Document URL: 
https://access.redhat.com/documentation/en/openshift-enterprise/version-3.0/openshift-enterprise-30-administrator-guide#adding-nodes

Section Number and Name: 
4.3 Adding Nodes

Describe the issue: 
The docs reference using oc create for adding a node, rather, it should tell the user how to run the installer (when the installer wrapper supports adding nodes) or running ansible with a modified inventory when using the advanced installation method.

Alternatively, we can also list the manual steps, which will consist of the following:
- on the first master (the one with the CA): run `oadm create-node-config` with the proper arguments
- copy the generated files over to the node in the /etc/openshift/node directory (will be /etc/origin/node for AE and OSE 3.1)
- verify the /etc/openshift/node-config.yaml file is configured correctly
- start the openshift-node service
- verify the new node shows up under `oc get nodes`