"RTNETLINK answers: No buffer space available" error seen using MTU advertisement feature with VxLAN overlay

Bug #1475015 reported by Deepika
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
neutron
Fix Released
Undecided
Sridhar Gaddam

Bug Description

When running the Network basic tempest test in a multi node testbed with MTU feature enabled and Vxlan overlay failed with the following error :

[00mStderr: RTNETLINK answers: No buffer space available
ESC[01;31m2015-07-14 19:35:07.838 TRACE neutron.agent.l3.router_info ESC[01;35mESC[00m
ESC[01;31m2015-07-14 19:35:07.838 TRACE neutron.agent.l3.router_info ESC[01;35mESC[00m
2015-07-14 19:35:07.842 ESC[01;31mERROR neutron.agent.l3.agent [ESC[00;36m-ESC[01;31m] ESC[01;35mESC[01;31mFailed to process compatible router 'd280eae2-52ec-4fe6-9af4-46008509bc5a'ESC[00m

Testbed :

- master (7/15/15)
- multinode - node1 - controller ; node2 - compute
- MTU feature enabled
- Vxlan overlay

The Controller local.con details are :

localadmin@devstack-server00:~/devstack$ more local.conf
[[local|localrc]]
ADMIN_PASSWORD=Cisco123
SERVICE_TOKEN=$ADMIN_PASSWORD
DATABASE_PASSWORD=$ADMIN_PASSWORD
RABBIT_PASSWORD=$ADMIN_PASSWORD
SERVICE_PASSWORD=$ADMIN_PASSWORD
MYSQL_PASSWORD=$ADMIN_PASSWORD
SERVICE_TOKEN=1112f596-76f3-11e3-b3b2-e716f9080d50
NOVA_USE_QUANTUM_API=v3
LOGFILE=$DEST/stack.sh.log
VERBOSE=True
DEBUG=True
USE_SCREEN=True
SCREEN_LOGDIR=$DEST/logs
API_RATE_LIMIT=False
FIXED_RANGE_V6=2001:dead:beef:deed::/64
IPV6_PRIVATE_NETWORK_GATEWAY=2001:dead:beef:deed::1
IMAGE_URLS='http://172.29.173.233/cirros-0.3.3-x86_64-uec.tar.gz,http://172.29.173.233/trusty-server-cloudimg-amd64-disk1.img'
CIRROS_VERSION=0.3.3
SWIFT_REPLICAS=1
SWIFT_HASH=011688b44136573e209e
MULTI_HOST=True
HOST_IP=192.168.10.2
enable_service g-api g-reg key n-api n-crt n-obj n-cpu n-cond cinder c-sch
enable_service c-api c-vol n-sch n-novnc n-xvnc n-cauth horizon rabbit
enable_service mysql q-svc q-agt q-l3 q-dhcp q-meta q-lbaas q-vpn q-fwaas q-metering neutron
disable_service n-net
enable_service s-proxy s-object s-container s-account
enable_service tempest
TEMPEST_REPO=https://github.com/CiscoSystems/tempest.git
TEMPEST_BRANCH=ipv6
#enable_service tempest
TEMPEST_REPO=https://github.com/cisco-openstack/tempest.git
TEMPEST_BRANCH=proposed
[[post-config|/etc/neutron/neutron.conf]]
[DEFAULT]
advertise_mtu = True
network_device_mtu = 1200
[[post-config|/etc/nova/nova.conf]]
[DEFAULT]
network_device_mtu = 1200
[[post-config|/etc/neutron/plugins/ml2/ml2_conf.ini]]
[ml2]
segment_mtu = 1200
path_mtu = 1200

Revision history for this message
Sridhar Gaddam (sridhargaddam) wrote :

@Deepika, "RTNETLINK answers: No buffer space available" could be an error code for some command.
Can you please share the full l3-agent logs (or at-least an expanded logs for this error code)

Revision history for this message
Deepika (deepika-j) wrote :
Revision history for this message
Sridhar Gaddam (sridhargaddam) wrote :

Thanks @Deepika for the logs. I'm looking into this issue.

Changed in neutron:
assignee: nobody → Sridhar Gaddam (sridhargaddam)
Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix proposed to neutron (master)

Fix proposed to branch: master
Review: https://review.openstack.org/208435

Changed in neutron:
status: New → In Progress
Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix merged to neutron (master)

Reviewed: https://review.openstack.org/208435
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=9750ab79c67f0f5b24cbbb9b7f2c499d4b911283
Submitter: Jenkins
Branch: master

commit 9750ab79c67f0f5b24cbbb9b7f2c499d4b911283
Author: sridhargaddam <email address hidden>
Date: Mon Aug 3 11:16:37 2015 +0000

    IPv6 display suitable message when MTU is invalid on iface

    IPv6 protocol requires a minimum MTU of 1280 bytes on the interface
    to configure an IPv6 address to the interface. This patch logs an
    appropriate error message and exits the agent if ipv6 is enabled and
    network_device_mtu is less than the minimum value.

    DocImpact

    Closes-Bug: #1475015
    Change-Id: I13666de4e6f5f6775ad26342e513c3c17a003b8e

Changed in neutron:
status: In Progress → Fix Committed
Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix proposed to neutron (feature/pecan)

Fix proposed to branch: feature/pecan
Review: https://review.openstack.org/218710

Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix merged to neutron (feature/pecan)
Download full text (155.6 KiB)

Reviewed: https://review.openstack.org/218710
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=2c5f44e1b3bd4ed8a0b7232fd293b576cc8c1c87
Submitter: Jenkins
Branch: feature/pecan

commit f35d1c5c50dccbef1a2e079f967b82f0df0e22e9
Author: Adelina Tuvenie <email address hidden>
Date: Thu Aug 27 02:27:28 2015 -0700

    Fixes wrong neutron Hyper-V Agent name in constants

    Change Id03fb147e11541be309c1cd22ce27e70fadc28b5 moved the
    AGENT_TYPE_HYPERV constant from common.constants to
    plugins.ml2.drivers.hyperv.constants but change the value of the
    constant from 'HyperV agent' to 'hyperv'. This patch changes
    the name back to 'HyperV agent'

    Change-Id: If74b4b2a84811e266c8b12e70bf6bfe74ed4ea21
    Partial-Bug: #1487598

commit de604de334854e2eb6b4312ff57920564cbd4459
Author: OpenStack Proposal Bot <email address hidden>
Date: Sun Aug 30 01:39:06 2015 +0000

    Updated from global requirements

    Change-Id: Ie52aa3b59784722806726e4046bd07f4a4d97328

commit f0415ac20eaf5ab4abb9bd4839bf6d04ceee85d0
Author: armando-migliaccio <email address hidden>
Date: Fri Aug 28 13:53:04 2015 -0700

    Revert "Add support for unaddressed port"

    This implementation may expose a vulnerability where a malicious
    user can sieze the opportunity of a time window where a port
    may land unaddressed on a shared network, thus allowing him/her
    to suck up all the tenant traffic he/she wants....oh the shivers.

    This reverts commit d4c52b7f5a36a103a92bf9dcda7f371959112292.

    Change-Id: I7ebdaa8d3defa80eab90e460fde541a5bdd8864c

commit 013fdcd2a6d45dbe4de5d6e7077e5e9b60985ef9
Author: Assaf Muller <email address hidden>
Date: Fri Aug 28 16:41:07 2015 -0400

    Improve logging upon failure in iptables functional tests

    This will help us nail down a more accurate and efficient logstash
    query.

    Change-Id: Iee4238e358f7b056e373c7be8d6aa3202117a680
    Related-Bug: #1478847

commit 622dea818d851224a43d5276a81d5ce8a6eebb76
Author: Ivar Lazzaro <email address hidden>
Date: Mon Aug 17 17:17:42 2015 -0700

    handle gw_info outside of the db transaction on router creation

    Move the gateway interface creation outside the DB transaction
    to avoid lock timeout.

    Change-Id: I5a78d7f32e8ca912016978105221d5f34618af19
    Closes-bug: 1485809

commit 5b27d290a0a95f6247fc5a0fe6da1e7d905e6b2d
Author: Assaf Muller <email address hidden>
Date: Wed Aug 26 10:07:03 2015 -0400

    Remove ml2 resource extension success logging

    This is the cause of a tremendous amount of logs, for no
    perceivable gain. A normal dvr run in the gate shows this debug
    message around 120K times, which is way too much.

    Closes-Bug: #1489952

    Change-Id: I26fca8515d866a7cc1638d07fa33bc04479ae221

commit 8d3faf549cba2f58c872ef4121b2481e73464010
Author: huangpengtao <email address hidden>
Date: Fri Aug 28 23:20:46 2015 +0800

    Replace "prt" variable by "port"

    the local variable prt is meaningless,
    and port is used popular.

    Change-Id: I20849102cf5b4d84433c46791b4b1e2a22dc4739

commit ee374e7a5f4dea538fcd942f5...

tags: added: in-feature-pecan
Thierry Carrez (ttx)
Changed in neutron:
milestone: none → liberty-3
status: Fix Committed → Fix Released
Thierry Carrez (ttx)
Changed in neutron:
milestone: liberty-3 → 7.0.0
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