[Openstack] Neutron Issues...
Erich Weiler
weiler at soe.ucsc.edu
Sat Apr 12 20:02:34 UTC 2014
Hi Y'all,
I'm making some progress on my neutron VLAN deployment issues, but it's
still not working as expected. I have my compute nodes data port
connected to a switchport that is a trunk, allowing VLANs 200-209 to
flow over the trunk. The neutron node also has its internal data port
on the same switch, on a trunk port, also allowing VLANs 200-209 to flow
over it.
I *think* I have OVS configured correctly on the neutron network node
and the compute nodes.
To test I just created an internal network (on physnet1) callled
test-net on segmentation-id 200 (network 10.200.0.0/16). So I assume it
will use VLAN 200. I then created a VM and attached it to that network.
But when the VM boots, it does not get an IP address from dnsmasq.
Back on the network node, I see dnsmasq running on that VLAN, I think:
# ps -afe | grep masq
nobody 16674 1 0 Apr10 ? 00:00:00 dnsmasq --no-hosts
--no-resolv --strict-order --bind-interfaces --interface=tapc5195287-8f
--except-interface=lo
--pid-file=/var/lib/neutron/dhcp/e4448083-ec61-4293-ad0e-62239986965f/pid --dhcp-hostsfile=/var/lib/neutron/dhcp/e4448083-ec61-4293-ad0e-62239986965f/host
--addn-hosts=/var/lib/neutron/dhcp/e4448083-ec61-4293-ad0e-62239986965f/addn_hosts
--dhcp-optsfile=/var/lib/neutron/dhcp/e4448083-ec61-4293-ad0e-62239986965f/opts
--leasefile-ro --dhcp-range=tag0,10.200.0.0,static,86400s
--dhcp-lease-max=65536 --conf-file= --domain=openstacklocal
And I tried doing a tcpdump on eth2 (which is the data interface with
the VLANs) while doing a DHCPDISCOVER from the VM:
# tcpdump -i eth2
tcpdump: WARNING: eth2: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth2, link-type EN10MB (Ethernet), capture size 65535 bytes
12:43:46.440221 STP 802.1d, Config, Flags [none], bridge-id
c0cd.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.440563 STP 802.1d, Config, Flags [none], bridge-id
c0c9.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.440896 STP 802.1d, Config, Flags [none], bridge-id
c0cc.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.441414 STP 802.1d, Config, Flags [none], bridge-id
c0ca.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.441672 STP 802.1d, Config, Flags [none], bridge-id
c0cb.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.442001 STP 802.1d, Config, Flags [none], bridge-id
c0ce.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.442502 STP 802.1d, Config, Flags [none], bridge-id
c0d0.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.442830 STP 802.1d, Config, Flags [none], bridge-id
c0d1.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.443171 STP 802.1d, Config, Flags [none], bridge-id
c0c8.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:46.443470 STP 802.1d, Config, Flags [none], bridge-id
c0cf.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:47.718633 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP,
Request from fa:16:3e:5d:11:5b (oui Unknown), length 280
12:43:47.719183 IP 10.200.0.3.bootps > 10.200.0.6.bootpc: BOOTP/DHCP,
Reply, length 325
12:43:48.447761 STP 802.1d, Config, Flags [none], bridge-id
c0cd.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.448109 STP 802.1d, Config, Flags [none], bridge-id
c0c9.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.448593 STP 802.1d, Config, Flags [none], bridge-id
c0cc.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.448896 STP 802.1d, Config, Flags [none], bridge-id
c0ca.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.449266 STP 802.1d, Config, Flags [none], bridge-id
c0cb.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.449672 STP 802.1d, Config, Flags [none], bridge-id
c0ce.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.450010 STP 802.1d, Config, Flags [none], bridge-id
c0d0.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.450385 STP 802.1d, Config, Flags [none], bridge-id
c0d1.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.450678 STP 802.1d, Config, Flags [none], bridge-id
c0c8.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:48.451115 STP 802.1d, Config, Flags [none], bridge-id
c0cf.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:49.946348 VTPv1, Message Join message (0x04), length 166
12:43:50.459700 STP 802.1d, Config, Flags [none], bridge-id
c0cd.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.460184 STP 802.1d, Config, Flags [none], bridge-id
c0c9.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.460529 STP 802.1d, Config, Flags [none], bridge-id
c0cc.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.460867 STP 802.1d, Config, Flags [none], bridge-id
c0ca.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.461195 STP 802.1d, Config, Flags [none], bridge-id
c0cb.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.461625 STP 802.1d, Config, Flags [none], bridge-id
c0ce.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.461956 STP 802.1d, Config, Flags [none], bridge-id
c0d0.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.462335 STP 802.1d, Config, Flags [none], bridge-id
c0d1.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.462745 STP 802.1d, Config, Flags [none], bridge-id
c0c8.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:50.463072 STP 802.1d, Config, Flags [none], bridge-id
c0cf.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.455118 STP 802.1d, Config, Flags [none], bridge-id
c0cd.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.455591 STP 802.1d, Config, Flags [none], bridge-id
c0c9.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.455930 STP 802.1d, Config, Flags [none], bridge-id
c0cc.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.456258 STP 802.1d, Config, Flags [none], bridge-id
c0ca.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.456575 STP 802.1d, Config, Flags [none], bridge-id
c0cb.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.457053 STP 802.1d, Config, Flags [none], bridge-id
c0ce.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.457414 STP 802.1d, Config, Flags [none], bridge-id
c0d0.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.457702 STP 802.1d, Config, Flags [none], bridge-id
c0d1.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.458171 STP 802.1d, Config, Flags [none], bridge-id
c0c8.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.458503 STP 802.1d, Config, Flags [none], bridge-id
c0cf.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:52.718355 ARP, Request who-has 10.200.0.6 tell 10.200.0.3, length 28
12:43:53.718209 ARP, Request who-has 10.200.0.6 tell 10.200.0.3, length 28
12:43:54.460398 STP 802.1d, Config, Flags [none], bridge-id
c0cd.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.460871 STP 802.1d, Config, Flags [none], bridge-id
c0c9.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.461187 STP 802.1d, Config, Flags [none], bridge-id
c0cc.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.461588 STP 802.1d, Config, Flags [none], bridge-id
c0ca.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.461984 STP 802.1d, Config, Flags [none], bridge-id
c0cb.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.462361 STP 802.1d, Config, Flags [none], bridge-id
c0ce.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.462652 STP 802.1d, Config, Flags [none], bridge-id
c0d0.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.462981 STP 802.1d, Config, Flags [none], bridge-id
c0d1.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.463474 STP 802.1d, Config, Flags [none], bridge-id
c0c8.c4:7d:4f:ec:d3:00.81a5, length 42
12:43:54.463751 STP 802.1d, Config, Flags [none], bridge-id
c0cf.c4:7d:4f:ec:d3:00.81a5, length 42
Where 10.200.0.3 is the IP address of the dnsmasq instance on the
network node and 10.200.0.6 is the IP (supposedly) of the VM, from what
nova tells me. It seems the traffic is getting to the network node, but
the VM never gets the IP. Even if I configure the VM statically to be
10.200.0.6, I still can't ping the DHCP server on 10.200.0.3.
It looks like ARP requests are getting sent out for the DHCP server hen
I ping (as seen fro the network node):
# tcpdump -i eth2
tcpdump: WARNING: eth2: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth2, link-type EN10MB (Ethernet), capture size 65535 bytes
12:57:08.871232 STP 802.1d, Config, Flags [none], bridge-id
c0cd.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.871717 STP 802.1d, Config, Flags [none], bridge-id
c0c9.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.872063 STP 802.1d, Config, Flags [none], bridge-id
c0cc.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.872421 STP 802.1d, Config, Flags [none], bridge-id
c0ca.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.872819 STP 802.1d, Config, Flags [none], bridge-id
c0cb.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.873212 STP 802.1d, Config, Flags [none], bridge-id
c0ce.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.873507 STP 802.1d, Config, Flags [none], bridge-id
c0d0.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.873839 STP 802.1d, Config, Flags [none], bridge-id
c0d1.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.874329 STP 802.1d, Config, Flags [none], bridge-id
c0c8.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:08.874621 STP 802.1d, Config, Flags [none], bridge-id
c0cf.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:09.041413 VTPv1, Message Join message (0x04), length 166
12:57:09.289413 ARP, Request who-has 10.200.0.3 tell 10.200.0.6, length 46
12:57:09.289435 ARP, Reply 10.200.0.3 is-at fa:16:3e:c2:ec:b5 (oui
Unknown), length 28
12:57:10.289706 ARP, Request who-has 10.200.0.3 tell 10.200.0.6, length 46
12:57:10.289728 ARP, Reply 10.200.0.3 is-at fa:16:3e:c2:ec:b5 (oui
Unknown), length 28
12:57:10.876689 STP 802.1d, Config, Flags [none], bridge-id
c0cd.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.877031 STP 802.1d, Config, Flags [none], bridge-id
c0c9.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.877439 STP 802.1d, Config, Flags [none], bridge-id
c0cc.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.877843 STP 802.1d, Config, Flags [none], bridge-id
c0ca.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.878190 STP 802.1d, Config, Flags [none], bridge-id
c0cb.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.878542 STP 802.1d, Config, Flags [none], bridge-id
c0ce.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.878824 STP 802.1d, Config, Flags [none], bridge-id
c0d0.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.879282 STP 802.1d, Config, Flags [none], bridge-id
c0d1.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.879612 STP 802.1d, Config, Flags [none], bridge-id
c0c8.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:10.879933 STP 802.1d, Config, Flags [none], bridge-id
c0cf.c4:7d:4f:ec:d3:00.81a5, length 42
12:57:11.289582 ARP, Request who-has 10.200.0.3 tell 10.200.0.6, length 46
12:57:11.289603 ARP, Reply 10.200.0.3 is-at fa:16:3e:c2:ec:b5 (oui
Unknown), length 28
12:57:12.289668 ARP, Request who-has 10.200.0.3 tell 10.200.0.6, length 46
12:57:12.289689 ARP, Reply 10.200.0.3 is-at fa:16:3e:c2:ec:b5 (oui
Unknown), length 28
But the VM doesn't get any ping replies... Maybe ARP is having issues?
Can anyone see anything wrong with this picture?
Thanks!!
-erich
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