*** This bug is a duplicate of bug 1489372 ***
https://bugs.launchpad.net/bugs/1489372
@Arthur, you are correct. I've used 'git bisect' and found out that [1]
already fixes this issue. I will close this bug as a duplicate.
[1]: https://review.openstack.org/#/c/218118/
** Changed in: neutron
Status: New => Fix Released
** This bug has been marked a duplicate of bug 1489372
OVS agent restart breaks connectivity when l2pop is turned on
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https://bugs.launchpad.net/bugs/1493788
Title:
DVR: Restarting the OVS agent does not re-create some of br-tun's
flows
Status in neutron:
Fix Released
Bug description:
When, on a setup that has a DVR router, an OVS agent restarts, it
fails to re-create some of the flows for br-tun. For example:
$ # flows before agent restart
$ sudo ovs-ofctl dump-flows br-tun
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=77.325s, table=0, n_packets=0, n_bytes=0, idle_age=77,
priority=0 actions=drop
cookie=0xa30fd64e48832cbc, duration=77.292s, table=0, n_packets=0,
n_bytes=0, idle_age=190, priority=1,in_port=1 actions=resubmit(,1)
cookie=0xa30fd64e48832cbc, duration=77.281s, table=1, n_packets=0,
n_bytes=0, idle_age=190, priority=0 actions=resubmit(,2)
cookie=0x0, duration=77.324s, table=2, n_packets=0, n_bytes=0, idle_age=77,
priority=0,dl_dst=00:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,20)
cookie=0x0, duration=77.324s, table=2, n_packets=0, n_bytes=0, idle_age=77,
priority=0,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,22)
cookie=0x0, duration=77.324s, table=3, n_packets=0, n_bytes=0, idle_age=77,
priority=0 actions=drop
cookie=0x0, duration=77.324s, table=4, n_packets=0, n_bytes=0, idle_age=77,
priority=0 actions=drop
cookie=0xa30fd64e48832cbc, duration=77.018s, table=4, n_packets=0,
n_bytes=0, idle_age=193, priority=1,tun_id=0x437
actions=mod_vlan_vid:1,resubmit(,9)
cookie=0x0, duration=77.323s, table=6, n_packets=0, n_bytes=0, idle_age=77,
priority=0 actions=drop
cookie=0xa30fd64e48832cbc, duration=77.286s, table=9, n_packets=0,
n_bytes=0, idle_age=190, priority=0 actions=resubmit(,10)
cookie=0xa30fd64e48832cbc, duration=77.259s, table=9, n_packets=0,
n_bytes=0, idle_age=65534, priority=1,dl_src=fa:16:3f:55:8c:22 actions=output:1
cookie=0x0, duration=77.323s, table=10, n_packets=0, n_bytes=0, idle_age=77,
priority=1
actions=learn(table=20,hard_timeout=300,priority=1,cookie=0xa30fd64e48832cbc,NXM_OF_VLAN_TCI[0..11],NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],load:0->NXM_OF_VLAN_TCI[],load:NXM_NX_TUN_ID[]->NXM_NX_TUN_ID[],output:NXM_OF_IN_PORT[]),output:1
cookie=0x0, duration=77.323s, table=20, n_packets=0, n_bytes=0, idle_age=77,
priority=0 actions=resubmit(,22)
cookie=0xa30fd64e48832cbc, duration=77.317s, table=22, n_packets=0,
n_bytes=0, idle_age=193, priority=0 actions=drop
$ # flows after agent restart
$ sudo ovs-ofctl dump-flows br-tun
NXST_FLOW reply (xid=0x4):
cookie=0xbcfcd1c3b35d83e3, duration=3.072s, table=0, n_packets=0, n_bytes=0,
idle_age=223, priority=1,in_port=1 actions=resubmit(,1)
cookie=0xbcfcd1c3b35d83e3, duration=3.060s, table=1, n_packets=0, n_bytes=0,
idle_age=223, priority=0 actions=resubmit(,2)
cookie=0xbcfcd1c3b35d83e3, duration=2.997s, table=4, n_packets=0, n_bytes=0,
idle_age=226, priority=1,tun_id=0x437 actions=mod_vlan_vid:1,resubmit(,9)
cookie=0xbcfcd1c3b35d83e3, duration=3.067s, table=9, n_packets=0, n_bytes=0,
idle_age=223, priority=0 actions=resubmit(,10)
cookie=0xbcfcd1c3b35d83e3, duration=3.038s, table=9, n_packets=0, n_bytes=0,
idle_age=65534, priority=1,dl_src=fa:16:3f:55:8c:22 actions=output:1
cookie=0xbcfcd1c3b35d83e3, duration=3.100s, table=22, n_packets=0,
n_bytes=0, idle_age=226, priority=0 actions=drop
It is clear that quite a few flows are missing. They can be re-created
by deleting all the flows on br-int - this starts a chain reaction
which ultimately recreates all the flows, including br-tun's.
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