44 lines
885 B
Bash
44 lines
885 B
Bash
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#!/usr/bin/env bash
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readonly HZ="${AWS_HOSTED_ZONE}"
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readonly DOMAIN="${HOSTNAME}"
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err() {
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echo "[$(date -u +'%Y-%m-%dT%H:%M:%S%:z')]: $*" >&2
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}
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main() {
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if ! [[ -x "$(command -v aws)" ]]; then
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err "aws cli not installed"; exit 1
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fi
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# Get the IP address.
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ip="$(dig -4 +short myip.opendns.com @resolver1.opendns.com)"
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if [[ -z "${ip}" ]]; then
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err "failed to get ip address"; exit 2
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fi
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printf "ip: %s\n" "${ip}"
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# Update the domains.
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update='{
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"Comment": "DDNS",
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"Changes": [
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{
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"Action": "UPSERT",
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"ResourceRecordSet": {
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"Name": "'"${DOMAIN}"'",
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"Type": "A",
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"TTL": 300,
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"ResourceRecords": [{ "Value": "'"${ip}"'" }]
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}
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}
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]
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}'
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printf "requesting update for %s\n" "${DOMAIN}"
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aws route53 change-resource-record-sets \
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--hosted-zone-id "${HZ}" \
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--change-batch "${update}"
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}
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main "$@"
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