[RFE] QoS driver for LinuxBridge Agent

[Slawek Kaplonski]

Currently QoS is supported by openvswitch agent (QosOVSAgentDriver) and by sr-iov agent (QosSRIOVAgentDriver) on compute hosts.
There should be also similar agent for support LinuxBridge agent. It can set bw limitations using "tc" which can be applied for ingress and egress traffic on different ports (interfaces) in linux bridge.

[vikram.choudhary (vikschw)]

This is in the continuation of QoS support developed as part of Liberty.

Specification:
    https://blueprints.launchpad.net/neutron/+spec/ml2-lb-ratelimit-support

Parent Specification:
    https://blueprints.launchpad.net/neutron/+spec/quantum-qos-api-db

Other driver support:

SRIOV:
    https://blueprints.launchpad.net/neutron/+spec/ml2-sriov-qos-with-bwlimiting

OVS:
    https://blueprints.launchpad.net/neutron/+spec/ml2-qos-ovs-bwlimiting

[Miguel Angel Ajo (mangelajo)]

Correct, you don't need to create a new agent, just integrate the agent extensions in the linuxbridge agent :)

[Hirofumi Ichihara (ichihara-hirofumi)]

There is nobody assigned to this bug. Can I get this if nobody will propose this feature?

[Slawek Kaplonski (slaweq)]

@Hirofumi Ichihara (ichihara-hirofumi): we are already working on it with Vikram

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/236210

[Armando Migliaccio (armando-migliaccio)]

I see no reason why linuxbridge would be second class compared to OVS, as matter of fact it isn't so I am happy to see this happening. That said, please identify a person who can help you in the review process. Is that going to be Ihar?

[Slawek Kaplonski (slaweq)]

Yes, Ihar is one of reviewers assigned to this patch. I'm now waiting for review and suggestions to my code :)

[Miguel Angel Ajo (mangelajo)]

slaweq, I will be reviewing too. Cheers, and happy to see this happening.

[Armando Migliaccio (armando-migliaccio)]

No updates for a while:

http://eavesdrop.openstack.org/meetings/neutron_drivers/2016/neutron_drivers.2016-02-04-22.01.log.html#l-110

[Miguel Angel Ajo (mangelajo)]

related to http://lists.openstack.org/pipermail/openstack-dev/2016-February/087360.html , shall we slam this to a simple bug?, This is not an RFE imo.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/236210
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=45410d76bea6a37b750b1b197f1b04edaf32c5aa
Submitter: Jenkins
Branch: master

commit 45410d76bea6a37b750b1b197f1b04edaf32c5aa
Author: Sławek Kapłoński <email address hidden>
Date: Sat Oct 17 12:54:32 2015 +0200

    Add support for QoS for LinuxBridge agent

    There is a new QoS extension driver for the linuxbridge agent
    being added. This driver provides support for QoS configuring
    on the linuxbridge agent.
    This patch introduces two new config options for Linuxbridge agent:
    kernel_hz - HZ value of host kernel,
    tbf_latency - value of latency in tbf qdisc to calculate size of queue.

    Co-Authored-By: vikram.choudhary <email address hidden>

    Change-Id: I457ca2569b5d4a916ba09e71040505cd0ad3257b
    Closes-Bug: #1500012
    Closes-Bug: #1550514
    DocImpact Update agent configuration to show settings related to
              QoS and bandwidth limiting

[Thierry Carrez (ttx)]

This issue was fixed in the openstack/neutron 8.0.0.0b3 development milestone.