Kubernetes has the rhythm of 3~4 releases each year, and users are suffering to keep upgrading their increasing clusters and larger clusters. Besides this, how to manage the CA in a cluster and upgrade the cluster config on-the-fly is also what the end-user is looking for.

In this session, we will bring some updates from wg-lts (long term support), particularly, the strategies like how long will the kubernetes community support a version officially and what is the scope of the LTS version, we will take a close look at klts [1] as well.

We will compare a couple of available solutions for how to manage Kubernetes cluster effectively, cluster-api, kops etc.

Also, we will take a glance over an on-going in-house project kubeadm-operator for how to upgrade k8s cluster with declarative language, and the support of the certificate renewal, certificate authority rotation, update the cluster config across different nodes in your cluster！

[1] https://github.com/klts-io/kubernetes-lts