chore: always assume TRAEFIK_INSTANCE points to host.docker.internal

app.py

@@ -2,6 +2,7 @@ import base64
 import os
 import re
 import requests
+import urllib3
 from concurrent.futures import Future, ThreadPoolExecutor, wait as gather_futures
 
 import fabric
@@ -14,6 +15,8 @@ TRAEFIK_HOST = os.getenv('TRAEFIK_HOST') or ''
 INTERNAL_DESTS = (os.getenv('INTERNAL_DESTS') or '').split(',') or []
 EXTERNAL_DESTS = (os.getenv('EXTERNAL_DESTS') or '').split(',') or []
 PRIVATE_KEY = os.getenv('PRIVATE_KEY') or ''
+HOST = os.getenv('HOST') or '0.0.0.0'
+PORT = os.getenv('PORT') or '80'
 
 assert NODE_NAME != '_traefik'
 assert TRAEFIK_INSTANCE
@@ -49,10 +52,35 @@ class Observer:
     @classmethod
     def _init(cls):
         try:
-            data = requests.get(TRAEFIK_INSTANCE + '/rawdata').json()
-        except Exception: ...
-        else:
-            cls.update(data)
+            with urllib3.HTTPSConnectionPool(
+                'host.docker.internal',
+                server_hostname=TRAEFIK_INSTANCE
+            ) as pool:
+                runtime_conf = pool.request(
+                    'GET',
+                    '/api/rawdata',
+                    headers={'Host': TRAEFIK_INSTANCE},
+                    assert_same_host=False
+                ).json()
+        except Exception:
+            return
+        dynamic_conf = {
+            'http': {
+                'middlewares': runtime_conf.get('middlewares') or {},
+                'routers': runtime_conf.get('routers') or {},
+                'services': runtime_conf.get('services') or {},
+            },
+            'tcp': {
+                'middlewares': runtime_conf.get('tcpMiddlewares') or {},
+                'routers': runtime_conf.get('tcpRouters') or {},
+                'services': runtime_conf.get('tcpServices') or {},
+            },
+            'udp': {
+                'routers': runtime_conf.get('udpRouters') or {},
+                'services': runtime_conf.get('udpServices') or {},
+            }
+        }
+        cls.update(dynamic_conf)
         print("Initialized!")
 
 
@@ -97,7 +125,7 @@ class Observer:
 
     @classmethod
     def parse_raw_data(cls, data: dict):
-        http = (data.get('http') or {}) | (data.get('tcp') or {}) | (data.get('udp') or {}) or data
+        http = data.get('http') or {}
         flt = lambda ep: set([x.group(1) for x in [re.match(PATTERN, x['rule']) for x in http['routers'].values() if ep in x['entryPoints']] if x])
 
         internal = flt(INTERNAL_ENTRYPOINT)
@@ -120,6 +148,6 @@ def callback():
 
 if __name__ == "__main__":
     try:
-        app.run(host='0.0.0.0', port=80)
+        app.run(host=HOST, port=int(PORT))
     finally:
         Observer._close()