Neighbour table overflow problem with Neutron
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
kolla-ansible |
Fix Released
|
Medium
|
Pierre Riteau | ||
Train |
Fix Released
|
Medium
|
Radosław Piliszek | ||
Ussuri |
Fix Released
|
Medium
|
Pierre Riteau |
Bug Description
While re-deploying an existing OpenStack Queens deployment with Kolla Ansible on a cloud with a large number of networks and instances, we discovered that some default sysctl values were too low on network nodes, with connectivity from network nodes failing shortly after deploying neutron_l3_agent. Note that the network nodes were configured in dvr_snat mode; this may or may not be part of the problem.
We saw messages in the kernel log like:
net_ratelimit: 26 callbacks suppressed
And experienced ping returning:
ping: sendmsg: Invalid argument
This problem was discussed in detail by Charms and some other projects:
* https:/
* https:/
* https:/
* https:/
* https:/
Changed in kolla-ansible: | |
importance: | Undecided → Medium |
Fix proposed to branch: master /review. opendev. org/682664
Review: https:/