Optimize nginx configuration (#124)

* Optimize nginx configuration

- Use aio
- Use HTTP/1.1 and keepalive on backend proxy connections

Author: kare

custom-nginx-reverse-proxy.conf

@@ -1,17 +1,28 @@
-worker_processes 1;
+worker_processes auto;
 
-events { worker_connections 1024; }
+events {
+    accept_mutex on;
+    multi_accept on;
+    worker_connections 512;
+}
 
 http {
     include mime.types;
     server_names_hash_bucket_size 128;
     sendfile on;
-    
-    proxy_buffers 8 1024k;  
+
+    proxy_buffers 8 1024k;
     proxy_buffer_size 1024k;
+    aio on;
+    directio 4m;
+    tcp_nopush on;
+    tcp_nodelay on;
 
     upstream eae {
         server 10.200.10.1:8081;
+        keepalive 20;
+        keepalive_requests 50;
+        keepalive_timeout 60s;
     }
 
     upstream platform {
@@ -25,11 +36,17 @@ http {
     upstream brokers_ws {
         server 10.200.10.1:8690;
         server 10.200.10.1:8790;
+        keepalive 20;
+        keepalive_requests 50;
+        keepalive_timeout 60s;
     }
 
     upstream brokers_http {
         server 10.200.10.1:8691;
         server 10.200.10.1:8791;
+        keepalive 20;
+        keepalive_requests 50;
+        keepalive_timeout 60s;
     }
 
     upstream storage_http {
@@ -90,18 +107,24 @@ http {
             add_header X-debug "/api/v1/streams";
             proxy_pass http://storage_http;
             proxy_read_timeout 240s;
+            proxy_http_version 1.1;
+            proxy_set_header Connection "";
         }
 
         # Data Volume endpoint
         location /api/v1/volume {
             add_header X-debug "/api/v1/volume";
             proxy_pass http://brokers_http;
             proxy_read_timeout 240s;
+            proxy_http_version 1.1;
+            proxy_set_header Connection "";
         }
 
         # Network explorer
         location /network-explorer/ {
             proxy_pass http://network_explorer$request_uri;
+            proxy_http_version 1.1;
+            proxy_set_header Connection "";
         }
 
         ### API ENDPOINTS PROXIED TO ENGINE-AND-EDITOR ###
@@ -124,14 +147,17 @@ http {
             proxy_set_header X-Forwarded-Port $server_port;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
             proxy_set_header X-Request-URI $request_uri;
-
+            proxy_set_header Connection "";
+            proxy_http_version 1.1;
             proxy_pass http://eae$uri;
         }
 
         ### Utility paths proxied to the Ethereum nodes in the docker stack. Useful if SSL is terminated at nginx ###
 
         location /mainchain-rpc/http/ {
             proxy_pass http://mainchain_rpc_http/;
+            proxy_http_version 1.1;
+            proxy_set_header Connection "";
         }
 
         location /mainchain-rpc/ws/ {
@@ -145,6 +171,8 @@ http {
 
         location /sidechain-rpc/http/ {
             proxy_pass http://sidechain_rpc_http/;
+            proxy_http_version 1.1;
+            proxy_set_header Connection "";
         }
 
         location /sidechain-rpc/ws/ {
@@ -178,6 +206,8 @@ http {
             proxy_set_header   X-Real-IP $remote_addr;
             proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
             proxy_set_header   X-Forwarded-Host $server_name;
+            proxy_http_version 1.1;
+            proxy_set_header Connection "";
         }
 
     }