Provide additional metadata

[atyronesmith]

RFE -- Provide additional metadata for CNI plugins

For virtual deployments where the underlying infrastructure is providing networking resources, it is desirable to convey infrastructure network information to pods. For example, if the underlying infrastructure networks have UUIDs and/or names, that information could be supplied to the pods for additional verification and resource discovery. In addition, some infrastructures (OpenStack) provide the ability to tag individual virtual interfaces with general text that can be used inside the pod.

Perhaps a top-level tag metadata that allows including additional infrastructure specific metadata...

{
   "type":"pci",
   "version":"1.0.0",
   "pci":{
      "pci-address":"0000:01:02.2",
      "pf-pci-address":"0000:01:02.0"
   },
   "metadata":{
      "infra":"OpenStack",
      "metadata":{
         "networkID":"<UUID>",
         "networkTags":[
            "tag1",
            "tag2"
         ]
      }
   }
}```