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This article introduces the knowledge of "how Rancher manages the state of K8S components". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Recently installed K8s, component controller-manager and scheduler status Unhealthy through kubeadm

The import to Rancher2.4.5 is shown as follows:

Check the cluster status by installing kubernetes v1.18.6 through kubeadm, and find the component controller-manager and scheduler status Unhealthy

Check that the port is not listening

The pod component is running normally

Check that non-secure ports are disabled in the kube-scheduler and kube-controller-manager component configuration

Vim / etc/kubernetes/manifests/kube-scheduler.yaml

Vim / etc/kubernetes/manifests/kube-controller-manager.yaml

Kube-scheduler.yaml

Kube-controller-manager.yaml

Remove the port=0 (comments are added to the screenshot)

And then systemctl restart kubelet

Check again that the status of the cluster components is normal.

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