Problem modifying the liveuser group membership in a spin based on other spins

[William Cohen]

I am working on building a live image for systemtap.  I was hoping to leverage as much
from the the existing fedora-livecd-desktop.ks file using the %include and just have the
additional systemtap related stuff in the file. One of the things I would like to do is
add some groups to the live user using the following in my kickstart file:

%post
# add fedora user to SystemTap groups
usermod -a -G stapusr,stapdev liveuser
%end

However, I get a message it can't find the usermod command:

/tmp/ks-script-6n4lG0: line 3: usermod: command not found
ignoring %post failure (code 127)

Attached is the fedora-live-stap2.ks that demonstrates the problem.  The kickstart file is
in /usr/share/spin-kickstarts.  Attempt to create the live iso with:


setenforce 0
livecd-creator -v --cache=`pwd`/cache -t `pwd`/tmp \
--releasever=16 --config=/usr/share/spin-kickstarts/fedora-live-stap2.ks \
--logfile=usermod_prob.log \
--fslabel=Fedora-16-x86_64-Live-stap2 >& output-20120109a.log

Image is bootable, but the liveuser is not a member of stapusr or stapdev.  Is there some
way to get the usermod command to work in this kickstart file? Putting a usermod command
right after the useradd in fedora-live-base.ks works, but it would be nice to be able to
use the stock fedora-live-base.ks.

-Will

[Brian C. Lane]

On Mon, Jan 09, 2012 at 10:51:45AM -0500, William Cohen wrote:
>  I am working on building a live image for systemtap.  I was hoping to
> leverage as much from the the existing fedora-livecd-desktop.ks file using the %include
> and just have the additional systemtap related stuff in the file. One of the things I
> would like to do is add some groups to the live user using the following in my kickstart
> file:
>   
I'm not sure why you're getting that error, but it still wouldn't work.
The liveuser user isn't created until the system boots so you need to
put your usermod after the useradd in the livesys script.

-- 
Brian C. Lane | Anaconda Team | IRC: bcl #anaconda | Port Orchard, WA (PST8PDT)

[William Cohen]

On 01/09/2012 07:45 PM, Brian C. Lane wrote:
>  On Mon, Jan 09, 2012 at 10:51:45AM -0500, William Cohen wrote:
> > I am working on building a live image for systemtap.  I was hoping to leverage as
> much from the the existing fedora-livecd-desktop.ks file using the %include and just have
> the additional systemtap related stuff in the file. One of the things I would like to do
> is add some groups to the live user using the following in my kickstart file:
> >
>  
>  I'm not sure why you're getting that error, but it still wouldn't work.
>  The liveuser user isn't created until the system boots so you need to
>  put your usermod after the useradd in the livesys script. 
I ended up taking that approach of putting the usermod command right after the useradd in
fedora-live-base.ks for the time being.  However, with your explanation above I understand
better when liveuser is created. The /etc/rc.d/init.d/livesys does the useradd when the
machine starts up. So should be able to do something like the following in
fedora-live-stap.ks to add the command and reuse the existing .ks files:

%post
cat >> /etc/rc.d/init.d/livesys << EOF
# add fedora user to SystemTap groups
usermod -a -G stapusr,stapdev liveuser
FOE
%end


How does one get ks spin files included in the spin-kickstarts rpm?

-Will