Bug 1895270

Document URL: 

* Adding RHEL compute machines to an OpenShift Container Platform cluster
  [ https://docs.openshift.com/container-platform/4.6/machine_management/user_infra/adding-rhel-compute.html ] 

Section Number and Name: 

* Preparing a RHEL compute node
  [ https://docs.openshift.com/container-platform/4.6/machine_management/user_infra/adding-rhel-compute.html#rhel-preparing-node_adding-rhel-compute ]

Describe the issue: 

Networkmanager-ovs[0] and openvswitch2.13[1] packages are required to install worker node using playbooks as of OCv4.6.
But the additional package repositories for those additional packages does not provided in the related section and it causes scaleup.yml playbook failure. 

e.g.> missing "NetowrkManager-ovs"
~~~
    "msg": "No package matching 'NetworkManager-ovs' found available, installed or updated", 
    "rc": 126, 
:
        "No package matching 'NetworkManager-ovs' found available, installed or updated"
    ]
}
~~~

e.g.> missing "openvswtich2.13"
~~~
        "No package matching 'openvswitch2.13' found available, installed or updated"
    ], 
    "retries": 4
}
~~~

* Required repository for above each missing package as follows.

  // For Networkmanager-ovs
  subscription-manager repos --enable="rhel-7-server-optional-rpms"

  // For openvswitch2.13
  subscription-manager repos --enable="rhel-7-fast-datapath-rpms"

  [0] https://bugzilla.redhat.com/show_bug.cgi?id=1884095
  [1] https://bugzilla.redhat.com/show_bug.cgi?id=1874324

Suggestions for improvement: 

Fix it as follows.
~~~
6. 

Enable only the repositories required by OpenShift Container Platform 4.6:

# subscription-manager repos \
    --enable="rhel-7-server-rpms" \
    --enable="rhel-7-server-extras-rpms" \
    --enable="rhel-7-server-ose-4.6-rpms" \
    --enable="rhel-7-server-optional-rpms" \
    --enable="rhel-7-fast-datapath-rpms"
~~~

Additional information: