Open Stack

On Tue, May 23, 2017 at 6:48 PM, pranab boruah <pranabjyotiboruah at gmail.com>
wrote:

> Hi,
> We are building a multi-node physical set-up of OpenStack Newton. The
> goal is to finally integrate the set-up with OVN.
> Lab details:
> 1 Controller, 2 computes
>
> CentOS-7.3, OpenStack Newton, separate network for mgmt and tunnel
> OVS version: 2.6.1
>
> I followed the following guide to deploy OpenStack Newton using the
> PackStack utility:
>
> http://networkop.co.uk/blog/2016/11/27/ovn-part1/
>
> Before I started integrating with OVN, I made sure that the set-up(ML2
> and OVS) was working by launching VMs. VMs on cross compute node were
> able to ping each other.
>
> Now, I followed the official guide for OVN integration:
>
> http://docs.openstack.org/developer/networking-ovn/install.html
>
> Error details :
> Neutron Server log shows :
>
>  ERROR networking_ovn.ovsdb.impl_idl_ovn [-] OVS database connection
> to OVN_Northbound failed with error: '{u'error': u'unknown database',
> u'details': u'get_schema request specifies unknown database
> OVN_Northbound', u'syntax': u'["OVN_Northbound"]'}'. Verify that the
> OVS and OVN services are available and that the 'ovn_nb_connection'
> and 'ovn_sb_connection' configuration options are correct.
>
> The issue is ovsdb-server on the controller binds with the port
> 6641.instead of 6640.
>
>

Hi Pranab,
Normally I have seen this happening when neutron-server (i.e the
networking-ovn ML2 driver) tries to connect to the OVN northbound
ovsdb-server (on port 6641) and fails (mainly because the OVN NB db
ovsdb-server) is not running. In such case the code here [1] runs
"ovs-vsctl add-connection ptcp:6640:.. which causes the main ovsdb-server
(for conf.db) to listen on port 6641.

Can you make sure that ovsdb-server's for OVN are running before the
neutron-server is started.

May be to see if it works you can run "ovs-vsctl del-manager" and then run
netsat -putna | grep 6641 and verify that OVN NB db ovsdb-server listens on
6641.

[1] -
https://github.com/openstack/neutron/blob/stable/newton/neutron/agent/ovsdb/native/connection.py#L82

https://github.com/openstack/neutron/blob/stable/newton/neutron/agent/ovsdb/native/helpers.py#L41

Thanks
Numan

#  netstat -putna | grep 6641
>
> tcp        0      0 192.168.10.10:6641      0.0.0.0:*
> LISTEN      809/ovsdb-server
>
> # netstat -putna | grep 6640 (shows no output)
>
> Now, OVN NB DB tries to listen on port 6641, but since it is used by
> the ovsdb-server, it's unable to. PID of ovsdb-server is 809, while
> the pid of OVN NB DB is 4217.
>
> OVN NB DB logs shows this:
>
> 2017-05-23T12:58:09.444Z|01421|ovsdb_jsonrpc_server|ERR|ptcp:6641:0.0.0.0:
> listen failed: Address already in use
> 2017-05-23T12:58:11.946Z|01422|socket_util|ERR|6641:0.0.0.0: bind:
> Address already in use
> 2017-05-23T12:58:14.448Z|01423|socket_util|ERR|6641:0.0.0.0: bind:
> Address already in use
>
> Solutions I tried:
> 1) Completely fresh installing everything.
> 2) Tried with OVS 2.6.0 and 2.7, same issue on all.
> 3) Checked  and verified : SB and NB configuration options in
> plugin.ini are exactly correct.
>
> Please help. Let me know. if additional details are required.
>
> Thanks,
> Pranab
> _______________________________________________
> discuss mailing list
> discuss at openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
>
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