Improve Kubeadm reference doc (#6103)

* automatically-generated kubeadm reference doc * user-mantained kubeadm reference doc
2017-11-29 18:44:59 +01:00
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+Manage configuration for a kubeadm cluster persisted in a ConfigMap in the cluster.
+
+### Synopsis
+
+
+
+There is a ConfigMap in the kube-system namespace called "kubeadm-config" that kubeadm uses to store internal configuration about the
+cluster. kubeadm CLI v1.8.0+ automatically creates this ConfigMap with the config used with 'kubeadm init', but if you
+initialized your cluster using kubeadm v1.7.x or lower, you must use the 'config upload' command to create this
+ConfigMap. This is required so that 'kubeadm upgrade' can configure your upgraded cluster correctly.
+
+
+```
+kubeadm config
+```
+
+### Options
+
+```
+      --kubeconfig string   The KubeConfig file to use when talking to the cluster. (default "/etc/kubernetes/admin.conf")
+```
+