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Message #04589
Re: dns issue?
Check if you have a dnsmasq running on host that runs nova-network. It's
necessary a DNS service on 10.0.1.1.
On the nova-network host:
$ ps aux | grep dns
or you can look for open ports:
$ netstat -tupan | grep 53
:)
On Fri, Oct 7, 2011 at 2:08 PM, Sharif Islam <islamsh@xxxxxxxxxxx> wrote:
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> The instances in openstack are running and I can ssh using the public
> address (cactus release). Today I noticed, the vms cannnot connect to
> the outside world properly. I don't recall this happening before. The
> issue seems to be with name resolution. I can ping fine using the ip
> addresses.
>
>
> $ ssh -i natty2.pem root@xxxxxxxxxxxxxx
> Welcome to Ubuntu 11.04 (GNU/Linux 2.6.38-11-virtual x86_64)
>
> Last login: Fri Oct 7 14:17:47 2011 from 129.79.49.229
> root@i-000003e4:~# ifconfig eth0
> eth0 Link encap:Ethernet HWaddr 02:16:3e:27:5a:da
> inet addr:10.0.1.7 Bcast:10.0.1.255 Mask:255.255.255.0
> inet6 addr: fe80::16:3eff:fe27:5ada/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:3995 errors:0 dropped:0 overruns:0 frame:0
> TX packets:494 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:654810 (654.8 KB) TX bytes:67031 (67.0 KB)
> Interrupt:11 Base address:0xa000
>
> root@i-000003e4:~# ping www.google.com
> ping: unknown host www.google.com
> root@i-000003e4:~# ping 72.14.204.103
> PING 72.14.204.103 (72.14.204.103) 56(84) bytes of data.
> 64 bytes from 72.14.204.103: icmp_req=1 ttl=54 time=32.3 ms
> 64 bytes from 72.14.204.103: icmp_req=2 ttl=54 time=32.4 ms
> ^C
> - --- 72.14.204.103 ping statistics ---
>
>
> # dig @10.0.1.1 google.com
>
> ; <<>> DiG 9.7.3 <<>> @10.0.1.1 google.com
> ; (1 server found)
> ;; global options: +cmd
> ;; connection timed out; no servers could be reached
>
>
> # dig @8.8.4.4 google.com
>
> ; <<>> DiG 9.7.3 <<>> @8.8.4.4 google.com
> ; (1 server found)
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 977
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;google.com. IN A
>
> ;; ANSWER SECTION:
> google.com. 300 IN A 72.14.204.147
> google.com. 300 IN A 72.14.204.105
> google.com. 300 IN A 72.14.204.103
> google.com. 300 IN A 72.14.204.104
> google.com. 300 IN A 72.14.204.99
>
> ;; Query time: 36 msec
> ;; SERVER: 8.8.4.4#53(8.8.4.4)
> ;; WHEN: Fri Oct 7 14:39:00 2011
> ;; MSG SIZE rcvd: 108
>
>
> # cat /etc/resolv.conf
> nameserver 10.0.1.1
> domain novalocal
> search novalocal
>
> # route -n
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use
> Iface
> 10.0.1.0 0.0.0.0 255.255.255.0 U 0 0 0
> eth0
> 0.0.0.0 10.0.1.1 0.0.0.0 UG 100 0 0
> eth0
>
> When I add nameserver 8.8.4.4 in resolv.conf, I can ping them. Any idea?
>
>
> - --sharif
>
>
> - --
> Sharif Islam
> Senior Systems Analyst/Programmer
> FutureGrid (http://futuregrid.org)
> Pervasive Technology Institute, Indiana University Bloomington
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--
- MSc. Correa, J.L.
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