feat: include request url in the datasource unexpected status code er…

…ror message (#243)

Co-authored-by: Dmytro Kozlov <[email protected]>

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## tip
 
+* FEATURE: include request url in the `got unexpected response status code` error message for troubleshooting.
+  Thanks to @chenlujjj for [the pull request](https://github.com/VictoriaMetrics/victoriametrics-datasource/pull/243).
+
 * BUGFIX: fix issue with variables not working in adhoc filters. See [this issue](https://github.com/VictoriaMetrics/victoriametrics-datasource/issues/235).
 
 ## [v0.10.3](https://github.com/VictoriaMetrics/victoriametrics-datasource/releases/tag/v0.10.3)
@@ -22,7 +25,7 @@
 
 * BUGFIX: fixed healthcheck
 
-## [v0.10.0](https://github.com/VictoriaMetrics/victoriametrics-datasource/releases/tag/v0.10.0) 
+## [v0.10.0](https://github.com/VictoriaMetrics/victoriametrics-datasource/releases/tag/v0.10.0)
 
 * FEATURE: set the default query type to `instant` when creating alerting rules. See [this issue](https://github.com/VictoriaMetrics/victoriametrics-datasource/issues/205).
 
@@ -40,7 +43,7 @@
 ## [v0.8.5](https://github.com/VictoriaMetrics/victoriametrics-datasource/releases/tag/v0.8.5)
 
 * BUGFIX: restore support for Grafana versions below `10.0.0`. See [this issue](https://github.com/VictoriaMetrics/victoriametrics-datasource/issues/159).
-* BUGFIX: fix issue with forwarding headers from datasource to the backend or proxy. 
+* BUGFIX: fix issue with forwarding headers from datasource to the backend or proxy.
   It might be helpful if a user wants to use some kind of authentication. See [this issue](https://github.com/VictoriaMetrics/victorialogs-datasource/issues/54).
 
 ## [v0.8.4](https://github.com/VictoriaMetrics/victoriametrics-datasource/releases/tag/v0.8.4)

pkg/plugin/datasource.go

@@ -142,7 +142,7 @@ func (d *Datasource) query(ctx context.Context, query backend.DataQuery) backend
 	}()
 
 	if resp.StatusCode != http.StatusOK {
-		err = fmt.Errorf("got unexpected response status code: %d", resp.StatusCode)
+		err = fmt.Errorf("got unexpected response status code: %d with request url: %q", resp.StatusCode, reqURL)
 		return newResponseError(err, backend.Status(resp.StatusCode))
 	}