better backwards compatibility with old DNS name format for LBs #2171
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With #2011 we changed the default DNS name format template used when LoadBalancers are enabled. For backwards compatibility we are already appending a second DNS entry when the cluster name still starts with the team Id (mandatory before #2001), because we do not want to break existing connections.
For the old format we only assumed the default template value
"{cluster}.{team}.{hostedzone}". There's no option to specify what you have used before. If you have customized the template, all apps would need to be redeployed using the new DNS format. To avoid such a hassle this PR suggest to make the old format configurable withmaster|replica_old_dns_name_formatoptions.The unit test in cluster_test_go has be updated to also use a template different from the default value.