Initial import

1 files changed, 28 insertions, 0 deletions

diff --git a/ddns.sh b/ddns.sh
new file mode 100755
index 0000000..6685597
--- /dev/null
+++ b/ddns.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+set -e
+
+UPDATE_FILE=$(tempfile -p ddns-)
+IP_ADDR=$(curl -ks https://mike.crute.me/ip)
+ZONE_ID=""
+HOSTNAME=""
+
+# Assert valid format of IP
+echo $IP_ADDR | egrep "[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}" > /dev/null 2>&1
+
+cat > $UPDATE_FILE <<EOF
+{ "Changes": [{
+    "Action": "UPSERT",
+    "ResourceRecordSet": {
+        "Name": "$HOSTNAME",
+        "Type": "A",
+        "TTL": 60,
+        "ResourceRecords": [{ "Value": "$IP_ADDR" }]
+    }}]
+}
+EOF
+
+aws route53 change-resource-record-sets --profile snoopydyndns --hosted-zone-id $ZONE_ID --change-batch "file://$UPDATE_FILE" > /dev/null
+rm $UPDATE_FILE
+
+logger "DDNS update completed"