Error about rfp/fpr veth in log when restarting l3 agent in DVR mode

[Sylvain Afchain]

2014-09-30 21:14:14.636 ERROR neutron.agent.linux.utils [-]
Command: ['sudo', '/usr/local/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-2d8e2ae6-4180-4e43-953d-931189c0a5ae', 'ip', 'link', 'add', 'rfp-2d8e2ae6-4', 'type', 'veth', 'peer', 'name', 'fpr-2d8e2ae6-4', 'netns', 'fip-be1a07de-9d7b-4823-8d01-3091773d794b']
Exit code: 2
Stdout: ''
Stderr: 'RTNETLINK answers: File exists\n'

[Armando Migliaccio (armando-migliaccio)]

Can you provide details about the conditions where this issue manifest itself? A trace log with no context whatsoever is not very useful!

[Sylvain Afchain (sylvain-afchain)]

With a 2 two nodes devstack, with a provider networks type vlan as external network, with a dvr router spawned attached on a private network(vxlan) and the external, when I restart the l3 agent I get the trace.

[huangyunpeng (huangyunpeng)]

In this sense, if i create a fip and associate with a vm port , and I restart the l3 agent ,the floatingip statue comes to error .

[Andrey Alekov (aalekov)]

I'm tried to reproduce this bug in multinode topology. Unfortunately it's not possible. Please provide more information to reproduce bug.

[Sylvain Afchain (sylvain-afchain)]

As Andrey reported all the floating ips are reported as in ERROR state. This seems due to the exception generated by trying to recreate a interface that is already existing.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/136041

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/136041
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=c15923230da2a21d5fdb56c885baa7f3aa045090
Submitter: Jenkins
Branch: master

commit c15923230da2a21d5fdb56c885baa7f3aa045090
Author: Sylvain Afchain <email address hidden>
Date: Thu Nov 20 14:25:58 2014 +0000

    Fix floating-ips in error state in dvr mode

    Before this fix an exception was raised when
    creating the veth between the fip namespace and
    the qrouter namespace when the veth was already
    present.
    This fix add a check to only create the veth if
    not present.

    Change-Id: Iefea9778223aac885bedfdacfdeacfce74776333
    Closes-Bug: #1376013

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/juno
Review: https://review.openstack.org/153667

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/153667
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=496d7a8a4b68be799385c48c29830e3733ec1d4d
Submitter: Jenkins
Branch: stable/juno

commit 496d7a8a4b68be799385c48c29830e3733ec1d4d
Author: Sylvain Afchain <email address hidden>
Date: Thu Nov 20 14:25:58 2014 +0000

    Fix floating-ips in error state in dvr mode

    Before this fix an exception was raised when
    creating the veth between the fip namespace and
    the qrouter namespace when the veth was already
    present.
    This fix add a check to only create the veth if
    not present.

    Conflicts:
        neutron/tests/unit/test_l3_agent.py

    (cherry-picked from c15923230da2a21d5fdb56c885baa7f3aa045090)
    Change-Id: Iefea9778223aac885bedfdacfdeacfce74776333
    Closes-Bug: #1376013