Bug 1734127

Summary:	routes without <clustername> prefix directly on <basedomain>
Product:	OpenShift Container Platform	Reporter:	mmariyan
Component:	Networking	Assignee:	Dan Mace <dmace>
Networking sub component:	DNS	QA Contact:	Hongan Li <hongli>
Status:	CLOSED NOTABUG	Docs Contact:
Severity:	medium
Priority:	unspecified	CC:	aos-bugs, openshift-bugs-escalate, rsunog
Version:	4.1.0
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Last Closed:	2019-07-30 13:51:01 UTC	Type:	Bug
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Description mmariyan 2019-07-29 16:45:44 UTC

Description of problem:

In ocp 4.x the wildcard routes are creating like ".apps.<clustername>.<basedomain>. when we tried to change this like only to use basedomain .<basedomain>.com in the default ingresscontroller domain its not able to resolve it's creating a new wildcard in the private zone.

> when adding the second"ingress controller with only the basedoamin, This creates a second deployment of the routers, creates a loadbalancer on AWS and tries to create the DNS records on Route53. This works for the public zone (which is automatically set to ".<basedoamin>"), but fails with the internal, private zone because this is set to "clustername.basdoamin".

> now the requirement is all the application should use the subdomain only my domainname not with <clustername>.<domainname>

Ex:
  
 like this 
  ```
  https://console-openshift-console.example1.com 
  ```

not like

 ```
 https://console-openshift-console.apps.myclustername.example1.com

 ```

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

OCP 4.1

How reproducible:


Steps to Reproduce:
1. Install OCP 4.1 Cluster on AWS with openshift-installer
2. After installation `oc edit ingress.config.opneshift.io/cluster`
3. Change spec.domain and remove apps.<clustername>. from it.

Actual results:

its not resolving

Expected results:

it should work as per the change

Additional info: