ovn-octavia loadbalancer not working when VIP is on a dual-stack provider network

[Luis Tomas Bolivar]

If an octavia loadbalancer is created with OVN provider, on a provider network which has dual-stack (ipv4 and ipv6 subnets), the next error happens:

2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper [-] Exception occurred during creation of loadbalancer: ValueError: IPAddress() does not support netmasks or subnet prefixes! See documentation for details.
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper Traceback (most recent call last):
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper File "/usr/lib/python3.6/site-packages/netaddr/ip/__init__.py", line 803, in parse_ip_network
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper prefixlen = int(val2)
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper ValueError: invalid literal for int() with base 10: '24 2001:db8::f816:3eff:fed5:a9e1/64'
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper During handling of the above exception, another exception occurred:
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper Traceback (most recent call last):
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper File "/usr/lib/python3.6/site-packages/ovn_octavia_provider/helper.py", line 873, in lb_create
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper ovn_lr = self._find_lr_of_ls(ovn_ls, subnet.get('gateway_ip'))
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper File "/usr/lib/python3.6/site-packages/ovn_octavia_provider/helper.py", line 640, in _find_lr_of_ls
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper port.external_ids['neutron:cidrs']).ip
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper File "/usr/lib/python3.6/site-packages/netaddr/ip/__init__.py", line 928, in __init__
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper implicit_prefix, flags)
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper File "/usr/lib/python3.6/site-packages/netaddr/ip/__init__.py", line 810, in parse_ip_network
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper mask = IPAddress(val2, module.version, flags=INET_PTON)
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper File "/usr/lib/python3.6/site-packages/netaddr/ip/__init__.py", line 280, in __init__
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper % self.__class__.__name__)
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper ValueError: IPAddress() does not support netmasks or subnet prefixes! See documentation for details.
2022-02-03 09:19:04.234 12 ERROR ovn_octavia_provider.helper
2022-02-03 09:19:04.942 12 WARNING ovn_octavia_provider.helper [-] Deleting the VIP port 7b6bc45c-ff51-45e3-81ef-7b596528ff44 since LB went into ERROR state

This is due to logical ports associated to the provider network logical switch have both ipv4 and ipv6 into the "neutron:cidrs" field at external_ids:
ovn-nbctl list logical_switch_port 0016d6d0-b8cb-4542-b6fe-840740eef9f0
_uuid : 0016d6d0-b8cb-4542-b6fe-840740eef9f0
addresses : [router]
dhcpv4_options : []
dhcpv6_options : []
dynamic_addresses : []
enabled : true
external_ids : {"neutron:cidrs"="172.24.100.198/24 2001:db8::f816:3eff:fed5:a9e1/64", "neutron:device_id"="142845e4-3424-4b19-a02a-6bfed63efb8f", "neutron:device_owner"="network:router_gateway", "neutron:network_name"=neutron-b1f7e9be-2c18-4f68-9253-ca2bcbb904a1, "neutron:port_name"="", "neutron:project_id"="", "neutron:revision_number"="5", "neutron:security_group_ids"="", "neutron_bgpvpn:as"="64999", "neutron_bgpvpn:vni"="1001"}
ha_chassis_group : []
name : "6b7aa199-b715-4585-a88b-30f276961995"
options : {nat-addresses=router, router-port=lrp-6b7aa199-b715-4585-a88b-30f276961995}
parent_name : []
port_security : []
tag : []
tag_request : []
type : router
up : true

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/827670

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/827670
Committed: https://opendev.org/openstack/ovn-octavia-provider/commit/1ac25e88140cd0fc2111fe0c91cb7162e2d8399a
Submitter: "Zuul (22348)"
Branch: master

commit 1ac25e88140cd0fc2111fe0c91cb7162e2d8399a
Author: Luis Tomas Bolivar <email address hidden>
Date: Thu Feb 3 14:48:39 2022 +0100

    Allow to create ovn loadbalancer on dual-stack provider networks

    This patch ensures that loadbalancer can be created with the VIP
    on the provider networks when they are dual-stack (ipv4 and ipv6
    subnets).

    Closes-Bug: #1959903
    Change-Id: Ic0e6c02defb5c98791a3c3d99ff2b7cfc0ccfe2e

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/xena
Review: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/829439

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/wallaby
Review: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/829440

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/victoria
Review: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/829441

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ussuri
Review: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/830150

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/829439
Committed: https://opendev.org/openstack/ovn-octavia-provider/commit/9ba304df099b398f2439a0ae7c1b73f5af633d10
Submitter: "Zuul (22348)"
Branch: stable/xena

commit 9ba304df099b398f2439a0ae7c1b73f5af633d10
Author: Luis Tomas Bolivar <email address hidden>
Date: Thu Feb 3 14:48:39 2022 +0100

    Allow to create ovn loadbalancer on dual-stack provider networks

    This patch ensures that loadbalancer can be created with the VIP
    on the provider networks when they are dual-stack (ipv4 and ipv6
    subnets).

    Closes-Bug: #1959903
    Change-Id: Ic0e6c02defb5c98791a3c3d99ff2b7cfc0ccfe2e
    (cherry picked from commit 1ac25e88140cd0fc2111fe0c91cb7162e2d8399a)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/829440
Committed: https://opendev.org/openstack/ovn-octavia-provider/commit/dea57c85d97c764e263bb5161429b6d53f4488be
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit dea57c85d97c764e263bb5161429b6d53f4488be
Author: Luis Tomas Bolivar <email address hidden>
Date: Thu Feb 3 14:48:39 2022 +0100

    Allow to create ovn loadbalancer on dual-stack provider networks

    This patch ensures that loadbalancer can be created with the VIP
    on the provider networks when they are dual-stack (ipv4 and ipv6
    subnets).

    Closes-Bug: #1959903
    Change-Id: Ic0e6c02defb5c98791a3c3d99ff2b7cfc0ccfe2e
    (cherry picked from commit 1ac25e88140cd0fc2111fe0c91cb7162e2d8399a)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/829441
Committed: https://opendev.org/openstack/ovn-octavia-provider/commit/7a51f79d62d092651f3eac272e914dbdaff9e160
Submitter: "Zuul (22348)"
Branch: stable/victoria

commit 7a51f79d62d092651f3eac272e914dbdaff9e160
Author: Luis Tomas Bolivar <email address hidden>
Date: Thu Feb 3 14:48:39 2022 +0100

    Allow to create ovn loadbalancer on dual-stack provider networks

    This patch ensures that loadbalancer can be created with the VIP
    on the provider networks when they are dual-stack (ipv4 and ipv6
    subnets).

    NOTE: added neutron_lib import constants to make use of the same
    constant used in master, otherwise pep8 gate was failing.

    Closes-Bug: #1959903
    Change-Id: Ic0e6c02defb5c98791a3c3d99ff2b7cfc0ccfe2e
    (cherry picked from commit 1ac25e88140cd0fc2111fe0c91cb7162e2d8399a)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/830150
Committed: https://opendev.org/openstack/ovn-octavia-provider/commit/0c196f1f1b30fa657272ad6dcfe638b4f4064ce7
Submitter: "Zuul (22348)"
Branch: stable/ussuri

commit 0c196f1f1b30fa657272ad6dcfe638b4f4064ce7
Author: Luis Tomas Bolivar <email address hidden>
Date: Mon Feb 21 13:11:19 2022 +0100

    Allow to create ovn loadbalancer on dual-stack provider networks

    This patch ensures that loadbalancer can be created with the VIP
    on the provider networks when they are dual-stack (ipv4 and ipv6
    subnets).

    Closes-Bug: #1959903
    (manually cherry picked from commit 1ac25e88140cd0fc2111fe0c91cb7162e2d8399a)

    Change-Id: Ic0e6c02defb5c98791a3c3d99ff2b7cfc0ccfe2e

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ovn-octavia-provider 2.0.0.0rc1 release candidate.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ovn-octavia-provider 1.0.1 release.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/networking-ovn train-eol release.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ovn-octavia-provider 1.2.0 release.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ovn-octavia-provider ussuri-eol release.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ovn-octavia-provider victoria-eom release.