networking setup problem

[paolo pedaletti <paolo.pedaletti@gmail.com>]

Hi,
I hope this is the right ml to submit my problem.

Abstract: I can't setup 2 different network inside my VMs, one public 
and one private.

Scheme:

       eth0 ---------
  ---------| proxy |---eth1
  |        ---------  |
H|                   |
O|   eth0 ---------  |
S|--------| web   |--|eth1
T|        ---------  |
  |                   |
  |   eth0 ---------  |
  |--------| db    |---eth1
           ---------


this is a "classic" LAMP, sparse on 3 VM

1) front end, proxy (apache2 in reverse with mod-security)
2) application server, web (apache2 + php5)
3) database (mysql5)

(it's a test/backup environment)

each VM must have 2 network card:
eth0 on the local network, in bridge with the host physical eth0
eth1 on the virtual private network, for internal communications between 
them

saying that, ... it doesn't work :-(
(linux ubuntu 8.04 2.6.24-19-generic, kvm-62)

these are the command lines:

kvm -name PROXY
-net nic,vlan=0,macaddr=00:18:BE:EF:17:2A,model=rtl8139
	-net tap,vlan=0,ifname=tap0,script=./qemu-ifup.sh
-net nic,vlan=1,macaddr=00:18:BE:EF:17:2B,model=rtl8139
	-net user,vlan=1,ifname=dmz0,script=./qemu-ifup.sh
-drive index=0,media=disk,if=scsi,file=./ubuntu-server.PROXY.root,boot=on
-drive index=1,media=disk,if=scsi,file=./ubuntu-server.PROXY.home
-drive index=2,media=disk,if=scsi,file=./ubuntu-server.PROXY.swap

kvm -name WEBAPP
-net nic,vlan=0,macaddr=00:18:BE:EF:17:1A,model=rtl8139
	-net tap,vlan=0,ifname=tap0,script=./qemu-ifup.sh
-net nic,vlan=1,macaddr=00:18:BE:EF:17:1B,model=rtl8139
	-net user,vlan=1,ifname=dmz0,script=./qemu-ifup.sh
-drive index=0,media=disk,if=scsi,file=./ubuntu-server.WEB.root,boot=on
-drive index=1,media=disk,if=scsi,file=./ubuntu-server.WEB.home
-drive index=2,media=disk,if=scsi,file=./ubuntu-server.WEB.swap

kvm -name DB
-net nic,vlan=0,macaddr=00:18:BE:EF:17:0A,model=rtl8139
	-net tap,vlan=0,ifname=tap0,script=./qemu-ifup.sh
-net nic,vlan=1,macaddr=00:18:BE:EF:17:0B,model=rtl8139
	-net user,vlan=1,ifname=dmz0,script=./qemu-ifup.sh
-drive index=0,media=disk,if=scsi,file=./ubuntu-server.DB.root,boot=on
-drive index=1,media=disk,if=scsi,file=./ubuntu-server.DB.home
-drive index=2,media=disk,if=scsi,file=./ubuntu-server.DB.swap


$ cat /etc/qemu-ifup
-----------------8<-----------------8<----------------8<--------------
#!/bin/sh
set -x

echo "Executing $0"

case $1 in
	tap*)	echo "tun network"
  	BRIDGE=br0
	if [ -z "$(ifconfig $BRIDGE)" ] ; then
		/usr/sbin/brctl addbr $BRIDGE
		dhclient $BRIDGE
	fi
	/usr/sbin/tunctl -u `whoami` -t $1
	echo "Bringing up $1 for bridged mode..."
	/sbin/ifconfig $1 0.0.0.0 promisc up
	/sbin/ip link set $1 up
	sleep 0.5s
	echo "Adding $1 to br0..."
	/usr/sbin/brctl addif $BRIDGE $1
	;;

	dmz*)	echo "dmz network"
  	BRIDGE=br1
	if [ -z "$(ifconfig $BRIDGE)" ] ; then
		/usr/sbin/brctl addbr $BRIDGE
		dhclient $BRIDGE
	fi
	/usr/sbin/tunctl -u `whoami` -t $1
	echo "Bringing up $1 for bridged mode..."
	/sbin/ifconfig $1 0.0.0.0 promisc up
	/sbin/ip link set $1 up
	sleep 0.5s
	echo "Adding $1 to $BRIDGE..."
	/usr/sbin/brctl addif $BRIDGE $1
	;;

	*)   echo "Error: no interface specified or interface '$1' invalid"
         exit 1
esac
-----------------8<-----------------8<----------------8<--------------



eth0 works for all the VM, eth1 doesn't.

constrain: no dhcp, all static ip

any suggestion?

thank you in advance.

-- 
Paolo Pedaletti