Bug 1869387 - Create CNAME instead of Alias Records for AWS GovCloud Regions
Summary: Create CNAME instead of Alias Records for AWS GovCloud Regions
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Routing
Version: 4.6
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: 4.6.0
Assignee: Daneyon Hansen
QA Contact: Hongan Li
Depends On:
TreeView+ depends on / blocked
Reported: 2020-08-17 19:25 UTC by Daneyon Hansen
Modified: 2020-10-27 16:28 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2020-10-27 16:28:36 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Github openshift cluster-ingress-operator pull 439 0 None closed Bug 1869387: Adds CNAME support to AWS DNS 2020-11-13 22:50:18 UTC
Red Hat Product Errata RHBA-2020:4196 0 None None None 2020-10-27 16:28:53 UTC

Description Daneyon Hansen 2020-08-17 19:25:15 UTC
Description of problem:
From [1]:

"You can create private hosted zones in the AWS GovCloud (US). In general, the functionality is the same as for private hosted zones in the global version of Route 53. However, you can create alias records only when the alias target is another record in the same hosted zone. To route traffic to another AWS resource, such as an ELB load balancer or an S3 bucket, you can use a CNAME record instead of an alias record unless you're creating a record at the zone apex."

When the platform is AWS and the region is "us-gov-west-1" or "us-gov-east-1", the Ingress Operator should use a CNAME record type when creating the ingress domain wildcard record.

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

How reproducible:

Steps to Reproduce:
1. N/A

Actual results:
The ingress domain wildcard record is not created due to the limitations specified in [1].

Expected results:
The ingress domain wildcard record is created due to the limitations specified in [1].

Additional info:
[1] https://docs.aws.amazon.com/govcloud-us/latest/UserGuide/govcloud-r53.html

Comment 1 Daneyon Hansen 2020-08-17 19:29:36 UTC
xref: https://github.com/openshift/installer/pull/4043 )installer fix for same bug)

Comment 4 Hongan Li 2020-09-10 02:32:26 UTC
verified with 4.6.0-0.nightly-2020-09-09-021653 and passed.

$ oc get clusterversion
NAME      VERSION                             AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.6.0-0.nightly-2020-09-09-021653   True        False         75m     Cluster version is 4.6.0-0.nightly-2020-09-09-021653

$ aws --profile gov --region us-gov-west-1 route53 list-resource-record-sets --hosted-zone-id $zone_id --query 'ResourceRecordSets[?contains(Name,`apps`)==`true`]'
        "Name": "\\052.apps.yunjiang-debug7.qe.devcluster.openshift.com.",
        "Type": "CNAME",
        "TTL": 30,
        "ResourceRecords": [
                "Value": "internal-ad61fd41e2ca545658d7a1c49de4782d-1800445331.us-gov-west-1.elb.amazonaws.com"

  dnsName: '*.apps.yunjiang-debug7.qe.devcluster.openshift.com.'
  recordTTL: 30
  recordType: CNAME
  - internal-ad61fd41e2ca545658d7a1c49de4782d-1800445331.us-gov-west-1.elb.amazonaws.com

  platform: AWS
      region: us-gov-west-1

Comment 6 errata-xmlrpc 2020-10-27 16:28:36 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (OpenShift Container Platform 4.6 GA Images), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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