[ovs-discuss] Inactivity Probe configuration not taking effect in OVS 2.14.0

Shobhit Khandelwal shobhit.khandelwal at nutanix.com
Tue May 25 04:53:20 UTC 2021


Hi,

We are seeing an issue in OVS 2.14.0 after moving from 2.8.0. We first set the controller on the bridge and then set inactivity probe for our controller to 0 to disable new connection attempts by ovs. After this we start our controller to serve request. But in the new version of OVS somehow we still see inactivity probe kicking in after every 5s and trying to reconnect. This issue is triggered when we are in the middle of handling a packet in our (I,e OFcontroller) which is blocked for almost like 40s.

Kernel version: CentOS Linux release 7.9.2009
Output of ovs-vsctl list controller command shows inactivity_probe: 0

Below is the snippet from ovs-vswitchd.log
021-05-11T22:32:55.378Z|00608|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connected
2021-05-11T22:33:05.382Z|00609|connmgr|INFO|br0.uvms<->tcp:127.0.0.1:6653: 44 flow_mods 10 s ago (44 adds)
2021-05-11T22:33:05.386Z|00610|rconn|ERR|br0.uvms<->tcp:127.0.0.1:6653: no response to inactivity probe after 5 seconds, disconnecting
2021-05-11T22:33:06.406Z|00611|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connecting...
2021-05-11T22:33:06.438Z|00612|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connected
2021-05-11T22:33:16.438Z|00613|rconn|ERR|br0.uvms<->tcp:127.0.0.1:6653: no response to inactivity probe after 5 seconds, disconnecting
2021-05-11T22:33:17.921Z|00614|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connecting...
2021-05-11T22:33:18.108Z|00615|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connected
2021-05-11T22:33:28.110Z|00616|rconn|ERR|br0.uvms<->tcp:127.0.0.1:6653: no response to inactivity probe after 5 seconds, disconnecting
2021-05-11T22:33:29.433Z|00617|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connecting...
2021-05-11T22:33:29.933Z|00618|rconn|INFO|br0.uvms<->tcp:127.0.0.1:6653: connected

Can you please help us find out what could be wrong with this configuration and what is the expected behavior from ovs switch when the receiver on the controller is blocked for long.

Thanks,
Shobhit

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