Rodolfo Alonso Hernandez 526f238fa4 [OVN] QoS max and min rules should be defined in LSP for phynet ports ...

The ML2/OVN QoS enforcement for physical network ports (flat, VLAN) is
done in the localnet port of the physical bridge via TC commands.

A physical network will have a physical bridge in each compute node.
This physical bridge will have a NIC interface that will provide
connectivity. On this interface (localnet port), OVN enforces the QoS
mininum and maximum rate rules (**only egress**), using TC commands
on the interface. It creates a HTB qdisc and a class per port with
QoS rules. Each class, that will match the traffic of the port, will
have a "ceil" and "rate" values [1].

OVN uses the information stored in the "Logical_Switch_Port.options"
field, stored as a dictionary, with the keys [2]:
* qos_min_rate
* qos_max_rate
* qos_burst

This patch is:
* Moving the max and min rate configuration from the QoS registers
  to the "Logical_Switch_Port.options" dictionary.
* Logging a warning when a min rate option is defined in a port hosted
  in a tunnelled network (not supported).

This change was documented in [3], in OVN version 23.06.0

[1]https://man7.org/linux/man-pages/man8/tc-htb.8.html
[2]1bec9e3ddd/ovn-nb.xml (L1155-L1168)
[3]87514ac042

Closes-Bug: #2015376
Change-Id: I4581d31ba04c0d2f3f45ee6d07bcaba82fb038d4

2024-12-23 14:48:36 +00:00

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