[PATCH] make kvm service script use dhclient config

[PATCH] make kvm service script use dhclient config

[Ferry Huberts]

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Hi list,

in order to make the kvm service script work with DHCP on FC6 I had to 
apply the following patch. Hope it's useful :-)


Ferry



--- kvm 2007-06-07 17:13:47.000000000 +0200
+++ /etc/init.d/kvm     2007-07-05 21:06:43.000000000 +0200
@@ -132,7 +132,7 @@
            pgrep dhclient >/dev/null 2>&1 || i=4
            sleep 1
        done
-        dhclient ${dst} >/dev/null 2>&1
+        dhclient -cf /etc/dhclient-${pif}.conf ${dst} >/dev/null 2>&1
     else
         get_ip_info ${src}
         ifconfig ${src} 0.0.0.0


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--- kvm 2007-06-07 17:13:47.000000000 +0200
+++ /etc/init.d/kvm     2007-07-05 21:06:43.000000000 +0200
@@ -132,7 +132,7 @@
            pgrep dhclient >/dev/null 2>&1 || i=4
            sleep 1
        done
-        dhclient ${dst} >/dev/null 2>&1
+        dhclient -cf /etc/dhclient-${pif}.conf ${dst} >/dev/null 2>&1
     else
         get_ip_info ${src}
         ifconfig ${src} 0.0.0.0

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Re: [PATCH] make kvm service script use dhclient config

[Dor Laor]

>Hi list,
>
>in order to make the kvm service script work with DHCP on FC6 I had to
>apply the following patch. Hope it's useful :-)
>
>
>Ferry
>
>
>
>--- kvm 2007-06-07 17:13:47.000000000 +0200
>+++ /etc/init.d/kvm     2007-07-05 21:06:43.000000000 +0200
>@@ -132,7 +132,7 @@
>            pgrep dhclient >/dev/null 2>&1 || i=4
>            sleep 1
>        done
>-        dhclient ${dst} >/dev/null 2>&1
>+        dhclient -cf /etc/dhclient-${pif}.conf ${dst} >/dev/null 2>&1
>     else
>         get_ip_info ${src}
>         ifconfig ${src} 0.0.0.0

I didn't see any /etc/dhclient-* files in my FC6.
What the problem are you solving?
I know there is a problem (don't rememeber the distribution) that when
you run dhclient, 
it runs both on the bridge and on the physical interface. It that it?

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Re: [PATCH] make kvm service script use dhclient config

[Ferry Huberts]

Dor Laor wrote:
>> Hi list,
>>
>> in order to make the kvm service script work with DHCP on FC6 I had to
>> apply the following patch. Hope it's useful :-)
>>
>>
>> Ferry
>>
>>
>>
>> --- kvm 2007-06-07 17:13:47.000000000 +0200
>> +++ /etc/init.d/kvm     2007-07-05 21:06:43.000000000 +0200
>> @@ -132,7 +132,7 @@
>>            pgrep dhclient >/dev/null 2>&1 || i=4
>>            sleep 1
>>        done
>> -        dhclient ${dst} >/dev/null 2>&1
>> +        dhclient -cf /etc/dhclient-${pif}.conf ${dst} >/dev/null 2>&1
>>     else
>>         get_ip_info ${src}
>>         ifconfig ${src} 0.0.0.0
>>     
>
> I didn't see any /etc/dhclient-* files in my FC6.
> What the problem are you solving?
> I know there is a problem (don't rememeber the distribution) that when
> you run dhclient, 
> it runs both on the bridge and on the physical interface. It that it?
>
>   
in my setup the dhcp client would run only on the kvm bridge and the
hostname as I set up for the original network interface would not get
sent to the dhcp server and would thus not land in my dns server. maybe
this is a bit of a shortcut but the bridge must in some way use the same
dhcp configuration as for the 'pif' it is replacing I think.

as far as i now, the /etc/dhclient-* files are generated when you have
the DHCP_HOSTNAME variable set in /etc/sysconfig/network-script/ifcfg-*,
so maybe I should first check for presence of the file before using
it.... but it work for me :-)

about running the dhcp client twice...
I think I've seen this happen but am not really sure. at the time I
thought that the dhcp client didn't get properly shutdown/killed by the
kvm script. the script needs to find the correct dhcp client (the one
that is running of the 'pif') and shutdown that client. maybe this fails?

hope this clarifies things



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