Neutron QoS service plugin

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Finally, I’ve been able to record a video showing how the QoS service plugin works.If you want to deploy this follow the instructions under the video. (open in vimeo for better quality:

Deployment instructions

Add to your devstack/local.conf

enable_plugin neutron git://
enable_service q-qos

Let stack!


now create rules to allow traffic to the VM port 22 & ICMP

source ~/devstack/accrc/demo/demo

neutron security-group-rule-create  --direction ingress \
                                --port-range-min 22 \
                                --port-range-max 22 \

neutron security-group-rule-create --protocol icmp \
                                   --direction ingress \

nova net-list
nova boot --image cirros-0.3.4-x86_64-uec --flavor m1.tiny \
          --nic net-id=*your-net-id* qos-cirros

nova show qos-cirros  # look for the IP
neutron port-list # look for the IP and find your *port id*

In another console, run the packet pusher

ssh cirros@$THE_IP_ADDRESS \
     'dd if=/dev/zero  bs=1M count=1000000000'

In yet another console, look for the port and monitor it

# given a port id 49d4a680-4236-4d0c-9feb-8b4990ac35b9
# look for the ovs port:
$ sudo ovs-vsctl show | grep qvo49d4a680-42
       Port "qvo49d4a680-42"
           Interface "qvo49d4a680-42"

finally, try the QoS rules

source ~/devstack/accrc/admin/admin

neutron qos-policy-create bw-limiter
neutron qos-bandwidth-limit-rule-create *rule-id* bw-limiter \
                        --max-kbps 3000 --max-burst-kbps 300

# after next command, the port will quickly go down to 3Mbps
neutron port-update *your-port-id* --qos-policy bw-limiter

You can change rules in runtime, and ports will be updated

neutron qos-bandwidth-limit-rule-update *rule-id* bw-limiter \
                        --max-kbps 5000 --max-burst-kbps 500

Or you can remove the policy from the port, and traffic will spike up fast to the original maximum.

neutron port-update *your-port-id* --no-qos-policy

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Published on January 11, 2018