[Openstack-operators] floatin ip issue

George Shuklin george.shuklin at gmail.com
Mon Oct 27 22:51:07 UTC 2014


I don't like this:

15: qg-d351f21a-08: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state 
UNKNOWN group default
     inet 192.168.122.193/24 <http://192.168.122.193/24> brd 
192.168.122.255 scope global qg-d351f21a-08
        valid_lft forever preferred_lft forever
     inet 192.168.122.194/32 <http://192.168.122.194/32> brd 
192.168.122.194 scope global qg-d351f21a-08
        valid_lft forever preferred_lft forever

Why you got two IPs on same interface with different netmasks?

I just rechecked it on our installations - it should not be happens.

Next: or this is a bug, or this is uncleaned network node (lesser bug), 
or someone messing with neutron.

Starts from neutron:

show ports for router:

neutron port-list --device-id=router-uuid-here
neutron floatingips-list
neutron net-list
neutron subnet-list
(trim to related only)

(and please mark again who is 'internet' and who is 'internal' ips, i'm 
kinda loosing in '192.168.*'.


On 10/27/2014 04:47 PM, Paras pradhan wrote:
> *Yes it got its ip which is 192.168.122.194 in the paste below.*
>
> --
>
> root at juno2:~# ip netns exec 
> qrouter-34f3b828-b7b8-4f44-b430-14d9c5bd0d0c ip -4 a
>
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
> group default
>
>     inet 127.0.0.1/8 <http://127.0.0.1/8> scope host lo
>
>        valid_lft forever preferred_lft forever
>
> 14: qr-ac50d700-29: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue 
> state UNKNOWN group default
>
>     inet 50.50.50.1/24 <http://50.50.50.1/24> brd 50.50.50.255 scope 
> global qr-ac50d700-29
>
>        valid_lft forever preferred_lft forever
>
> 15: qg-d351f21a-08: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue 
> state UNKNOWN group default
>
>     inet 192.168.122.193/24 <http://192.168.122.193/24> brd 
> 192.168.122.255 scope global qg-d351f21a-08
>
>        valid_lft forever preferred_lft forever
>
>     inet 192.168.122.194/32 <http://192.168.122.194/32> brd 
> 192.168.122.194 scope global qg-d351f21a-08
>
>        valid_lft forever preferred_lft forever
>
> ---
>
> *stdbuf -e0 -o0 ip net exec qrouter... /bin/bash give me the following
> *
>
>
> --
>
>
> root at juno2:~# ifconfig
>
> 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:65536 Metric:1
>
>           RX packets:2 errors:0 dropped:0 overruns:0 frame:0
>
>           TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
>
>           collisions:0 txqueuelen:0
>
>           RX bytes:168 (168.0 B)  TX bytes:168 (168.0 B)
>
>
> qg-d351f21a-08 Link encap:Ethernet  HWaddr fa:16:3e:79:0f:a2
>
>           inet addr:192.168.122.193 Bcast:192.168.122.255  
> Mask:255.255.255.0
>
>           inet6 addr: fe80::f816:3eff:fe79:fa2/64 Scope:Link
>
>           UP BROADCAST RUNNING  MTU:1500 Metric:1
>
>           RX packets:2673 errors:0 dropped:0 overruns:0 frame:0
>
>           TX packets:112 errors:0 dropped:0 overruns:0 carrier:0
>
>           collisions:0 txqueuelen:0
>
>           RX bytes:205377 (205.3 KB)  TX bytes:6537 (6.5 KB)
>
>
> qr-ac50d700-29 Link encap:Ethernet  HWaddr fa:16:3e:7e:6d:f3
>
>           inet addr:50.50.50.1 Bcast:50.50.50.255  Mask:255.255.255.0
>
>           inet6 addr: fe80::f816:3eff:fe7e:6df3/64 Scope:Link
>
>           UP BROADCAST RUNNING  MTU:1500 Metric:1
>
>           RX packets:345 errors:0 dropped:0 overruns:0 frame:0
>
>           TX packets:1719 errors:0 dropped:0 overruns:0 carrier:0
>
>           collisions:0 txqueuelen:0
>
>           RX bytes:27377 (27.3 KB)  TX bytes:164541 (164.5 KB)
>
> --
>
>
> Thanks
>
> Paras.
>
>
>
> On Sat, Oct 25, 2014 at 3:18 AM, George Shuklin 
> <george.shuklin at gmail.com <mailto:george.shuklin at gmail.com>> wrote:
>
>     Check out if qrouter got floating inside network namespace  (ip
>     net exec qrouter... ip -4 a), or just bash in to it (stdbuf -e0
>     -o0 ip net exec qrouter... /bin/bash) and play with it like with
>     normal server.
>
>
>
>     On 10/24/2014 07:38 PM, Paras pradhan wrote:
>>     Hello,
>>
>>     Assigned a floating ip to an instance. But I can't ping the
>>     instance. This instance can reach internet with no problem. But I
>>     can't ssh or icmp to this instance. Its not a security group issue.
>>
>>     On my network node that runs l3, I can see qrouter. The extenel
>>     subnet looks like this:
>>
>>     allocation-pool start=192.168.122.193,end=192.168.122.222
>>     --disable-dhcp --gateway 192.168.122.1 192.168.122.0/24
>>     <http://192.168.122.0/24>
>>
>>     I can ping 192.168.122.193 using: ip netns exec
>>     qrouter-34f3b828-b7b8-4f44-b430-14d9c5bd0d0c ping 192.168.122.193
>>
>>     but not 192.168.122.194 (which is the floating ip)
>>
>>     Doing tcp dump on the interace that connects to the external
>>     world, I can see ICMP request but not reply from the interface :
>>
>>
>>     11:36:40.360255 IP 192.168.122.1 > 192.168.122.194
>>     <http://192.168.122.194>: ICMP echo request, id 2589, seq 312,
>>     length 64
>>
>>     11:36:41.360222 IP 192.168.122.1 > 192.168.122.194
>>     <http://192.168.122.194>: ICMP echo request, id 2589, seq 313,
>>     length 64
>>
>>
>>     Ideas?
>>
>>     Thanks
>>
>>     Paras.
>>
>>
>>
>>     _______________________________________________
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>>     OpenStack-operators at lists.openstack.org  <mailto:OpenStack-operators at lists.openstack.org>
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>
>
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>

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