yahoo-eng-team team mailing list archive

[Kevin Carter <2099818@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

RFE: OVN "Add-Only" Sync Mode

In an effort to enhance operational safety and flexibility, we propose
the introduction of an "add-only" synchronization mode for OVN
integration within Neutron. This mode is designed to ensure that Neutron
only adds records to the OVN database when they are missing, without
deleting any existing records. This is particularly important in
environments where a shared OVN deployment is leveraged outside of
OpenStack or in hybrid settings where external management is also in
play. By enabling this mode, either through the command-line option
`--ovn-neutron_sync_mode=add` or by setting `ovn.neutron_sync_mode` to
"add" in the configuration file, administrators can prevent accidental
record deletion, which is crucial for maintaining data integrity in
complex deployments.

Recent development efforts have already implemented this functionality,
as highlighted in the commit message "feat(OVN): add new mode to only
add when missing." The changes update the synchronization class to
bypass any deletion operations when operating in this "add" mode,
thereby ensuring that only missing records are added to the OVN
database. Comprehensive tests using a repair setup have confirmed that
no delete calls are made under this configuration.

This enhancement not only mitigates the risk of unintended network loss
but also provides a safer, more controlled method for managing OVN
records, making it an invaluable option for operators who require
precise control over their network infrastructure.

** Affects: neutron
     Importance: Undecided
         Status: In Progress

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https://bugs.launchpad.net/bugs/2099818

Title:
  ovn-sync add

Status in neutron:
  In Progress

Bug description:
  RFE: OVN "Add-Only" Sync Mode

  In an effort to enhance operational safety and flexibility, we propose
  the introduction of an "add-only" synchronization mode for OVN
  integration within Neutron. This mode is designed to ensure that
  Neutron only adds records to the OVN database when they are missing,
  without deleting any existing records. This is particularly important
  in environments where a shared OVN deployment is leveraged outside of
  OpenStack or in hybrid settings where external management is also in
  play. By enabling this mode, either through the command-line option
  `--ovn-neutron_sync_mode=add` or by setting `ovn.neutron_sync_mode` to
  "add" in the configuration file, administrators can prevent accidental
  record deletion, which is crucial for maintaining data integrity in
  complex deployments.

  Recent development efforts have already implemented this
  functionality, as highlighted in the commit message "feat(OVN): add
  new mode to only add when missing." The changes update the
  synchronization class to bypass any deletion operations when operating
  in this "add" mode, thereby ensuring that only missing records are
  added to the OVN database. Comprehensive tests using a repair setup
  have confirmed that no delete calls are made under this configuration.

  This enhancement not only mitigates the risk of unintended network
  loss but also provides a safer, more controlled method for managing
  OVN records, making it an invaluable option for operators who require
  precise control over their network infrastructure.

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