[pve-devel] new idea for vlan (with example)

Alexandre DERUMIER aderumier at odiso.com
Thu Mar 15 08:42:37 CET 2012


Hi Dietmar,
I have think yesterday about an easy implementation which doesn't break current network config and pve-manager.

I think this can work with kvm and openvz.



Simply, keep our current network configuration with bridge without vlans defined.

example :vmbr0,vmbr1

/etc/network/interface  (define bridges without vlans)
------------------------------------------------------
without bonding
---------------
auto eth0
iface eth0 inet manual
auto eth1
iface eth1 inet manual

auto vmbr0
iface vmbr0 inet manual
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

auto vmbr1
iface vmbr1 inet manual
        bridge_ports eth1
        bridge_stp off
        bridge_fd 0


with bonding
------------
auto eth0
iface eth0 inet manual
auto eth1
iface eth1 inet manual
auto eth2
iface eth1 inet manual
auto eth3
iface eth1 inet manual

auto bond0
iface bond0 inet manual
slaves eth0 eth1
bond_miimon 100
bond_mode active-backup
pre-up ifup eth0 eth1
post-down ifdown eth0 eth1

auto bond1
iface bond1 inet manual
slaves eth2 eth3
bond_miimon 100
bond_mode active-backup
pre-up ifup eth2 eth3
post-down ifdown eth2 eth3

auto vmbr0
iface vmbr0 inet manual
        bridge_ports bond0
        bridge_stp off
        bridge_fd 0

auto vmbr1
iface vmbr1 inet manual
        bridge_ports bond1
        bridge_stp off
        bridge_fd 0




then in guest network config, add an optionnal vlan option

vm network config
-----------------
bridge=vmbr0
bridge=vmbr0,vlan=2
bridge=vmbr0,vlan=3
bridge=vmbr1,vlan=3
bridge=vmbr1,vlan=5


then

dynamic bridge and vlan creation
--------------------------------
/var/lib/qemu-server/pve-bridge


if(!$vlan){
system ("/usr/sbin/brctl addif $bridge $iface") == 0 ||
    die "can't add interface to bridge\n";

}
else {
   $interface=find_interface_in_brige($bridge)
   add_bridge($bridge.'v'.$vlan);
   if($interface = bond) {
       create_bond($bond.'v'.$vlan)
       interfaces=find_interfaces_in_bond($interface)
       foreach interface{
        add_vlan_to_interface ("vconfig add interface $vlan"   #(eth0->eth0.X ,eth0-> eth1.x ))
        add_interface_to $bond.'v'.$vlan
     }

      brctl addif $bridge.'v'.$vlan $bond.'v'.$vlan

    }
    else {
       add_vlan_to_interface ("vconfig add interface $vlan")
       brctl addif $bridge.'v'.$vlan $bond
    }
 
"/usr/sbin/brctl addif $bridge.'v'.$vlan $iface "   #finaly add tap to bridge
}


without bonding
---------------
eth0 --- vmbr0 --- tap
eth1 --- vmbr1 --- tap


eth0.2 ---- vmbr0v2 --- tap
eth0.3 ---- vmbr0v3 --- tap
eth1.3 ---- vmbr1v3 --- tap
eth1.5 ---- vmbr1v5 --- tap


bonding
-------

eth0--
     |--bond0----vmbr0----tap
eth1--

eth2--
     |--bond1----vmbr0----tap
eth3--



eth0.2--
     |--bond0v2----vmbr0v2----tap
eth1.2--

eth0.3--
     |--bond0v3----vmbr0v3----tap
eth1.3--


eth2.3--
     |--bond1v3----vmbr1v3----tap
eth3.3--

eth2.5--
     |--bond1v5----vmbr1v5----tap
eth3.5--



What do you think about it ?



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