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NeutronWSGI之network_availability_zone.md

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Neutron WSGI 之 network_availability_zone

  • 测试方法：
curl -s -X GET http://172.16.100.106:9696//v2.0/networks -H 'Content-Type: application/json' -H 'X-Auth-Token: deffcb298bfc499f8524625b98af7b97' | jq
  • extension：neutron/extensions/network_availability_zone.py

这个 extension 是为 networks 增加两个属性： availability_zone_hints 和 availability_zones。

  • WSGI 的实现：neutron/db/agentschedulers_db.py 中的 class AZDhcpAgentSchedulerDbMixin

class AZDhcpAgentSchedulerDbMixin

class AZDhcpAgentSchedulerDbMixin(DhcpAgentSchedulerDbMixin,
                                  network_az.NetworkAvailabilityZoneMixin):
    """Mixin class to add availability_zone supported DHCP agent scheduler."""

    def get_network_availability_zones(self, network):
        zones = {agent.availability_zone for agent in network.dhcp_agents}                                                                                             
        return list(zones)

NetworkAvailabilityZoneMixin

class NetworkAvailabilityZoneMixin(net_az.NetworkAvailabilityZonePluginBase):
    """Mixin class to enable network's availability zone attributes."""
 
    def _extend_availability_zone(self, net_res, net_db):
        net_res[az_ext.AZ_HINTS] = az_ext.convert_az_string_to_list(
            net_db[az_ext.AZ_HINTS])
        net_res[az_ext.AVAILABILITY_ZONES] = ( 
            self.get_network_availability_zones(net_db))
 
    common_db_mixin.CommonDbMixin.register_dict_extend_funcs(
        attributes.NETWORKS, ['_extend_availability_zone'])

看到这个 common_db_mixin.CommonDbMixin.register_dict_extend_funcs 是不是就比较熟悉了？

我写过一篇 Neutron DB 中的公共方法，里面有这个的介绍。

在构造 networks 资源的请求响应时，会调用这个注册的方法，来进行响应的构造。