Setting a trace id in nginx load balancer

Question

I\'m using nginx as a load balancer in front of several upstream app servers and I want to set a trace id to use to correlate requests with the app server logs. What\'s the bes

Answer 1

nginx 1.11.0 added the new variable $request_id which is a unique identifier, so you can do something like:

   location / {
      proxy_pass http://upstream;
      proxy_set_header X-Request-Id $request_id;
   }

See reference at http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_id