kubeadm: add page (#2495)

pages/common/kubeadm.md

@@ -0,0 +1,31 @@
+# kubeadm
+
+> Command line interface for creating and managing Kubernetes clusters.
+
+- Create a Kubernetes master node:
+
+`kubeadm init`
+
+- Bootstrap a Kubernetes worker node and join it to a cluster:
+
+`kubeadm join --token {{token}}`
+
+- Create a new bootstrap token with a TTL of 12 hours:
+
+`kubeadm token create --ttl {{12h0m0s}}`
+
+- Check if the Kubernetes cluster is upgradeable and which versions are available:
+
+`kubeadm upgrade plan`
+
+- Upgrade Kubernetes cluster to a specified version:
+
+`kubeadm upgrade apply {{version}}`
+
+- View the kubeadm ConfigMap containing the cluster's configuration:
+
+`kubeadm config view`
+
+- Revert changes made to the host by 'kubeadm init' or 'kubeadm join':
+
+`kubeadm reset`