feat: add support for log aggregators

fixtures/logFormatters.template

@@ -0,0 +1,32 @@
+map $time_iso8601 $time_iso8601_dateTime {
+  ~([^+]+) $1;
+}
+map $time_iso8601 $time_iso8601_TZ {
+  ~\+([0-9:]+)$ $1;
+}
+map $msec $millisec {
+  ~\.([0-9]+)$ $1;
+}
+
+log_format json escape=json '{ "nginx_timestamp": "$time_iso8601_dateTime.$millisec+$time_iso8601_TZ", '
+       '"remote_addr": "$remote_addr", '
+       '"connection": "$connection", '
+       '"connection_requests": $connection_requests, '
+       '"pipe": "$pipe", '
+       '"body_bytes_sent": $body_bytes_sent, '
+       '"request_length": $request_length, '
+       '"request_time": $request_time, '
+       '"response_status": $status, '
+       '"request": "$request", '
+       '"request_method": "$request_method", '
+       '"host": "$host", '
+       '"upstream_cache_status": "$upstream_cache_status", '
+       '"upstream_addr": "$upstream_addr", '
+       '"http_x_forwarded_for": "$http_x_forwarded_for", '
+       '"http_referrer": "$http_referer", '
+       '"http_user_agent": "$http_user_agent", '
+       '"http_version": "$server_protocol", '
+       '"remote_user": "$remote_user", '
+       '"http_x_forwarded_proto": "$http_x_forwarded_proto", '
+       '"upstream_response_time": "$upstream_response_time", '
+       '"nginx_access": true }';

fixtures/metrics.template

@@ -5,9 +5,10 @@ map $status $omitOKs {
 
 server {
     listen 8080;
-    access_log /dev/stdout combined if=$omitOKs;
+    error_log stderr;
+    access_log /dev/stdout {{{ logFormat }}} if=$omitOKs;
     location /metrics {
-      vhost_traffic_status_display;
-      vhost_traffic_status_display_format prometheus;
+        vhost_traffic_status_display;
+        vhost_traffic_status_display_format prometheus;
     }
 }