paolo pedaletti wrote:
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?
AFAIK, -net user does not need an ifname or script argument - there's no host
interface for the user mode stack. Try these:
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
-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
-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
-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
--
David.
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