[Doc] L3 router gateway IP rate limit
Adds L3 router gateway IP QoS config guide for users. Partially-Implements blueprint: router-gateway-ip-qos Closes-Bug: #1757044 Change-Id: Ie5abc1bad47caba8d1fef42c2e5c7c8df6cc9c2b
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@ -163,6 +163,28 @@ On the network and compute nodes:
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[agent]
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extensions = fip_qos
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#. Optionally, in order to enable QoS for router gateway IPs, set the
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``extensions`` option in the ``[agent]`` section of
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``/etc/neutron/l3_agent.ini`` to include ``gateway_ip_qos``. Set this
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to all the ``dvr_snat`` or ``legacy`` L3 agents. For example:
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.. code-block:: ini
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[agent]
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extensions = gateway_ip_qos
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And ``gateway_ip_qos`` should work together with the ``fip_qos`` in L3
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agent for centralized routers, then all L3 IPs with binding QoS policy
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can be limited under the QoS bandwidth limit rules:
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.. code-block:: ini
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[agent]
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extensions = fip_qos, gateway_ip_qos
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#. As rate limit doesn't work on Open vSwitch's ``internal`` ports,
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optionally, as a workaround, to make QoS bandwidth limit work on
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router's gateway ports, set ``ovs_use_veth`` to ``True`` in ``DEFAULT``
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