Select “Cloud DNS” from menu on LHS.

Add domain (yourdomain.com) which shows up resource records for NameServers. These need using on the DNS name registrar's website.

Add new A record, same way in principe as any other dns, just googlified.

Test External access:-

[root@helium scripts]# nslookup test1.yourdomain.com  ns-cloud-d1.googledomains.com
Server:         ns-cloud-d1.googledomains.com
Address:        216.239.32.109#53
 
Name:   test1.yourdomain.com
Address: 10.10.10.10

In this case, the address was set to 10.10.10.10 just for a test URL.

[me@eb8470w ~]$ gcloud dns record-sets -z=yourdomain-com transaction start
Transaction started [transaction.yaml].
[me@eb8470w ~]$ 
[me@eb8470w ~]$ 
[me@eb8470w ~]$ gcloud dns --project yourdomain-production record-sets transaction add --zone="yourdomain-com" --name="test1.sub.yourdomain.com." --ttl=21600 --type=A "1.2.3.4"
Record addition appended to transaction at [transaction.yaml].
[me@eb8470w ~]$ gcloud dns record-sets -z=yourdomain-com transaction describe
additions:
- kind: dns#resourceRecordSet
  name: yourdomain.com.
  rrdatas:
  - ns-cloud-d1.googledomains.com. dns-admin.google.com. 1 21600 3600 1209600 300
  ttl: 21600
  type: SOA
- kind: dns#resourceRecordSet
  name: test1.sub.yourdomain.com.
  rrdatas:
  - 1.2.3.4
  ttl: 21600
  type: A
deletions:
- kind: dns#resourceRecordSet
  name: yourdomain.com.
  rrdatas:
  - ns-cloud-d1.googledomains.com. dns-admin.google.com. 0 21600 3600 1209600 300
  ttl: 21600
  type: SOA
[astringer@eb8470w ~]$ gcloud dns record-sets -z=yourdomain-com transaction execute
Executed transaction [transaction.yaml] for managed-zone [yourdomain-com].
Created [https://www.googleapis.com/dns/v1/projects/yourdomain-production/managedZones/yourdomain-com/changes/4].
ID  START_TIME                STATUS
4   2015-11-02T16:24:08.502Z  pending
[me@eb8470w ~]$ 

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