[Spacewalk-list] Using getVar in a Snippet

[Kalchik, Jeffery]

getVar (outside of #raw/#endraw, those will prevent Cheetah/koan interpolations) I thought would retrieve any value that can be seen via 'cobbler system dumpvars -name=<client>'.

In my case, I see profile, profile_name, as well as distro and distro_name.  The kickstart can be found in the kickstart variable.  I can pull in the values:

>From a kickstart file:
# Test getVar $getVar("profile","No Profile")

>From the generated kickstart:
# Test getVar dev-rhel5

My immediate suspicion is that you have an unclosed #raw tag somewhere above.

Jeff Kalchik
Systems Engineering
Land O'Lakes

From: spacewalk-list-bounces at redhat.com [mailto:spacewalk-list-bounces at redhat.com] On Behalf Of William H. ten Bensel
Sent: Monday, March 07, 2016 5:17 PM
To: spacewalk-list at redhat.com
Subject: Re: [Spacewalk-list] Using getVar in a Snippet

Uncertain about the getVar commands.  However the ks= can be found during the kickstart in /proc/cmdline as it has the entire command line that was sent via the anaconda boot options. This would include the ks= and other variable that can be obtained as well.  ie.  ip, gateway, netmask, nameserver and any other misc custom flags (do not have to be valid boot options) for %post snippets.

So, this information could be written out to a file during the server kickstart.  There may be some better ways to do this, but using /proc/cmdline has worked for years and continues to do so in Cent/RHEL 7.x.

%post --nochroot
        cat /proc/cmdline > /mnt/sysimage/xxxx/xxxx.out

%post
        cat /proc/cmdline > /xxxx/xxxxx.out
        ksurl=`awk -F"ks=" '{print $1}'  /xxxx/xxxxx.out |awk '{print $1}'`
        ks_profile="${ksurlf##*/}"
or  if cobbler or Cheetah has issues with the above...
       ks_profile=`echo "$ksurl" |rev |cut -d"/" -f1|rev`


- Thanks and good luck





From:        Emmett Hogan <ehogan at gmail.com<mailto:ehogan at gmail.com>>
To:        spacewalk-list at redhat.com<mailto:spacewalk-list at redhat.com>
Date:        03/07/2016 04:03 PM
Subject:        [Spacewalk-list] Using getVar in a Snippet
Sent by:        spacewalk-list-bounces at redhat.com<mailto:spacewalk-list-bounces at redhat.com>
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Hi Folks,

I am trying to determine profile used to kickstart a particular machine, I have tried every version of $getVar that I can think of:

(I started with the one in an example on the https://fedorahosted.org/cobbler/wiki/KickstartSnippetswiki page)..

#set $p = $getVar('$profile')

That didn't work, so I have tried:

#set $p = $getVar('profile')
#set p = $getVar('profile', 'None')
#set p = $getVar("profile", 'None')

I noticed in the post_install_network_config snippet, they use BOTH:

#set osversion = $getVar("os_version","")

and

#set $numbondingdevs = 0

(Note the use of $ in the 2nd set command...what's the difference?)

Added #raw/#endraw ... that didn't matter.

Help...please?

Thanks in advance.

-Emmett

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