[Proposal] Add a specification for UDP traffic

[SantoDE]

Describe the proposal For now, there is no specification for UDP traffic. A simple spec could look like that (similiar to the TCPRoute)

Example:

apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:  
  name: udproutes.specs.smi-spec.io
spec:  
  group: specs.smi-spec.io
  scope: Namespaced 
  names:    
    kind: UDPRoute
    shortNames: 
      - ur
    plural: udproutes
    singular: udproute
  version: v1alpha3
  versions:
    - name: v1alpha3
      served: true
      storage: true
    - name: v1alpha3
      served: false
      storage: false

Scope

• [X] New specification
• [ ] Traffic Access Control
• [X] Traffic Specs
• [ ] Traffic Metrics
• [ ] Traffic Split

Possible use cases Currently, to manage access control you can utilize HTTPRouteGroup and TCPRoute in conjunction with Traffic Targets. However, there is no way to manage access control for (raw) UDP traffic as of now. Therefore, a simple resource could already solve that case. Maesh could provide a first implementation, as it become a requirement for us.

I'm happy to discuss that e.g. at the next community meeting :)

Linked to: #108

[grampelberg]

Sounds reasonable to me!

[SantoDE]

Cool :) Im happy to contribute to the sdk and specification repo with documentation in case nobody else raises objections then :)

[grampelberg]

Get a PR up, seems small and an awesome addition.

[SantoDE]

@grampelberg done :-)

[SantoDE]

Will be revisited after #156