initial

dyndns-update.py

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+#!/usr/bin/env python
+
+## imports
+import json
+import ovh
+import requests
+import os, sys
+import logging
+import logging.handlers
+from dotenv import load_dotenv
+
+my_logger = logging.getLogger('MyLogger')
+my_logger.setLevel(logging.DEBUG)
+
+handler = logging.handlers.SysLogHandler(address = '/dev/log')
+formatter = logging.Formatter("dyndns-update: %(message)s")
+handler.setFormatter(formatter)
+
+my_logger.addHandler(handler)
+
+
+env_path = os.path.abspath ( os.path.join ( os.curdir, os.path.relpath('.env') ) )
+load_dotenv(verbose=True, dotenv_path=env_path)
+
+## constants
+client = ovh.Client(
+    endpoint=os.getenv('ENDPOINT'),               # Endpoint of API OVH Europe (List of available endpoints)
+    application_key=os.getenv('APP_KEY'),    # Application Key
+    application_secret=os.getenv('SECRET'), # Application Secret
+    consumer_key=os.getenv('CONSUMER_KEY'),       # Consumer Key
+)
+
+TMPFILE = '/tmp/lastIP'
+
+def get_ip():
+    r = requests.get('http://ipinfo.io')
+    return (r.json()['ip'])
+
+def get_record_id(zone,subdomain):
+    result = client.get('/domain/zone/' + zone + '/record', fieldType='A', subDomain=subdomain )
+#    print (json.dumps(result, indent=4))
+
+    return result[0]
+
+def set_record(zone, subdomain, ip):
+    id=get_record_id(zone,subdomain)
+
+    result = client.put('/domain/zone/joefix.it/record/' + str(id), subDomain=subdomain, target=ip, ttl=60)
+    return result 
+
+
+if len(sys.argv) > 2:
+    if os.path.exists(TMPFILE):
+        with open(TMPFILE) as file:
+            try:
+                lastIP=file.read()
+            except:
+                my_logger.critical('error reading ' + TMPFILE)
+    else:
+        lastIP = ''
+
+    currentIP = get_ip()
+
+    if lastIP == currentIP:
+        my_logger.debug ('IP has not changed since last call')
+        exit()
+
+
+    if (set_record  (sys.argv[1], sys.argv[2], currentIP) == None ):
+        my_logger.debug('IP of ' + sys.argv[2] + '.' + sys.argv[1] + ' successfully changed to ' + currentIP)
+
+    with open(TMPFILE, 'w') as file:
+        file.write(currentIP)
+
+else:
+  print('Updates IP record of SUBDOMAIN in ZONE to current IP from ipinfo.io\n\nUsage:\n' + sys.argv[0] + ' ZONE SUBDOMAIN')

env-example

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+ENDPOINT='ovh-eu'
+APP_KEY='xxx'
+SECRET='xxx'
+CONSUMER_KEY='xxx'
+

readme.md

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+# Update DNS to current IP
+
+Simple dyndns for OVH API.  
+
+Updates a A record to current IP.
+
+`dyndns-update zone subdomain`
+
+
+Install as user cronjob like
+
+`*/5 * * * * /home/user/ovh-dyndns/dyndns-update.py`
+
+with
+
+`$ crontab -e`
+