openstack team mailing list archive

["Heinonen, Johanna (NSN - FI/Espoo)" <johanna.heinonen@xxxxxxx>]

Hi,

I have installed grizzly with quantum and ovs-plugin. It seems that grizzly allocates the third address of each subnet for dhcp. (In folsom it was the second address). This means that the VMs will get addresses .2, .4, .5, ...

In my setup the first VM always boots fine and gets the address x.x.x.2. This can be seen in the syslog:

May 20 08:29:23 grizzly-236 dnsmasq-dhcp[2190]: DHCPDISCOVER(tapdbcef145-f5) 10.0.2.15 fa:16:3e:2d:0d:e0
May 20 08:29:23 grizzly-236 dnsmasq-dhcp[2190]: DHCPOFFER(tapdbcef145-f5) 10.20.30.2 fa:16:3e:2d:0d:e0
May 20 08:29:23 grizzly-236 dnsmasq-dhcp[2190]: DHCPREQUEST(tapdbcef145-f5) 10.20.30.2 fa:16:3e:2d:0d:e0
May 20 08:29:23 grizzly-236 dnsmasq-dhcp[2190]: DHCPACK(tapdbcef145-f5) 10.20.30.2 fa:16:3e:2d:0d:e0 10-20-30-2

The problem comes when I start the second VM. Nova shows that the x.x.x.4 is allocated

root@grizzly-236:~# nova list
+--------------------------------------+----------+--------+------------------------+
| ID                                   | Name     | Status | Networks               |
+--------------------------------------+----------+--------+------------------------+
| c112ccbb-5039-4d05-b414-b53a1eafa2d8 | q-test   | ACTIVE | tenant1-net=10.20.30.2 |
| 4f26975c-995d-403d-88b0-e7bbf189baad | q-test-2 | ACTIVE | tenant1-net=10.20.30.4 |
+--------------------------------------+----------+--------+------------------------+

But from syslog I see that the answer to the DHCPDISCOVER is "no address available"

May 20 08:33:34 grizzly-236 dnsmasq-dhcp[2190]: DHCPDISCOVER(tapdbcef145-f5) 10.0.2.15 fa:16:3e:fc:1f:9a no address available
May 20 08:33:52 grizzly-236 dnsmasq-dhcp[2190]: DHCPDISCOVER(tapdbcef145-f5) 10.0.2.15 fa:16:3e:fc:1f:9a no address available

When I restart the quantum-dhcp-server the problem disappears. This can be seen from the syslog:

May 20 09:01:40 grizzly-236 dnsmasq[7235]: started, version 2.59 cachesize 150
May 20 09:01:40 grizzly-236 dnsmasq[7235]: compile time options: IPv6 GNU-getopt DBus i18n DHCP TFTP conntrack IDN
May 20 09:01:40 grizzly-236 dnsmasq[7235]: warning: no upstream servers configured
May 20 09:01:40 grizzly-236 dnsmasq-dhcp[7235]: DHCP, static leases only on 10.20.30.0, lease time 2m
May 20 09:01:40 grizzly-236 dnsmasq[7235]: cleared cache
May 20 09:01:40 grizzly-236 dnsmasq-dhcp[7235]: read /var/lib/quantum/dhcp/e6f27330-be41-478c-b4d2-49ed4ce0af00/host
May 20 09:01:40 grizzly-236 dnsmasq-dhcp[7235]: read /var/lib/quantum/dhcp/e6f27330-be41-478c-b4d2-49ed4ce0af00/opts
May 20 09:02:19 grizzly-236 dnsmasq-dhcp[7235]: DHCPREQUEST(tapdbcef145-f5) 10.20.30.2 fa:16:3e:2d:0d:e0
May 20 09:02:19 grizzly-236 dnsmasq-dhcp[7235]: DHCPNAK(tapdbcef145-f5) 10.20.30.2 fa:16:3e:2d:0d:e0 lease not found
May 20 09:02:19 grizzly-236 dnsmasq-dhcp[7235]: DHCPDISCOVER(tapdbcef145-f5) fa:16:3e:2d:0d:e0
May 20 09:02:19 grizzly-236 dnsmasq-dhcp[7235]: DHCPOFFER(tapdbcef145-f5) 10.20.30.2 fa:16:3e:2d:0d:e0
May 20 09:02:19 grizzly-236 dnsmasq-dhcp[7235]: DHCPREQUEST(tapdbcef145-f5) 10.20.30.2 fa:16:3e:2d:0d:e0
May 20 09:02:19 grizzly-236 dnsmasq-dhcp[7235]: DHCPACK(tapdbcef145-f5) 10.20.30.2 fa:16:3e:2d:0d:e0 10-20-30-2

May 20 09:03:39 grizzly-236 dnsmasq-dhcp[7235]: DHCPDISCOVER(tapdbcef145-f5) fa:16:3e:fc:1f:9a
May 20 09:03:39 grizzly-236 dnsmasq-dhcp[7235]: DHCPOFFER(tapdbcef145-f5) 10.20.30.4 fa:16:3e:fc:1f:9a
May 20 09:03:39 grizzly-236 dnsmasq-dhcp[7235]: DHCPREQUEST(tapdbcef145-f5) 10.20.30.4 fa:16:3e:fc:1f:9a
May 20 09:03:39 grizzly-236 dnsmasq-dhcp[7235]: DHCPACK(tapdbcef145-f5) 10.20.30.4 fa:16:3e:fc:1f:9a 10-20-30-4


What could be the problem? Have you seen similar behavior? If yes, how did you fix this?

Best regards,
Johanna