add settings for the domain list

Author: olethanh

src/aleph/vm/conf.py

@@ -189,6 +189,8 @@ class Settings(BaseSettings):
     INIT_TIMEOUT: float = 20.0
 
     CONNECTOR_URL: HttpUrl = HttpUrl("http://localhost:4021")
+    # To fetch the list of domain mapping for the ipv4 domain features
+    DOMAIN_SERVICE_URL: HttpUrl = HttpUrl("https://api.dns.public.aleph.sh/instances/list")
 
     CACHE_ROOT: Path = Path("/var/cache/aleph/vm")
     MESSAGE_CACHE: Path | None = Field(

src/aleph/vm/haproxy.py

@@ -26,6 +26,8 @@
 
 import aiohttp
 
+from aleph.vm.conf import settings
+
 # This should match the config in haproxy.cfg
 HAPROXY_BACKENDS = [
     {
@@ -283,7 +285,7 @@ def update_haproxy_backends(socket_path, backend_name, map_file_path, weight=1):
 
 async def fetch_list() -> list[dict]:
     async with aiohttp.ClientSession() as client:
-        resp = await client.get(url="https://api.dns.public.aleph.sh/instances/list")
+        resp = await client.get(url=settings.DOMAIN_SERVICE_URL)
         resp.raise_for_status()
         instances = await resp.json()
         if len(instances) == 0: