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Message #22825
Re: FlatDHCP networking problem
Looking at /var/log/syslog I have found some more info:
Apr 19 12:36:26 dnsmasq-dhcp[2204]: read
/var/lib/nova/networks/nova-br100.conf
Apr 19 12:36:34 kernel: [176191.796184] device vnet0 entered
promiscuous mode
Apr 19 12:36:34 kernel: [176191.874774] br100: port 2(vnet0) entering
forwarding state
Apr 19 12:36:34 kernel: [176191.874796] br100: port 2(vnet0) entering
forwarding state
Apr 19 12:36:36 kernel: [176194.057668] kvm: 11182: cpu0 unhandled
rdmsr: 0xc0010001
Apr 19 12:36:37 ntpd[3497]: Listen normally on 36 vnet0
fe80::fc16:3eff:fe24:1cab UDP 123
Apr 19 12:36:37 ntpd[3497]: peers refreshed
Apr 19 12:36:38 dnsmasq-dhcp[2204]: DHCPDISCOVER(br100)
fa:16:3e:24:1c:ab no address available
Apr 19 12:36:41 dnsmasq-dhcp[2204]: DHCPDISCOVER(br100)
fa:16:3e:24:1c:ab no address available
Apr 19 12:36:44 dnsmasq-dhcp[2204]: DHCPDISCOVER(br100)
fa:16:3e:24:1c:ab no address available
The thing is that /var/lib/nova/networks/nova-br100.conf is empty. Can
that be the cause dnsmasq-dhcp doesn't have available addresses?
Thanks,
Javier
On 18/04/13 17:38, Javier Alvarez wrote:
Hello all,
Here it is my situation:
I am trying to install Essex on a small cluster (3 nodes) running
Debian. There is a front-end node that has a public IP and then there
are 2 compute nodes in a LAN. I cannot run nova-network on the
front-end node because it is overwritting the iptables there and some
other services start to misbehave, so I am trying a multi-host
solution with nova-network running in each compute node.
The nova.conf I'm using in both compute nodes is the following:
[DEFAULT]
logdir=/var/log/nova
state_path=/var/lib/nova
lock_path=/var/lock/nova
root_helper=sudo nova-rootwrap
auth_strategy=keystone
iscsi_helper=tgtadm
sql_connection=mysql://nova-common:password@172.16.8.1/nova
connection_type=libvirt
libvirt_type=kvm
my_ip=172.16.8.22
rabbit_host=172.16.8.1
glance_host=172.16.8.1
image_service=nova.image.glance.GlanceImageService
network_manager=nova.network.manager.FlatDHCPManager
fixed_range=192.168.100.0/24
flat_interface=eth1
public_interface=eth0
flat_network_bridge=br100
flat_network_dhcp_start=192.168.100.2
network_size=256
dhcpbridge_flagfile=/etc/nova/nova.conf
dhcpbridge=/usr/bin/nova-dhcpbridge
multi_host=True
send_arp_for_ha=true
I have created a network with:
nova-manage network create private --fixed_range_v4=192.168.100.0/24
--multi_host=T --bridge_interface=br100
And I have set up eth1 with no IP and running in promisc mode. When I
launch an instance, ifconfig outputs the following:
br100 Link encap:Ethernet HWaddr 68:b5:99:c2:7b:a7
inet addr:192.168.100.3 Bcast:192.168.100.255
Mask:255.255.255.0
inet6 addr: fe80::7033:eeff:fe29:81ae/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:90 (90.0 B)
eth0 Link encap:Ethernet HWaddr 68:b5:99:c2:7b:a6
inet addr:172.16.8.22 Bcast:172.16.8.255 Mask:255.255.255.0
inet6 addr: fe80::6ab5:99ff:fec2:7ba6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4432580 errors:0 dropped:0 overruns:0 frame:0
TX packets:4484811 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:457880509 (436.6 MiB) TX bytes:398588034 (380.1 MiB)
Memory:fe860000-fe880000
eth1 Link encap:Ethernet HWaddr 68:b5:99:c2:7b:a7
UP BROADCAST PROMISC MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Memory:fe8e0000-fe900000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:52577 errors:0 dropped:0 overruns:0 frame:0
TX packets:52577 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2737820 (2.6 MiB) TX bytes:2737820 (2.6 MiB)
vnet0 Link encap:Ethernet HWaddr fe:16:3e:2d:40:3b
inet6 addr: fe80::fc16:3eff:fe2d:403b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:0 (0.0 B) TX bytes:370 (370.0 B)
And brctl show:
bridge name bridge id STP enabled interfaces
br100 8000.68b599c27ba7 no eth1
vnet0
Which looks fine to me. However, the VM log shows that it is unable to
get an IP through DHCP (despite dnsmasq is running):
Starting network...
udhcpc (v1.18.5) started
Sending discover...
Sending discover...
Sending discover...
No lease, failing
WARN: /etc/rc3.d/S40-network failed
What am I doing wrong? Any help would be very much appreciated.
Thanks in advance,
Javier
--
Javier Álvarez Cid-Fuentes
Grid Computing and Clusters Group
Barcelona Supercomputing Center (BSC-CNS)
Tel. (+34) 93 413 72 46
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