Question on Official Kubernetes v1.35 support for Calico

[wangzining]

Hi Calico team,

In our project, we are planning Kubernetes upgrades and would like to understand the official support status for Kubernetes v1.35.

From the system requirements pages:

Calico v3.29 is tested against Kubernetes v1.29–v1.32
Calico v3.31 is tested against Kubernetes v1.32–v1.34
For Kubernetes v1.35 specifically:

Which Calico minor/patch version is planned to be officially tested and supported with Kubernetes v1.35?
Is there a rough timeline for when that support will be documented on the system requirements page?
In the meantime, is Calico v3.31.x expected to work with Kubernetes v1.35 (even if not yet in the “tested” matrix), or should we wait for a newer Calico release before upgrading clusters to v1.35?

Our current environment:
Kubernetes: v1.34, planning on v1.35
Calico: v3.29.5 (planning to upgrade to v3.31.3 first)
Any guidance or recommendations for production deployments on Kubernetes v1.35 would be greatly appreciated.

Thanks!

[caseydavenport]

I'm not aware of any issues with k8s v1.35 and Calico v3.30 / v3.31 - I believe we are already testing Calico v3.31 on k8s v1.35 without any issues, but @lwr20 will know best.

[lwr20]

Our overnight e2es "float" the kubernetes version, as you can see in the e2e pipelines in https://github.com/projectcalico/calico/tree/release-v3.31/.semaphore/end-to-end/pipelines

We test against stable, stable-1 and stable-2. Currently k8s "stable" is 1.35, and I'm not seeing any issues with either Calico v3.30 or v3.31.

The "official" support statement is here: https://docs.tigera.io/calico/latest/getting-started/kubernetes/requirements#kubernetes-requirements, but that gets updated (with a delay) from the e2e run results - I'm sure we'll be adding 1.35 to the supported list for Calico v3.31 as soon as we get a moment.

[lwr20]

v1.35 has been added to https://docs.tigera.io/calico/latest/getting-started/kubernetes/requirements#kubernetes-requirements