---
reviewers:
- luxas
- jbeda
title: kubeadm config
content_template: templates/concept
weight: 50
---
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During `kubeadm init`, kubeadm uploads the `ClusterConfiguration` object to your cluster
in a ConfigMap called `kubeadm-config` in the `kube-system` namespace. This configuration is then read during
`kubeadm join`, `kubeadm reset` and `kubeadm upgrade`. To view this ConfigMap call `kubeadm config view`.

You can use `kubeadm config print` to print the default configuration and `kubeadm config migrate` to
convert your old configuration files to a newer version. `kubeadm config images list` and
`kubeadm config images pull` can be used to list and pull the images that kubeadm requires.

In Kubernetes v1.13.0 and later to list/pull kube-dns images instead of the CoreDNS image
the `--config` method described [here](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase/#cmd-phase-addon)
has to be used.

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## kubeadm config view {#cmd-config-view}
{{< include "generated/kubeadm_config_view.md" >}}

## kubeadm config print init-defaults {#cmd-config-print-init-defaults}
{{< include "generated/kubeadm_config_print_init-defaults.md" >}}

## kubeadm config print join-defaults {#cmd-config-print-join-defaults}
{{< include "generated/kubeadm_config_print_join-defaults.md" >}}

## kubeadm config migrate {#cmd-config-migrate}
{{< include "generated/kubeadm_config_migrate.md" >}}

## kubeadm config images list {#cmd-config-images-list}
{{< include "generated/kubeadm_config_images_list.md" >}}

## kubeadm config images pull {#cmd-config-images-pull}
{{< include "generated/kubeadm_config_images_pull.md" >}}

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* [kubeadm upgrade](/docs/reference/setup-tools/kubeadm/kubeadm-upgrade/) to upgrade a Kubernetes cluster to a newer version
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