tzssangglass opened a new pull request #2442:
URL: https://github.com/apache/apisix/pull/2442
### What this PR does / why we need it:
<!--- Why is this change required? What problem does it solve? -->
Prometheus plugin `apisix_http_status` metric `route` tag Improve
recognition.
Originally, the `/apisix/prometheus/metrics` endpoint only showed the `id`
of the `router`.
However, if the route has `uris` or `hosts` parameters, the user does not
know the number of times an element in `uris` or `hosts` has been matched, the
collection of coarse granularity, and in Grafana to display the `id` of the
`route` is not friendly enough.
This PR adds two elements, `matched_uri` and `matched_host`, to the
`apisix_http_status` property of the `/apisix/prometheus/metrics` endpoint to
show in detail the elements that are matched in the `uris` or `hosts`.
Note: I added the parameter `curr_req_matched_record` to the `api_ctx` to
keep track of the `route` record for the current request match.
The `apisix_http_status` will look like this
```
apisix_http_status{code="200",route="",matched_uri="",matched_host="",service="localhost",node=""}
5
apisix_http_status{code="200",route="1",matched_uri="/hello",matched_host="",service="",node=""}
6
apisix_http_status{code="200",route="1",matched_uri="/hello",matched_host="",service="",node="127.0.0.1"}
20
apisix_http_status{code="200",route="2",matched_uri="/hello1",matched_host="",service="1",node="127.0.0.1"}
6
apisix_http_status{code="404",route="",matched_uri="",matched_host="",service="localhost",node=""}
6
apisix_http_status{code="404",route="3",matched_uri="/hello3",matched_host="",service="",node="127.0.0.1"}
2
```
<!--- If it fixes an open issue, please link to the issue here. -->
https://github.com/apache/apisix/issues/1574
### Pre-submission checklist:
* [x] Did you explain what problem does this PR solve? Or what new features
have been added?
* [ ] Have you added corresponding test cases?
* [ ] Have you modified the corresponding document?
* [x] Is this PR backward compatible?
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