Thanks for the hint with net-update, thats exactly that what I was looking for. Am 07.10.2013 13:10, schrieb Laine Stump: > On 10/04/2013 12:09 PM, Tim wrote: >> Hi guys, >> >> I'm running a KVM/libvirt host in a datacenter and got a fancy IPv4 >> subnet from my provider. I'm able to assign IPs from that subnet via >> dhcp to my VMs: >> >> host01 ~ # virsh net-dumpxml internet >> <network connections='3'> >> <name>internet</name> >> <uuid>37b888cc-510f-46f1-9246-346da96222ed</uuid> >> <forward dev='enp5s0f0' mode='route'> >> <interface dev='enp5s0f0'/> >> </forward> >> <bridge name='virbr1' stp='on' delay='0'/> >> <mac address='52:54:00:13:39:d5'/> >> <ip address='XX.YY.253.2' netmask='255.255.255.224'> >> <dhcp> >> <range start='XX.YY.253.4' end='XX.YY.253.30'/> >> <bootp file='pxelinux.0' server='XX.YY.99.100'/> >> </dhcp> >> </ip> >> </network> >> >> >> >> What I would like to do: >> >> 1) Right know it seems like dnsmasq assigns ip-addresses randomly to >> VMs, is there any way to assign them in ascending order? > > Whene there is no <host> entry for a particular mac address, dnsmasq > decides on the IP address to assign to each client based on some sort of > hash of the mac address (and maybe some other info). This makes it as > stable as possible without requiring user intervention. > >> >> 2) IPs are not statically assigned. Is it possible to add something like >> this automatically at the first VM-start to the xml definition?: >> <host mac='AA:BB:CC:DD:EE:FF' ip='192.168.122.2' name='foobar'/> > > That is exactly what needs to be added to the <dhcp> section of the > libvirt network *just before* starting the guest for the first time. If > you add it using "virsh net-edit", you will have to net-destroy then > net-start the network in order for it to take effect though, and that > disconnects all current guests from the network, which you certainly > don't want. > > Fortunately, in libvirt 0.10.0 and later (I think that is the version it > was added) you can use the "virsh net-update" command to add net static > host entries immediately without restarting the network; something like > this: > > virsh net-update MyGuest --live internet add \ > ip-dhcp-host "<host mac='AA:BB:CC:DD:EE:FF' ip='192.168.122.2' > name='foobar'/>" > _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
