Add DDNS service to the Pi

roles/cloudflare-ddns/files/cloudflare_ddns/ip_helpers.py

@@ -0,0 +1,27 @@
+import logging
+import requests
+import dns.resolver
+
+
+def get_public_IP():
+    logging.info('Retrieving the public IP for this machine...')
+    response = requests.get('https://api.ipify.org?format=json')
+
+    if response.status_code != 200:
+        raise Exception('Something went wrong requesting the public ip, exiting...')
+
+    public_ip = response.json()['ip']
+    logging.info(f'The public IP address for this machine is: {public_ip}.')
+    return public_ip
+
+def resolve_name(domain):
+    logging.info(f'Resolving {domain}...')
+    try:
+        result = dns.resolver.resolve(domain, 'A')
+    except dns.resolver.NXDOMAIN:
+        logging.error(f'No DNS record exists for {domain}, configure it first before using this ddns script. Exiting...')
+        exit(1)
+
+    resolved_address = result[0].address
+    logging.info(f'Resolved {domain} to: {resolved_address}.')
+    return resolved_address