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Voici les etapes a suivre pour configurer une machine HOST avec 2 VMs GUEST en utilisant ubuntu 11.10 et kvm en mode route.
Modifiez votre /etc/network/interfaces
Configurez l’ip physique de la machine et creez des bridge. Le plus important est la derniere ligne, vous devez activez le proxy_arp sur votre interface physique. Cela permet a la machine HOST de repondre au ARP request venant du reseau pour les VMs (donc seulement la mac physique est annoncee et ce pour l’IP HOST et les IPs des VMs).
# The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address IP_HOST_FIXME netmask 255.255.255.0 network NETWORK_FIXME broadcast BROADCAST_FIXME gateway GATEWAY_FIXME # create dummy interfaces up /sbin/ifconfig dummy0 up up /sbin/ifconfig dummy1 up # create the bridges up /sbin/brctl addbr bridge0 up /sbin/brctl addbr bridge1 # add the interfaces to the bridges up /sbin/brctl addif bridge0 dummy0 up /sbin/brctl addif bridge1 dummy1 # bringup the bridges up /sbin/ifconfig bridge0 up up /sbin/ifconfig bridge1 up # add the routes up /sbin/route add IP_VM_1_FIXME dev bridge0 up /sbin/route add IP_VM_2_FIXME dev bridge1 # the most important! up /sbin/sysctl -w net.ipv4.conf.eth0.proxy_arp=1
Download this code: interfaces.txt
Je pense qu’il doit etre possible de n’utiliser qu’un bridge, mais je n’ai pas tente.
Activez IP forwarding
Editez /etc/sysctl.conf et modifiez la ligne
# Uncomment the next line to enable packet forwarding for IPv4
net.ipv4.ip_forward=1
Creez la configuration virsh pour vos VM
Creez un fichier xml comme le suivant:
<domain type='kvm'> <name>ubuntu</name> <memory>8388608</memory> <currentMemory>8388608</currentMemory> <vcpu>4</vcpu> <os> <type arch='x86_64' machine='pc-0.14'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/srv/ubuntu.qcow2'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='FIXME_MAC_GENERATED'/> <source bridge='bridge0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> </domain>
Download this code: ubuntu.xml
Importez la configuration de votre VM
# virsh define foo.xml
# virsh start ubuntu
Modifiez le /etc/network/interfaces de vos VMs
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address IP_VM1_FIXME
netmask 255.255.255.255
up /sbin/route add IP_HOST_FIXME dev eth0
up /sbin/route add default gw IP_HOST_FIXME
Download this code: interfaces-vm.txt
Voila les grandes lignes, en esperant que cela aide quelques personnes.
]]>So here it is:
#!/usr/bin/perl use strict; use Time::ParseDate; use Time::Local; sub convert_week_to_date { my ($year, $week) = @_; my $ref = timelocal(0, 0, 0, 1, 0, $year); my ($s, $m, $h, $dom, $m, $y, $wd, $yd, $i) = localtime($ref); my $time = parsedate("+".$week." weeks", NOW => $ref); my ($s, $m, $h, $dom, $m, $y, $wd, $yd, $i) = localtime($time); $wd -= 1; my $time = parsedate("-".$wd." days", NOW => $time); my ($s, $m, $h, $dom, $m, $y, $wd, $yd, $i) = localtime($time); return (sprintf("%04d/%02d/%02d", $y + 1900, $m + 1, $dom - $wd + 1)); } print convert_week_to_date(2009, 1)."\\n"; print convert_week_to_date(2009, 52)."\\n"; print convert_week_to_date(2010, 1)."\\n"; print convert_week_to_date(2010, 22)."\\n"; print convert_week_to_date(2010, 23)."\\n"; print convert_week_to_date(2010, 24)."\\n";
Download this code: convert_week_to_date.pl
Hopefully it will help someone one day.
]]>Sunday Morning in San Francisco from Samuel Pasquier on Vimeo.
Music:
“U TERU S . Birth of Souls” by Loveshadow
http://ccmixter.org/files/Loveshadow/23570
Video: Samuel Pasquier
2700 images taken from from 9h to 12h
42th floor of the mandarin oriental hotel
He is writing about a lot of interesting topics related to software engineering.
My favorite column from his blog:
]]>
Strawberry’s experimentation
]]>To do is to be
To be is to do
– I. Kant
]]>Do be do be do