Calico: Integration with Kubernetes Native Dual-Stack

Created on 8 Jul 2019 · 5Comments · Source: projectcalico/calico

Dual-stack support in kubernetes is underway (KEP). Phase-1 alpha recently merged into master and phase-2 is under active development.

Calico currently supports dual-stack independent of kubernetes; however, tighter integration with kubernetes dual-stack would be highly desirable.

Also, current dual-stack development efforts rely on simpler CNI plugins -- kubenet/bridge/host-local. Having early dual-stack support within calico would aid in testing dual-stack on: (i) more realistic/diverse deployments and (ii) e2e testing tools like KinD that use calico as their network plugin.

kinenhancement

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Arvinderpal

All 5 comments

Are you seeing specific problems with Calico in these environments? Does it not "just work"?

The only problem we're aware of is that the instructions for enabling IPv6 in Calico are a bit intimidating for a beginner. https://docs.projectcalico.org/v3.8/networking/ipv6

lwr20 on 8 Jul 2019

👍1

Are you seeing specific problems with Calico in these environments? Does it not "just work"?

The dual-stack work includes core API changes (e.g. PodSubnet in the Node object is now a slice), I assume these changes will require appropriate changes on the calico end. I'm not familiar with the calico code base, so I may just be wrong here.

I did manage to bring up a dual-stack cluster using a calico specific approach as documented here, but this is of course independent of the recent dual-stack changes in k8s. As more of the dual-stack PRs hit k8s master, I will attempt to integrate with calico. I'll add updates here.

Arvinderpal on 14 Jul 2019

👍1

Thanks for reporting this. We're looking at dual stack and IPv6, if there's information you'd like to contribute or PRs you'd like to propose we'd be very thankful.

rafaelvanoni on 15 Jul 2019

I did manage to bring up a dual-stack cluster using a calico specific approach as documented here, but this is of course independent of the recent dual-stack changes in k8s. As more of the dual-stack PRs hit k8s master, I will attempt to integrate with calico. I'll add updates here.

Awesome, appreciate this. Someone on the Calico side should also try to review the new dual-stack KEP and add comments here with any work we identify. I think/hope it should be minimal.

caseydavenport on 16 Jul 2019

@Arvinderpal I'm happy to say that the Calico integration with dual stack was done for our v3.11 release, as mentioned at https://docs.projectcalico.org/v3.11/release-notes/.

I think that means we can close this issue; please do open new issues if you notice anything missing.