A simple container for updating your DNS domain with IP

You need :

• an AWS user with proper authorizations (strategies)
• a DNS A entry in a zone you can write in. My zone here is domain.com my A entry is sub.domain.com bound to IP 1.2.3.4 (whatever). This script doesn't create the A entry, it only modifies it.
• Docker installed :) Optionally docker-compose

you can find the AWS_ZONE_ID I'm talking about here: https://console.aws.amazon.com/route53/home#hosted-zones: Click on the line of your zone NOT the url. On the right panel you should see the ID

Create a dedicated user for this:

• go to IAM console then create an user with API access, click next
• create a new strategy (or use one you created with at least these below)
  • select service route53
  • Read access: ListResourceRecordSets
  • Write access: ChangeResourceRecordSets
  • Specify resource hostedzone restriction. copy paste the AWS_ZONE_ID.
  • Check then give a name and create the strategy
• back to the user creation, select the tab to attach existing strategies refresh the list of strategies then type or scroll to the name you just created then tick the checkbox
• Next until creation confirm.

To update the DNS sub.domain.com I need an identity in AWS with the correct role. at the end of user creation you get an ID and the KEY: I would recommend setting your environment variables in a file, I use .env and put these in:

AWS_ID=AWSUSERID23487
AWS_KEY=AWSKEY80247523485je39A/+3

#you can get this one in Route53
AWS_ZONE_ID=ZONEIDINROUTE53

DNS_FQDN=sub.domain.com

# TTL for the A record as we overwrite it. 
DNS_TTL=432000
# in seconds, the interval for the job
DNS_QUERY_INTERVAL=1800

docker run -d --env-file .env techunter/aws-dns-update:latest

docker-compose up -d

Comment the image line and uncomment the build line.

I took some parts from https://github.com/famzah/aws-dyndns so thank you :)