[ovs-dev] [ovs-discuss] [OVN] no response to inactivity probe
Tony Liu
tonyliu0592 at hotmail.com
Tue Aug 4 23:46:52 UTC 2020
In that case, I can use set-connection to set one row.
Thanks!
Tony
> -----Original Message-----
> From: Han Zhou <hzhou at ovn.org>
> Sent: Tuesday, August 4, 2020 4:44 PM
> To: Tony Liu <tonyliu0592 at hotmail.com>
> Cc: Numan Siddique <numans at ovn.org>; Han Zhou <hzhou at ovn.org>; ovs-
> discuss <ovs-discuss at openvswitch.org>; ovs-dev <ovs-dev at openvswitch.org>
> Subject: Re: [ovs-discuss] [OVN] no response to inactivity probe
>
>
>
> On Tue, Aug 4, 2020 at 2:50 PM Tony Liu <tonyliu0592 at hotmail.com
> <mailto:tonyliu0592 at hotmail.com> > wrote:
>
>
> Hi,
>
> Since I have 3 OVN DB nodes, should I add 3 rows in connection
> table
> for the inactivity_probe? Or put 3 addresses into one row?
>
> "set-connection" set one row only, and there is no "add-connection".
> How should I add 3 rows into the table connection?
>
>
>
>
> You only need to set one row. Try this command:
>
> ovn-nbctl -- --id=@conn_uuid create Connection
> target="ptcp\:6641\:0.0.0.0" inactivity_probe=0 -- set NB_Global .
> connections=@conn_uuid
>
>
>
> Thanks!
>
> Tony
>
> > -----Original Message-----
> > From: Numan Siddique <numans at ovn.org <mailto:numans at ovn.org> >
> > Sent: Tuesday, August 4, 2020 12:36 AM
> > To: Tony Liu <tonyliu0592 at hotmail.com
> <mailto:tonyliu0592 at hotmail.com> >
> > Cc: ovs-discuss <ovs-discuss at openvswitch.org <mailto:ovs-
> discuss at openvswitch.org> >; ovs-dev <ovs-
> > dev at openvswitch.org <mailto:dev at openvswitch.org> >
> > Subject: Re: [ovs-discuss] [OVN] no response to inactivity probe
> >
> >
> >
> > On Tue, Aug 4, 2020 at 9:12 AM Tony Liu <tonyliu0592 at hotmail.com
> <mailto:tonyliu0592 at hotmail.com>
> > <mailto:tonyliu0592 at hotmail.com
> <mailto:tonyliu0592 at hotmail.com> > > wrote:
> >
> >
> > In my deployment, on each Neutron server, there are 13
> Neutron
> > server processes.
> > I see 12 of them (monitor, maintenance, RPC, API) connect
> to both
> > ovn-nb-db
> > and ovn-sb-db. With 3 Neutron server nodes, that's 36 OVSDB
> clients.
> > Is so many clients OK?
> >
> > Any suggestions how to figure out which side doesn't
> respond the
> > probe,
> > if it's bi-directional? I don't see any activities from
> logging,
> > other than
> > connect/drop and reconnect...
> >
> > BTW, please let me know if this is not the right place to
> discuss
> > Neutron OVN
> > ML2 driver.
> >
> >
> > Thanks!
> >
> > Tony
> >
> > > -----Original Message-----
> > > From: dev <ovs-dev-bounces at openvswitch.org <mailto:ovs-
> dev-bounces at openvswitch.org> <mailto:ovs-dev- <mailto:ovs-dev->
> > bounces at openvswitch.org <mailto:bounces at openvswitch.org> > > On
> Behalf Of Tony Liu
> > > Sent: Monday, August 3, 2020 7:45 PM
> > > To: ovs-discuss <ovs-discuss at openvswitch.org <mailto:ovs-
> discuss at openvswitch.org> <mailto:ovs- <mailto:ovs->
> > discuss at openvswitch.org <mailto:discuss at openvswitch.org> > >;
> ovs-dev <ovs-
> > > dev at openvswitch.org <mailto:dev at openvswitch.org>
> <mailto:dev at openvswitch.org <mailto:dev at openvswitch.org> > >
> > > Subject: [ovs-dev] [OVN] no response to inactivity probe
> > >
> > > Hi,
> > >
> > > Neutron OVN ML2 driver was disconnected by ovn-nb-db.
> There are
> > many
> > > error messages from ovn-nb-db leader.
> > > ========
> > > 2020-08-
> 04T02:31:39.751Z|03138|reconnect|ERR|tcp:10.6.20.81:58620
> <http://10.6.20.81:58620>
> > <http://10.6.20.81:58620> : no
> > > response to inactivity probe after 5 seconds,
> disconnecting
> > > 2020-08-
> 04T02:31:42.484Z|03139|reconnect|ERR|tcp:10.6.20.81:58300
> <http://10.6.20.81:58300>
> > <http://10.6.20.81:58300> : no
> > > response to inactivity probe after 5 seconds,
> disconnecting
> > > 2020-08-
> 04T02:31:49.858Z|03140|reconnect|ERR|tcp:10.6.20.81:59582
> <http://10.6.20.81:59582>
> > <http://10.6.20.81:59582> : no
> > > response to inactivity probe after 5 seconds,
> disconnecting
> > > 2020-08-
> 04T02:31:53.057Z|03141|reconnect|ERR|tcp:10.6.20.83:42626
> <http://10.6.20.83:42626>
> > <http://10.6.20.83:42626> : no
> > > response to inactivity probe after 5 seconds,
> disconnecting
> > > 2020-08-
> 04T02:31:53.058Z|03142|reconnect|ERR|tcp:10.6.20.82:45412
> <http://10.6.20.82:45412>
> > <http://10.6.20.82:45412> : no
> > > response to inactivity probe after 5 seconds,
> disconnecting
> > > 2020-08-
> 04T02:31:54.067Z|03143|reconnect|ERR|tcp:10.6.20.81:59416
> <http://10.6.20.81:59416>
> > <http://10.6.20.81:59416> : no
> > > response to inactivity probe after 5 seconds,
> disconnecting
> > > 2020-08-
> 04T02:31:54.809Z|03144|reconnect|ERR|tcp:10.6.20.81:60004
> <http://10.6.20.81:60004>
> > <http://10.6.20.81:60004> : no
> > > response to inactivity probe after 5 seconds,
> disconnecting
> > ========
> > >
> > > Could anyone share a bit details how this inactivity
> probe works?
> >
> >
> >
> > The inactivity probe is sent by both the server and clients
> > independently.
> > Meaning ovsdb-server will send an inactivity probe every 'x'
> configured
> > seconds to all its connected clients and if it doesn't get a
> reply from
> > the client within some time, it disconnects the connection.
> >
> > The inactivity probe from the server side can be configured. Run
> "ovn-
> > nbctl list connection"
> > and you will see inactivity_probe column. You can set this column
> to
> > desired value like - ovn-nbctl set connection .
> inactivity_probe=30000
> > (for 30 seconds)
> >
> > The same thing for SB ovsdb-server.
> >
> > Similarly each client (ovn-northd, ovn-controller, neutron server)
> sends
> > inactivity probe every 'y' seconds and if the client doesn't get
> any
> > reply from ovsdb-server it will disconnect the connection and
> reconnect
> > again.
> >
> > For ovn-northd you can configured this as - ovn-nbctl set
> NB_Global .
> > options:northd_probe_interval=30000
> >
> > For ovn-controllers - ovs-vsctl set open . external_ids:ovn-
> remote-
> > probe-interval=30000
> >
> > There is also a probe interval for openflow connection from ovn-
> > controller to ovs-vswitchd which you can configure as ovs-vsctl
> set
> > open . external_ids:ovn-openflow-probe-interval=30 (this is in
> seconds)
> >
> >
> > Regarding the neutron server I think it is set to 60 seconds.
> Please see
> > this -
> >
> https://github.com/openstack/neutron/blob/master/neutron/conf/plugins/ml
> > 2/drivers/ovn/ovn_conf.py#L80
> >
> > From the logs you shared, it looks like ovsdb-server is not
> getting the
> > probe reply from neutron server after 5 seconds and hence it is
> > disconnecting. Not sure what's happening though.
> >
> > You can try increasing the inactivity probe interval on the
> ovsdb-server
> > side with the first command I shared.
> > Note: If "ovn-nbctl list connection" returns empty, you need to
> create a
> > connection row like - ovn-nbctl set-connection ptcp:6641:<IP>
> >
> >
> > Thanks
> > Numan
> >
> >
> >
> >
> > > From OVN ML2 driver log, I see it connected to the leader,
> then
> > the
> > > connection was closed by leader after 5 or 6 seconds. Is
> this
> > probe one-
> > > way or two-ways?
> > > Both sides are not busy, not taking much CPU cycles. Not
> sure how
> > this
> > > could happen. Any thoughts?
> > >
> > >
> > > Thanks!
> > >
> > > Tony
> > >
> > >
> > >
> > > _______________________________________________
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> >
> >
>
>
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