Unattended grub configuration after kernel upgrade
- by bouke
Today I have been working on automatic deployment of an ubuntu server. I got stuck on automatic updating of the server using apt-get upgrade trying to upgrade to a new kernel. The log looks like this:
Setting up linux-image-3.2.0-24-generic (3.2.0-24.39) ...
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
(...)
Then a question is presented:
Package configuration
+---------------------------------¦ +---------------------------------+
¦ A new version of /boot/grub/menu.lst is available, but the version ¦
¦ installed currently has been locally modified. ¦
¦ ¦
¦ What would you like to do about menu.lst? ¦
¦ ¦
¦ install the package maintainer's version ¦
¦ keep the local version currently installed ¦
¦ show the differences between the versions ¦
¦ show a side-by-side difference between the versions ¦
¦ show a 3-way difference between available versions ¦
¦ do a 3-way merge between available versions (experimental) ¦
¦ start a new shell to examine the situation ¦
¦ ¦
¦ ¦
¦ <Ok> ¦
¦ ¦
+----------------------------------------------------------------------+
The desired outcome would be to select the first option and to continue:
Replacing config file /run/grub/menu.lst with new version
Updating /boot/grub/menu.lst ... done
After running the upgrade by hand, I used debconf-get-selections to inspect the correct answer for the question (see other settings). It seems like update_grub_changeprompt_threeway is the question that should be answered. However, setting this using debconf-set-selections presented me with the same question:
debconf-set-selections <<< "grub grub/update_grub_changeprompt_threeway select install_new"
apt-get -y dist-upgrade
How can this question be automated?
