How DestinationRule subsets support set-based label selector

[masquee]

Describe the feature request

I have two group of pods which have groupId label, and I want do locality load balance around them (which means they must in a same subset). But I found that labels of subset cannot do the logic of or.

Kubernetes supports set-based label selector, such as

selector:
  matchExpressions:
    - {key: groupId, operator: In, values: [123, 456]}

Can subset support this? Or any other alternatives?

Describe alternatives you've considered

Affected product area (please put an X in all that apply)

[ ] Docs
[ ] Installation
[X] Networking
[ ] Performance and Scalability
[ ] Extensions and Telemetry
[ ] Security
[ ] Test and Release
[ ] User Experience
[ ] Developer Infrastructure

Affected features (please put an X in all that apply)

[ ] Multi Cluster
[ ] Virtual Machine
[ ] Multi Control Plane

Additional context

[howardjohn]

It is not currently supported. You would need to make a common label between all of them and select on that.

[masquee]

It is not currently supported. You would need to make a common label between all of them and select on that.

@howardjohn Any plan to support this feature?

Make a common label is work, but pod's label will deep coupling with routing config.

I took a rough look at the source code, and it seems that it is not difficult to support this feature. The parameters received by the underlying implementations are a list of labels.

[istio-policy-bot]

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