Re: networking setup problem

[Uri Lublin <uril@qumranet.com>]

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
> 

Does using a different ifname help ?
PROXY:  ifname=tap2 and dmz2
WEBAPP: ifname=tap1 and dmz1
DB:     ifname=tap0 and dmz0

Also check route on guests.