bug: apisix’s upstream code and prometheus‘s code Inconsistency

[sumeng001]

Current Behavior

I'm using apisix response-rewrite to change the status code to 200, but the code in prometheus takes the upstream value 404. so the value of apisix_http_status in prometheus should distinguish between upstream_code and code. That is, one is the code returned by upstream, and the other is the code returned by apisix.

Expected Behavior

No response

Error Logs

[07/May/2024:15:40:34 +0800]|7921f83b9e523f23442d18a8578c5d51|0.019|10.100.250.113:19337|200|GET|http://ecs.example.com/fssc/02eb3863542e01fd9592400e906ce615.ico|HTTP/1.1|367|546|DIRECT/10.102.19.100:8080|application/json;charset=UTF-8|-|curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.44 zlib/1.2.3 libidn/1.18 libssh2/1.4.2|0.018|404|-|-|-|-|-|-|12880|17726|10|26832|OK|-
200 is apisix code
404 is upstream code

Steps to Reproduce

{
"uri": "/",
"name": "ecs.example.com_200",
"methods": [
"GET",
"POST",
"PUT",
"DELETE",
"PATCH",
"HEAD",
"OPTIONS",
"CONNECT",
"TRACE",
"PURGE"
],
"host": "ecs.example.com",
"plugins": {
"response-rewrite": {
"body": " ",
"status_code": 200
}
},
"upstream_id": "1369277",
"labels": {
"API_VERSION": "v1"
},
"status": 1
}

Environment

• APISIX version (run apisix version):3.2.0
• Operating system (run uname -a):Linux 4.19.0-4.el7.ucloud.x86_64 change: added doc of how to load plugin. #1 SMP Mon Dec 16 08:54:55 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
• OpenResty / Nginx version (run openresty -V or nginx -V):nginx version: openresty/1.21.4.2
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):{"hostname":"","boot_time":1711642728,"etcd_version":"3.5.0","version":"3.2.0","id":"710905a9-e853-4305-af4e-b2fd247fcb65"}
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):