Any tips for Tracing request and response timing line?

[ailenli]

Hi please consider below situation

a web browser send a request , which arrives haproxy at time A then request passthrough services and db ,we call it backend backend generates a response,whitch arrives haproxy at time B so , how can I statistic time cost ( time B- time A) It is very important for solving problems

best wishes ,thanks

[jcmoraisjr]

Hi, you can follow some of the following options:

• Use a tracing tool and configure unique-id-format, unique-id-header and the config-frontend configmap option;
• Log %Tr and/or any other interesting metric in a dedicated field of a graylog-like tool so you can use it to analyze event times; see also custom log;
• Perhaps you just want to follow the average time, if so you can collect http_response_time_average_seconds prometheus metric (you'll need ingress v0.10 or this exporter) or the rtime field from the csv.

Hth.