set flask app instances to log json in k8s clusters

sample-server/nginx.conf

@@ -0,0 +1,61 @@
+worker_processes  1;
+
+daemon off;
+
+error_log  /dev/stdout;
+
+events {
+    worker_connections  1024;
+}
+
+http {
+    default_type  application/octet-stream;
+    log_format json escape=json
+      '{'
+        '"timestamp":"$time_iso8601",'
+        '"msec":"$msec",'
+        '"request_id":"$request_id",'
+        '"remote_addr":"$remote_addr",'
+        '"remote_user":"$remote_user",'
+        '"request":"$request",'
+        '"status":$status,'
+        '"body_bytes_sent":$body_bytes_sent,'
+        '"referer":"$http_referer",'
+        '"user_agent":"$http_user_agent",'
+        '"http_x_forwarded_for":"$http_x_forwarded_for"'
+      '}';
+
+    keepalive_timeout  65;
+
+    server {
+        listen       8000;
+        server_name  localhost;
+
+        access_log /dev/stdout json;
+
+        location / {
+            try_files $uri @app;
+        }
+
+        location @app {
+            uwsgi_pass uwsgi://localhost:8080;
+            uwsgi_param  QUERY_STRING       $query_string;
+            uwsgi_param  REQUEST_METHOD     $request_method;
+            uwsgi_param  CONTENT_TYPE       $content_type;
+            uwsgi_param  CONTENT_LENGTH     $content_length;
+
+            uwsgi_param  REQUEST_URI        $request_uri;
+            uwsgi_param  PATH_INFO          $document_uri;
+            uwsgi_param  DOCUMENT_ROOT      $document_root;
+            uwsgi_param  SERVER_PROTOCOL    $server_protocol;
+            uwsgi_param  REQUEST_SCHEME     $scheme;
+            uwsgi_param  HTTPS              $https if_not_empty;
+
+            uwsgi_param  REMOTE_ADDR        $remote_addr;
+            uwsgi_param  REMOTE_PORT        $remote_port;
+            uwsgi_param  SERVER_PORT        $server_port;
+            uwsgi_param  SERVER_NAME        $server_name;
+            uwsgi_param  HTTP_X_REQUEST_ID  $request_id;
+        }
+    }
+}