[GitHub] [apisix] gxthrj commented on issue #2501: [discuss]: How to distinguish whether the 5xx status code (eg 500) comes from upstream or apisix

[GitBox <gi...@apache.org>]

gxthrj commented on issue #2501:
URL: https://github.com/apache/apisix/issues/2501#issuecomment-716373824


   I agree with this idea, it will speed up the speed of finding problems out, no need to check the log.
   We can add `x-apisix-upstream-*` in the response header.
   e.g.
   
   When upstream returns 5xx, we get a response like this
   ```
   < HTTP/1.1 5xx *********
   < Date: xxx
   < Content-Type: application/json; charset=UTF-8
   < Connection: keep-alive
   < Server: apisix/1.5.0
   < X-Apisix-Upstream-address: 10.10.10.10:8080
   < Via: apisix/1.5.0
   ```
   When upstream times out, we can get a response like this
   ```
   < HTTP/1.1 504 Gateway Time-out
   < Date: xxx
   < Content-Type: application/json; charset=UTF-8
   < Connection: keep-alive
   < Server: apisix/1.5.0
   < X-Apisix-Upstream-Latency: 30002
   < Via: apisix/1.5.0
   ```


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