Domain Name

Add a DNS Entry to your DNS management system. You should only need to add a DNS entry for the user-facing ELB which is what you use to currently access Spinnaker. It typically has a name such as the one below

armoryspinnaker-prod-external-123456789.us-west-1.elb.amazonaws.com

Add a CNAME entry for the given ELB then make sure to update your DECK_HOST and API_HOST in your environment file in the /opt/spinnaker/env directory

DECK_HOST=http://spinnaker.mydomain.com
API_HOST=http://spinnaker.mydomain.com