Send SMS to notify when IP cycles

.kubernetes/1-secret.yml

@@ -8,3 +8,5 @@ metadata:
 data:
   DDNS_ZONE: ${DDNS_ZONE}
   API_KEY: ${API_KEY}
+  SMS_API_KEY: ${SMS_API_KEY}
+  SMS_RECIPIENT: ${SMS_RECIPIENT}

main.py

@@ -1,12 +1,14 @@
 import os
 import requests
 from bulk_dns_update import updateAllZones, setAPIKey, getDDNSAddresszoneId
+from notify import notify
 from dotenv import load_dotenv
 from logger import logger
 
 load_dotenv()
 
 currentIP = None
+recordedIP = None
 DDNS_ZONE = os.getenv('DDNS_ZONE')
 
 
@@ -20,6 +22,7 @@ def publicAddress():
 
 
 def cloudflareDDNS():
+    global recordedIP
     logger.info('Checking IP recorded in Cloudflare...')
     ddnsRecord = getDDNSAddresszoneId(DDNS_ZONE)
     recordedIP = ddnsRecord['content']
@@ -27,9 +30,10 @@ def cloudflareDDNS():
 
     if currentIP != recordedIP:
         logger.info('Public IP has changed, updating all A records.')
-        updateAllZones(recordedIP, currentIP)
+        return True
     else:
         logger.info('is same, exiting')
+        return False
 
 
 def main():
@@ -42,7 +46,11 @@ def main():
     setAPIKey(apiKey)
 
     publicAddress()
-    cloudflareDDNS()
+    changed = cloudflareDDNS()
+
+    if changed:
+        notify("IP changed to: {}. Updating all cloudflare zones!".format(currentIP))
+        updateAllZones(recordedIP, currentIP)
 
 
 if __name__ == '__main__':

notify.py

@@ -0,0 +1,42 @@
+import base64
+import requests
+from os import getenv
+from json import dumps
+from logger import logger
+
+
+def notify(message):
+    SMS_API_KEY = getenv('SMS_API_KEY')
+    SMS_RECIPIENT = getenv('SMS_RECIPIENT')
+
+    if not SMS_API_KEY:
+        logger.info("No SMS API key found, not notifying")
+        return
+
+    if not SMS_RECIPIENT:
+        logger.info("No SMS recipient found, not notifying")
+        return
+
+    recipient = "47{}".format(SMS_RECIPIENT)
+    apiKey = base64.b64encode(SMS_API_KEY.encode("utf-8")).decode("utf-8")
+
+    logger.info("Notifying of IP change over SMS")
+    url = "https://gatewayapi.com/rest/mtsms"
+    payload = {
+        "sender": "Dynamic DNS",
+        "message": message,
+        "recipients": [{"msisdn": recipient}]
+    }
+    headers = {
+        "Host": "gatewayapi.com",
+        "Authorization": "Basic " + apiKey,
+        "Accept": "application/json",
+        "Content-Type": "application/json"
+    }
+
+    r = requests.post(url, data=dumps(payload), headers=headers)
+    response = r.json()
+
+    logger.info("Response from SMS api")
+    logger.info("Status: {} {}".format(str(r.status_code), str(r.reason)))
+    logger.info(response)