Public bug reported:
$ neutron router-create cvr-ha-rtr --ha True --distributed False
$ neutron router-interface-add cvr-ha-rtr cvr-ha-subv4
$ neutron router-gateway-set cvr-ha-rtr ext35
Network ext35 does not have an IPv6 subnet, and the physical router on
the vlan is configured to send RAs.
Find the active node:
# ip netns exec qrouter-5aa06109-990f-415d-91f8-90ea7d90de7f \
cat /proc/sys/net/ipv6/conf/qg-7c4435c1-1b/accept_ra
1
This is supposed to be 2 on a router.
Stop the l3-agent on active node to induce a failover to another node.
On the new node:
# ip netns exec qrouter-5aa06109-990f-415d-91f8-90ea7d90de7f \
cat /proc/sys/net/ipv6/conf/qg-7c4435c1-1b/accept_ra
2
And the default v6 route gets configured from the RA.
The problem is that accept_ra gets set to 2 on the transition to master. But if
router-gateway-set has not been run before that time, then it will be skipped
because ri.ex_gw_port does exist:
https://github.com/openstack/neutron/blob/master/neutron/agent/l3/ha.py#L137
** Affects: neutron
Importance: Undecided
Status: New
** Tags: ipv6 l3-ha
** Tags added: l3-ha
** Tags added: ipv6
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https://bugs.launchpad.net/bugs/1585246
Title:
HA router does not receive RA from upstream router
Status in neutron:
New
Bug description:
$ neutron router-create cvr-ha-rtr --ha True --distributed False
$ neutron router-interface-add cvr-ha-rtr cvr-ha-subv4
$ neutron router-gateway-set cvr-ha-rtr ext35
Network ext35 does not have an IPv6 subnet, and the physical router on
the vlan is configured to send RAs.
Find the active node:
# ip netns exec qrouter-5aa06109-990f-415d-91f8-90ea7d90de7f \
cat /proc/sys/net/ipv6/conf/qg-7c4435c1-1b/accept_ra
1
This is supposed to be 2 on a router.
Stop the l3-agent on active node to induce a failover to another node.
On the new node:
# ip netns exec qrouter-5aa06109-990f-415d-91f8-90ea7d90de7f \
cat /proc/sys/net/ipv6/conf/qg-7c4435c1-1b/accept_ra
2
And the default v6 route gets configured from the RA.
The problem is that accept_ra gets set to 2 on the transition to master. But
if router-gateway-set has not been run before that time, then it will be
skipped because ri.ex_gw_port does exist:
https://github.com/openstack/neutron/blob/master/neutron/agent/l3/ha.py#L137
To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/1585246/+subscriptions
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