Bug 1271468

Description of problem:
Document used:- https://docs.openshift.org/latest/getting_started/administrators.html#running-in-a-docker-container 
I was trying to experiment today about deploy testing instance of openshift in my devel box which had already running kubernetes services and default ports are occupied by it. Now if I run openshift container as per document then It will exit and when I checked logs from docker then found it try to listen 7001 port which is already occupied by etcd running on devel box.

$ docker logs origin 
Generated new key pair as openshift.local.config/master/serviceaccounts.public.key and openshift.local.config/master/serviceaccounts.private.key
I1014 05:39:27.496912       1 plugins.go:71] No cloud provider specified.
I1014 05:39:27.545470       1 start_master.go:386] Starting master on 0.0.0.0:8443 (v1.0.6-519-g86b63be)
I1014 05:39:27.545508       1 start_master.go:387] Public master address is https://10.65.201.190:8443
I1014 05:39:27.545559       1 start_master.go:391] Using images from "openshift/origin-<component>:v1.0.6"
F1014 05:39:27.693065       1 etcd.go:65] Unable to start etcd: listen tcp 0.0.0.0:7001: bind: address already in use  

$ sudo netstat -ntpl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 127.0.0.1:10252         0.0.0.0:*               LISTEN      29396/kube-controll 
tcp        0      0 127.0.0.1:2380          0.0.0.0:*               LISTEN      29285/etcd          
tcp        0      0 127.0.0.1:10255         0.0.0.0:*               LISTEN      29623/kubelet       
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      29319/kube-apiserve 
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      874/sshd            
tcp        0      0 127.0.0.1:7001          0.0.0.0:*               LISTEN      29285/etcd          
tcp        0      0 127.0.0.1:10248         0.0.0.0:*               LISTEN      29623/kubelet       
tcp        0      0 127.0.0.1:10249         0.0.0.0:*               LISTEN      29570/kube-proxy    
tcp        0      0 127.0.0.1:10250         0.0.0.0:*               LISTEN      29623/kubelet       
tcp        0      0 127.0.0.1:10251         0.0.0.0:*               LISTEN      29428/kube-schedule 
tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN      29285/etcd          
tcp6       0      0 :::8081                 :::*                    LISTEN      12841/docker-proxy  
tcp6       0      0 :::8083                 :::*                    LISTEN      18931/docker-proxy  
tcp6       0      0 :::22                   :::*                    LISTEN      874/sshd            
tcp6       0      0 :::40001                :::*                    LISTEN      29570/kube-proxy    
tcp6       0      0 :::4194                 :::*                    LISTEN      29623/kubelet       
tcp6       0      0 :::9090                 :::*                    LISTEN      1/systemd           


Version-Release number of selected component (if applicable): 3.x


How reproducible:
Every time

Steps to Reproduce:
1. Setup a dev-box
2. start kubernetes and docker service on that dev box
3. try to run openshift container on that box

Actual results:
failed because of port conflict.

Expected results:
It should be better if it is mention as a Note to document that kubernetes service should not be running when you are running openshift/origin image so that it will avoid that confusion.

Additional info:
N/A