Re: Using variables in kickstart file

[Michael DeHaan <mdehaan redhat com>]

Gabrie wrote:
> On 7/18/07, Shabazian, Chip <Chip Shabazian bankofamerica com> wrote:
> > boot: yadda yadda yadda ESXIP=10.0.0.20 ESXVMOTION=10.0.2.20
> >
> > %pre (and %post if needed)
> > ESXIP=`awk -F "ESXIP=" '{print $2}' /proc/cmdline | cut -d " " -f 1`
> > ESXVMOTION=`awk -F "ESXVMOTION=" '{print $2}' /proc/cmdline | cut -d " "
> > -f 1`
> >
> > Yea, Yea, Yea, there are more elegant ways to do this, but this should
> > work for you
>
> Ok, thanks.
> But only in %pre and %post ????
>
> So this will NOT work?
>
> %pre
> ESXIP=`awk -F "ESXIP=" '{print $2}' /proc/cmdline | cut -d " " -f 1`
> ESXVMOTION=`awk -F "ESXVMOTION=" '{print $2}' /proc/cmdline | cut -d " 
> " -f 1`
>
> # Network Configurations
> network --device eth0 --bootproto static --ip $ESXIP --netmask 
> 255.255.255.0
>
>
> Or in other words.... is the network-line part of the %pre section????
>
> Gabrie
>
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%pre and %post are essentially bash shell scripts, independent of the 
other lines

Here's a clever snippet (also originated from Chip) that illustrates how 
to build part of your kickstart, on the fly, using %pre and %include...

# lots of stuff here...
# ...
# ....
%include /tmp/partinfo

%pre
# Determine how many drives we have
set \$(list-harddrives)
let numd=\$#/2
d1=\$1
d2=\$3

cat << EOF >> /tmp/partinfo
part / --fstype ext3 --size=1024 --grow --ondisk=\$d1 --asprimary
part swap --size=1024 --ondisk=\$d1 --asprimary
#EOF

In the above example, the pre script runs first, and generates a file in 
/tmp.  That file is then inserted into the kickstart, containing 
instructions for drive setup.
The same thing can be done in your case.