k8s upgrade strategy

Question

k8s upgrade strategy

Closed this issue 4 years ago · 6 comments

Thanks for sharing such great project solves many Agones pain points.
We have a question is, how the behavior when we perform k8s upgrade,
It is possible to build a HA architecture, so we could achieve zero downtime during k8s upgrade.

Answer 1 · 2021-06-04T06:38:27.000Z

@axot Thank you for your attention. Does K8s upgrade here refer to K8s pod updating, or K8s components, such as kube-apiserver upgrade?

Answer 2 · 2021-06-04T08:08:29.000Z

Hi, it include both control plane(Master/apiserver) and data plane(Node/Pod) upgrade we have to concern about.

Answer 3 · 2021-06-04T15:17:04.000Z

With High-Availability Masters, we can upgrade the any K8s components online. Of course, the master node MUST be upgraded one by one.
For game application, a Squad consist of multiple DS replicas, we can rolling updating the replicas based on the Application Interactive Update feature, and don't need to stop serving for game players.

Answer 4 · 2021-06-07T05:13:49.000Z

Hi, how about carrier controller? I think it will failover to the new leader in upgrade. So may has few seconds delayed response for such scale game server?

Answer 5 · 2021-06-07T09:41:11.000Z

Yeah, current the master lease is 15 seconds, which may cause a few seconds scaling delay when carrier upgrade.

Answer 6 · 2024-05-11T03:52:32.000Z

@axot Would you like to try kruise-game (https://github.com/openkruise/kruise-game)