Track number of get series request requests in QFE (#5373)

* track get series request requests

Signed-off-by: Ben Ye <[email protected]>

* update changelog

Signed-off-by: Ben Ye <[email protected]>

---------

Signed-off-by: Ben Ye <[email protected]>

Author: yeya24

CHANGELOG.md

@@ -63,6 +63,7 @@
 * [ENHANCEMENT] All: Handling CMK Access Denied errors. #5420 #5542
 * [ENHANCEMENT] Querier: Retry store gateway client connection closing gRPC error. #5558
 * [ENHANCEMENT] QueryFrontend: Add generic retry for all APIs. #5561.
+* [ENHANCEMENT] QueryFrontend: Add metric for number of series requests. #5373
 * [BUGFIX] Ruler: Validate if rule group can be safely converted back to rule group yaml from protobuf message #5265
 * [BUGFIX] Querier: Convert gRPC `ResourceExhausted` status code from store gateway to 422 limit error. #5286
 * [BUGFIX] Alertmanager: Route web-ui requests to the alertmanager distributor when sharding is enabled. #5293

pkg/querier/tripperware/roundtrip.go

@@ -127,10 +127,13 @@ func NewQueryTripperware(
 			return RoundTripFunc(func(r *http.Request) (*http.Response, error) {
 				isQuery := strings.HasSuffix(r.URL.Path, "/query")
 				isQueryRange := strings.HasSuffix(r.URL.Path, "/query_range")
+				isSeries := strings.HasSuffix(r.URL.Path, "/series")
 
 				op := "query"
 				if isQueryRange {
 					op = "query_range"
+				} else if isSeries {
+					op = "series"
 				}
 
 				tenantIDs, err := tenant.TenantIDs(r.Context())