Thank you Linda,
That helps me a lot.
For now, i can make use of your tip to setup my custom URL,if needed. I
will take a look at the code, if i need more customization later.
For now, i have used pkgdir and otherpkgdir from osimage definition table
to deploy the node.
On xCAT 2.8.4.1
Everything works good, except one piece :
Centos Base repo doesnt get replaced to the local repository in the xCAT
server.
According to ospkgs postscript - i suppose the expected behavior is that,
it replaces the default Centos Base repo's ( which point to the centos
repos on the web), to the local repository on xCAT ( or pkgdir path).
This expected behavior happens with the otherpkgs postscript, that runs
after boot.
I had to use sync files, to sync the Centos Base repo after boot. But this
defeats the purpose of OS image definition, or tables.
I expected that xCAT should have replaced the base repo's, but i am not
sure if something has changed.
I have not explicitly mentioned any postscripts as of now, and i suppose i
do not need to.
Please advice.
Thank you,
Lohit
On Tue, Jun 17, 2014 at 5:24 PM, Linda Mellor <[email protected]> wrote:
> Lohit,
> Good to hear that you have upgraded to xCAT 2.8.4. As you have probably
> noticed, xCAT has made MANY changes since 2.3, including the use of osimage
> definitions to help better customize your os images and manage your node
> provisioning.
>
> There are details in this doc that may be of use to you in this regard:
>
> http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Convert_Non-osimage_Based_System_To_Osimage_Based_System
>
> And, since we have also changed our template files over time, you may want
> to start fresh with a new copy of one of our shipped templates and reapply
> updates (or at least diff and look at some of the changes that may have
> been made over the years).
>
> To answer your original question, xCAT does some limited substitution to
> the entire template file and its includes when you run nodeset for your
> node. (if you enjoy reading our code, it is handled by
> /opt/xcat/lib/perl/xCAT/Template.pm subvars). We do NOT have generic
> variable substitution handling in these files. It is limited to table
> substitutions and a few other key data values for xCAT's use.
> Are you now getting the URL value you need? If not, can you tell me what
> you would like your final URL value to be?
>
> Just FYI, the table substitution does not handle nesting, so you are
> limited to direct table references. The code explicitly searches for the
> string '$NODE' as a table key, so even though it may look like variable
> substitution, that is the only "variable" we substitute. HOWEVER (and I
> probably shouldn't say this because it is a real hack, is not supported,
> and will break if we ever change how we do this code), you might be able to
> exploit the current perl string processing in subvars to get one level of
> nesting by using #TABLEBLANKOKAY:xx# for the outer table reference and
> #TABLE:yy# for the inner reference, something like this:
>
> url --url
>
> *http://#TABLE:noderes:$NODE:nfsserver#/#TABLEBLANKOKAY:linuximage:imagename=#TABLE:nodetype:$NODE:provmethod#:pkgdir#*
>
> <http://#TABLE:noderes:$NODE:nfsserver%23/%23TABLE:linuximage:%5C%23TABLE:nodetype:$NODE:provmethod%23%5C:pkgdir%23>
>
>
>
> Linda
>
>
> [image: Inactive hide details for Lohit Valleru ---06/17/2014 01:43:55
> PM---Thank you Lissa, The templates that we were using were carr]Lohit
> Valleru ---06/17/2014 01:43:55 PM---Thank you Lissa, The templates that we
> were using were carried on from 2.3 to 2.8 and
>
>
> From: Lohit Valleru <[email protected]>
> To: xCAT Users Mailing list <[email protected]>
> Date: 06/17/2014 01:43 PM
>
> Subject: Re: [xcat-user] xCAT variables during OS install
> ------------------------------
>
>
>
> Thank you Lissa,
>
> The templates that we were using were carried on from 2.3 to 2.8 and
> 2.8.4.1.
>
> I understand that i can modify the mypostscript template, to use the
> variables for postscript or post-kickstart installation. ( after initial
> kickstart installation, and not postboot installation)
>
> Are you trying to say, that the mypostscript variables can be used even
> before the post-kickstart session? ( that is during the period where :
> --url is read by the anaconda installer)
>
> Please advice.
>
> Thank you,
>
> Lohit
>
>
> On Tue, Jun 17, 2014 at 7:14 AM, Lissa Valletta <*[email protected]*
> <[email protected]>> wrote:
>
> Did you mean you were running 2.3 or 2.8.3 xCAT release previously.
> In any case, you can customize your postscript template. Please read this
> documentation.
>
>
> *https://sourceforge.net/apps/mediawiki/xcat/index.php?title=Postscripts_and_Prescripts*
>
> <https://sourceforge.net/apps/mediawiki/xcat/index.php?title=Postscripts_and_Prescripts>
>
>
>
> But for a non-node key'd table, I think your only option is
> tabdump(linuximage)
>
> Lissa K. Valletta
> 8-3/B10
> Poughkeepsie, NY 12601
> (tie 293) 433-3102
>
>
>
> [image: Inactive hide details for Lohit Valleru ---06/16/2014 06:31:53
> PM---I found a solution to the above issue. We had been updating]Lohit
> Valleru ---06/16/2014 06:31:53 PM---I found a solution to the above issue.
> We had been updating xCAT from 2.3 version, and copying the t
>
> From: Lohit Valleru <*[email protected]* <[email protected]>>
> To: xCAT Users Mailing list <*[email protected]*
> <[email protected]>>,
> Date: 06/16/2014 06:31 PM
> Subject: Re: [xcat-user] xCAT variables during OS install
> ------------------------------
>
>
>
>
> I found a solution to the above issue.
>
> We had been updating xCAT from 2.3 version, and copying the templates
> from one version to other.
>
> After I removed the URL from the template, i observed that xCAT
> automatically populated the same from OSimage table.
>
> However, it would be good to know, how do we export xCAT variables
> before the postscript section.
>
>
> On Mon, Jun 16, 2014 at 4:57 PM, Lohit Valleru <*[email protected]*
> <[email protected]>> wrote:
> Hi all,
>
> I am currently using xCAT 2.8.4.1.
>
> I understand that xCAT variables could be used during post script
> installation, by editing the postscript template that xCAT has provided.
>
> However, i would like to use few variables before postscript
> installation :
>
> For example, the following table variable, helps receive the nfs
> server information:
>
> #TABLE:noderes:$NODE:nfsserver#
>
> Is there anyway i could receive the linux image table information
> in the same way?
>
> I am trying to customize and automate the osimage directories to
> custom directories instead of xCAT default.
>
> Since linux image table does not have $NODE vause
> I have tried to use
>
> url --url
>
> *http://#TABLE:noderes:$NODE:nfsserver#/#TABLE:linuximage:\#TABLE:nodetype:$NODE:provmethod#\:pkgdir#*
>
> <http://#TABLE:noderes:$NODE:nfsserver%23/%23TABLE:linuximage:%5C%23TABLE:nodetype:$NODE:provmethod%23%5C:pkgdir%23>
>
> or
>
> PROVMETHOD=#TABLE:nodetype:$NODE:provmethod#
>
> PKGDIR=#TABLE:linuximage:$PROVMETHOD:pkgdir#
>
> url --url *http://#TABLE:noderes:$NODE:nfsserver#/$PKGDIR*
> <http://#TABLE:noderes:$NODE:nfsserver%23/$PKGDIR>
>
> I need to find a way to nest the table variables or assign the
> table value to a variable and use them later.
>
> Else, i would be happy to know - how does xCAT populate $NODE, and
> if i could populate other variables in a similar way.
>
> Please do let me know, if anyone has tried doing the above.
>
> Thank you,
>
> Lohit
>
>
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