ucf/registry