website/content/en/docs/reference/setup-tools/kubeadm/kubeadm-config.md

reviewers	title	content_template	weight
mikedanese luxas jbeda	kubeadm config	templates/concept	50

{{% capture overview %}} Beginning with v1.8.0, kubeadm uploads the configuration of your cluster to a ConfigMap called kubeadm-config in the kube-system namespace, and later reads the ConfigMap when upgrading. This enables correct configuration of system components, and provides a seamless user experience.

You can execute kubeadm config view to view the ConfigMap. If you initialized your cluster using kubeadm v1.7.x or lower, you must use kubeadm config upload to create the ConfigMap before you may use kubeadm upgrade.

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kubeadm config upload from-file

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kubeadm config upload from-flags

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kubeadm config view

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• kubeadm upgrade to upgrade a Kubernetes cluster to a newer version {{% /capture %}}