Change or Insert a Route53 entry from the command line

change_route53_dns_entry.sh

#!/bin/bash

# change_route53_dns_entry.sh
# -John Taylor
# 2022-05-01

# Change or add a route53 DNS entry
# dependencies: the aws cli, jq
# a AWS profile that has IAM permissions for Route53 API calls

# a Route53 hosted zone
DOMAIN="example.com"

# what you want the IP address of the new or changed DNS entry to be
IP="127.0.0.1"

# the fully qualified host name
ENTRY="test.${DOMAIN}"

# which profile the aws cli command should use
AWS_PROFILE="default"

aws --profile ${AWS_PROFILE} route53 list-hosted-zones-by-name --dns-name ${DOMAIN} > hosted.json
ZONE=$(cat hosted.json| jq -r ".HostedZones | .[] | select(.Name|test(\"${DOMAIN}.\")) | .Id | ltrimstr(\"/hostedzone/\")")
cat > change.json <<EOF
{
    "Changes": [
        {
            "Action": "UPSERT",
            "ResourceRecordSet": {
                "Name": "${ENTRY}.",
                "Type": "A",
                "TTL": 300,
                "ResourceRecords": [
                    {
                        "Value": "${IP}"
                    }
                ]
            }
        }
    ]
}
EOF

echo "zone: ${ZONE}  ip: ${IP}  entry: ${ENTRY}"
aws --profile ${AWS_PROFILE} route53 change-resource-record-sets --hosted-zone-id ${ZONE} --change-batch file://./change.json

# You can check the status of the updates with this command:
# aws --profile ${AWS_PROFILE} route53 get-change --id CXXXXXXXXXXXXX

change_route53_dns_entry_optimized.sh

#!/bin/bash

# change_route53_dns_entry_optimized.sh
# -John Taylor
# 2022-05-01

# Change or add a route53 DNS entry
# this "optimized" version does not use any temporary files
# dependencies: the aws cli, jq
#               a AWS profile that has IAM permissions for Route53 API calls

DOMAIN="example.com"   # a Route53 hosted zone
IP="127.0.0.1"         # what you want the IP address of the new or changed DNS entry to be
ENTRY="test.${DOMAIN}" # the fully qualified host name
AWS_PROFILE="default"  # which profile the aws cli command should use

ZONE=$(aws --profile ${AWS_PROFILE} route53 list-hosted-zones-by-name --dns-name ${DOMAIN} | jq -r ".HostedZones | .[] | select(.Name|test(\"${DOMAIN}.\")) | .Id | ltrimstr(\"/hostedzone/\")")
aws --profile ${AWS_PROFILE} route53 change-resource-record-sets --hosted-zone-id ${ZONE} --change-batch file:///dev/stdin <<EOF
{
    "Changes": [
        {
            "Action": "UPSERT",
            "ResourceRecordSet": {
                "Name": "${ENTRY}.",
                "Type": "A",
                "TTL": 300,
                "ResourceRecords": [
                    {
                        "Value": "${IP}"
                    }
                ]
            }
        }
    ]
}
EOF