NO-JIRA: [bot] Bump openshift/prom-label-proxy to v0.12.1

.circleci/config.yml

@@ -7,7 +7,7 @@ executors:
   # also be updated.
   golang:
     docker:
-      - image: quay.io/prometheus/golang-builder:1.24-base
+      - image: quay.io/prometheus/golang-builder:1.25-base
 jobs:
   test:
     executor: golang

.github/workflows/golangci-lint.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
         with:
-          go-version: 1.24.x
+          go-version: 1.25.x
       - name: Install snmp_exporter/generator dependencies
         run: sudo apt-get update && sudo apt-get -y install libsnmp-dev
         if: github.repository == 'prometheus/snmp_exporter'

.promu.yml

@@ -1,7 +1,7 @@
 ---
 go:
     # This must match .circle/config.yml.
-    version: 1.24
+    version: 1.25
 repository:
     path: github.com/prometheus-community/prom-label-proxy
 build:

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.12.1 / 2025-09-11
+
+* [BUGFIX] Don't panic on `error-on-replace` with multiple values. #300
+
 ## 0.12.0 / 2025-08-06
 
 * [ENHANCEMENT] Add the `-enable-promql-duration-expression-parsing` flag to support arithmetic for durations in PromQL expressions. #297

VERSION

@@ -1 +1 @@
-0.12.0
+0.12.1

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/metalmatze/signal v0.0.0-20210307161603-1c9aa721a97a
 	github.com/oklog/run v1.2.0
 	github.com/prometheus/alertmanager v0.28.1
-	github.com/prometheus/client_golang v1.23.0
+	github.com/prometheus/client_golang v1.23.2
 	github.com/prometheus/prometheus v0.305.0
 	gotest.tools/v3 v3.5.2
 )
@@ -41,17 +41,18 @@ require (
 	github.com/oklog/ulid v1.3.1 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/common v0.65.0 // indirect
+	github.com/prometheus/common v0.66.1 // indirect
 	github.com/prometheus/procfs v0.16.1 // indirect
 	go.mongodb.org/mongo-driver v1.14.0 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 	go.opentelemetry.io/otel v1.36.0 // indirect
 	go.opentelemetry.io/otel/metric v1.36.0 // indirect
 	go.opentelemetry.io/otel/trace v1.36.0 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
-	golang.org/x/sync v0.15.0 // indirect
-	golang.org/x/sys v0.33.0 // indirect
-	golang.org/x/text v0.26.0 // indirect
-	google.golang.org/protobuf v1.36.6 // indirect
+	go.yaml.in/yaml/v2 v2.4.2 // indirect
+	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	golang.org/x/text v0.28.0 // indirect
+	google.golang.org/protobuf v1.36.8 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -176,17 +176,17 @@ github.com/prometheus/alertmanager v0.28.1/go.mod h1:0StpPUDDHi1VXeM7p2yYfeZgLVi
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.5.1/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
-github.com/prometheus/client_golang v1.23.0 h1:ust4zpdl9r4trLY/gSjlm07PuiBq2ynaXXlptpfy8Uc=
-github.com/prometheus/client_golang v1.23.0/go.mod h1:i/o0R9ByOnHX0McrTMTyhYvKE4haaf2mW08I+jGAjEE=
+github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
+github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
 github.com/prometheus/client_model v0.6.2/go.mod h1:y3m2F6Gdpfy6Ut/GBsUqTWZqCUvMVzSfMLjcu6wAwpE=
 github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 github.com/prometheus/common v0.9.1/go.mod h1:yhUN8i9wzaXS3w1O07YhxHEBxD+W35wd8bs7vj7HSQ4=
-github.com/prometheus/common v0.65.0 h1:QDwzd+G1twt//Kwj/Ww6E9FQq1iVMmODnILtW1t2VzE=
-github.com/prometheus/common v0.65.0/go.mod h1:0gZns+BLRQ3V6NdaerOhMbwwRbNh9hkGINtQAsP5GS8=
+github.com/prometheus/common v0.66.1 h1:h5E0h5/Y8niHc5DlaLlWLArTQI7tMrsfQjHV+d9ZoGs=
+github.com/prometheus/common v0.66.1/go.mod h1:gcaUsgf3KfRSwHY4dIMXLPV0K/Wg1oZ8+SbZk/HH/dA=
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+GxbHq6oeK9A=
@@ -206,8 +206,8 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
-github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
-github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 go.mongodb.org/mongo-driver v1.14.0 h1:P98w8egYRjYe3XDjxhYJagTokP/H6HzlsnojRgZRd80=
 go.mongodb.org/mongo-driver v1.14.0/go.mod h1:Vzb0Mk/pa7e6cWw85R4F/endUC3u0U9jGcNU603k65c=
 go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
@@ -226,6 +226,8 @@ go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
 go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
+go.yaml.in/yaml/v2 v2.4.2 h1:DzmwEr2rDGHl7lsFgAHxmNz/1NlQ7xLIrlN2h5d1eGI=
+go.yaml.in/yaml/v2 v2.4.2/go.mod h1:081UH+NErpNdqlCXm3TtEran0rJZGxAYx9hb/ELlsPU=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.39.0 h1:SHs+kF4LP+f+p14esP5jAoDpHU8Gu/v9lFRK6IT5imM=
@@ -234,25 +236,25 @@ golang.org/x/exp v0.0.0-20250106191152-7588d65b2ba8 h1:yqrTHse8TCMW1M1ZCP+VAR/l0
 golang.org/x/exp v0.0.0-20250106191152-7588d65b2ba8/go.mod h1:tujkw807nyEEAamNbDrEGzRav+ilXA7PCRAd6xsmwiU=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.41.0 h1:vBTly1HeNPEn3wtREYfy4GZ/NECgw2Cnl+nK6Nz3uvw=
-golang.org/x/net v0.41.0/go.mod h1:B/K4NNqkfmg07DQYrbwvSluqCJOOXwUjeb/5lOisjbA=
+golang.org/x/net v0.43.0 h1:lat02VYK2j4aLzMzecihNvTlJNQUq316m2Mr9rnM6YE=
+golang.org/x/net v0.43.0/go.mod h1:vhO1fvI4dGsIjh73sWfUVjj3N7CA9WkKJNQm2svM6Jg=
 golang.org/x/oauth2 v0.30.0 h1:dnDm7JmhM45NNpd8FDDeLhK6FwqbOf4MLCM9zb1BOHI=
 golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.15.0 h1:KWH3jNZsfyT6xfAfKiz6MRNmd46ByHDYaZ7KSkCtdW8=
-golang.org/x/sync v0.15.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
+golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
-golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/sys v0.35.0 h1:vz1N37gP5bs89s7He8XuIYXpyY0+QlsKmzipCbUtyxI=
+golang.org/x/sys v0.35.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.26.0 h1:P42AVeLghgTYr4+xUnTRKDMqpar+PtX7KWuNQL21L8M=
-golang.org/x/text v0.26.0/go.mod h1:QK15LZJUUQVJxhz7wXgxSy/CJaTFjd0G+YLonydOVQA=
+golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
+golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
 golang.org/x/time v0.12.0 h1:ScB/8o8olJvc+CQPWrK3fPZNfh7qgwCrY0zJmoEQLSE=
 golang.org/x/time v0.12.0/go.mod h1:CDIdPxbZBQxdj6cxyCIdrNogrJKMJ7pr37NYpMcMDSg=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -262,8 +264,8 @@ google.golang.org/genproto/googleapis/rpc v0.0.0-20250603155806-513f23925822 h1:
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250603155806-513f23925822/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
 google.golang.org/grpc v1.73.0 h1:VIWSmpI2MegBtTuFt5/JWy2oXxtjJ/e89Z70ImfD2ok=
 google.golang.org/grpc v1.73.0/go.mod h1:50sbHOUqWoCQGI8V2HQLJM0B+LMlIUjNSZmow7EVBQc=
-google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
-google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
+google.golang.org/protobuf v1.36.8 h1:xHScyCOEuuwZEc6UtSOvPbAT4zRh0xcNRYekJwfqyMc=
+google.golang.org/protobuf v1.36.8/go.mod h1:fuxRtAxBytpl4zzqUh6/eyUujkJdNiuEkXntxiD/uRU=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

injectproxy/enforce.go

@@ -16,6 +16,7 @@ package injectproxy
 import (
 	"errors"
 	"fmt"
+	"slices"
 
 	"github.com/prometheus/prometheus/model/labels"
 	"github.com/prometheus/prometheus/promql/parser"
@@ -229,30 +230,21 @@ func (ms PromQLEnforcer) EnforceMatchers(targets []*labels.Matcher) ([]*labels.M
 					ok = matcher.Matches(target.Value)
 				case labels.MatchNotEqual:
 					if frm != nil {
-						for _, sm := range frm.SetMatches() {
-							if target.Matches(sm) {
-								ok = true
-								break
-							}
+						if slices.ContainsFunc(frm.SetMatches(), target.Matches) {
+							ok = true
 						}
 					}
 					ok = ok || (target.Value == "" && !matcher.Matches(""))
 				case labels.MatchRegexp:
 					if frm != nil {
-						for _, sm := range frm.SetMatches() {
-							if target.Matches(sm) {
-								ok = true
-								break
-							}
+						if slices.ContainsFunc(frm.SetMatches(), target.Matches) {
+							ok = true
 						}
 					}
 				case labels.MatchNotRegexp:
 					if frm != nil {
-						for _, sm := range frm.SetMatches() {
-							if target.Matches(sm) {
-								ok = true
-								break
-							}
+						if slices.ContainsFunc(frm.SetMatches(), target.Matches) {
+							ok = true
 						}
 					}
 					ok = ok || (target.Value == "" && !matcher.Matches(""))
@@ -267,11 +259,8 @@ func (ms PromQLEnforcer) EnforceMatchers(targets []*labels.Matcher) ([]*labels.M
 				case labels.MatchRegexp:
 					frm, _ := labels.NewFastRegexMatcher(target.Value)
 					if frm != nil {
-						for _, sm := range frm.SetMatches() {
-							if matcher.Matches(sm) {
-								ok = true
-								break
-							}
+						if slices.ContainsFunc(frm.SetMatches(), matcher.Matches) {
+							ok = true
 						}
 					}
 					ok = ok && (target.Value != "" || !matcher.Matches(""))

injectproxy/routes.go

@@ -24,6 +24,7 @@ import (
 	"net/http/httputil"
 	"net/url"
 	"regexp"
+	"slices"
 	"sort"
 	"strings"
 
@@ -440,11 +441,9 @@ func (r *routes) errorHandler(rw http.ResponseWriter, _ *http.Request, err error
 
 func enforceMethods(h http.HandlerFunc, methods ...string) http.HandlerFunc {
 	return func(w http.ResponseWriter, req *http.Request) {
-		for _, m := range methods {
-			if m == req.Method {
-				h(w, req)
-				return
-			}
+		if slices.Contains(methods, req.Method) {
+			h(w, req)
+			return
 		}
 		http.NotFound(w, req)
 	}
@@ -510,40 +509,10 @@ func (r *routes) passthrough(w http.ResponseWriter, req *http.Request) {
 }
 
 func (r *routes) query(w http.ResponseWriter, req *http.Request) {
-	var matcher *labels.Matcher
-
-	if len(MustLabelValues(req.Context())) > 1 {
-		if r.regexMatch {
-			prometheusAPIError(w, "Only one label value allowed with regex match", http.StatusBadRequest)
-			return
-		}
-
-		matcher = &labels.Matcher{
-			Name:  r.label,
-			Type:  labels.MatchRegexp,
-			Value: labelValuesToRegexpString(MustLabelValues(req.Context())),
-		}
-	} else {
-		matcherType := labels.MatchEqual
-		matcherValue := MustLabelValue(req.Context())
-		if r.regexMatch {
-			compiledRegex, err := regexp.Compile(matcherValue)
-			if err != nil {
-				prometheusAPIError(w, err.Error(), http.StatusBadRequest)
-				return
-			}
-			if compiledRegex.MatchString("") {
-				prometheusAPIError(w, "Regex should not match empty string", http.StatusBadRequest)
-				return
-			}
-			matcherType = labels.MatchRegexp
-		}
-
-		matcher = &labels.Matcher{
-			Name:  r.label,
-			Type:  matcherType,
-			Value: matcherValue,
-		}
+	matcher, err := r.newLabelMatcher(MustLabelValues(req.Context())...)
+	if err != nil {
+		prometheusAPIError(w, err.Error(), http.StatusBadRequest)
+		return
 	}
 
 	e := NewPromQLEnforcer(r.errorOnReplace, matcher)
@@ -636,28 +605,18 @@ func (r *routes) newLabelMatcher(vals ...string) (*labels.Matcher, error) {
 			return nil, errors.New("regex should not match empty string")
 		}
 
-		m, err := labels.NewMatcher(labels.MatchRegexp, r.label, re)
-		if err != nil {
-			return nil, err
-		}
-
-		return m, nil
+		return labels.NewMatcher(labels.MatchRegexp, r.label, re)
 	}
 
 	if len(vals) == 1 {
-		return &labels.Matcher{
-			Name:  r.label,
-			Type:  labels.MatchEqual,
-			Value: vals[0],
-		}, nil
-	}
-
-	m, err := labels.NewMatcher(labels.MatchRegexp, r.label, labelValuesToRegexpString(vals))
-	if err != nil {
-		return nil, err
+		return labels.NewMatcher(
+			labels.MatchEqual,
+			r.label,
+			vals[0],
+		)
 	}
 
-	return m, nil
+	return labels.NewMatcher(labels.MatchRegexp, r.label, labelValuesToRegexpString(vals))
 }
 
 // matcher modifies all the match[] HTTP parameters to match on the tenant label.
@@ -763,7 +722,7 @@ func removeEmptyValues(slice []string) []string {
 }
 
 func trimValues(slice []string) []string {
-	for i := 0; i < len(slice); i++ {
+	for i := range slice {
 		slice[i] = strings.TrimSpace(slice[i])
 	}
 

injectproxy/routes_test.go

@@ -1043,6 +1043,14 @@ func TestQuery(t *testing.T) {
 			expCode:        http.StatusBadRequest,
 			expResponse:    nil,
 		},
+		{
+			name:           `Query with a vector selector, multiple values and errorOnReplace`,
+			labelv:         []string{"default", "default2"},
+			promQuery:      `up{namespace="other"}`,
+			errorOnReplace: true,
+			expCode:        http.StatusBadRequest,
+			expResponse:    nil,
+		},
 		{
 			name:           `Query with a vector selector in POST body and errorOnReplace`,
 			labelv:         []string{"default"},

injectproxy/rules.go

@@ -174,7 +174,7 @@ var errModifyResponseFailed = errors.New("failed to process the API response")
 // modifyAPIResponse unwraps the Prometheus API response, passes the enforced
 // label value and the response to the given function and finally replaces the
 // result in the response.
-func modifyAPIResponse(f func([]string, *http.Request, *apiResponse) (interface{}, error)) func(*http.Response) error {
+func modifyAPIResponse(f func([]string, *http.Request, *apiResponse) (any, error)) func(*http.Response) error {
 	return func(resp *http.Response) error {
 		if resp.StatusCode != http.StatusOK {
 			// Pass non-200 responses as-is.
@@ -209,7 +209,7 @@ func modifyAPIResponse(f func([]string, *http.Request, *apiResponse) (interface{
 	}
 }
 
-func (r *routes) filterRules(lvalues []string, req *http.Request, resp *apiResponse) (interface{}, error) {
+func (r *routes) filterRules(lvalues []string, req *http.Request, resp *apiResponse) (any, error) {
 	var rgs rulesData
 	if err := json.Unmarshal(resp.Data, &rgs); err != nil {
 		return nil, fmt.Errorf("can't decode rules data: %w", err)
@@ -280,7 +280,7 @@ func (r *routes) filterRules(lvalues []string, req *http.Request, resp *apiRespo
 	return &rulesData{RuleGroups: filtered}, nil
 }
 
-func (r *routes) filterAlerts(lvalues []string, _ *http.Request, resp *apiResponse) (interface{}, error) {
+func (r *routes) filterAlerts(lvalues []string, _ *http.Request, resp *apiResponse) (any, error) {
 	var data alertsData
 	if err := json.Unmarshal(resp.Data, &data); err != nil {
 		return nil, fmt.Errorf("can't decode alerts data: %w", err)