OpenStack Compute (nova)

url error [[Errno 101] Network is unreachable]

Asked by sunhee Park

I think, I have problem with DHCP . The compute node doesn't bring ip from dnsmasq-dhcp(from nova-network).

console.log tells me that
----
cloud-init start running: Mon, 31 Oct 2011 07:12:22 +0000. up 64.47 seconds
2011-10-31 07:12:22,276 - DataSourceEc2.py[WARNING]: waiting for metadata service at http://169.254.169.254/2009-04-04/meta-data/instance-id

2011-10-31 07:12:22,277 - DataSourceEc2.py[WARNING]: 07:12:22 [ 1/30]: url error [[Errno 101] Network is unreachable]

2011-10-31 07:12:23,280 - DataSourceEc2.py[WARNING]: 07:12:23 [ 2/30]: url error [[Errno 101] Network is unreachable]

2011-10-31 07:12:24,284 - DataSourceEc2.py[WARNING]: 07:12:24 [ 3/30]: url error [[Errno 101] Network is unreachable
----

I have a two node cluster running on Ubuntu 10.04.3 with the Diablo release from ppa:openstack-release/2011.3

Each machine has two NICs, but two NICs is on same network.

I use flatDHCPManager.

Following are the config files of both nodes.
This is the cloud controller(nova-api, nova-network, nova-scheduler) configuration.
http://pastebin.com/UVBtmvGc

This is the compute node.
http://pastebin.com/j582m5rU

Following are network configurations.
This is the cloud controllers.
http://pastebin.com/w0i42NYP

This is the compute nodes.
http://pastebin.com/Tuu8G3zY

The command "ps aux|grep dnsmasq" on compute node shows
nobody 1331 0.0 0.0 27708 988 ? S 15:51 0:00 dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/default.pid --conf-file= --except-interface lo --listen-address 192.168.122.1 --dhcp-range 192.168.122.2,192.168.122.254 --dhcp-lease-max=253 --dhcp-no-override
root 4064 0.0 0.0 7624 928 pts/1 S+ 16:10 0:00 grep --color=auto dnsmasq

The command "ps aux|grep dnsmasq" on controller node shows
nobody 7153 0.0 0.0 3968 980 ? S 11:20 0:00 dnsmasq --strict-order --bind-interfaces --conf-file= --domain=novalocal --pid-file=/var/lib/nova/networks/nova-br100.pid --listen-address=192.168.100.241 --except-interface=lo --dhcp-range=192.168.100.242,static,120s --dhcp-lease-max=8 --dhcp-hostsfile=/var/lib/nova/networks/nova-br100.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro
root 7154 0.0 0.0 3968 412 ? S 11:20 0:00 dnsmasq --strict-order --bind-interfaces --conf-file= --domain=novalocal --pid-file=/var/lib/nova/networks/nova-br100.pid --listen-address=192.168.100.241 --except-interface=lo --dhcp-range=192.168.100.242,static,120s --dhcp-lease-max=8 --dhcp-hostsfile=/var/lib/nova/networks/nova-br100.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro
root 13110 0.0 0.0 3148 900 pts/3 S+ 16:37 0:00 grep --color=auto dnsmasq

Answer plz.

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Vish Ishaya
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Revision history for this message
sunhee Park (sunny790821) said : 		#1

Logs on compute-node
Oct 31 17:45:00 server3 kernel: [ 6798.085267] nbd15: unknown partition table
Oct 31 17:45:03 server3 kernel: [ 6800.575174] EXT4-fs (nbd15): mounted filesystem with ordered data mode
Oct 31 17:45:04 server3 kernel: [ 6801.351280] JBD: barrier-based sync failed on nbd15-8 - disabling barriers
Oct 31 17:45:05 server3 kernel: [ 6802.534954] nbd15: NBD_DISCONNECT
Oct 31 17:45:05 server3 kernel: [ 6802.535066] nbd15: Receive control failed (result -32)
Oct 31 17:45:05 server3 kernel: [ 6802.535116] nbd15: shutting down socket
Oct 31 17:45:05 server3 kernel: [ 6802.535120] nbd15: queue cleared
Oct 31 17:45:05 server3 kernel: [ 6802.784744] type=1503 audit(1320050705.565:25): operation="open" pid=5902 parent=1229 profile="/usr/lib/libvirt/virt-aa-helper" requested_mask="::r" denied_mask="::r" fsuid=0 ouid=108 name="/var/lib/nova/instances/_base/632667547e7cd3e0466547863e1207a8c0c0c549_sm"
Oct 31 17:45:05 server3 kernel: [ 6802.865133] type=1505 audit(1320050705.645:26): operation="profile_load" pid=5903 name="libvirt-8f1bad0d-e80b-48bc-ce21-5fa4875f3ac3"
Oct 31 17:45:05 server3 kernel: [ 6802.953215] device vnet1 entered promiscuous mode
Oct 31 17:45:05 server3 kernel: [ 6802.953873] br100: port 3(vnet1) entering forwarding state
Oct 31 17:45:06 server3 kernel: [ 6803.238066] kvm: 6052: cpu0 unhandled wrmsr: 0x198 data 0
Oct 31 17:45:07 server3 avahi-daemon[932]: Registering new address record for fe80::fc16:3eff:fe27:6e49 on vnet1.*.
Oct 31 17:45:16 server3 kernel: [ 6813.390016] vnet1: no IPv6 routers present

Revision history for this message
Isaac Finnegan (ifinnegan) said : 		#2

I am also seeing this problem. The compute node dnsmasq appears to be misconfigured.

Revision history for this message
Best Vish Ishaya (vishvananda) said : 		#3

There were a few bugs in the diablo ppa. If you want to install from packages, i would suggest using oneiric and the canonical packages which have backported bugs.

Revision history for this message
sunhee Park (sunny790821) said : 		#4

Thanks Vish Ishaya, that solved my question.