traffic lost during vrouter-agent restart
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| OpenContrail |
New
|
Wishlist
|
Prabhjot Singh Sethi | ||
Bug Description
Release : On a 1.06
Component : vrouter-agent
when I restart vrouter-agent on a compute node traffic is lost in both ways during a few seconds like 5 for a plateform with 1 VM to 10 for a plateform with 15-20 VMs
From the outside :
^^:~$ ping 84.39.63.170
PING 84.39.63.170 (84.39.63.170): 56 data bytes
64 bytes from 84.39.63.170: icmp_seq=0 ttl=57 time=2.834 ms
64 bytes from 84.39.63.170: icmp_seq=1 ttl=57 time=1.557 ms
64 bytes from 84.39.63.170: icmp_seq=2 ttl=57 time=1.604 ms
64 bytes from 84.39.63.170: icmp_seq=3 ttl=57 time=1.666 ms
Request timeout for icmp_seq 4
Request timeout for icmp_seq 5
Request timeout for icmp_seq 6
Request timeout for icmp_seq 7
64 bytes from 84.39.63.170: icmp_seq=8 ttl=57 time=154.615 ms
64 bytes from 84.39.63.170: icmp_seq=9 ttl=57 time=1.584 ms
64 bytes from 84.39.63.170: icmp_seq=10 ttl=57 time=1.600 ms
64 bytes from 84.39.63.170: icmp_seq=11 ttl=57 time=4.501 ms
^C
--- 84.39.63.170 ping statistics ---
12 packets transmitted, 8 packets received, 33.3% packet loss
round-trip min/avg/max/stddev = 1.557/21.
From the inside :
cloud@vrouter-
PING www.opencontrai
[...]
64 bytes from 192.237.193.210 (192.237.193.210): icmp_seq=14 ttl=53 time=123 ms
64 bytes from 192.237.193.210 (192.237.193.210): icmp_seq=19 ttl=53 time=123 ms
64 bytes from 192.237.193.210 (192.237.193.210): icmp_seq=20 ttl=53 time=132 ms
64 bytes from 192.237.193.210 (192.237.193.210): icmp_seq=21 ttl=53 time=123 ms
--- www.opencontrai
21 packets transmitted, 17 received, 19% packet loss, time 20036ms
rtt min/avg/max/mdev = 123.042/
| tags: | added: vnswad |
| Changed in opencontrail: | |
| assignee: | nobody → Prabhjot Singh Sethi (prabhjot) |
| tags: |
added: vrouter removed: vnswad |
| Prabhjot Singh Sethi (prabhjot) wrote | #1 |
| Changed in opencontrail: | |
| importance: | Undecided → Wishlist |
As per current contrail-
because of this on vrouter-agent restart, vrouter will not have forwarding information for a short while and will result in drops/traffic loss.
To Achieve graceful restart of vrouter agent we need to have a mechanism to read back forwarding plane information from vrouter and then should be able to audit and cleanup the stale information.