[Bug 1899369] Re: ovn-controller: Disable ofctrl probe by default

[James Page]

** Description changed:

- A change [0] prior to the release of OVN v20.03.0 introduced a change of
- behavior where the inactivity probe for the ofctrl connection defaults
- to 5 seconds. Since this normally is a unix socket the default was not
- to have a inactivity probe at all.
+ [Impact]
+ 
+ 
+ [Test Case]
+ 
+ 
+ [Regression Potential]
+ 
+ 
+ [Original Bug Report]
+ A change [0] prior to the release of OVN v20.03.0 introduced a change of behavior where the inactivity probe for the ofctrl connection defaults to 5 seconds. Since this normally is a unix socket the default was not to have a inactivity probe at all.
  
  On a busy system a inactivity probe of 5 seconds is not enough for the
  OVN Controller to complete programming of the switch.
  
  The change of behavior was corrected in [1] and I think it would be
  beneficial if Ubuntu backported this fix to the OVN package rather than
  having charms and/or end users work around the issue by manually
  configuring the timeout through the `external-ids:ovn-openflow-probe-
  interval` key in the Open_vSwitch table.
  
  Symptoms of this problem is that a OVN controller is either unable to do
  initial programming of a switch for a host with many ports and flows or
  that updates are lost on a functional system. The following will be
  printed in the log:
  
  2020-10-11T18:56:09.355Z|30186|rconn|ERR|unix:/var/run/openvswitch/br-
  int.mgmt: no response to inactivity probe after 5 seconds, disconnecting
  
  0: https://github.com/ovn-org/ovn/commit/c99069c8934c9ea55d310a8b6d48fb66aa477589
  1: https://github.com/ovn-org/ovn/commit/b8af8549396e62d6523be18e104352e334825783

** Also affects: ovn (Ubuntu Groovy)
   Importance: Undecided
       Status: New

** Also affects: ovn (Ubuntu Hirsute)
   Importance: High
       Status: Triaged

** Also affects: ovn (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: ovn (Ubuntu Hirsute)
       Status: Triaged => Fix Released

** Changed in: ovn (Ubuntu Groovy)
       Status: New => Triaged

** Changed in: ovn (Ubuntu Focal)
       Status: New => Triaged

** Changed in: ovn (Ubuntu Focal)
   Importance: Undecided => High

** Changed in: ovn (Ubuntu Groovy)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1899369

Title:
  ovn-controller: Disable ofctrl probe by default

Status in ovn package in Ubuntu:
  Fix Released
Status in ovn source package in Focal:
  Triaged
Status in ovn source package in Groovy:
  Triaged
Status in ovn source package in Hirsute:
  Fix Released

Bug description:
  [Impact]

  
  [Test Case]

  
  [Regression Potential]

  
  [Original Bug Report]
  A change [0] prior to the release of OVN v20.03.0 introduced a change of behavior where the inactivity probe for the ofctrl connection defaults to 5 seconds. Since this normally is a unix socket the default was not to have a inactivity probe at all.

  On a busy system a inactivity probe of 5 seconds is not enough for the
  OVN Controller to complete programming of the switch.

  The change of behavior was corrected in [1] and I think it would be
  beneficial if Ubuntu backported this fix to the OVN package rather
  than having charms and/or end users work around the issue by manually
  configuring the timeout through the `external-ids:ovn-openflow-probe-
  interval` key in the Open_vSwitch table.

  Symptoms of this problem is that a OVN controller is either unable to
  do initial programming of a switch for a host with many ports and
  flows or that updates are lost on a functional system. The following
  will be printed in the log:

  2020-10-11T18:56:09.355Z|30186|rconn|ERR|unix:/var/run/openvswitch/br-
  int.mgmt: no response to inactivity probe after 5 seconds,
  disconnecting

  0: https://github.com/ovn-org/ovn/commit/c99069c8934c9ea55d310a8b6d48fb66aa477589
  1: https://github.com/ovn-org/ovn/commit/b8af8549396e62d6523be18e104352e334825783

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