commit 62ed50730a83ea79c2c1315b467b15e4c999e903
parent e5aff051f6a2bbff3930bebe6a83bb83aefd1234
Author: dwrz <dwrz@dwrz.net>
Date: Thu, 27 Oct 2022 20:05:00 +0000
Add ddns script
Diffstat:
| A | scripts/ddns | | | 45 | +++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 45 insertions(+), 0 deletions(-)
diff --git a/scripts/ddns b/scripts/ddns
@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+
+readonly HZ="${AWS_HOSTED_ZONE}"
+readonly DOMAIN="${HOSTNAME}"
+
+err() {
+ echo "[$(date -u +'%Y-%m-%dT%H:%M:%S%:z')]: $*" >&2
+}
+
+main() {
+ if ! [[ -x "$(command -v aws)" ]]; then
+ err "aws cli not installed"; exit 1
+ fi
+
+ # Get the IP address.
+ ip="$(dig -4 +short myip.opendns.com @resolver1.opendns.com)"
+ if [[ -z "${ip}" ]]; then
+ err "failed to get ip address"; exit 2
+ fi
+ printf "ip: %s\n" "${ip}"
+
+ # Update the domains.
+ update='{
+ "Comment": "DDNS",
+ "Changes": [
+ {
+ "Action": "UPSERT",
+ "ResourceRecordSet": {
+ "Name": "'"${DOMAIN}"'",
+ "Type": "A",
+ "TTL": 300,
+ "ResourceRecords": [{ "Value": "'"${ip}"'" }]
+ }
+ }
+ ]
+}'
+
+ printf "requesting update for %s\n" "${DOMAIN}"
+ aws route53 change-resource-record-sets \
+ --hosted-zone-id "${HZ}" \
+ --change-batch "${update}"
+}
+
+main "$@"
+\ No newline at end of file
