v1.0.53: file-based tracker with fcntl.flock (multi-worker gunicorn fix)

site/app.py

@@ -6,7 +6,7 @@ from routes.main import bp as main_bp
 from routes.api import bp as api_bp
 from routes.api_test import bp as api_test_bp
 
-VERSION = "1.0.52"
+VERSION = "1.0.53"
 
 app = Flask(__name__, template_folder="templates", static_folder="static")
 app.config["NUBES_API_ENDPOINT"] = os.getenv("NUBES_API_ENDPOINT", "https://lk-api-gateway-dev.ngcloud.ru/api/v1/svc")

site/operations/tracker.py

@@ -1,9 +1,11 @@
-"""Трекер созданных инстансов — in-memory dict (один gunicorn worker)."""
+"""Трекер созданных инстансов — файловый с fcntl.flock (multi-worker gunicorn)."""
-import threading
+import fcntl
+import json
+import os
 
-_LOCK = threading.Lock()
+_PATH = "/tmp/instances.json"
 
-_data = {
+_INITIAL = {
     "408b7f96-6ed7-4985-be1b-f5bdcb6ab44d": {"svcId": 1, "displayName": "autotest-1", "instanceUid": "408b7f96-6ed7-4985-be1b-f5bdcb6ab44d"},
     "884356cf-5212-4395-b56b-27c58a5fc1fa": {"svcId": 1, "displayName": "autotest-1-first", "instanceUid": "884356cf-5212-4395-b56b-27c58a5fc1fa"},
     "6528854d-a4ea-428c-9fa4-68e85fa9b3ac": {"svcId": 1, "displayName": "curl-test-144834", "instanceUid": "6528854d-a4ea-428c-9fa4-68e85fa9b3ac"},
@@ -11,20 +13,62 @@ _data = {
 }
 
 
+def _locked_read():
+    """Читает файл под эксклюзивной блокировкой, seed при отсутствии."""
+    try:
+        fd = os.open(_PATH, os.O_RDWR | os.O_CREAT, 0o644)
+    except OSError:
+        return dict(_INITIAL)
+    try:
+        fcntl.flock(fd, fcntl.LOCK_EX)
+        try:
+            data = os.read(fd, 65536)
+            if data:
+                return json.loads(data.decode("utf-8"))
+        except (json.JSONDecodeError, UnicodeDecodeError):
+            pass
+        # Файл пуст или битый — пишем _INITIAL
+        data = dict(_INITIAL)
+        os.lseek(fd, 0, 0)
+        os.ftruncate(fd, 0)
+        os.write(fd, json.dumps(data, indent=2).encode("utf-8"))
+        return data
+    finally:
+        fcntl.flock(fd, fcntl.LOCK_UN)
+        os.close(fd)
+
+
+def _locked_write(data):
+    """Пишет файл под эксклюзивной блокировкой."""
+    try:
+        fd = os.open(_PATH, os.O_RDWR | os.O_CREAT, 0o644)
+    except OSError:
+        return
+    try:
+        fcntl.flock(fd, fcntl.LOCK_EX)
+        os.lseek(fd, 0, 0)
+        os.ftruncate(fd, 0)
+        os.write(fd, json.dumps(data, indent=2).encode("utf-8"))
+    finally:
+        fcntl.flock(fd, fcntl.LOCK_UN)
+        os.close(fd)
+
+
 def add(instance_uid, svc_id, display_name):
-    with _LOCK:
+    data = _locked_read()
-        _data[instance_uid] = {
+    data[instance_uid] = {
-            "svcId": svc_id,
+        "svcId": svc_id,
-            "displayName": display_name,
+        "displayName": display_name,
-            "instanceUid": instance_uid,
+        "instanceUid": instance_uid,
-        }
+    }
+    _locked_write(data)
 
 
 def remove(instance_uid):
-    with _LOCK:
+    data = _locked_read()
-        _data.pop(instance_uid, None)
+    data.pop(instance_uid, None)
+    _locked_write(data)
 
 
 def list_all():
-    with _LOCK:
+    return list(_locked_read().values())
-        return list(_data.values())