Ubuntu
cloud-init package

grub-legacy-ec2 cannot be purged

Bug #749444 reported by iMac
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
cloud-init (Ubuntu)
Fix Released
Medium
Unassigned

Bug Description

Binary package hint: cloud-init

Running current Maverick-Server as a Xen pv_ops domu. Installed the grub-legacy-ec2 package, and now it cannot be purged. It does not properly account for the pv_ops kernels (detected as non-domu) so it is not much use to me to create a menu.lst for use with Debian Squeeze/6 Dom0 pygrub . It removes the diversion of /usr/sbin/grub-set-default and then trys to remove it again during the purge.. and fails. So it is stuck on my system in a "removed" state, with no dpkg --force options to purge/workaround.

The following apt/dpkg output shows a reinstall followed by remove, and purge. Note the purge fails.

root@ibm-main:/usr/sbin# apt-get install grub-legacy-ec2 --reinstall
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0B/28.4kB of archives.
After this operation, 0B of additional disk space will be used.
Preconfiguring packages ...
(Reading database ... 145664 files and directories currently installed.)
Preparing to replace grub-legacy-ec2 0.5.15-0ubuntu3 (using .../grub-legacy-ec2_0.5.15-0ubuntu3_all.deb) ...
Leaving 'diversion of /usr/sbin/grub-set-default to /usr/sbin/grub-set-default.real by grub-legacy-ec2'
Unpacking replacement grub-legacy-ec2 ...
Setting up grub-legacy-ec2 (0.5.15-0ubuntu3) ...
Searching for GRUB installation directory ... found: /boot/grub
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Ignoring non-Xen Kernel on Xen domU host: vmlinuz-2.6.35-28-server
Updating /boot/grub/menu.lst ... done

root@ibm-main:/usr/sbin# apt-get remove grub-legacy-ec2
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  grub-legacy-ec2
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 160kB disk space will be freed.
Do you want to continue [Y/n]?
(Reading database ... 145663 files and directories currently installed.)
Removing grub-legacy-ec2 ...
Removing 'diversion of /usr/sbin/grub-set-default to /usr/sbin/grub-set-default.real by grub-legacy-ec2'
root@ibm-main:/usr/sbin# apt-get remove --purge grub-legacy-ec2
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  grub-legacy-ec2*
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]?
(Reading database ... 145656 files and directories currently installed.)
Removing grub-legacy-ec2 ...
Purging configuration files for grub-legacy-ec2 ...
No diversion 'diversion of /usr/sbin/grub-set-default to /usr/sbin/grub-set-default.real by grub-legacy-ec2', none removed.
dpkg: error processing grub-legacy-ec2 (--purge):
 subprocess installed post-removal script returned error exit status 128
Errors were encountered while processing:
 grub-legacy-ec2
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@ibm-main:/usr/sbin#

root@ibm-main:/usr/sbin# dpkg -l | grep grub
ii grub-common 1.98+20100804-5ubuntu3.1 GRand Unified Bootloader, version 2 (common files)
pc grub-legacy-ec2 0.5.15-0ubuntu3 Handles update-grub for ec2 instances
ii grub-pc 1.98+20100804-5ubuntu3.1 GRand Unified Bootloader, version 2 (PC/BIOS version)
root@ibm-main:/usr/sbin#

Revision history for this message
iMac (imac-netstatz) wrote :

Not related to the bug, but I noted the option inDomU=true can be set in menu.lst, to override detection for pv_ops kernels.

Revision history for this message
iMac (imac-netstatz) wrote :

Premature comment.. ignore my last, as the option does not work as expected (menu.lst is recreated with each grub-legacy-ec2-update). Anyhow, to get this package off your system, edit the /var/lib/dpkg/info/grub-legacy-ec2.postrm script and find the following if statement,

if [ "$1" = "remove" -o "$1" = "purge" ]; then
   dpkg-divert --package grub-legacy-ec2 --remove --rename --divert \
      /usr/sbin/grub-set-default.real /usr/sbin/grub-set-default
fi

Simply change the first line,
 if [ "$1" = "remove" -o "$1" = "purge" ]; then
to
 if [ "$1" = "remove" ]; then

This removes the diversion removal step from the purge function, allowing a removal, followed by a clean purge.

#apt-get remove grub-legacy-ec2
#apt-get remove grub-legacy-ec2 --purge

..and it is gone..

root@ibm-main:/var/lib/dpkg/info# dpkg -l | grep grub
ii grub-common 1.98+20100804-5ubuntu3.1 GRand Unified Bootloader, version 2 (common files)
ii grub-pc 1.98+20100804-5ubuntu3.1 GRand Unified Bootloader, version 2 (PC/BIOS version)
root@ibm-main:/var/lib/dpkg/info#

Scott Moser (smoser)
Changed in cloud-init (Ubuntu):
importance: Undecided → Medium
status: New → Triaged
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package cloud-init - 0.6.1-0ubuntu5

---------------
cloud-init (0.6.1-0ubuntu5) natty; urgency=low

  * fix --purge of grub-legacy-ec2 package (LP: #749444)
  * catchup to trunk cloud-init (rev 394)
  * support user-data formated in dos format by converting to unix for
    user-scripts, boothooks, and upstart jobs (LP: #744965)
  * removal of some debug code, minor documentation fix
 -- Scott Moser <email address hidden> Mon, 04 Apr 2011 13:20:27 -0400

Changed in cloud-init (Ubuntu):
status: Triaged → Fix Released
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