Package: fai-server
Version: 4.3.1
Severity: important
When /usr/sbin/fai-cd is creating a bootable FAI Cd, it creates its GRUB
core.img (/boot/grub/core.img) while referencing a mangled path for the
modules. This will eventually cause a fatal GRUB error and cause the system to
drop to grub> rescue on boot since most/all of the images will not be there.
Relevant lines from /usr/sbin/fai-cd are below:
73 # - - - - - - - - - - - - - - - - - - - - - - - - - -
74 create_grub2_image() {
75
76 mkdir -p $tmp/boot/grub $NFSROOT/boot/grub
77 if [ -f $NFSROOT/boot/grub/core.img ]; then
78 cp $NFSROOT/boot/grub/core.img $tmp/boot/grub
79 MODULEBASE=$NFSROOT/usr/lib/grub/
80 elif [ -f $NFSROOT/usr/lib/grub/i386-pc/cdboot.img ]; then
81 chroot $NFSROOT /usr/bin/grub-mkimage -d /usr/lib/grub/i386-pc -o
/boot/grub/core.img biosdisk iso9660 --format=i386-pc
82 cp $NFSROOT/boot/grub/core.img $tmp/boot/grub
83 MODULEBASE=$NFSROOT/usr/lib/grub/
84 else
85 echo "no grub2 installation found in NFSROOT, using downloaded
$grubPackage"
86 apt-get -y -d install --reinstall grub-pc >/dev/null
87 grubPackage=`ls -rt /var/cache/apt/archives/grub-pc*|tail -1`
88 if [ -z "$grubPackage" ]; then
89 die 22 "Downloading grub2 failed."
90 fi
91 GRUBDIR=$tmp/grubPackage
92 mkdir -p $GRUBDIR
93 dpkg -x $grubPackage $GRUBDIR
94 cd $GRUBDIR
95 ./usr/bin/grub-mkimage -d usr/lib/grub/*-pc -o
$tmp/boot/grub/core.img biosdisk iso9660 --format=i386-pc
96 MODULEBASE=$GRUBDIR/usr/lib/grub/
97 fi
Setting MODULEBASE= with a trailing slash will cause a mangled path when
referencing it again at line 108:
108 for a in
$MODULEBASE/*-pc/{*.mod,efiemu??.o,cdboot.img,boot.img,command.lst,moddep.lst,fs.lst,handler.lst,parttool.lst};
do
For example, this line may expand to /usr/lib/grub//i386-pc/*.mod ...the
trailing slash causes the double slash and the path to not be found, which then
leads to no modules being included in the GRUB image.
Kevin Newman
Linux Systems Administrator
[cid:image001.png@01CC73B0.B05D88E0]
141 W. Jackson Blvd. Suite 500
Chicago, IL 60604
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