enabling uplink_status_propagation ML2 extension is not supported

[Przemyslaw Lal]

The ML2 extension "uplink_status_propagation" allows to configure SR-IOV VFs in a way that makes them to follow their PFs link state instead of enforcing their link state to be always UP.

Currently, this config option isn't exposed in any way in OVN or neutron charms.

Feature that we'd like to see configurable through charm config was developed as part of [0].

Example use case: bonding of VF interfaces inside a VM. When both VFs have a "link-state: enable" (the only possible configuration with current limitations), one will not get the benefit of bonding when the PF link's state goes down (e.g. network switch failure). The instance won't be aware of that fact as both VFs will be reported as UP, and will send 50% of network traffic into a black hole.

[0] https://bugs.launchpad.net/neutron/+bug/1722720

[Przemyslaw Lal (przemeklal)]

Tests confirmed that neutron-api config change is enough to make this work cluster-wide.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/charm-neutron-api/+/818750

[Aurelien Lourot (aurelien-lourot)]

Added charm-guide so we write an entry to the release notes

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-neutron-api/+/818750
Committed: https://opendev.org/openstack/charm-neutron-api/commit/3e387d591869b714be1c323f240fcaff289b3c10
Submitter: "Zuul (22348)"
Branch: master

commit 3e387d591869b714be1c323f240fcaff289b3c10
Author: Diko Parvanov <email address hidden>
Date: Mon Nov 22 12:24:53 2021 +0200

    Adding uplink_status_propagation option

    Add charm option uplink-status-propagation, which for releases >= stein
    will add the ml2 plugin uplink_status_propagation, that enabled ports to
    have the propagate_uplink_status attribute to allow instance VF to see the PF
    link state change for SR-IOV ports.

    Change-Id: I4f1ace630c74363057b0bbdbc759c482125ad015
    Closes-Bug: 1949491

[Felipe Reyes (freyes)]

Targeting this bug to the stable releases based on the need expressed at https://bugs.launchpad.net/charm-neutron-api/+bug/2045215

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/xena
Review: https://review.opendev.org/c/openstack/charm-neutron-api/+/902340

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/train
Review: https://review.opendev.org/c/openstack/charm-neutron-api/+/902341

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ussuri
Review: https://review.opendev.org/c/openstack/charm-neutron-api/+/902342

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/victoria
Review: https://review.opendev.org/c/openstack/charm-neutron-api/+/902343

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/wallaby
Review: https://review.opendev.org/c/openstack/charm-neutron-api/+/902344

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Elod Illes <email address hidden>" on branch: stable/train
Review: https://review.opendev.org/c/openstack/charm-neutron-api/+/902341
Reason: Train is about to transition to End of Life. Open patches needs to be abandoned before branch deletion.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-neutron-api/+/902340
Committed: https://opendev.org/openstack/charm-neutron-api/commit/6f303256517588d9e1ac530150d419c7f8573fd8
Submitter: "Zuul (22348)"
Branch: stable/xena

commit 6f303256517588d9e1ac530150d419c7f8573fd8
Author: Diko Parvanov <email address hidden>
Date: Mon Nov 22 12:24:53 2021 +0200

    Adding uplink_status_propagation option

    Add charm option uplink-status-propagation, which for releases >= stein
    will add the ml2 plugin uplink_status_propagation, that enabled ports to
    have the propagate_uplink_status attribute to allow instance VF to see the PF
    link state change for SR-IOV ports.

    Change-Id: I4f1ace630c74363057b0bbdbc759c482125ad015
    Partial-Bug: 1949491
    (cherry picked from commit 3e387d591869b714be1c323f240fcaff289b3c10)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-neutron-api/+/902344
Committed: https://opendev.org/openstack/charm-neutron-api/commit/11a8d64774b81b358211792e11a62ca66aaed1ab
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit 11a8d64774b81b358211792e11a62ca66aaed1ab
Author: Diko Parvanov <email address hidden>
Date: Mon Nov 22 12:24:53 2021 +0200

    Adding uplink_status_propagation option

    Add charm option uplink-status-propagation, which for releases >= stein
    will add the ml2 plugin uplink_status_propagation, that enabled ports to
    have the propagate_uplink_status attribute to allow instance VF to see the PF
    link state change for SR-IOV ports.

    Change-Id: I4f1ace630c74363057b0bbdbc759c482125ad015
    Partial-Bug: 1949491
    (cherry picked from commit 6f303256517588d9e1ac530150d419c7f8573fd8)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-neutron-api/+/902343
Committed: https://opendev.org/openstack/charm-neutron-api/commit/6243b39c150cb0d386730b61db5b5c3d15423a47
Submitter: "Zuul (22348)"
Branch: stable/victoria

commit 6243b39c150cb0d386730b61db5b5c3d15423a47
Author: Diko Parvanov <email address hidden>
Date: Mon Nov 22 12:24:53 2021 +0200

    Adding uplink_status_propagation option

    Add charm option uplink-status-propagation, which for releases >= stein
    will add the ml2 plugin uplink_status_propagation, that enabled ports to
    have the propagate_uplink_status attribute to allow instance VF to see the PF
    link state change for SR-IOV ports.

    Change-Id: I4f1ace630c74363057b0bbdbc759c482125ad015
    Partial-Bug: 1949491
    (cherry picked from commit 3e387d591869b714be1c323f240fcaff289b3c10)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-neutron-api/+/902342
Committed: https://opendev.org/openstack/charm-neutron-api/commit/7dca5dd22a664e2c161c0d4f6e5dbef8b1d10893
Submitter: "Zuul (22348)"
Branch: stable/ussuri

commit 7dca5dd22a664e2c161c0d4f6e5dbef8b1d10893
Author: Diko Parvanov <email address hidden>
Date: Mon Nov 22 12:24:53 2021 +0200

    Adding uplink_status_propagation option

    Add charm option uplink-status-propagation, which for releases >= stein
    will add the ml2 plugin uplink_status_propagation, that enabled ports to
    have the propagate_uplink_status attribute to allow instance VF to see the PF
    link state change for SR-IOV ports.

    Change-Id: I4f1ace630c74363057b0bbdbc759c482125ad015
    Partial-Bug: 1949491
    (cherry picked from commit 3e387d591869b714be1c323f240fcaff289b3c10)

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Danny Cocks <email address hidden>" on branch: stable/train
Review: https://review.opendev.org/c/openstack/charm-neutron-api/+/902341
Reason: See comment above - backport is not needed for train and it is now EoL