64 lines
1.6 KiB
Bash
64 lines
1.6 KiB
Bash
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#!/bin/bash
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#Variable Declaration - Change These
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HOSTED_ZONE_ID="Z2LZR966I2PUGA"
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NAME="links.xira.co.uk."
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TYPE="A"
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TTL=60
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#get current IP address
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IP=$(curl http://checkip.amazonaws.com/)
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#validate IP address (makes sure Route 53 doesn't get updated with a malformed payload)
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if [[ ! $IP =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
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exit 1
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fi
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#get current
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/usr/local/bin/aws route53 list-resource-record-sets --hosted-zone-id $HOSTED_ZONE_ID | \
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jq -r '.ResourceRecordSets[] | select (.Name == "'"$NAME"'") | select (.Type == "'"$TYPE"'") | .ResourceRecords[0].Value' > /tmp/current_route53_value
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cat /tmp/current_route53_value
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#check if IP is different from Route 53
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if grep -Fxq "$IP" /tmp/current_route53_value; then
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echo "IP Has Not Changed, Exiting"
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curl -m 10 --retry 5 https://hc-ping.com/db1e44d4-7975-4738-8805-01eba58ec826
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exit 1
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fi
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echo "IP Changed, Updating Records"
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#prepare route 53 payload
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cat > /tmp/route53_changes.json << EOF
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{
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"Comment":"Updated From DDNS Shell Script",
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"Changes":[
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{
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"Action":"UPSERT",
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"ResourceRecordSet":{
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"ResourceRecords":[
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{
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"Value":"$IP"
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}
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],
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"Name":"$NAME",
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"Type":"$TYPE",
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"TTL":$TTL
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}
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}
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]
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}
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EOF
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#update records
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/usr/local/bin/aws route53 change-resource-record-sets --hosted-zone-id $HOSTED_ZONE_ID --change-batch file:///tmp/route53_changes.json >> /dev/null
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# if good
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curl -m 10 --retry 5 https://hc-ping.com/db1e44d4-7975-4738-8805-01eba58ec826/99
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