openstack team mailing list archive

["Sreerekha Shenoy (sresheno)" <sresheno@xxxxxxxxx>]

Hi,
What are the good to know tools and networking concepts for me to be able to debug connectivity issues inside Openstack VLAN mode of OVS?

Thanks,
Best Regards,
Rekha

From: Sreerekha Shenoy (sresheno)
Sent: Friday, June 14, 2013 2:23 PM
To: openstack@xxxxxxxxxxxxxxxxxxx
Subject: Issues with openvswitch agent on Quantum/network node

Hi,
I have a multi node grizzly setup using the following guide:
https://github.com/mseknibilel/OpenStack-Grizzly-Install-Guide/blob/OVS_MultiNode/OpenStack_Grizzly_Install_Guide.rst
My network topology is as attached and is using GRE tunnel based VLAN.

I have VMs spawning on compute for cirros images.
However, inter-VM ping works (e.g. 50.50.1.4 can ping 50.50.1.5), but the following DON'T work:

a)      VM cannot ping 50.50.1.1

b)      VM cannot ping Compute ETH1 (data n/w) , 10.20.20.53

c)       VM cannot be reachable from IP Namespace either (ip netns exec qrouter-xxxx ping 50.50.1.4 does NOT work)

Apart from the same, my network node has the following issue AFTER a reboot:

·          On network node the following agent is not running i.e. "quantum-plugin-openvswitch-agent"

·         Logs of this agent indicates it needs the plugin upgrade....dont have the precise error log..

o   ovs-vswitchd.log indicates the following:

§  Apr 16 22:08:39|00482|netdev|WARN|Dropped 233 log messages in last 12 seconds (most recently, 1 seconds ago) due to excessive rate

§  Apr 16 22:08:39|00483|netdev|WARN|failed to get flags for network device qr-12091c58-8a: No such device

§  Apr 16 22:08:43|00484|netdev_linux|WARN|Dropped 35 log messages in last 15 seconds (most recently, 5 seconds ago) due to excessive rate

·         The version of OSK-plugin-ovs-agent is 2013.1.1-0ubuntu1

·         The result of the above being that "br-tun DOES NOT have gre-2 / gre-1 port on it" for both compute and network..

Please let me know what could be done to:

1.       get the ovs-agent running on compute

2.       have VMs pingable
================================================================================================================
compute Node output:
root@computenode:~# ovs-vsctl show
4aad5da2-861d-4190-a50b-37dfc5ca237a
    Bridge br-tun
        Port patch-int
            Interface patch-int
                type: patch
                options: {peer=patch-tun}
        Port br-tun
            Interface br-tun
                type: internal
    Bridge br-int
        Port "qvo47a58f32-be"
            Interface "qvo47a58f32-be"
        Port "qvo19e7cd4c-c0"
            tag: 1
            Interface "qvo19e7cd4c-c0"
        Port "qvobaa01ac1-69"
            tag: 1
            Interface "qvobaa01ac1-69"
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port br-int
            Interface br-int
                type: internal
    ovs_version: "1.4.0+build0"

================================================================================================================

Network node output:

root@networknode:~# ovs-vsctl show
9e17bb8c-d69d-48ab-9333-b22447c0c268
    Bridge br-tun
        Port patch-int
            Interface patch-int
                type: patch
                options: {peer=patch-tun}
        Port br-tun
            Interface br-tun
                type: internal
    Bridge br-int
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port br-int
            Interface br-int
                type: internal
        Port "qr-a7ab3f7c-8e"
            Interface "qr-a7ab3f7c-8e"
                type: internal
        Port "tap6a322215-f0"
            tag: 1
            Interface "tap6a322215-f0"
                type: internal
    Bridge br-ex
        Port br-ex
            Interface br-ex
                type: internal
        Port "qg-1d552cbd-a0"
            Interface "qg-1d552cbd-a0"
                type: internal
        Port "eth2"
            Interface "eth2"
    ovs_version: "1.4.0+build0"


Thanks and Regards,
Rashmi S N