[libvirt-users] libvirt/dnsmasq is not adhering to static DHCP assignments
Given the following network configuration: =========== <network> <name>osc_mgmt</name> <uuid>d93fe709-14ae-4a0e-8989-aeaa8c76c513</uuid> <forward mode='route'/> <bridge name='osc_mgmt' stp='on' delay='0'/> <mac address='52:54:00:3f:fe:10'/> <ip address='192.168.80.254' netmask='255.255.255.0'> <dhcp> <range start='192.168.80.1' end='192.168.80.200'/> <host mac='52:54:00:2c:85:92' name='openstack-controller-00' ip='192.168.80.1'/> <host mac='52:54:00:e2:4b:25' name='openstack-database-00' ip='192.168.80.2'/> <host mac='52:54:00:50:91:04' name='openstack-keystone-00' ip='192.168.80.3'/> <host mac='52:54:00:fe:5b:36' name='openstack-rabbitmq-00' ip='192.168.80.7'/> <host mac='52:54:00:95:ca:bd' name='openstack-glance-00' ip='192.168.80.5'/> </dhcp> </ip> </network> When attempting to bring up the relevant interface in the virtual machine, I get an incorrect IP address assigned, different from the one I statically set up per the XML above. As you can see, the device with MAC '52:54:00:e2:4b:25' should really be getting 192.168.80.2, but what happens when we bring this interface up is this: =========== root@openstack-database-00:/home/osc# ifup ens11 Internet Systems Consortium DHCP Client 4.3.3 Copyright 2004-2015 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/ens11/... Sending on LPF/ens11/... Sending on Socket/fallback DHCPDISCOVER on ens11 to 255.255.255.255 port 67 interval 3 (xid=0x6769e42a) DHCPREQUEST of 192.168.80.27 on ens11 to 255.255.255.255 port 67 (xid=0x2ae46967) DHCPOFFER of 192.168.80.27 from 192.168.80.254 DHCPACK of 192.168.80.27 from 192.168.80.254 bound to 192.168.80.27 -- renewal in 1407 seconds. Some additional info about the VM and network it's attached to =========== [root@dragon dnsmasq]# virsh domiflist openstack-database-00 Interface Type Source Model MAC ------------------------------------------------------- vnet12 bridge br20 virtio 52:54:00:6c:ce:b9 vnet13 network VM_MGMT rtl8139 52:54:00:7d:ca:87 vnet14 network osc_mgmt rtl8139 52:54:00:e2:4b:25 [root@dragon dnsmasq]# virsh net-info osc_mgmt Name: osc_mgmt UUID: d93fe709-14ae-4a0e-8989-aeaa8c76c513 Active: yes Persistent: yes Autostart: yes Bridge: osc_mgmt =========== What's strange is that the first VM seems to work correctly and gets an assigned address of 192.168.80.1, but for some reason the others don't. Any ideas?
Please check the dnsmasq hostsfile, should have all the records there: # cat /var/lib/libvirt/dnsmasq/osc_mgmt.hostsfile 52:54:00:2c:85:92,192.168.80.1,openstack-controller-00 52:54:00:e2:4b:25,192.168.80.2,openstack-database-00 52:54:00:50:91:04,192.168.80.3,openstack-keystone-00 52:54:00:fe:5b:36,192.168.80.7,openstack-rabbitmq-00 52:54:00:95:ca:bd,192.168.80.5,openstack-glance-00 ------- Best Regards, Yalan Zhang IRC: yalzhang Internal phone: 8389413 On Mon, Oct 30, 2017 at 8:26 AM, Dagmawi Biru <admin@dbvoid.com> wrote:
Given the following network configuration: =========== <network> <name>osc_mgmt</name> <uuid>d93fe709-14ae-4a0e-8989-aeaa8c76c513</uuid> <forward mode='route'/> <bridge name='osc_mgmt' stp='on' delay='0'/> <mac address='52:54:00:3f:fe:10'/> <ip address='192.168.80.254' netmask='255.255.255.0'> <dhcp> <range start='192.168.80.1' end='192.168.80.200'/> <host mac='52:54:00:2c:85:92' name='openstack-controller-00' ip='192.168.80.1'/> <host mac='52:54:00:e2:4b:25' name='openstack-database-00' ip='192.168.80.2'/> <host mac='52:54:00:50:91:04' name='openstack-keystone-00' ip='192.168.80.3'/> <host mac='52:54:00:fe:5b:36' name='openstack-rabbitmq-00' ip='192.168.80.7'/> <host mac='52:54:00:95:ca:bd' name='openstack-glance-00' ip='192.168.80.5'/> </dhcp> </ip> </network>
When attempting to bring up the relevant interface in the virtual machine, I get an incorrect IP address assigned, different from the one I statically set up per the XML above. As you can see, the device with MAC '52:54:00:e2:4b:25' should really be getting 192.168.80.2, but what happens when we bring this interface up is this:
=========== root@openstack-database-00:/home/osc# ifup ens11 Internet Systems Consortium DHCP Client 4.3.3 Copyright 2004-2015 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/ens11/... Sending on LPF/ens11/... Sending on Socket/fallback DHCPDISCOVER on ens11 to 255.255.255.255 port 67 interval 3 (xid=0x6769e42a) DHCPREQUEST of 192.168.80.27 on ens11 to 255.255.255.255 port 67 (xid=0x2ae46967) DHCPOFFER of 192.168.80.27 from 192.168.80.254 DHCPACK of 192.168.80.27 from 192.168.80.254 bound to 192.168.80.27 -- renewal in 1407 seconds.
Some additional info about the VM and network it's attached to ===========
[root@dragon dnsmasq]# virsh domiflist openstack-database-00 Interface Type Source Model MAC ------------------------------------------------------- vnet12 bridge br20 virtio 52:54:00:6c:ce:b9 vnet13 network VM_MGMT rtl8139 52:54:00:7d:ca:87 vnet14 network osc_mgmt rtl8139 52:54:00:e2:4b:25
[root@dragon dnsmasq]# virsh net-info osc_mgmt Name: osc_mgmt UUID: d93fe709-14ae-4a0e-8989-aeaa8c76c513 Active: yes Persistent: yes Autostart: yes Bridge: osc_mgmt ===========
What's strange is that the first VM seems to work correctly and gets an assigned address of 192.168.80.1, but for some reason the others don't. Any ideas?
_______________________________________________ libvirt-users mailing list libvirt-users@redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users
Hi, It looks like that's the issue: # cat /var/lib/libvirt/dnsmasq/osc_mgmt.hostsfile 52:54:00:2c:85:92,192.168.80.1,openstack-controller-00 But it makes me wonder...libvirt should be generating and managing this file right? Do I need to edit this myself or should libvirt be updating this file? If so then why isn't it? On Mon, Oct 30, 2017 at 5:21 AM, Yalan Zhang <yalzhang@redhat.com> wrote:
Please check the dnsmasq hostsfile, should have all the records there:
# cat /var/lib/libvirt/dnsmasq/osc_mgmt.hostsfile 52:54:00:2c:85:92,192.168.80.1,openstack-controller-00 52:54:00:e2:4b:25,192.168.80.2,openstack-database-00 52:54:00:50:91:04,192.168.80.3,openstack-keystone-00 52:54:00:fe:5b:36,192.168.80.7,openstack-rabbitmq-00 52:54:00:95:ca:bd,192.168.80.5,openstack-glance-00
------- Best Regards, Yalan Zhang IRC: yalzhang Internal phone: 8389413
On Mon, Oct 30, 2017 at 8:26 AM, Dagmawi Biru <admin@dbvoid.com> wrote:
Given the following network configuration: =========== <network> <name>osc_mgmt</name> <uuid>d93fe709-14ae-4a0e-8989-aeaa8c76c513</uuid> <forward mode='route'/> <bridge name='osc_mgmt' stp='on' delay='0'/> <mac address='52:54:00:3f:fe:10'/> <ip address='192.168.80.254' netmask='255.255.255.0'> <dhcp> <range start='192.168.80.1' end='192.168.80.200'/> <host mac='52:54:00:2c:85:92' name='openstack-controller-00' ip='192.168.80.1'/> <host mac='52:54:00:e2:4b:25' name='openstack-database-00' ip='192.168.80.2'/> <host mac='52:54:00:50:91:04' name='openstack-keystone-00' ip='192.168.80.3'/> <host mac='52:54:00:fe:5b:36' name='openstack-rabbitmq-00' ip='192.168.80.7'/> <host mac='52:54:00:95:ca:bd' name='openstack-glance-00' ip='192.168.80.5'/> </dhcp> </ip> </network>
When attempting to bring up the relevant interface in the virtual machine, I get an incorrect IP address assigned, different from the one I statically set up per the XML above. As you can see, the device with MAC '52:54:00:e2:4b:25' should really be getting 192.168.80.2, but what happens when we bring this interface up is this:
=========== root@openstack-database-00:/home/osc# ifup ens11 Internet Systems Consortium DHCP Client 4.3.3 Copyright 2004-2015 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/ens11/... Sending on LPF/ens11/... Sending on Socket/fallback DHCPDISCOVER on ens11 to 255.255.255.255 port 67 interval 3 (xid=0x6769e42a) DHCPREQUEST of 192.168.80.27 on ens11 to 255.255.255.255 port 67 (xid=0x2ae46967) DHCPOFFER of 192.168.80.27 from 192.168.80.254 DHCPACK of 192.168.80.27 from 192.168.80.254 bound to 192.168.80.27 -- renewal in 1407 seconds.
Some additional info about the VM and network it's attached to ===========
[root@dragon dnsmasq]# virsh domiflist openstack-database-00 Interface Type Source Model MAC ------------------------------------------------------- vnet12 bridge br20 virtio 52:54:00:6c:ce:b9 vnet13 network VM_MGMT rtl8139 52:54:00:7d:ca:87 vnet14 network osc_mgmt rtl8139 52:54:00:e2:4b:25
[root@dragon dnsmasq]# virsh net-info osc_mgmt Name: osc_mgmt UUID: d93fe709-14ae-4a0e-8989-aeaa8c76c513 Active: yes Persistent: yes Autostart: yes Bridge: osc_mgmt ===========
What's strange is that the first VM seems to work correctly and gets an assigned address of 192.168.80.1, but for some reason the others don't. Any ideas?
_______________________________________________ libvirt-users mailing list libvirt-users@redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users
On 10/31/2017 06:27 AM, Dagmawi Biru wrote:
Hi,
It looks like that's the issue: # cat /var/lib/libvirt/dnsmasq/osc_mgmt.hostsfile 52:54:00:2c:85:92,192.168.80.1,openstack-controller-00
But it makes me wonder...libvirt should be generating and managing this file right? Do I need to edit this myself or should libvirt be updating this file? If so then why isn't it?
Have you restarted the libvirt network after you've edited it? virsh net-destroy osc_mgmt virsh net-start osc_mgmt The hostsfile is generated when network is started. It's the same as editing domain XML while it is running. Changes get applied on next start. Michal
participants (3)
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Dagmawi Biru -
Michal Privoznik -
Yalan Zhang