fix: kube-vip leader election + Gunicorn gevent, bump 1.0.8→1.0.9

History/2026-07-10-combined-fix.md

@@ -0,0 +1,37 @@
+# 2026-07-10 — Комбинированный фикс
+
+## Два корня
+1. kube-vip ARP без лидера → флаппинг между 4 нодами при каждом новом TCP
+2. Werkzeug всегда `Connection: close` → новый TCP на каждый запрос
+
+По отдельности не чинят. Вместе должны.
+
+## План
+### 1. kube-vip: vip_leaderelection=true
+```bash
+kubectl set env ds/shturval-vip -n kube-vip vip_leaderelection=true
+```
+
+### 2. Flask: Gunicorn + gevent
+```python
+# app.py
+if __name__ == '__main__':
+    import gunicorn.app.base
+    class StandaloneApp(gunicorn.app.base.BaseApplication):
+        def __init__(self, app, options=None):
+            self.application = app; self.options = options or {}
+            super().__init__()
+        def load_config(self):
+            for k, v in self.options.items(): self.cfg.set(k, v)
+        def load(self): return self.application
+    StandaloneApp(app, {
+        'bind': '0.0.0.0:5000', 'workers': 2,
+        'worker_class': 'gevent', 'timeout': 120, 'keepalive': 75,
+    }).run()
+```
+
+### 3. requirements.txt
+flask, gunicorn, gevent
+
+### 4. ingress
+proxy_request_buffering: off (уже)

requirements.txt

@@ -1,2 +1,3 @@
 flask
 gunicorn
+gevent

site/app.py

@@ -4,7 +4,7 @@ from flask import Flask, render_template, request
 
 app = Flask(__name__)
 
-VERSION = '1.0.8'
+VERSION = '1.0.9'
 
 
 @app.route('/')
@@ -51,4 +51,25 @@ def upload():
 
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0', port=5000, debug=False, threaded=True)
+    import gunicorn.app.base
+
+    class StandaloneApp(gunicorn.app.base.BaseApplication):
+        def __init__(self, app, options=None):
+            self.application = app
+            self.options = options or {}
+            super().__init__()
+
+        def load_config(self):
+            for k, v in self.options.items():
+                self.cfg.set(k, v)
+
+        def load(self):
+            return self.application
+
+    StandaloneApp(app, {
+        'bind': '0.0.0.0:5000',
+        'workers': 2,
+        'worker_class': 'gevent',
+        'timeout': 120,
+        'keepalive': 75,
+    }).run()