chore!: adopt log/slog, drop go-kit/log (#1311)

* chore!: adopt log/slog, drop go-kit/log

The bulk of this change set was automated by the following script which
is being used to aid in converting the various exporters/projects to use
slog:

https://gist.github.com/tjhop/49f96fb7ebbe55b12deee0b0312d8434

Other changes included:
- upgrade go in ci to 1.23
- update client_golang, common, exporter-toolkit

Signed-off-by: TJ Hoplock <[email protected]>

* build: don't specify toolchain in go.mod

Address PR feedback, not necessary. Can always be re-added.

Signed-off-by: TJ Hoplock <[email protected]>

---------

Signed-off-by: TJ Hoplock <[email protected]>

.circleci/config.yml

@@ -5,7 +5,7 @@ executors:
   # Whenever the Go version is updated here, .promu.yml should also be updated.
   golang:
     docker:
-      - image: cimg/go:1.22
+      - image: cimg/go:1.23
 jobs:
   test:
     executor: golang
@@ -22,7 +22,7 @@ jobs:
     working_directory: /home/circleci/.go_workspace/src/github.com/prometheus/blackbox_exporter
     # Whenever the Go version is updated here, .promu.yml should also be updated.
     environment:
-      DOCKER_TEST_IMAGE_NAME: quay.io/prometheus/golang-builder:1.22-base
+      DOCKER_TEST_IMAGE_NAME: quay.io/prometheus/golang-builder:1.23-base
     steps:
       - checkout
       - run:

.golangci.yml

@@ -4,3 +4,4 @@ linters:
   enable:
     - misspell
     - staticcheck
+    - sloglint

.promu.yml

@@ -1,6 +1,6 @@
 go:
     # Whenever the Go version is updated here, .circle/config.yml should also be updated.
-    version: 1.22
+    version: 1.23
 repository:
     path: github.com/prometheus/blackbox_exporter
 build:

config/config.go

@@ -16,6 +16,7 @@ package config
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"math"
 	"net/textproto"
 	"os"
@@ -30,8 +31,6 @@ import (
 	yaml "gopkg.in/yaml.v3"
 
 	"github.com/alecthomas/units"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/miekg/dns"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
@@ -104,7 +103,7 @@ func NewSafeConfig(reg prometheus.Registerer) *SafeConfig {
 	return &SafeConfig{C: &Config{}, configReloadSuccess: configReloadSuccess, configReloadSeconds: configReloadSeconds}
 }
 
-func (sc *SafeConfig) ReloadConfig(confFile string, logger log.Logger) (err error) {
+func (sc *SafeConfig) ReloadConfig(confFile string, logger *slog.Logger) (err error) {
 	var c = &Config{}
 	defer func() {
 		if err != nil {
@@ -133,7 +132,7 @@ func (sc *SafeConfig) ReloadConfig(confFile string, logger log.Logger) (err erro
 			module.HTTP.NoFollowRedirects = nil
 			c.Modules[name] = module
 			if logger != nil {
-				level.Warn(logger).Log("msg", "no_follow_redirects is deprecated and will be removed in the next release. It is replaced by follow_redirects.", "module", name)
+				logger.Warn("no_follow_redirects is deprecated and will be removed in the next release. It is replaced by follow_redirects.", "module", name)
 			}
 		}
 	}

go.mod

@@ -1,18 +1,17 @@
 module github.com/prometheus/blackbox_exporter
 
-go 1.21
+go 1.22
 
 require (
 	github.com/alecthomas/kingpin/v2 v2.4.0
 	github.com/alecthomas/units v0.0.0-20231202071711-9a357b53e9c9
 	github.com/andybalholm/brotli v1.1.0
-	github.com/go-kit/log v0.2.1
 	github.com/miekg/dns v1.1.62
-	github.com/prometheus/client_golang v1.20.4
+	github.com/prometheus/client_golang v1.20.5
 	github.com/prometheus/client_model v0.6.1
-	github.com/prometheus/common v0.57.0
-	github.com/prometheus/exporter-toolkit v0.11.0
-	golang.org/x/net v0.28.0
+	github.com/prometheus/common v0.60.1
+	github.com/prometheus/exporter-toolkit v0.13.0
+	golang.org/x/net v0.29.0
 	google.golang.org/grpc v1.67.0
 	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.1
@@ -22,19 +21,20 @@ require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
-	github.com/go-logfmt/logfmt v0.5.1 // indirect
 	github.com/jpillora/backoff v1.0.0 // indirect
 	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/mdlayher/socket v0.4.1 // indirect
+	github.com/mdlayher/vsock v1.2.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/xhit/go-str2duration/v2 v2.1.0 // indirect
-	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/crypto v0.27.0 // indirect
 	golang.org/x/mod v0.18.0 // indirect
-	golang.org/x/oauth2 v0.22.0 // indirect
+	golang.org/x/oauth2 v0.23.0 // indirect
 	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.24.0 // indirect
-	golang.org/x/text v0.17.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+	golang.org/x/text v0.18.0 // indirect
 	golang.org/x/tools v0.22.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 // indirect
 	google.golang.org/protobuf v1.34.2 // indirect

go.sum

@@ -13,10 +13,6 @@ github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSV
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-kit/log v0.2.1 h1:MRVx0/zhvdseW+Gza6N9rVzU/IVzaeE1SFI4raAhmBU=
-github.com/go-kit/log v0.2.1/go.mod h1:NwTd00d/i8cPZ3xOwwiv2PO5MOcx78fFErGNcVmBjv0=
-github.com/go-logfmt/logfmt v0.5.1 h1:otpy5pqBCBZ1ng9RQ0dPu4PN7ba75Y/aA+UpowDyNVA=
-github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
@@ -30,6 +26,10 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
+github.com/mdlayher/socket v0.4.1 h1:eM9y2/jlbs1M615oshPQOHZzj6R6wMT7bX5NPiQvn2U=
+github.com/mdlayher/socket v0.4.1/go.mod h1:cAqeGjoufqdxWkD7DkpyS+wcefOtmu5OQ8KuoJGIReA=
+github.com/mdlayher/vsock v1.2.1 h1:pC1mTJTvjo1r9n9fbm7S1j04rCgCzhCOS5DY0zqHlnQ=
+github.com/mdlayher/vsock v1.2.1/go.mod h1:NRfCibel++DgeMD8z/hP+PPTjlNJsdPOmxcnENvE+SE=
 github.com/miekg/dns v1.1.62 h1:cN8OuEF1/x5Rq6Np+h1epln8OiyPWV+lROx9LxcGgIQ=
 github.com/miekg/dns v1.1.62/go.mod h1:mvDlcItzm+br7MToIKqkglaGhlFMHJ9DTNNWONWXbNQ=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
@@ -38,14 +38,14 @@ github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f h1:KUppIJq7/+
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.20.4 h1:Tgh3Yr67PaOv/uTqloMsCEdeuFTatm5zIq5+qNN23vI=
-github.com/prometheus/client_golang v1.20.4/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
+github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y=
+github.com/prometheus/client_golang v1.20.5/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
 github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
 github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
-github.com/prometheus/common v0.57.0 h1:Ro/rKjwdq9mZn1K5QPctzh+MA4Lp0BuYk5ZZEVhoNcY=
-github.com/prometheus/common v0.57.0/go.mod h1:7uRPFSUTbfZWsJ7MHY56sqt7hLQu3bxXHDnNhl8E9qI=
-github.com/prometheus/exporter-toolkit v0.11.0 h1:yNTsuZ0aNCNFQ3aFTD2uhPOvr4iD7fdBvKPAEGkNf+g=
-github.com/prometheus/exporter-toolkit v0.11.0/go.mod h1:BVnENhnNecpwoTLiABx7mrPB/OLRIgN74qlQbV+FK1Q=
+github.com/prometheus/common v0.60.1 h1:FUas6GcOw66yB/73KC+BOZoFJmbo/1pojoILArPAaSc=
+github.com/prometheus/common v0.60.1/go.mod h1:h0LYf1R1deLSKtD4Vdg8gy4RuOvENW2J/h19V5NADQw=
+github.com/prometheus/exporter-toolkit v0.13.0 h1:lmA0Q+8IaXgmFRKw09RldZmZdnvu9wwcDLIXGmTPw1c=
+github.com/prometheus/exporter-toolkit v0.13.0/go.mod h1:2uop99EZl80KdXhv/MxVI2181fMcwlsumFOqBecGkG0=
 github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
 github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
@@ -56,20 +56,20 @@ github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsT
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/xhit/go-str2duration/v2 v2.1.0 h1:lxklc02Drh6ynqX+DdPyp5pCKLUQpRT8bp8Ydu2Bstc=
 github.com/xhit/go-str2duration/v2 v2.1.0/go.mod h1:ohY8p+0f07DiV6Em5LKB0s2YpLtXVyJfNt1+BlmyAsU=
-golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
-golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.27.0 h1:GXm2NjJrPaiv/h1tb2UH8QfgC/hOf/+z0p6PT8o1w7A=
+golang.org/x/crypto v0.27.0/go.mod h1:1Xngt8kV6Dvbssa53Ziq6Eqn0HqbZi5Z6R0ZpwQzt70=
 golang.org/x/mod v0.18.0 h1:5+9lSbEzPSdWkH32vYPBwEpX8KwDbM52Ud9xBUvNlb0=
 golang.org/x/mod v0.18.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/net v0.28.0 h1:a9JDOJc5GMUJ0+UDqmLT86WiEy7iWyIhz8gz8E4e5hE=
-golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
-golang.org/x/oauth2 v0.22.0 h1:BzDx2FehcG7jJwgWLELCdmLuxk2i+x9UDpSiss2u0ZA=
-golang.org/x/oauth2 v0.22.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
+golang.org/x/net v0.29.0 h1:5ORfpBpCs4HzDYoodCDBbwHzdR5UrLBZ3sOnUJmFoHo=
+golang.org/x/net v0.29.0/go.mod h1:gLkgy8jTGERgjzMic6DS9+SP0ajcu6Xu3Orq/SpETg0=
+golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs=
+golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
 golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ=
 golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sys v0.24.0 h1:Twjiwq9dn6R1fQcyiK+wQyHWfaz/BJB+YIpzU/Cv3Xg=
-golang.org/x/sys v0.24.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.17.0 h1:XtiM5bkSOt+ewxlOE/aE/AKEHibwj/6gvWMl9Rsh0Qc=
-golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
+golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
+golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.18.0 h1:XvMDiNzPAl0jr17s6W9lcaIhGUfUORdGCNsuLmPG224=
+golang.org/x/text v0.18.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
 golang.org/x/tools v0.22.0 h1:gqSGLZqv+AI9lIQzniJ0nZDRG5GBPsSi+DRNHWNz6yA=
 golang.org/x/tools v0.22.0/go.mod h1:aCwcsjqvq7Yqt6TNyX7QMU2enbQ/Gt0bo6krSeEri+c=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 h1:e7S5W7MGGLaSu8j3YjdezkZ+m1/Nm0uRVRMEMGk26Xs=

main.go

@@ -29,13 +29,12 @@ import (
 	"syscall"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	versioncollector "github.com/prometheus/client_golang/prometheus/collectors/version"
 	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	"github.com/prometheus/common/promlog"
-	"github.com/prometheus/common/promlog/flag"
+	"github.com/prometheus/common/promslog"
+	"github.com/prometheus/common/promslog/flag"
 	"github.com/prometheus/common/version"
 	"github.com/prometheus/exporter-toolkit/web"
 	webflag "github.com/prometheus/exporter-toolkit/web/kingpinflag"
@@ -51,7 +50,7 @@ var (
 	configFile     = kingpin.Flag("config.file", "Blackbox exporter configuration file.").Default("blackbox.yml").String()
 	timeoutOffset  = kingpin.Flag("timeout-offset", "Offset to subtract from timeout in seconds.").Default("0.5").Float64()
 	configCheck    = kingpin.Flag("config.check", "If true validate the config file and then exit.").Default().Bool()
-	logLevelProber = kingpin.Flag("log.prober", "Log level from probe requests. One of: [debug, info, warn, error, none]").Default("none").String()
+	logLevelProber = kingpin.Flag("log.prober", "Log level from probe requests. One of: [debug, info, warn, error]").Default("info").String()
 	historyLimit   = kingpin.Flag("history.limit", "The maximum amount of items to keep in the history.").Default("100").Uint()
 	externalURL    = kingpin.Flag("web.external-url", "The URL under which Blackbox exporter is externally reachable (for example, if Blackbox exporter is served via a reverse proxy). Used for generating relative and absolute links back to Blackbox exporter itself. If the URL has a path portion, it will be used to prefix all HTTP endpoints served by Blackbox exporter. If omitted, relevant URL components will be derived automatically.").PlaceHolder("<url>").String()
 	routePrefix    = kingpin.Flag("web.route-prefix", "Prefix for the internal routes of web endpoints. Defaults to path of --web.external-url.").PlaceHolder("<path>").String()
@@ -73,46 +72,46 @@ func main() {
 
 func run() int {
 	kingpin.CommandLine.UsageWriter(os.Stdout)
-	promlogConfig := &promlog.Config{}
-	flag.AddFlags(kingpin.CommandLine, promlogConfig)
+	promslogConfig := &promslog.Config{}
+	flag.AddFlags(kingpin.CommandLine, promslogConfig)
 	kingpin.Version(version.Print("blackbox_exporter"))
 	kingpin.HelpFlag.Short('h')
 	kingpin.Parse()
-	logger := promlog.New(promlogConfig)
+	logger := promslog.New(promslogConfig)
 	rh := &prober.ResultHistory{MaxResults: *historyLimit}
 
-	logLevelProberValue, _ := level.Parse(*logLevelProber)
-	logLevelProber := level.Allow(logLevelProberValue)
+	allowedLevel := &promslog.AllowedLevel{}
+	_ = allowedLevel.Set(*logLevelProber)
 
-	level.Info(logger).Log("msg", "Starting blackbox_exporter", "version", version.Info())
-	level.Info(logger).Log("build_context", version.BuildContext())
+	logger.Info("Starting blackbox_exporter", "version", version.Info())
+	logger.Info(version.BuildContext())
 
 	if err := sc.ReloadConfig(*configFile, logger); err != nil {
-		level.Error(logger).Log("msg", "Error loading config", "err", err)
+		logger.Error("Error loading config", "err", err)
 		return 1
 	}
 
 	if *configCheck {
-		level.Info(logger).Log("msg", "Config file is ok exiting...")
+		logger.Info("Config file is ok exiting...")
 		return 0
 	}
 
-	level.Info(logger).Log("msg", "Loaded config file")
+	logger.Info("Loaded config file")
 
 	// Infer or set Blackbox exporter externalURL
 	listenAddrs := toolkitFlags.WebListenAddresses
 	if *externalURL == "" && *toolkitFlags.WebSystemdSocket {
-		level.Error(logger).Log("msg", "Cannot automatically infer external URL with systemd socket listener. Please provide --web.external-url")
+		logger.Error("Cannot automatically infer external URL with systemd socket listener. Please provide --web.external-url")
 		return 1
 	} else if *externalURL == "" && len(*listenAddrs) > 1 {
-		level.Info(logger).Log("msg", "Inferring external URL from first provided listen address")
+		logger.Info("Inferring external URL from first provided listen address")
 	}
 	beURL, err := computeExternalURL(*externalURL, (*listenAddrs)[0])
 	if err != nil {
-		level.Error(logger).Log("msg", "failed to determine external URL", "err", err)
+		logger.Error("failed to determine external URL", "err", err)
 		return 1
 	}
-	level.Debug(logger).Log("externalURL", beURL.String())
+	logger.Debug(beURL.String())
 
 	// Default -web.route-prefix to path of -web.external-url.
 	if *routePrefix == "" {
@@ -126,7 +125,7 @@ func run() int {
 	if *routePrefix != "/" {
 		*routePrefix = *routePrefix + "/"
 	}
-	level.Debug(logger).Log("routePrefix", *routePrefix)
+	logger.Debug(*routePrefix)
 
 	hup := make(chan os.Signal, 1)
 	reloadCh := make(chan chan error)
@@ -136,16 +135,16 @@ func run() int {
 			select {
 			case <-hup:
 				if err := sc.ReloadConfig(*configFile, logger); err != nil {
-					level.Error(logger).Log("msg", "Error reloading config", "err", err)
+					logger.Error("Error reloading config", "err", err)
 					continue
 				}
-				level.Info(logger).Log("msg", "Reloaded config file")
+				logger.Info("Reloaded config file")
 			case rc := <-reloadCh:
 				if err := sc.ReloadConfig(*configFile, logger); err != nil {
-					level.Error(logger).Log("msg", "Error reloading config", "err", err)
+					logger.Error("Error reloading config", "err", err)
 					rc <- err
 				} else {
-					level.Info(logger).Log("msg", "Reloaded config file")
+					logger.Info("Reloaded config file")
 					rc <- nil
 				}
 			}
@@ -187,7 +186,7 @@ func run() int {
 		sc.Lock()
 		conf := sc.C
 		sc.Unlock()
-		prober.Handler(w, r, conf, logger, rh, *timeoutOffset, nil, moduleUnknownCounter, logLevelProber)
+		prober.Handler(w, r, conf, logger, rh, *timeoutOffset, nil, moduleUnknownCounter, allowedLevel)
 	})
 	http.HandleFunc(*routePrefix, func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "text/html")
@@ -256,7 +255,7 @@ func run() int {
 		c, err := yaml.Marshal(sc.C)
 		sc.RUnlock()
 		if err != nil {
-			level.Warn(logger).Log("msg", "Error marshalling configuration", "err", err)
+			logger.Warn("Error marshalling configuration", "err", err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
@@ -271,15 +270,15 @@ func run() int {
 
 	go func() {
 		if err := web.ListenAndServe(srv, toolkitFlags, logger); err != nil {
-			level.Error(logger).Log("msg", "Error starting HTTP server", "err", err)
+			logger.Error("Error starting HTTP server", "err", err)
 			close(srvc)
 		}
 	}()
 
 	for {
 		select {
 		case <-term:
-			level.Info(logger).Log("msg", "Received SIGTERM, exiting gracefully...")
+			logger.Info("Received SIGTERM, exiting gracefully...")
 			return 0
 		case <-srvc:
 			return 1