Re: beginner questions

On Thu, 18 Mar 2010, Jonathan Sabo wrote:

> I'm using cheetah templates in Cobbler and I'm just getting started
> with cheetah itself so please forgive my lame and hopefully not to
> annoying questions.  Cobbler comes with a dhcpd.conf template and I've
> customized it a bit but I'm not sure there isn't a cleaner way to
> write this code.  I want to allow non programmer types to add
> netblocks to this file so it can configure the dhcpd.conf file.  I'm
> curious if there are cleaner ways to write this or if this just looks
> retarded?
>
> #set $netblocks = {
> 'NYC' : {
> 'NYC_MANAGEMENT'               : { 'NETWORK' : '10.37.40.0',
> 'NETMASK' : '255.255.248.0', 'GATEWAY' : '10.37.40.1' },
> 'NYC_DMZ_MANAGEMENT'      : { 'NETWORK' : '10.37.54.0',  'NETMASK' :
> '255.255.255.0', 'GATEWAY' : '10.37.54.1' },
> 'NYC_EXT_MANAGEMENT'       : { 'NETWORK' : '10.37.72.0',  'NETMASK' :
> '255.255.248.0', 'GATEWAY' : '10.37.72.1' },
> 'TRUSTED_MANAGEMENT'       : { 'NETWORK' : '10.37.86.0',  'NETMASK' :
> '255.255.255.0', 'GATEWAY' : '10.37.86.1' },
> 'UNTRUSTED_MANAGEMENT'  : { 'NETWORK' : '10.37.200.0', 'NETMASK' :
> '255.255.248.0', 'GATEWAY' : '10.37.200.1' },
> 'DMZ_MANAGEMENT'  : { 'NETWORK' : '10.37.214.0', 'NETMASK' :
> '255.255.255.0', 'GATEWAY' : '10.37.214.1' },
> }
> }


It's probably easier to read if you iterate like this:

#for skey, blockgroup in netblocks.iteritems()
   #for nkey, block in blockgroup.iteritems()
# $skey $nkey
subnet $block['NETWORK'] netmask 
...
   #end for
#end for

The dollar signs are only required in the places I've used them and you 
can skip them elsewhere if you wish.

Nice domain name!

Tavis

> #for $skey in $netblocks.keys()
>    #for $nkey in $netblocks[skey].keys()
> # $skey $nkey
> subnet $netblocks[skey][nkey]['NETWORK'] netmask
> $netblocks[skey][nkey]['NETMASK'] {
>     option routers             $netblocks[skey][nkey]['GATEWAY'];
>     option subnet-mask         $netblocks[skey][nkey]['NETMASK'];
>     filename                   "/pxelinux.0";
>     default-lease-time         21600;
>     max-lease-time             43200;
>     next-server                $nextserver;
> }
>
>    #end for
> #end for
>
> Thanks,
>
> Jonathan
>
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------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev