connection pooling

Author: Rider-Linden

Dockerfile

@@ -16,6 +16,8 @@ ENV STATIC_LOCATIONS=
 ENV NO_ACCESS_LOGS=0
 ENV LOG_ONLY_5XX=0
 ENV WORKER_CONNECTIONS=1024
+ENV KEEPALIVE_CONNECTIONS=32
+ENV KEEPALIVE_REQUESTS=1000
 
 EXPOSE 80
 STOPSIGNAL SIGQUIT

README.md

@@ -23,7 +23,9 @@ Pair nginx-proxy with your favorite upstream server (wsgi, uwsgi, asgi, et al.)
 | `SILENT` | Silence entrypoint output | No | | |
 | `STATIC_LOCATIONS` | Static asset mappings | No | | |
 | `PROXY_UWSGI` | Whether to use native uwsgi support | No | 0 | 1 |
-| `KEEPALIVE_TIMEOUT` | What value to set HTTP keepalive (This should be higher than your ELB's timeout) | Yes | 65 | |
+| `KEEPALIVE_TIMEOUT` | HTTP keepalive timeout and upstream connection timeout | Yes | 65 | |
+| `KEEPALIVE_CONNECTIONS` | Number of idle connections to keep alive to upstream | No | 32 | 64 |
+| `KEEPALIVE_REQUESTS` | Number of requests per upstream connection before recycling | No | 1000 | 2000 |
 | `HEALTHCHECK_PATH` | nginx-proxy disables healthcheck path access logs, you can configure the path here | Yes | /lb-status/ | |
 | `NO_ACCESS_LOGS` | disable access logs completely | No | 0 | 1 |
 | `LOG_ONLY_5XX` | only log 5XX HTTP status access events | No | 0 | 1 |

src/etc/nginx/conf.d/default.conf.template

@@ -10,6 +10,9 @@ server {
 
 upstream app {
   server {{ .Env.UPSTREAM_SERVER }};
+  keepalive {{ .Env.KEEPALIVE_CONNECTIONS }};
+  keepalive_requests {{ .Env.KEEPALIVE_REQUESTS }};
+  keepalive_timeout {{ .Env.KEEPALIVE_TIMEOUT }}s;
 }
 
 server {

src/etc/nginx/includes/uwsgi.conf.template

@@ -1,6 +1,7 @@
 uwsgi_pass app;
 uwsgi_param HTTP_X_REQUEST_ID $request_id;
 uwsgi_param HTTP_HOST $host;
+uwsgi_param CONNECTION "";          # Clear Connection header for keepalive
 include uwsgi_params;
 uwsgi_read_timeout {{ .Env.WSGI_TIMEOUT }};
 uwsgi_send_timeout {{ .Env.WSGI_TIMEOUT }};