Write ADR for Container Networking/CNI

[jschoone]

As a KaaS operator, I want to understand exactly what standards my CNI must fulfill by reading the relevant ADR.

Definition of Ready:

• [ ] User Story is small enough to be finished within one sprint
• [ ] User Story is clear and understood by the whole team
• [ ] Acceptance criteria are defined
• [ ] Acceptance criteria are clear and understood by the whole team

Definition of Done:

• [ ] All acceptance criteria are met
• [ ] Changes have been reviewed
• [ ] CI tests have run successfully
• [ ] Documentation has been updated
• [ ] Release Notes have been updated

[jschoone]

As discussed in Container Meeting

[guettli]

First version of PR was created yesterday: https://github.com/SovereignCloudStack/standards/pull/322

[NotTheEvilOne]

So far the following features are required / expected at the date of writing:

• Basic CNI plugin capabilities [1]
• Host based firewall (see also Network Policy)
• Gateway API [2] features HTTPRoute and TLSRoute [3]
• Network Policy [4] [5]

The relevant document may be extended after team review.

[1] https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/ [2] https://gateway-api.sigs.k8s.io/ [3] https://github.com/SovereignCloudStack/k8s-cluster-api-provider/issues/710 [4] https://github.com/SovereignCloudStack/standards/issues/769 [5] https://kubernetes.io/docs/concepts/services-networking/network-policies/#behavior-of-to-and-from-selectors

[mbuechse]

Is this a duplicate of https://github.com/SovereignCloudStack/standards/issues/769? It sure seems so to me.