Switch to slog

Signed-off-by: Luca Comellini <[email protected]>

.circleci/config.yml

@@ -9,7 +9,7 @@ executors:
   # also be updated.
   golang:
     docker:
-      - image: cimg/go:1.21
+      - image: cimg/go:1.23
 
 jobs:
   test:

.golangci.yml

@@ -3,6 +3,7 @@ linters:
   enable:
     - misspell
     - revive
+    - sloglint
 
 issues:
   exclude-rules:
@@ -15,5 +16,3 @@ linters-settings:
     exclude-functions:
       # Used in HTTP handlers, any error is handled by the server itself.
       - (net/http.ResponseWriter).Write
-      # Never check for logger errors.
-      - (github.com/go-kit/log.Logger).Log

.promu.yml

@@ -1,7 +1,7 @@
 go:
     # Whenever the Go version is updated here, .travis.yml and
     # .circle/config.yml should also be updated.
-    version: 1.21
+    version: 1.23
 repository:
     path: github.com/prometheus-community/systemd_exporter
 build:

go.mod

@@ -1,37 +1,36 @@
 module github.com/prometheus-community/systemd_exporter
 
-go 1.19
+go 1.22
 
 require (
 	github.com/alecthomas/kingpin/v2 v2.4.0
 	github.com/coreos/go-systemd/v22 v22.5.0
-	github.com/go-kit/log v0.2.1
 	github.com/godbus/dbus/v5 v5.1.0
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.18.0
-	github.com/prometheus/common v0.45.0
-	github.com/prometheus/exporter-toolkit v0.11.0
+	github.com/prometheus/client_golang v1.20.4
+	github.com/prometheus/common v0.59.1
+	github.com/prometheus/exporter-toolkit v0.13.0
 )
 
 require (
 	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	github.com/go-logfmt/logfmt v0.5.1 // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/jpillora/backoff v1.0.0 // indirect
-	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // 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/client_model v0.5.0 // indirect
-	github.com/prometheus/procfs v0.12.0 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/xhit/go-str2duration/v2 v2.1.0 // indirect
-	golang.org/x/crypto v0.16.0 // indirect
-	golang.org/x/net v0.17.0 // indirect
-	golang.org/x/oauth2 v0.12.0 // indirect
-	golang.org/x/sync v0.5.0 // indirect
-	golang.org/x/sys v0.15.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/protobuf v1.31.0 // indirect
+	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/net v0.28.0 // indirect
+	golang.org/x/oauth2 v0.22.0 // indirect
+	golang.org/x/sync v0.8.0 // indirect
+	golang.org/x/sys v0.23.0 // indirect
+	golang.org/x/text v0.17.0 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -4,81 +4,77 @@ github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 h1:s6gZFSlWYmbqAu
 github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137/go.mod h1:OMCwj8VM1Kc9e19TLln2VL61YJF0x1XFtfdL4JdbSyE=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
-github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 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/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/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
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 github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
-github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
-github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
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 github.com/jpillora/backoff v1.0.0 h1:uvFg412JmmHBHw7iwprIxkPMI+sGQ4kzOWsMeHnm2EA=
 github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
-github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 h1:jWpvCLoY8Z/e3VKvlsiIGKtc+UG6U5vzxaoagmhXfyg=
-github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0/go.mod h1:QUyp042oQthUoa9bqDv0ER0wrtXnBruoNd7aNjkbP+k=
+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=
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 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f h1:KUppIJq7/+SVif2QVs3tOP0zanoHgBEVAwHxUSIzRqU=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 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 v1.18.0 h1:HzFfmkOzH5Q8L8G+kSJKUx5dtG87sewO+FoDDqP5Tbk=
-github.com/prometheus/client_golang v1.18.0/go.mod h1:T+GXkCk5wSJyOqMIzVgvvjFDlkOQntgjkJWKrN5txjA=
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+golang.org/x/sys v0.23.0 h1:YfKFowiIMvtgl1UERQoTPPToxltDeZfbj4H7dVUCwmM=
+golang.org/x/sys v0.23.0/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=
+google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -19,14 +19,14 @@ import (
 	"os"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus-community/systemd_exporter/systemd"
 	"github.com/prometheus-community/systemd_exporter/systemd/resolved"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors/version"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	"github.com/prometheus/common/promlog"
-	"github.com/prometheus/common/promlog/flag"
-	"github.com/prometheus/common/version"
+	"github.com/prometheus/common/promslog"
+	"github.com/prometheus/common/promslog/flag"
+	commonVersion "github.com/prometheus/common/version"
 	"github.com/prometheus/exporter-toolkit/web"
 	webflag "github.com/prometheus/exporter-toolkit/web/kingpinflag"
 )
@@ -50,15 +50,15 @@ func main() {
 		toolkitFlags = webflag.AddFlags(kingpin.CommandLine, ":9558")
 	)
 
-	promlogConfig := &promlog.Config{}
-	flag.AddFlags(kingpin.CommandLine, promlogConfig)
-	kingpin.Version(version.Print("systemd_exporter"))
+	promslogConfig := &promslog.Config{}
+	flag.AddFlags(kingpin.CommandLine, promslogConfig)
+	kingpin.Version(commonVersion.Print("systemd_exporter"))
 	kingpin.HelpFlag.Short('h')
 	kingpin.Parse()
-	logger := promlog.New(promlogConfig)
+	logger := promslog.New(promslogConfig)
 
-	level.Info(logger).Log("msg", "Starting systemd_exporter", "version", version.Info())
-	level.Info(logger).Log("msg", "Build context", "build_context", version.BuildContext())
+	logger.Info("Starting systemd_exporter", "version", commonVersion.Info())
+	logger.Info("Build context", "build_context", commonVersion.BuildContext())
 
 	exporterMetricsRegistry := prometheus.NewRegistry()
 	r := prometheus.NewRegistry()
@@ -67,12 +67,12 @@ func main() {
 
 	collector, err := systemd.NewCollector(logger)
 	if err != nil {
-		level.Error(logger).Log("msg", "Couldn't create collector", "err", err)
+		logger.Error("Couldn't create collector", "err", err)
 		os.Exit(1)
 	}
 
 	if err := r.Register(collector); err != nil {
-		level.Error(logger).Log("msg", "Couldn't register systemd collector", "err", err)
+		logger.Error("Couldn't register systemd collector", "err", err)
 		os.Exit(1)
 	}
 
@@ -92,12 +92,12 @@ func main() {
 	if *enableResolvedgMetrics {
 		resolvedCollector, err := resolved.NewCollector(logger)
 		if err != nil {
-			level.Error(logger).Log("msg", "Couldn't create resolved collector", "err", err)
+			logger.Error("Couldn't create resolved collector", "err", err)
 			os.Exit(1)
 		}
 
 		if err := r.Register(resolvedCollector); err != nil {
-			level.Error(logger).Log("msg", "Couldn't register resolved collector", "err", err)
+			logger.Error("Couldn't register resolved collector", "err", err)
 			os.Exit(1)
 		}
 	}
@@ -107,7 +107,7 @@ func main() {
 		landingConfig := web.LandingConfig{
 			Name:        "systemd Exporter",
 			Description: "Prometheus Exporter for systemd",
-			Version:     version.Info(),
+			Version:     commonVersion.Info(),
 			Links: []web.LandingLinks{
 				{
 					Address: *metricsPath,
@@ -117,15 +117,15 @@ func main() {
 		}
 		landingPage, err := web.NewLandingPage(landingConfig)
 		if err != nil {
-			level.Error(logger).Log("err", err)
+			logger.Error("Couldn't create landing page", "err", err.Error())
 			os.Exit(1)
 		}
 		http.Handle("/", landingPage)
 	}
 
 	srv := &http.Server{}
 	if err := web.ListenAndServe(srv, toolkitFlags, logger); err != nil {
-		level.Error(logger).Log("err", err)
+		logger.Error("Error starting server", "err", err)
 		os.Exit(1)
 	}
 }

systemd/resolved/resolved.go

@@ -15,9 +15,8 @@ package resolved
 
 import (
 	"context"
+	"log/slog"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/godbus/dbus/v5"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -29,7 +28,7 @@ const (
 
 type Collector struct {
 	ctx    context.Context
-	logger log.Logger
+	logger *slog.Logger
 }
 
 var (
@@ -81,7 +80,7 @@ var (
 )
 
 // NewCollector returns a new Collector exporing resolved statistics
-func NewCollector(logger log.Logger) (*Collector, error) {
+func NewCollector(logger *slog.Logger) (*Collector, error) {
 
 	ctx := context.TODO()
 	return &Collector{
@@ -94,8 +93,8 @@ func NewCollector(logger log.Logger) (*Collector, error) {
 func (c *Collector) Collect(ch chan<- prometheus.Metric) {
 	err := c.collect(ch)
 	if err != nil {
-		level.Error(c.logger).Log("msg", "error collecting resolved metrics",
-			"err", err)
+		c.logger.Error("error collecting resolved metrics",
+			"err", err.Error())
 	}
 }