ovn trace

ovn南向db leader中支持出方向和入方向trace。

# 查看南向逻辑流表
ovn-sbctl lflow-list

# 查看port
ovn-nbctl show

# 追踪包
ovn-trace --detailed ovn-default 'inport == "coredns-5d78c9869d-75wj8.kube-system" && ip4.src == 10.16.0.2 && ip4.dst == 10.16.0.3 && eth.src == 00:00:00:C5:F3:79 && eth.dst == 00:00:00:FF:27:A6'