domains – Uly.me

How to change DNS records in Route 53 via AWS CLI.

Assuming AWS CLI is already configured
Uses Route53 change-resource-record-sets to update DNS records
Substitute with your own hosted-zone-id
Uses JSON files containing record sets
See JSON file examples below

cd /path/to/scripts/
# the command to switch to the elb
aws route53 change-resource-record-sets --hosted-zone-id xxxxxxxxxxxxxx --change-batch file://elb.json
# the command to switch to standard site
aws route53 change-resource-record-sets --hosted-zone-id xxxxxxxxxxxxxx --change-batch file://live.json

elb.json = points to AWS ELB (elastic load balancer)

{
   "Comment": "back to elb",
   "Changes": [
      {
         "Action": "UPSERT",
         "ResourceRecordSet": {
            "Name": "yourdomain.com",
            "Type": "A",
            "AliasTarget": {
               "HostedZoneId": "xxxxxxxxxxxxxx",
               "EvaluateTargetHealth": false,
               "DNSName": "xxxxxxxxxxxxx.us-east-1.elb.amazonaws.com."
            }
         }
      }
   ]
}

live.json = points to your standard site. Value is your IP Address.

{
   "Comment": "back to live",
   "Changes": [
      {
         "Action": "UPSERT",
         "ResourceRecordSet": {
            "Name": "yourdomain.com",
            "Type": "A",
            "TTL": 60,
            "ResourceRecords": [
               {
                  "Value": "xxx.xxx.xxx.xxx"
               }
            ]
         }
      }
   ]
}

Here’s a Bash and Perl script for sorting domains and subdomains.

Command:

$ cat filename | perl -ple'$_=join".",reverse split/\./' | sort | perl -ple'$_=join".",reverse split/\./'

What’s in the domains.txt?

$ cat domains.txt
domain.com
abc.com
xyz.com
bbb.com
mail.gmail.com
ess.sfss.org
csub.edu
gmail.com

Result:

$ cat domains.txt | perl -ple'$_=join".",reverse split/\./' | sort | perl -ple'$_=join".",reverse split/\./'
abc.com
bbb.com
domain.com
gmail.com
mail.gmail.com
xyz.com
csub.edu
ess.sfss.org

You can also pipe the result to another file.

$ cat filename | perl -ple'$_=join".",reverse split/\./' | sort | perl -ple'$_=join".",reverse split/\./' > output.txt

Source.

Change DNS Records in Route 53 via CLI

Domain Sorter