[Bug 1939723] Re: neutron-ovn-db-sync generates insufficient flow

[Nguyen Thanh Cong]

Hello,

Now I haven't any openstack cluster for testing, nikhil please help me
test it.

Step for reproduce and testing:
1. Create a VM (get neutron port_id, example xxxxx)
2. ovn-nbctl --no-leader-only list port_group neutron_pg_drop | grep xxxxx
--> port xxxxx in port_group neutron_pg_drop


3. Disable port security
4. ovn-nbctl --no-leader-only list port_group neutron_pg_drop | grep xxxxx
--> port xxxxx removed from port_group neutron_pg_drop

5. Remove NB & SB DB
6. Run command neutron-ovn-db-sync-util to resync from neutron to NB database
neutron-ovn-db-sync-util --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --ovn-neutron_sync_mode repair
- Restart ovn-controller in all controller and compute
7. ovn-nbctl --no-leader-only list port_group neutron_pg_drop | grep xxxxx
--> port xxxxx appear in port_group neutron_pg_drop
--> Can't access to this VM (VM still active but can't ping or access to IP)


After this patch, in step 7: port xxxxx not appear in port_group neutron_pg_drop

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https://bugs.launchpad.net/bugs/1939723

Title:
  neutron-ovn-db-sync generates insufficient flow

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive ussuri series:
  Fix Committed
Status in Ubuntu Cloud Archive victoria series:
  Fix Released
Status in Ubuntu Cloud Archive wallaby series:
  Fix Released
Status in Ubuntu Cloud Archive xena series:
  Fix Released
Status in Ubuntu Cloud Archive yoga series:
  Fix Released
Status in Ubuntu Cloud Archive zed series:
  Fix Released
Status in neutron:
  Fix Released
Status in neutron package in Ubuntu:
  Fix Released
Status in neutron source package in Focal:
  Fix Committed

Bug description:
  = Original bug description =

  In OpenStack version Victoria, neutron-ovn-db-sync generates insufficient flow for port no security-group or disable port-security.
  ---> As a result, the port is not connected to the network.

  = Ubuntu SRU details =

  [Impact]
  The neutron-ovn-db-sync tool is used to syncing neutron networks and ports with OVN databases. When the tool is run, ports with port security disabled are incorrectly being added to the drop port group causing all traffic to be dropped by default.

  [Test Case]
  - Create a VM
  - Disable port security
  - Remove NB & SB DB
  - Run command neutron-ovn-db-sync-util to resync from neutron to NB database
  neutron-ovn-db-sync-util --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini --ovn-neutron_sync_mode repair
  - Restart ovn-controller
  - VM with port disable security die without the fix

  [Regression Potential]
  This is a simple patch that fixes the logic of an if statement. This has been fixed in the victoria+ Ubuntu package versions since 2022-01-12, and has been fixed in the upstream stable/ussuri branch since 2021-11-11.

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