Make uncloud host running

uncloud/api/main.py

@@ -590,11 +590,10 @@ def main(debug=False, port=None):
     #         json.dumps(data),
     #     )
 
-    if port:
-        app_port = port
-
     try:
-        app.run(host="::", debug=False)
+        app.run(host="::",
+                port=port,
+                debug=debug)
     except OSError as e:
         raise UncloudException("Failed to start Flask: {}".format(e))
 

uncloud/host/main.py

@@ -1,6 +1,7 @@
 import argparse
 import multiprocessing as mp
 import time
+from uuid import uuid4
 
 from uncloud.common.request import RequestEntry, RequestType
 from uncloud.shared import shared
@@ -42,7 +43,21 @@ def maintenance(host):
 def main(hostname):
     host_pool = shared.host_pool
     host = next(filter(lambda h: h.hostname == hostname, host_pool.hosts), None)
-    assert host is not None, "No such host with name = {}".format(hostname)
+
+    # Does not yet exist, create it
+    if not host:
+        host_key = join_path(
+            settings["etcd"]["host_prefix"], uuid4().hex
+        )
+        host_entry = {
+            "specs": "",
+            "hostname": hostname,
+            "status": "DEAD",
+            "last_heartbeat": "",
+        }
+        shared.etcd_client.put(
+            host_key, host_entry, value_in_json=True
+        )
 
     try:
         heartbeat_updating_process = mp.Process(target=update_heartbeat, args=(hostname,))