Comment 13 for bug 1929821

Reviewed: https://review.opendev.org/c/openstack/neutron/+/810425
Committed: https://opendev.org/openstack/neutron/commit/7eaa84a0cd48adb2ecd7653640d32aea8096e786
Submitter: "Zuul (22348)"
Branch: stable/ussuri

commit 7eaa84a0cd48adb2ecd7653640d32aea8096e786
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Thu Jun 3 14:49:45 2021 +0000

    Populate self.floating_ips_dict using "ip rule" information

    When the L3 agent starts, reads the floating IP rule priority from
    a state file created by "FipRulePriorityAllocator". In case of not
    having all floating IPs registers in this file, the method:
    - Creates a new priority for this floating IP.
    - Creates the "ip rule" in the namespace.
    - Adds a new entry in "self.floating_ips_dict".

    All "ip rules" present in the namespace that do not match the
    registered fixed IP address ("from") and the priority assigned
    are deleted.

    Closes-Bug: #1891673
    Closes-Bug: #1929821

    Conflicts:
        neutron/tests/unit/agent/l3/test_dvr_local_router.py

    Change-Id: Ia3fbde3304ab5f3c309dc62dbf58274afbcf4614
    (cherry picked from commit a03c240ef4ea1d4b874b618dbd0163a3a2f7024c)
    (cherry picked from commit b4ad1a2775d00cd6d14bd4766a0a1c5c41332d89)