Reviewed: https://review.openstack.org/558137
Committed:
https://git.openstack.org/cgit/openstack/neutron/commit/?id=ff5e8d7d6cdc6ce3cd93aededec512e1855f6c28
Submitter: Zuul
Branch: master
commit ff5e8d7d6cdc6ce3cd93aededec512e1855f6c28
Author: Dmitrii Shcherbakov <dmitrii.shcherba...@canonical.com>
Date: Sun Apr 1 21:02:10 2018 -0400
Refresh router objects after port binding
Post-binding information about router ports is missing in results of RPC
calls made by l3 agents. sync_routers code ensures that bindings are
present, however, it does not refresh router objects before returning
them - for RPC clients ports remain unbound before the next sync and
there is no necessary address scope information present to create routes
from fip namespaces to qrouter namespaces.
Change-Id: Ia135f0ed7ca99887d5208fa78fe4df1ff6412c26
Closes-Bug: #1759971
** Changed in: neutron
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1759971
Title:
[dvr][fast-exit] a route to a tenant network does not get created in
fip namespace if an external network is attached after a tenant
network have been attached (race condition)
Status in neutron:
Fix Released
Bug description:
Overall, similar scenario to
https://bugs.launchpad.net/neutron/+bug/1759956 but a different
problem.
Relevant agent config options:
http://paste.openstack.org/show/718418/
OpenStack Queens from UCA (xenial, GA kernel, deployed via OpenStack
charms), 2 external subnets (one routed provider network), 1 tenant
subnet, all subnets in the same address scope to trigger "fast exit"
logic.
Tenant subnet cidr: 192.168.100.0/24
openstack address scope create dev
openstack subnet pool create --address-scope dev --pool-prefix 10.232.40.0/21
--pool-prefix 10.232.16.0/21 dev
openstack subnet pool create --address-scope dev --pool-prefix
192.168.100.0/24 tenant
openstack network create --external --provider-physical-network physnet1
--provider-network-type flat pubnet
openstack network segment set --name segment1
d8391bfb-4466-4a45-972c-45ffcec9f6bc
openstack network segment create --physical-network physnet2 --network-type
flat --network pubnet segment2
openstack subnet create --no-dhcp --subnet-pool dev --subnet-range
10.232.16.0/21 --allocation-pool start=10.232.17.0,end=10.232.17.255
--dns-nameserver 10.232.36.101 --ip-version 4 --network pubnet
--network-segment segment1 pubsubnetl1
openstack subnet create --gateway 10.232.40.100 --no-dhcp --subnet-pool dev
--subnet-range 10.232.40.0/21 --allocation-pool
start=10.232.41.0,end=10.232.41.255 --dns-nameserver 10.232.36.101 --ip-version
4 --network pubnet --network-segment segment2 pubsubnetl2
openstack network create --internal --provider-network-type vxlan tenantnet
openstack subnet create --dhcp --ip-version 4 --subnet-range
192.168.100.0/24 --subnet-pool tenant --dns-nameserver 10.232.36.101 --network
tenantnet tenantsubnet
# -------
# Works in this order when an external network is attached first
openstack router create --disable --no-ha --distributed pubrouter
openstack router set --disable-snat --external-gateway pubnet --enable
pubrouter
openstack router add subnet pubrouter tenantsubnet
2018-03-29 23:30:48.933 2050638 DEBUG neutron.agent.linux.utils [-] Running
command: ['sudo', 'neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'ne
tns', 'exec', 'fip-d0f008fc-dc45-4237-9ce0-a9e1977735eb', 'ip', '-4',
'route', 'replace', '192.168.100.0/24', 'via', '169.254.106.114', 'dev',
'fpr-09fd1
424-7'] create_process
/usr/lib/python2.7/dist-packages/neutron/agent/linux/utils.py:92
# ------
# Doesn't work the other way around - as a fip namespace does not get created
before a tenant network is attached
openstack router create --disable --no-ha --distributed pubrouter
openstack router add subnet pubrouter tenantsubnet
openstack router set --disable-snat --external-gateway pubnet --enable
pubrouter
# to "fix" this we need to re-trigger the right code path
openstack router remove subnet pubrouter tenantsubnet
openstack router add subnet pubrouter tenantsubnet
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