Make OpenStack client region-aware (#91)

* Make OpenStack client region-aware

* Fix formatting

azimuth_schedule_operator/openstack.py

@@ -30,7 +30,7 @@ class Auth(httpx.Auth):
     def __init__(
         self, auth_url, application_credential_id, application_credential_secret
     ):
-        self.url = auth_url
+        self.url = auth_url.rstrip("/").removesuffix("/v3")
         self._application_credential_id = application_credential_id
         self._application_credential_secret = application_credential_secret
         self._token = None
@@ -157,10 +157,11 @@ def resource(self, name, prefix=None, plural_name=None, singular_name=None):
 class Cloud:
     """Object for interacting with OpenStack clouds."""
 
-    def __init__(self, auth, transport, interface):
+    def __init__(self, auth, transport, interface, region):
         self._auth = auth
         self._transport = transport
         self._interface = interface
+        self._region = region
         self._endpoints = {}
         # A map of api name to client
         self._clients = {}
@@ -186,7 +187,10 @@ async def __aenter__(self):
             entry["type"]: next(
                 ep["url"]
                 for ep in entry["endpoints"]
-                if ep["interface"] == self._interface
+                if (
+                    ep["interface"] == self._interface
+                    and (not self._region or ep["region"] == self._region)
+                )
             )
             for entry in response.json()["catalog"]
             if len(entry["endpoints"]) > 0
@@ -242,7 +246,9 @@ def from_clouds(clouds, cloud, cacert):
     if cacert is not None:
         context.load_verify_locations(cadata=cacert)
     transport = httpx.AsyncHTTPTransport(verify=context)
-    return Cloud(auth, transport, config.get("interface", "public"))
+    return Cloud(
+        auth, transport, config.get("interface", "public"), config.get("region_name")
+    )
 
 
 def from_secret_data(secret_data):