Merge pull request #68 from geoadmin/task-PB-1992-keepalive-greater-than-traefik

PB-1992: Add gunicorn keepalive env var

Author: sami-nouidri-swisstopo

README.md

@@ -181,3 +181,4 @@ The service is configured by Environment Variable:
 | ALLOWED_DOMAINS | `.*` | Comma separated list of regex that are allowed as domain in Origin header |
 | CACHE_CONTROL | `public, max-age=31536000` | Cache Control header value of the GET /generate endpoint |
 | CACHE_CONTROL_4XX | `public, max-age=3600` | Cache Control header for 4XX responses |
+| GUNICORN_KEEPALIVE | `2` | The [`keepalive`](https://docs.gunicorn.org/en/stable/settings.html#keepalive) setting passed to gunicorn. |

app/settings.py

@@ -21,5 +21,7 @@
 ALLOWED_DOMAINS_PATTERN = f"({'|'.join(ALLOWED_DOMAINS)})"
 TRAP_HTTP_EXCEPTIONS = True
 
+GUNICORN_KEEPALIVE = int(os.getenv('GUNICORN_KEEPALIVE', '2'))
+
 CACHE_CONTROL = os.getenv('CACHE_CONTROL', 'public, max-age=31536000')
 CACHE_CONTROL_4XX = os.getenv('CACHE_CONTROL_4XX', 'public, max-age=3600')

wsgi.py

@@ -4,6 +4,7 @@
 
 from app.app import app as application
 from app.helpers.utils import get_logging_cfg
+from app.settings import GUNICORN_KEEPALIVE
 
 
 class StandaloneApplication(BaseApplication):  # pylint: disable=abstract-method
@@ -34,6 +35,7 @@ def load(self):
         'worker_class': 'gevent',
         'workers': 2,  # scaling horizontally is left to Kubernetes
         'timeout': 60,
+        'keepalive': GUNICORN_KEEPALIVE,
         'logconfig_dict': get_logging_cfg()
     }
     StandaloneApplication(application, options).run()