[Bug 1752838] Re: [SRU] neutron-ovs-cleanup runs earlier than ovsdb-server when there are many port

[Seyeong Kim]

for xenial

I checked that this patch is working.

1. deploy xenial
2. ran script on test case
3. reboot, and check if there is issue on order or failed service
4. upgrade to -proposed pkg
5. reboot, and check if there is issue(it is gone)

Thanks a lot

dpkg -l | grep neutron

ii  neutron-common                       2:8.4.0-0ubuntu7.1                         all          Neutron is a virtual network service for Openstack - common
ii  neutron-openvswitch-agent            2:8.4.0-0ubuntu7.1                         all          Neutron is a virtual network service for Openstack - Open vSwitch plugin agent
rc  neutron-plugin-openvswitch-agent     2:8.4.0-0ubuntu6                           all          Transitional package for neutron-openvswitch-agent
ii  python-neutron                       2:8.4.0-0ubuntu7.1                         all          Neutron is a virtual network service for Openstack - Python library

** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial

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https://bugs.launchpad.net/bugs/1752838

Title:
  [SRU] neutron-ovs-cleanup runs earlier than ovsdb-server when there
  are many port

Status in Ubuntu Cloud Archive:
  Fix Committed
Status in Ubuntu Cloud Archive newton series:
  Fix Committed
Status in Ubuntu Cloud Archive ocata series:
  Fix Committed
Status in Ubuntu Cloud Archive pike series:
  Triaged
Status in Ubuntu Cloud Archive queens series:
  Fix Committed
Status in neutron package in Ubuntu:
  Fix Released
Status in neutron source package in Xenial:
  Fix Committed
Status in neutron source package in Artful:
  Fix Committed
Status in neutron source package in Bionic:
  Fix Released

Bug description:
  [Impact]

  In code, Basically all ubuntu version could be affected.
  I'm trying to do test them

  neutron-ovs-cleanup service runs earlier than ovsdb-server sometimes.

  then, neutron-ovs-cleanup service's status remains failed
  with below error msg

  "ProcessExecutionError: Exit code: 1; Stdin: ; Stdout: ; Stderr: ovs-
  vsctl: unix:/var/run/openvswitch/db.sock: database connection failed
  (No such file or directory)"

  that is fine for booting.

  but.

  If someday upgrade pkgs related to neutron, it runs neutron-ovs-
  cleanup again because it is not in active status.

  eventually, neutron-ovs-cleanup deletes all ports on running compute
  nodes.

  related logs here https://paste.ubuntu.com/p/QkkwP2vPDv/

  [Test Case]

  1. deploy openstack env
  2. run below scripts to add many ports
  #!/bin/bash

  juju ssh nova-compute/0 '
  sudo modprobe dummy
  for i in {1..1000}
  do
    echo $i
    sudo ip link add dummy$i type dummy;sudo ip link set name t-test$i dev dummy$i;sudo ovs-vsctl add-port br-int t-test$i
  done
  '
  3. systemctl list-units --failed
  - check if there is failed neutron-ovs-cleanup service

  [Regression]
  Changes dependency on debian/neutron-openvswitch-agent.neutron-ovs-cleanup.service.in
  need to reboot if this patch is affected. If this symptom is not affected your env. no need to reboot.

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