Update logging

Switch from promlog/go-kit to promslog/slog for logging.
* Update Go build to 1.23.

Signed-off-by: Ben Kochie <superq@gmail.com>

.circleci/config.yml

@@ -7,7 +7,7 @@ executors:
   # should also be updated.
   golang:
     docker:
-      - image: cimg/go:1.22
+      - image: cimg/go:1.23
   arm:
     machine:
       image: ubuntu-2204:current

.promu-cgo.yml

@@ -1,7 +1,7 @@
 go:
     # Whenever the Go version is updated here, .circle/config.yml and
     # .promu.yml should also be updated.
-    version: 1.22
+    version: 1.23
     cgo: true
 repository:
     path: github.com/prometheus/node_exporter

.promu.yml

@@ -1,7 +1,7 @@
 go:
     # Whenever the Go version is updated here, .circle/config.yml and
     # .promu-cgo.yml should also be updated.
-    version: 1.22
+    version: 1.23
 repository:
     path: github.com/prometheus/node_exporter
 build:

collector/arp_linux.go

@@ -19,10 +19,10 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"net"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 	"github.com/jsimonetti/rtnetlink"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
@@ -39,7 +39,7 @@ type arpCollector struct {
 	fs           procfs.FS
 	deviceFilter deviceFilter
 	entries      *prometheus.Desc
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 func init() {
@@ -47,7 +47,7 @@ func init() {
 }
 
 // NewARPCollector returns a new Collector exposing ARP stats.
-func NewARPCollector(logger log.Logger) (Collector, error) {
+func NewARPCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := procfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)

collector/bcache_linux.go

@@ -18,9 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/bcache"
 )
@@ -36,12 +36,12 @@ func init() {
 // A bcacheCollector is a Collector which gathers metrics from Linux bcache.
 type bcacheCollector struct {
 	fs     bcache.FS
-	logger log.Logger
+	logger *slog.Logger
 }
 
 // NewBcacheCollector returns a newly allocated bcacheCollector.
 // It exposes a number of Linux bcache statistics.
-func NewBcacheCollector(logger log.Logger) (Collector, error) {
+func NewBcacheCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := bcache.NewFS(*sysPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open sysfs: %w", err)

collector/bonding_linux.go

@@ -19,18 +19,17 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"strings"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
 type bondingCollector struct {
 	slaves, active typedDesc
-	logger         log.Logger
+	logger         *slog.Logger
 }
 
 func init() {
@@ -39,7 +38,7 @@ func init() {
 
 // NewBondingCollector returns a newly allocated bondingCollector.
 // It exposes the number of configured and active slave of linux bonding interfaces.
-func NewBondingCollector(logger log.Logger) (Collector, error) {
+func NewBondingCollector(logger *slog.Logger) (Collector, error) {
 	return &bondingCollector{
 		slaves: typedDesc{prometheus.NewDesc(
 			prometheus.BuildFQName(namespace, "bonding", "slaves"),
@@ -61,7 +60,7 @@ func (c *bondingCollector) Update(ch chan<- prometheus.Metric) error {
 	bondingStats, err := readBondingStats(statusfile)
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "Not collecting bonding, file does not exist", "file", statusfile)
+			c.logger.Debug("Not collecting bonding, file does not exist", "file", statusfile)
 			return ErrNoData
 		}
 		return err

collector/boot_time_bsd.go

@@ -18,13 +18,13 @@
 package collector
 
 import (
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
+	"log/slog"
 )
 
 type bootTimeCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -32,7 +32,7 @@ func init() {
 }
 
 // newBootTimeCollector returns a new Collector exposing system boot time on BSD systems.
-func newBootTimeCollector(logger log.Logger) (Collector, error) {
+func newBootTimeCollector(logger *slog.Logger) (Collector, error) {
 	return &bootTimeCollector{
 		logger: logger,
 	}, nil

collector/boot_time_solaris.go

@@ -17,21 +17,21 @@
 package collector
 
 import (
-	"github.com/go-kit/log"
 	"github.com/illumos/go-kstat"
 	"github.com/prometheus/client_golang/prometheus"
+	"log/slog"
 )
 
 type bootTimeCollector struct {
 	boottime typedDesc
-	logger   log.Logger
+	logger   *slog.Logger
 }
 
 func init() {
 	registerCollector("boottime", defaultEnabled, newBootTimeCollector)
 }
 
-func newBootTimeCollector(logger log.Logger) (Collector, error) {
+func newBootTimeCollector(logger *slog.Logger) (Collector, error) {
 	return &bootTimeCollector{
 		boottime: typedDesc{
 			prometheus.NewDesc(

collector/btrfs_linux.go

@@ -18,13 +18,12 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"path"
 	"strings"
 	"syscall"
 
 	dennwc "github.com/dennwc/btrfs"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/btrfs"
 )
@@ -32,7 +31,7 @@ import (
 // A btrfsCollector is a Collector which gathers metrics from Btrfs filesystems.
 type btrfsCollector struct {
 	fs     btrfs.FS
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -40,7 +39,7 @@ func init() {
 }
 
 // NewBtrfsCollector returns a new Collector exposing Btrfs statistics.
-func NewBtrfsCollector(logger log.Logger) (Collector, error) {
+func NewBtrfsCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := btrfs.NewFS(*sysPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open sysfs: %w", err)
@@ -62,8 +61,8 @@ func (c *btrfsCollector) Update(ch chan<- prometheus.Metric) error {
 
 	ioctlStatsMap, err := c.getIoctlStats()
 	if err != nil {
-		level.Debug(c.logger).Log(
+		c.logger.Debug(
-			"msg", "Error querying btrfs device stats with ioctl",
+			"Error querying btrfs device stats with ioctl",
 			"err", err)
 		ioctlStatsMap = make(map[string]*btrfsIoctlFsStats)
 	}
@@ -129,8 +128,8 @@ func (c *btrfsCollector) getIoctlStats() (map[string]*btrfsIoctlFsStats, error)
 		if err != nil {
 			// Failed to open this mount point, maybe we didn't have permission
 			// maybe we'll find another mount point for this FS later.
-			level.Debug(c.logger).Log(
+			c.logger.Debug(
-				"msg", "Error inspecting btrfs mountpoint",
+				"Error inspecting btrfs mountpoint",
 				"mountPoint", mountPath,
 				"err", err)
 			continue
@@ -141,8 +140,8 @@ func (c *btrfsCollector) getIoctlStats() (map[string]*btrfsIoctlFsStats, error)
 		if err != nil {
 			// Failed to get the FS info for some reason,
 			// perhaps it'll work with a different mount point
-			level.Debug(c.logger).Log(
+			c.logger.Debug(
-				"msg", "Error querying btrfs filesystem",
+				"Error querying btrfs filesystem",
 				"mountPoint", mountPath,
 				"err", err)
 			continue
@@ -156,8 +155,8 @@ func (c *btrfsCollector) getIoctlStats() (map[string]*btrfsIoctlFsStats, error)
 
 		deviceStats, err := c.getIoctlDeviceStats(fs, &fsInfo)
 		if err != nil {
-			level.Debug(c.logger).Log(
+			c.logger.Debug(
-				"msg", "Error querying btrfs device stats",
+				"Error querying btrfs device stats",
 				"mountPoint", mountPath,
 				"err", err)
 			continue

collector/buddyinfo.go

@@ -18,10 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"strconv"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
@@ -33,7 +32,7 @@ const (
 type buddyinfoCollector struct {
 	fs     procfs.FS
 	desc   *prometheus.Desc
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -41,7 +40,7 @@ func init() {
 }
 
 // NewBuddyinfoCollector returns a new Collector exposing buddyinfo stats.
-func NewBuddyinfoCollector(logger log.Logger) (Collector, error) {
+func NewBuddyinfoCollector(logger *slog.Logger) (Collector, error) {
 	desc := prometheus.NewDesc(
 		prometheus.BuildFQName(namespace, buddyInfoSubsystem, "blocks"),
 		"Count of free blocks according to size.",
@@ -62,7 +61,7 @@ func (c *buddyinfoCollector) Update(ch chan<- prometheus.Metric) error {
 		return fmt.Errorf("couldn't get buddyinfo: %w", err)
 	}
 
-	level.Debug(c.logger).Log("msg", "Set node_buddy", "buddyInfo", buddyInfo)
+	c.logger.Debug("Set node_buddy", "buddyInfo", buddyInfo)
 	for _, entry := range buddyInfo {
 		for size, value := range entry.Sizes {
 			ch <- prometheus.MustNewConstMetric(

collector/cgroups_linux.go

@@ -18,8 +18,8 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
@@ -30,7 +30,7 @@ type cgroupSummaryCollector struct {
 	fs      procfs.FS
 	cgroups *prometheus.Desc
 	enabled *prometheus.Desc
-	logger  log.Logger
+	logger  *slog.Logger
 }
 
 func init() {
@@ -38,7 +38,7 @@ func init() {
 }
 
 // NewCgroupSummaryCollector returns a new Collector exposing a summary of cgroups.
-func NewCgroupSummaryCollector(logger log.Logger) (Collector, error) {
+func NewCgroupSummaryCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := procfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)

collector/collector.go

@@ -17,12 +17,11 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"sync"
 	"time"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -50,14 +49,14 @@ const (
 )
 
 var (
-	factories              = make(map[string]func(logger log.Logger) (Collector, error))
+	factories              = make(map[string]func(logger *slog.Logger) (Collector, error))
 	initiatedCollectorsMtx = sync.Mutex{}
 	initiatedCollectors    = make(map[string]Collector)
 	collectorState         = make(map[string]*bool)
 	forcedCollectors       = map[string]bool{} // collectors which have been explicitly enabled or disabled
 )
 
-func registerCollector(collector string, isDefaultEnabled bool, factory func(logger log.Logger) (Collector, error)) {
+func registerCollector(collector string, isDefaultEnabled bool, factory func(logger *slog.Logger) (Collector, error)) {
 	var helpDefaultState string
 	if isDefaultEnabled {
 		helpDefaultState = "enabled"
@@ -78,7 +77,7 @@ func registerCollector(collector string, isDefaultEnabled bool, factory func(log
 // NodeCollector implements the prometheus.Collector interface.
 type NodeCollector struct {
 	Collectors map[string]Collector
-	logger     log.Logger
+	logger     *slog.Logger
 }
 
 // DisableDefaultCollectors sets the collector state to false for all collectors which
@@ -104,7 +103,7 @@ func collectorFlagAction(collector string) func(ctx *kingpin.ParseContext) error
 }
 
 // NewNodeCollector creates a new NodeCollector.
-func NewNodeCollector(logger log.Logger, filters ...string) (*NodeCollector, error) {
+func NewNodeCollector(logger *slog.Logger, filters ...string) (*NodeCollector, error) {
 	f := make(map[string]bool)
 	for _, filter := range filters {
 		enabled, exist := collectorState[filter]
@@ -126,7 +125,7 @@ func NewNodeCollector(logger log.Logger, filters ...string) (*NodeCollector, err
 		if collector, ok := initiatedCollectors[key]; ok {
 			collectors[key] = collector
 		} else {
-			collector, err := factories[key](log.With(logger, "collector", key))
+			collector, err := factories[key](logger.With("collector", key))
 			if err != nil {
 				return nil, err
 			}
@@ -156,7 +155,7 @@ func (n NodeCollector) Collect(ch chan<- prometheus.Metric) {
 	wg.Wait()
 }
 
-func execute(name string, c Collector, ch chan<- prometheus.Metric, logger log.Logger) {
+func execute(name string, c Collector, ch chan<- prometheus.Metric, logger *slog.Logger) {
 	begin := time.Now()
 	err := c.Update(ch)
 	duration := time.Since(begin)
@@ -164,13 +163,13 @@ func execute(name string, c Collector, ch chan<- prometheus.Metric, logger log.L
 
 	if err != nil {
 		if IsNoDataError(err) {
-			level.Debug(logger).Log("msg", "collector returned no data", "name", name, "duration_seconds", duration.Seconds(), "err", err)
+			logger.Debug("collector returned no data", "name", name, "duration_seconds", duration.Seconds(), "err", err)
 		} else {
-			level.Error(logger).Log("msg", "collector failed", "name", name, "duration_seconds", duration.Seconds(), "err", err)
+			logger.Error("collector failed", "name", name, "duration_seconds", duration.Seconds(), "err", err)
 		}
 		success = 0
 	} else {
-		level.Debug(logger).Log("msg", "collector succeeded", "name", name, "duration_seconds", duration.Seconds())
+		logger.Debug("collector succeeded", "name", name, "duration_seconds", duration.Seconds())
 		success = 1
 	}
 	ch <- prometheus.MustNewConstMetric(scrapeDurationDesc, prometheus.GaugeValue, duration.Seconds(), name)

collector/conntrack_linux.go

@@ -19,10 +19,9 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
@@ -38,7 +37,7 @@ type conntrackCollector struct {
 	drop          *prometheus.Desc
 	earlyDrop     *prometheus.Desc
 	searchRestart *prometheus.Desc
-	logger        log.Logger
+	logger        *slog.Logger
 }
 
 type conntrackStatistics struct {
@@ -57,7 +56,7 @@ func init() {
 }
 
 // NewConntrackCollector returns a new Collector exposing conntrack stats.
-func NewConntrackCollector(logger log.Logger) (Collector, error) {
+func NewConntrackCollector(logger *slog.Logger) (Collector, error) {
 	return &conntrackCollector{
 		current: prometheus.NewDesc(
 			prometheus.BuildFQName(namespace, "", "nf_conntrack_entries"),
@@ -154,7 +153,7 @@ func (c *conntrackCollector) Update(ch chan<- prometheus.Metric) error {
 
 func (c *conntrackCollector) handleErr(err error) error {
 	if errors.Is(err, os.ErrNotExist) {
-		level.Debug(c.logger).Log("msg", "conntrack probably not loaded")
+		c.logger.Debug("conntrack probably not loaded")
 		return ErrNoData
 	}
 	return fmt.Errorf("failed to retrieve conntrack stats: %w", err)

collector/cpu_darwin.go

@@ -23,10 +23,10 @@ import (
 	"bytes"
 	"encoding/binary"
 	"fmt"
+	"log/slog"
 	"strconv"
 	"unsafe"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -53,7 +53,7 @@ const ClocksPerSec = float64(C.CLK_TCK)
 
 type statCollector struct {
 	cpu    *prometheus.Desc
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -61,7 +61,7 @@ func init() {
 }
 
 // NewCPUCollector returns a new Collector exposing CPU stats.
-func NewCPUCollector(logger log.Logger) (Collector, error) {
+func NewCPUCollector(logger *slog.Logger) (Collector, error) {
 	return &statCollector{
 		cpu:    nodeCPUSecondsDesc,
 		logger: logger,

collector/cpu_dragonfly.go

@@ -18,10 +18,10 @@ package collector
 
 import (
 	"errors"
+	"log/slog"
 	"strconv"
 	"unsafe"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -78,7 +78,7 @@ const maxCPUTimesLen = C.MAXCPU * C.CPUSTATES
 
 type statCollector struct {
 	cpu    *prometheus.Desc
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -86,7 +86,7 @@ func init() {
 }
 
 // NewStatCollector returns a new Collector exposing CPU stats.
-func NewStatCollector(logger log.Logger) (Collector, error) {
+func NewStatCollector(logger *slog.Logger) (Collector, error) {
 	return &statCollector{
 		cpu:    nodeCPUSecondsDesc,
 		logger: logger,

collector/cpu_dragonfly_test.go

@@ -17,6 +17,7 @@
 package collector
 
 import (
+	"log/slog"
 	"runtime"
 	"testing"
 )

collector/cpu_freebsd.go

@@ -18,12 +18,11 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"math"
 	"strconv"
 	"unsafe"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
 )
@@ -85,7 +84,7 @@ func getCPUTimes() ([]cputime, error) {
 type statCollector struct {
 	cpu    typedDesc
 	temp   typedDesc
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -93,7 +92,7 @@ func init() {
 }
 
 // NewStatCollector returns a new Collector exposing CPU stats.
-func NewStatCollector(logger log.Logger) (Collector, error) {
+func NewStatCollector(logger *slog.Logger) (Collector, error) {
 	return &statCollector{
 		cpu: typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue},
 		temp: typedDesc{prometheus.NewDesc(
@@ -134,11 +133,11 @@ func (c *statCollector) Update(ch chan<- prometheus.Metric) error {
 		if err != nil {
 			if err == unix.ENOENT {
 				// No temperature information for this CPU
-				level.Debug(c.logger).Log("msg", "no temperature information for CPU", "cpu", cpu)
+				c.logger.Debug("no temperature information for CPU", "cpu", cpu)
 			} else {
 				// Unexpected error
 				ch <- c.temp.mustNewConstMetric(math.NaN(), lcpu)
-				level.Error(c.logger).Log("msg", "failed to query CPU temperature for CPU", "cpu", cpu, "err", err)
+				c.logger.Error("failed to query CPU temperature for CPU", "cpu", cpu, "err", err)
 			}
 			continue
 		}

collector/cpu_linux.go

@@ -18,6 +18,7 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -26,8 +27,6 @@ import (
 	"sync"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 	"github.com/prometheus/procfs/sysfs"
@@ -45,7 +44,7 @@ type cpuCollector struct {
 	cpuCoreThrottle    *prometheus.Desc
 	cpuPackageThrottle *prometheus.Desc
 	cpuIsolated        *prometheus.Desc
-	logger             log.Logger
+	logger             *slog.Logger
 	cpuStats           map[int64]procfs.CPUStat
 	cpuStatsMutex      sync.Mutex
 	isolatedCpus       []uint16
@@ -70,7 +69,7 @@ func init() {
 }
 
 // NewCPUCollector returns a new Collector exposing kernel/system statistics.
-func NewCPUCollector(logger log.Logger) (Collector, error) {
+func NewCPUCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := procfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)
@@ -86,7 +85,7 @@ func NewCPUCollector(logger log.Logger) (Collector, error) {
 		if !os.IsNotExist(err) {
 			return nil, fmt.Errorf("Unable to get isolated cpus: %w", err)
 		}
-		level.Debug(logger).Log("msg", "Could not open isolated file", "error", err)
+		logger.Debug("Could not open isolated file", "error", err)
 	}
 
 	c := &cpuCollector{
@@ -146,7 +145,7 @@ func NewCPUCollector(logger log.Logger) (Collector, error) {
 func (c *cpuCollector) compileIncludeFlags(flagsIncludeFlag, bugsIncludeFlag *string) error {
 	if (*flagsIncludeFlag != "" || *bugsIncludeFlag != "") && !*enableCPUInfo {
 		*enableCPUInfo = true
-		level.Info(c.logger).Log("msg", "--collector.cpu.info has been set to `true` because you set the following flags, like --collector.cpu.info.flags-include and --collector.cpu.info.bugs-include")
+		c.logger.Info("--collector.cpu.info has been set to `true` because you set the following flags, like --collector.cpu.info.flags-include and --collector.cpu.info.bugs-include")
 	}
 
 	var err error
@@ -205,7 +204,7 @@ func (c *cpuCollector) updateInfo(ch chan<- prometheus.Metric) error {
 
 	cpuFreqEnabled, ok := collectorState["cpufreq"]
 	if !ok || cpuFreqEnabled == nil {
-		level.Debug(c.logger).Log("msg", "cpufreq key missing or nil value in collectorState map")
+		c.logger.Debug("cpufreq key missing or nil value in collectorState map")
 	} else if !*cpuFreqEnabled {
 		for _, cpu := range info {
 			ch <- prometheus.MustNewConstMetric(c.cpuFrequencyHz,
@@ -269,12 +268,12 @@ func (c *cpuCollector) updateThermalThrottle(ch chan<- prometheus.Metric) error
 
 		// topology/physical_package_id
 		if physicalPackageID, err = readUintFromFile(filepath.Join(cpu, "topology", "physical_package_id")); err != nil {
-			level.Debug(c.logger).Log("msg", "CPU is missing physical_package_id", "cpu", cpu)
+			c.logger.Debug("CPU is missing physical_package_id", "cpu", cpu)
 			continue
 		}
 		// topology/core_id
 		if coreID, err = readUintFromFile(filepath.Join(cpu, "topology", "core_id")); err != nil {
-			level.Debug(c.logger).Log("msg", "CPU is missing core_id", "cpu", cpu)
+			c.logger.Debug("CPU is missing core_id", "cpu", cpu)
 			continue
 		}
 
@@ -292,7 +291,7 @@ func (c *cpuCollector) updateThermalThrottle(ch chan<- prometheus.Metric) error
 			if coreThrottleCount, err := readUintFromFile(filepath.Join(cpu, "thermal_throttle", "core_throttle_count")); err == nil {
 				packageCoreThrottles[physicalPackageID][coreID] = coreThrottleCount
 			} else {
-				level.Debug(c.logger).Log("msg", "CPU is missing core_throttle_count", "cpu", cpu)
+				c.logger.Debug("CPU is missing core_throttle_count", "cpu", cpu)
 			}
 		}
 
@@ -302,7 +301,7 @@ func (c *cpuCollector) updateThermalThrottle(ch chan<- prometheus.Metric) error
 			if packageThrottleCount, err := readUintFromFile(filepath.Join(cpu, "thermal_throttle", "package_throttle_count")); err == nil {
 				packageThrottles[physicalPackageID] = packageThrottleCount
 			} else {
-				level.Debug(c.logger).Log("msg", "CPU is missing package_throttle_count", "cpu", cpu)
+				c.logger.Debug("CPU is missing package_throttle_count", "cpu", cpu)
 			}
 		}
 	}
@@ -380,68 +379,68 @@ func (c *cpuCollector) updateCPUStats(newStats map[int64]procfs.CPUStat) {
 
 		// If idle jumps backwards by more than X seconds, assume we had a hotplug event and reset the stats for this CPU.
 		if (cpuStats.Idle - n.Idle) >= jumpBackSeconds {
-			level.Debug(c.logger).Log("msg", jumpBackDebugMessage, "cpu", i, "old_value", cpuStats.Idle, "new_value", n.Idle)
+			c.logger.Debug(jumpBackDebugMessage, "cpu", i, "old_value", cpuStats.Idle, "new_value", n.Idle)
 			cpuStats = procfs.CPUStat{}
 		}
 
 		if n.Idle >= cpuStats.Idle {
 			cpuStats.Idle = n.Idle
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU Idle counter jumped backwards", "cpu", i, "old_value", cpuStats.Idle, "new_value", n.Idle)
+			c.logger.Debug("CPU Idle counter jumped backwards", "cpu", i, "old_value", cpuStats.Idle, "new_value", n.Idle)
 		}
 
 		if n.User >= cpuStats.User {
 			cpuStats.User = n.User
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU User counter jumped backwards", "cpu", i, "old_value", cpuStats.User, "new_value", n.User)
+			c.logger.Debug("CPU User counter jumped backwards", "cpu", i, "old_value", cpuStats.User, "new_value", n.User)
 		}
 
 		if n.Nice >= cpuStats.Nice {
 			cpuStats.Nice = n.Nice
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU Nice counter jumped backwards", "cpu", i, "old_value", cpuStats.Nice, "new_value", n.Nice)
+			c.logger.Debug("CPU Nice counter jumped backwards", "cpu", i, "old_value", cpuStats.Nice, "new_value", n.Nice)
 		}
 
 		if n.System >= cpuStats.System {
 			cpuStats.System = n.System
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU System counter jumped backwards", "cpu", i, "old_value", cpuStats.System, "new_value", n.System)
+			c.logger.Debug("CPU System counter jumped backwards", "cpu", i, "old_value", cpuStats.System, "new_value", n.System)
 		}
 
 		if n.Iowait >= cpuStats.Iowait {
 			cpuStats.Iowait = n.Iowait
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU Iowait counter jumped backwards", "cpu", i, "old_value", cpuStats.Iowait, "new_value", n.Iowait)
+			c.logger.Debug("CPU Iowait counter jumped backwards", "cpu", i, "old_value", cpuStats.Iowait, "new_value", n.Iowait)
 		}
 
 		if n.IRQ >= cpuStats.IRQ {
 			cpuStats.IRQ = n.IRQ
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU IRQ counter jumped backwards", "cpu", i, "old_value", cpuStats.IRQ, "new_value", n.IRQ)
+			c.logger.Debug("CPU IRQ counter jumped backwards", "cpu", i, "old_value", cpuStats.IRQ, "new_value", n.IRQ)
 		}
 
 		if n.SoftIRQ >= cpuStats.SoftIRQ {
 			cpuStats.SoftIRQ = n.SoftIRQ
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU SoftIRQ counter jumped backwards", "cpu", i, "old_value", cpuStats.SoftIRQ, "new_value", n.SoftIRQ)
+			c.logger.Debug("CPU SoftIRQ counter jumped backwards", "cpu", i, "old_value", cpuStats.SoftIRQ, "new_value", n.SoftIRQ)
 		}
 
 		if n.Steal >= cpuStats.Steal {
 			cpuStats.Steal = n.Steal
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU Steal counter jumped backwards", "cpu", i, "old_value", cpuStats.Steal, "new_value", n.Steal)
+			c.logger.Debug("CPU Steal counter jumped backwards", "cpu", i, "old_value", cpuStats.Steal, "new_value", n.Steal)
 		}
 
 		if n.Guest >= cpuStats.Guest {
 			cpuStats.Guest = n.Guest
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU Guest counter jumped backwards", "cpu", i, "old_value", cpuStats.Guest, "new_value", n.Guest)
+			c.logger.Debug("CPU Guest counter jumped backwards", "cpu", i, "old_value", cpuStats.Guest, "new_value", n.Guest)
 		}
 
 		if n.GuestNice >= cpuStats.GuestNice {
 			cpuStats.GuestNice = n.GuestNice
 		} else {
-			level.Debug(c.logger).Log("msg", "CPU GuestNice counter jumped backwards", "cpu", i, "old_value", cpuStats.GuestNice, "new_value", n.GuestNice)
+			c.logger.Debug("CPU GuestNice counter jumped backwards", "cpu", i, "old_value", cpuStats.GuestNice, "new_value", n.GuestNice)
 		}
 
 		c.cpuStats[i] = cpuStats

collector/cpu_linux_test.go

@@ -17,10 +17,11 @@
 package collector
 
 import (
+	"io"
+	"log/slog"
 	"reflect"
 	"testing"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/procfs"
 )
 
@@ -35,7 +36,7 @@ func makeTestCPUCollector(s map[int64]procfs.CPUStat) *cpuCollector {
 	dup := make(map[int64]procfs.CPUStat, len(s))
 	copyStats(dup, s)
 	return &cpuCollector{
-		logger:   log.NewNopLogger(),
+		logger:   slog.New(slog.NewTextHandler(io.Discard, nil)),
 		cpuStats: dup,
 	}
 }

collector/cpu_netbsd.go

@@ -18,6 +18,7 @@ package collector
 
 import (
 	"errors"
+	"log/slog"
 	"math"
 	"regexp"
 	"sort"
@@ -25,8 +26,6 @@ import (
 	"strings"
 	"unsafe"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
 
@@ -214,7 +213,7 @@ func getCPUTimes() ([]cputime, error) {
 type statCollector struct {
 	cpu    typedDesc
 	temp   typedDesc
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -222,7 +221,7 @@ func init() {
 }
 
 // NewStatCollector returns a new Collector exposing CPU stats.
-func NewStatCollector(logger log.Logger) (Collector, error) {
+func NewStatCollector(logger *slog.Logger) (Collector, error) {
 	return &statCollector{
 		cpu: typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue},
 		temp: typedDesc{prometheus.NewDesc(
@@ -269,7 +268,7 @@ func (c *statCollector) Update(ch chan<- prometheus.Metric) error {
 		if temp, ok := cpuTemperatures[cpu]; ok {
 			ch <- c.temp.mustNewConstMetric(temp, lcpu)
 		} else {
-			level.Debug(c.logger).Log("msg", "no temperature information for CPU", "cpu", cpu)
+			c.logger.Debug("no temperature information for CPU", "cpu", cpu)
 			ch <- c.temp.mustNewConstMetric(math.NaN(), lcpu)
 		}
 	}

collector/cpu_netbsd_test.go

@@ -17,6 +17,7 @@
 package collector
 
 import (
+	"log/slog"
 	"runtime"
 	"testing"
 )

collector/cpu_openbsd.go

@@ -17,10 +17,10 @@
 package collector
 
 import (
+	"log/slog"
 	"strconv"
 	"unsafe"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
 )
@@ -45,14 +45,14 @@ const (
 
 type cpuCollector struct {
 	cpu    typedDesc
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
 	registerCollector("cpu", defaultEnabled, NewCPUCollector)
 }
 
-func NewCPUCollector(logger log.Logger) (Collector, error) {
+func NewCPUCollector(logger *slog.Logger) (Collector, error) {
 	return &cpuCollector{
 		cpu:    typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue},
 		logger: logger,

collector/cpu_solaris.go

@@ -17,9 +17,9 @@
 package collector
 
 import (
+	"log/slog"
 	"strconv"
 
-	"github.com/go-kit/log"
 	"github.com/illumos/go-kstat"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -29,14 +29,14 @@ import "C"
 
 type cpuCollector struct {
 	cpu    typedDesc
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
 	registerCollector("cpu", defaultEnabled, NewCpuCollector)
 }
 
-func NewCpuCollector(logger log.Logger) (Collector, error) {
+func NewCpuCollector(logger *slog.Logger) (Collector, error) {
 	return &cpuCollector{
 		cpu:    typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue},
 		logger: logger,

collector/cpu_vulnerabilities_linux.go

@@ -15,8 +15,8 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
 )
@@ -40,7 +40,7 @@ func init() {
 	registerCollector(cpuVulerabilitiesCollector, defaultDisabled, NewVulnerabilitySysfsCollector)
 }
 
-func NewVulnerabilitySysfsCollector(logger log.Logger) (Collector, error) {
+func NewVulnerabilitySysfsCollector(logger *slog.Logger) (Collector, error) {
 	return &cpuVulnerabilitiesCollector{}, nil
 }
 

collector/cpufreq_linux.go

@@ -18,15 +18,15 @@ package collector
 
 import (
 	"fmt"
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
+	"log/slog"
 	"strings"
 )
 
 type cpuFreqCollector struct {
 	fs     sysfs.FS
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -34,7 +34,7 @@ func init() {
 }
 
 // NewCPUFreqCollector returns a new Collector exposing kernel/system statistics.
-func NewCPUFreqCollector(logger log.Logger) (Collector, error) {
+func NewCPUFreqCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := sysfs.NewFS(*sysPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open sysfs: %w", err)

collector/cpufreq_solaris.go

@@ -18,9 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"strconv"
 
-	"github.com/go-kit/log"
 	"github.com/illumos/go-kstat"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -29,14 +29,14 @@ import (
 import "C"
 
 type cpuFreqCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
 	registerCollector("cpufreq", defaultEnabled, NewCpuFreqCollector)
 }
 
-func NewCpuFreqCollector(logger log.Logger) (Collector, error) {
+func NewCpuFreqCollector(logger *slog.Logger) (Collector, error) {
 	return &cpuFreqCollector{
 		logger: logger,
 	}, nil

collector/devstat_dragonfly.go

@@ -19,8 +19,8 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -98,7 +98,7 @@ type devstatCollector struct {
 	bytesDesc     *prometheus.Desc
 	transfersDesc *prometheus.Desc
 	blocksDesc    *prometheus.Desc
-	logger        log.Logger
+	logger        *slog.Logger
 }
 
 func init() {
@@ -106,7 +106,7 @@ func init() {
 }
 
 // NewDevstatCollector returns a new Collector exposing Device stats.
-func NewDevstatCollector(logger log.Logger) (Collector, error) {
+func NewDevstatCollector(logger *slog.Logger) (Collector, error) {
 	return &devstatCollector{
 		bytesDesc: prometheus.NewDesc(
 			prometheus.BuildFQName(namespace, devstatSubsystem, "bytes_total"),

collector/devstat_freebsd.go

@@ -19,10 +19,10 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"sync"
 	"unsafe"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -43,7 +43,7 @@ type devstatCollector struct {
 	duration  typedDesc
 	busyTime  typedDesc
 	blocks    typedDesc
-	logger    log.Logger
+	logger    *slog.Logger
 }
 
 func init() {
@@ -51,7 +51,7 @@ func init() {
 }
 
 // NewDevstatCollector returns a new Collector exposing Device stats.
-func NewDevstatCollector(logger log.Logger) (Collector, error) {
+func NewDevstatCollector(logger *slog.Logger) (Collector, error) {
 	return &devstatCollector{
 		devinfo: &C.struct_devinfo{},
 		bytes: typedDesc{prometheus.NewDesc(

collector/diskstats_common.go

@@ -19,10 +19,9 @@ package collector
 
 import (
 	"errors"
+	"log/slog"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -93,10 +92,10 @@ var (
 	)
 )
 
-func newDiskstatsDeviceFilter(logger log.Logger) (deviceFilter, error) {
+func newDiskstatsDeviceFilter(logger *slog.Logger) (deviceFilter, error) {
 	if *oldDiskstatsDeviceExclude != "" {
 		if !diskstatsDeviceExcludeSet {
-			level.Warn(logger).Log("msg", "--collector.diskstats.ignored-devices is DEPRECATED and will be removed in 2.0.0, use --collector.diskstats.device-exclude")
+			logger.Warn("--collector.diskstats.ignored-devices is DEPRECATED and will be removed in 2.0.0, use --collector.diskstats.device-exclude")
 			*diskstatsDeviceExclude = *oldDiskstatsDeviceExclude
 		} else {
 			return deviceFilter{}, errors.New("--collector.diskstats.ignored-devices and --collector.diskstats.device-exclude are mutually exclusive")
@@ -108,11 +107,11 @@ func newDiskstatsDeviceFilter(logger log.Logger) (deviceFilter, error) {
 	}
 
 	if *diskstatsDeviceExclude != "" {
-		level.Info(logger).Log("msg", "Parsed flag --collector.diskstats.device-exclude", "flag", *diskstatsDeviceExclude)
+		logger.Info("Parsed flag --collector.diskstats.device-exclude", "flag", *diskstatsDeviceExclude)
 	}
 
 	if *diskstatsDeviceInclude != "" {
-		level.Info(logger).Log("msg", "Parsed Flag --collector.diskstats.device-include", "flag", *diskstatsDeviceInclude)
+		logger.Info("Parsed Flag --collector.diskstats.device-include", "flag", *diskstatsDeviceInclude)
 	}
 
 	return newDeviceFilter(*diskstatsDeviceExclude, *diskstatsDeviceInclude), nil

collector/diskstats_darwin.go

@@ -18,8 +18,8 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/lufia/iostat"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -35,7 +35,7 @@ type diskstatsCollector struct {
 	descs []typedDescFunc
 
 	deviceFilter deviceFilter
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 func init() {
@@ -43,7 +43,7 @@ func init() {
 }
 
 // NewDiskstatsCollector returns a new Collector exposing disk device stats.
-func NewDiskstatsCollector(logger log.Logger) (Collector, error) {
+func NewDiskstatsCollector(logger *slog.Logger) (Collector, error) {
 	var diskLabelNames = []string{"device"}
 
 	deviceFilter, err := newDiskstatsDeviceFilter(logger)

collector/diskstats_linux.go

@@ -19,12 +19,11 @@ package collector
 import (
 	"bufio"
 	"fmt"
+	"log/slog"
 	"os"
 	"strconv"
 	"strings"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/blockdevice"
 )
@@ -85,7 +84,7 @@ type diskstatsCollector struct {
 	filesystemInfoDesc      typedFactorDesc
 	deviceMapperInfoDesc    typedFactorDesc
 	ataDescs                map[string]typedFactorDesc
-	logger                  log.Logger
+	logger                  *slog.Logger
 	getUdevDeviceProperties func(uint32, uint32) (udevInfo, error)
 }
 
@@ -95,7 +94,7 @@ func init() {
 
 // NewDiskstatsCollector returns a new Collector exposing disk device stats.
 // Docs from https://www.kernel.org/doc/Documentation/iostats.txt
-func NewDiskstatsCollector(logger log.Logger) (Collector, error) {
+func NewDiskstatsCollector(logger *slog.Logger) (Collector, error) {
 	var diskLabelNames = []string{"device"}
 	fs, err := blockdevice.NewFS(*procPath, *sysPath)
 	if err != nil {
@@ -262,7 +261,7 @@ func NewDiskstatsCollector(logger log.Logger) (Collector, error) {
 
 	// Only enable getting device properties from udev if the directory is readable.
 	if stat, err := os.Stat(*udevDataPath); err != nil || !stat.IsDir() {
-		level.Error(logger).Log("msg", "Failed to open directory, disabling udev device properties", "path", *udevDataPath)
+		logger.Error("Failed to open directory, disabling udev device properties", "path", *udevDataPath)
 	} else {
 		collector.getUdevDeviceProperties = getUdevDeviceProperties
 	}
@@ -284,7 +283,7 @@ func (c *diskstatsCollector) Update(ch chan<- prometheus.Metric) error {
 
 		info, err := getUdevDeviceProperties(stats.MajorNumber, stats.MinorNumber)
 		if err != nil {
-			level.Debug(c.logger).Log("msg", "Failed to parse udev info", "err", err)
+			c.logger.Debug("Failed to parse udev info", "err", err)
 		}
 
 		// This is usually the serial printed on the disk label.
@@ -355,14 +354,14 @@ func (c *diskstatsCollector) Update(ch chan<- prometheus.Metric) error {
 			for attr, desc := range c.ataDescs {
 				str, ok := info[attr]
 				if !ok {
-					level.Debug(c.logger).Log("msg", "Udev attribute does not exist", "attribute", attr)
+					c.logger.Debug("Udev attribute does not exist", "attribute", attr)
 					continue
 				}
 
 				if value, err := strconv.ParseFloat(str, 64); err == nil {
 					ch <- desc.mustNewConstMetric(value, dev)
 				} else {
-					level.Error(c.logger).Log("msg", "Failed to parse ATA value", "err", err)
+					c.logger.Error("Failed to parse ATA value", "err", err)
 				}
 			}
 		}

collector/diskstats_linux_test.go

@@ -18,11 +18,11 @@ package collector
 
 import (
 	"fmt"
-	"os"
+	"io"
+	"log/slog"
 	"strings"
 	"testing"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/testutil"
 )
@@ -39,7 +39,7 @@ func (c testDiskStatsCollector) Describe(ch chan<- *prometheus.Desc) {
 	prometheus.DescribeByCollect(c, ch)
 }
 
-func NewTestDiskStatsCollector(logger log.Logger) (prometheus.Collector, error) {
+func NewTestDiskStatsCollector(logger *slog.Logger) (prometheus.Collector, error) {
 	dsc, err := NewDiskstatsCollector(logger)
 	if err != nil {
 		return testDiskStatsCollector{}, err
@@ -317,7 +317,7 @@ node_disk_written_bytes_total{device="sr0"} 0
 node_disk_written_bytes_total{device="vda"} 1.0938236928e+11
 `
 
-	logger := log.NewLogfmtLogger(os.Stderr)
+	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
 	collector, err := NewDiskstatsCollector(logger)
 	if err != nil {
 		t.Fatal(err)

collector/diskstats_openbsd.go

@@ -18,9 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"unsafe"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
 )
@@ -41,7 +41,7 @@ type diskstatsCollector struct {
 	time   typedDesc
 
 	deviceFilter deviceFilter
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 func init() {
@@ -49,7 +49,7 @@ func init() {
 }
 
 // NewDiskstatsCollector returns a new Collector exposing disk device stats.
-func NewDiskstatsCollector(logger log.Logger) (Collector, error) {
+func NewDiskstatsCollector(logger *slog.Logger) (Collector, error) {
 	deviceFilter, err := newDiskstatsDeviceFilter(logger)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse device filter flags: %w", err)

collector/diskstats_openbsd_amd64.go

@@ -18,9 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"unsafe"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
 )
@@ -52,7 +52,7 @@ type diskstatsCollector struct {
 	time   typedDesc
 
 	deviceFilter deviceFilter
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 func init() {
@@ -60,7 +60,7 @@ func init() {
 }
 
 // NewDiskstatsCollector returns a new Collector exposing disk device stats.
-func NewDiskstatsCollector(logger log.Logger) (Collector, error) {
+func NewDiskstatsCollector(logger *slog.Logger) (Collector, error) {
 	deviceFilter, err := newDiskstatsDeviceFilter(logger)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse device filter flags: %w", err)

collector/dmi.go

@@ -19,11 +19,10 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"strings"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
 )
@@ -38,7 +37,7 @@ func init() {
 }
 
 // NewDMICollector returns a new Collector exposing DMI information.
-func NewDMICollector(logger log.Logger) (Collector, error) {
+func NewDMICollector(logger *slog.Logger) (Collector, error) {
 	fs, err := sysfs.NewFS(*sysPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open sysfs: %w", err)
@@ -47,7 +46,7 @@ func NewDMICollector(logger log.Logger) (Collector, error) {
 	dmi, err := fs.DMIClass()
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(logger).Log("msg", "Platform does not support Desktop Management Interface (DMI) information", "err", err)
+			logger.Debug("Platform does not support Desktop Management Interface (DMI) information", "err", err)
 			dmi = &sysfs.DMIClass{}
 		} else {
 			return nil, fmt.Errorf("failed to read Desktop Management Interface (DMI) information: %w", err)

collector/drbd_linux.go

@@ -20,12 +20,11 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"strconv"
 	"strings"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -79,14 +78,14 @@ type drbdCollector struct {
 	numerical  map[string]drbdNumericalMetric
 	stringPair map[string]drbdStringPairMetric
 	connected  *prometheus.Desc
-	logger     log.Logger
+	logger     *slog.Logger
 }
 
 func init() {
 	registerCollector("drbd", defaultDisabled, newDRBDCollector)
 }
 
-func newDRBDCollector(logger log.Logger) (Collector, error) {
+func newDRBDCollector(logger *slog.Logger) (Collector, error) {
 	return &drbdCollector{
 		numerical: map[string]drbdNumericalMetric{
 			"ns": newDRBDNumericalMetric(
@@ -191,7 +190,7 @@ func (c *drbdCollector) Update(ch chan<- prometheus.Metric) error {
 	file, err := os.Open(statsFile)
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "stats file does not exist, skipping", "file", statsFile, "err", err)
+			c.logger.Debug("stats file does not exist, skipping", "file", statsFile, "err", err)
 			return ErrNoData
 		}
 
@@ -208,7 +207,7 @@ func (c *drbdCollector) Update(ch chan<- prometheus.Metric) error {
 
 		kv := strings.Split(field, ":")
 		if len(kv) != 2 {
-			level.Debug(c.logger).Log("msg", "skipping invalid key:value pair", "field", field)
+			c.logger.Debug("skipping invalid key:value pair", "field", field)
 			continue
 		}
 
@@ -274,7 +273,7 @@ func (c *drbdCollector) Update(ch chan<- prometheus.Metric) error {
 			continue
 		}
 
-		level.Debug(c.logger).Log("msg", "unhandled key-value pair", "key", kv[0], "value", kv[1])
+		c.logger.Debug("unhandled key-value pair", "key", kv[0], "value", kv[1])
 	}
 
 	return scanner.Err()

collector/drm_linux.go

@@ -18,8 +18,8 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
 )
@@ -30,7 +30,7 @@ const (
 
 type drmCollector struct {
 	fs                    sysfs.FS
-	logger                log.Logger
+	logger                *slog.Logger
 	CardInfo              *prometheus.Desc
 	GPUBusyPercent        *prometheus.Desc
 	MemoryGTTSize         *prometheus.Desc
@@ -46,7 +46,7 @@ func init() {
 }
 
 // NewDrmCollector returns a new Collector exposing /sys/class/drm/card?/device stats.
-func NewDrmCollector(logger log.Logger) (Collector, error) {
+func NewDrmCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := sysfs.NewFS(*sysPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open sysfs: %w", err)

collector/edac_linux.go

@@ -18,10 +18,10 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"path/filepath"
 	"regexp"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -39,7 +39,7 @@ type edacCollector struct {
 	ueCount      *prometheus.Desc
 	csRowCECount *prometheus.Desc
 	csRowUECount *prometheus.Desc
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 func init() {
@@ -47,7 +47,7 @@ func init() {
 }
 
 // NewEdacCollector returns a new Collector exposing edac stats.
-func NewEdacCollector(logger log.Logger) (Collector, error) {
+func NewEdacCollector(logger *slog.Logger) (Collector, error) {
 	return &edacCollector{
 		ceCount: prometheus.NewDesc(
 			prometheus.BuildFQName(namespace, edacSubsystem, "correctable_errors_total"),

collector/entropy_linux.go

@@ -18,8 +18,8 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
@@ -28,7 +28,7 @@ type entropyCollector struct {
 	fs              procfs.FS
 	entropyAvail    *prometheus.Desc
 	entropyPoolSize *prometheus.Desc
-	logger          log.Logger
+	logger          *slog.Logger
 }
 
 func init() {
@@ -36,7 +36,7 @@ func init() {
 }
 
 // NewEntropyCollector returns a new Collector exposing entropy stats.
-func NewEntropyCollector(logger log.Logger) (Collector, error) {
+func NewEntropyCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := procfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)

collector/ethtool_linux.go

@@ -23,6 +23,7 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"regexp"
 	"sort"
@@ -31,8 +32,6 @@ import (
 	"syscall"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
 	"github.com/safchain/ethtool"
@@ -79,13 +78,13 @@ type ethtoolCollector struct {
 	deviceFilter   deviceFilter
 	infoDesc       *prometheus.Desc
 	metricsPattern *regexp.Regexp
-	logger         log.Logger
+	logger         *slog.Logger
 }
 
 // makeEthtoolCollector is the internal constructor for EthtoolCollector.
 // This allows NewEthtoolTestCollector to override its .ethtool interface
 // for testing.
-func makeEthtoolCollector(logger log.Logger) (*ethtoolCollector, error) {
+func makeEthtoolCollector(logger *slog.Logger) (*ethtoolCollector, error) {
 	fs, err := sysfs.NewFS(*sysPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open sysfs: %w", err)
@@ -97,13 +96,13 @@ func makeEthtoolCollector(logger log.Logger) (*ethtoolCollector, error) {
 	}
 
 	if *ethtoolDeviceInclude != "" {
-		level.Info(logger).Log("msg", "Parsed flag --collector.ethtool.device-include", "flag", *ethtoolDeviceInclude)
+		logger.Info("Parsed flag --collector.ethtool.device-include", "flag", *ethtoolDeviceInclude)
 	}
 	if *ethtoolDeviceExclude != "" {
-		level.Info(logger).Log("msg", "Parsed flag --collector.ethtool.device-exclude", "flag", *ethtoolDeviceExclude)
+		logger.Info("Parsed flag --collector.ethtool.device-exclude", "flag", *ethtoolDeviceExclude)
 	}
 	if *ethtoolIncludedMetrics != "" {
-		level.Info(logger).Log("msg", "Parsed flag --collector.ethtool.metrics-include", "flag", *ethtoolIncludedMetrics)
+		logger.Info("Parsed flag --collector.ethtool.metrics-include", "flag", *ethtoolIncludedMetrics)
 	}
 
 	// Pre-populate some common ethtool metrics.
@@ -223,7 +222,7 @@ func buildEthtoolFQName(metric string) string {
 }
 
 // NewEthtoolCollector returns a new Collector exposing ethtool stats.
-func NewEthtoolCollector(logger log.Logger) (Collector, error) {
+func NewEthtoolCollector(logger *slog.Logger) (Collector, error) {
 	return makeEthtoolCollector(logger)
 }
 
@@ -376,7 +375,7 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
 	netClass, err := c.fs.NetClass()
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) || errors.Is(err, os.ErrPermission) {
-			level.Debug(c.logger).Log("msg", "Could not read netclass file", "err", err)
+			c.logger.Debug("Could not read netclass file", "err", err)
 			return ErrNoData
 		}
 		return fmt.Errorf("could not get net class info: %w", err)
@@ -405,12 +404,12 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
 		} else {
 			if errno, ok := err.(syscall.Errno); ok {
 				if err == unix.EOPNOTSUPP {
-					level.Debug(c.logger).Log("msg", "ethtool link info error", "err", err, "device", device, "errno", uint(errno))
+					c.logger.Debug("ethtool link info error", "err", err, "device", device, "errno", uint(errno))
 				} else if errno != 0 {
-					level.Error(c.logger).Log("msg", "ethtool link info error", "err", err, "device", device, "errno", uint(errno))
+					c.logger.Error("ethtool link info error", "err", err, "device", device, "errno", uint(errno))
 				}
 			} else {
-				level.Error(c.logger).Log("msg", "ethtool link info error", "err", err, "device", device)
+				c.logger.Error("ethtool link info error", "err", err, "device", device)
 			}
 		}
 
@@ -422,12 +421,12 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
 		} else {
 			if errno, ok := err.(syscall.Errno); ok {
 				if err == unix.EOPNOTSUPP {
-					level.Debug(c.logger).Log("msg", "ethtool driver info error", "err", err, "device", device, "errno", uint(errno))
+					c.logger.Debug("ethtool driver info error", "err", err, "device", device, "errno", uint(errno))
 				} else if errno != 0 {
-					level.Error(c.logger).Log("msg", "ethtool driver info error", "err", err, "device", device, "errno", uint(errno))
+					c.logger.Error("ethtool driver info error", "err", err, "device", device, "errno", uint(errno))
 				}
 			} else {
-				level.Error(c.logger).Log("msg", "ethtool driver info error", "err", err, "device", device)
+				c.logger.Error("ethtool driver info error", "err", err, "device", device)
 			}
 		}
 
@@ -438,12 +437,12 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
 		if err != nil {
 			if errno, ok := err.(syscall.Errno); ok {
 				if err == unix.EOPNOTSUPP {
-					level.Debug(c.logger).Log("msg", "ethtool stats error", "err", err, "device", device, "errno", uint(errno))
+					c.logger.Debug("ethtool stats error", "err", err, "device", device, "errno", uint(errno))
 				} else if errno != 0 {
-					level.Error(c.logger).Log("msg", "ethtool stats error", "err", err, "device", device, "errno", uint(errno))
+					c.logger.Error("ethtool stats error", "err", err, "device", device, "errno", uint(errno))
 				}
 			} else {
-				level.Error(c.logger).Log("msg", "ethtool stats error", "err", err, "device", device)
+				c.logger.Error("ethtool stats error", "err", err, "device", device)
 			}
 		}
 
@@ -462,7 +461,7 @@ func (c *ethtoolCollector) Update(ch chan<- prometheus.Metric) error {
 			metricFQName := buildEthtoolFQName(metricName)
 			existingMetric, exists := metricFQNames[metricFQName]
 			if exists {
-				level.Debug(c.logger).Log("msg", "dropping duplicate metric name", "device", device,
+				c.logger.Debug("dropping duplicate metric name", "device", device,
 					"metricFQName", metricFQName, "metric1", existingMetric, "metric2", metricName)
 				// Keep the metricName as "deleted" in the dict in case there are 3 duplicates.
 				metricFQNames[metricFQName] = ""

collector/ethtool_linux_test.go

@@ -19,6 +19,8 @@ package collector
 import (
 	"bufio"
 	"fmt"
+	"io"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -26,7 +28,6 @@ import (
 	"syscall"
 	"testing"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/testutil"
 	"github.com/safchain/ethtool"
@@ -49,7 +50,7 @@ func (c testEthtoolCollector) Describe(ch chan<- *prometheus.Desc) {
 	prometheus.DescribeByCollect(c, ch)
 }
 
-func NewTestEthtoolCollector(logger log.Logger) (prometheus.Collector, error) {
+func NewTestEthtoolCollector(logger *slog.Logger) (prometheus.Collector, error) {
 	dsc, err := NewEthtoolTestCollector(logger)
 	if err != nil {
 		return testEthtoolCollector{}, err
@@ -255,7 +256,7 @@ func (e *EthtoolFixture) LinkInfo(intf string) (ethtool.EthtoolCmd, error) {
 	return res, err
 }
 
-func NewEthtoolTestCollector(logger log.Logger) (Collector, error) {
+func NewEthtoolTestCollector(logger *slog.Logger) (Collector, error) {
 	collector, err := makeEthtoolCollector(logger)
 	if err != nil {
 		return nil, err
@@ -370,7 +371,7 @@ node_network_supported_speed_bytes{device="eth0",duplex="half",mode="10baseT"} 1
 `
 	*sysPath = "fixtures/sys"
 
-	logger := log.NewLogfmtLogger(os.Stderr)
+	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
 	collector, err := NewEthtoolTestCollector(logger)
 	if err != nil {
 		t.Fatal(err)

collector/exec_bsd.go

@@ -18,13 +18,13 @@
 package collector
 
 import (
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
+	"log/slog"
 )
 
 type execCollector struct {
 	sysctls []bsdSysctl
-	logger  log.Logger
+	logger  *slog.Logger
 }
 
 func init() {
@@ -32,7 +32,7 @@ func init() {
 }
 
 // NewExecCollector returns a new Collector exposing system execution statistics.
-func NewExecCollector(logger log.Logger) (Collector, error) {
+func NewExecCollector(logger *slog.Logger) (Collector, error) {
 	// From sys/vm/vm_meter.c:
 	// All are of type CTLTYPE_UINT.
 	//

collector/fibrechannel_linux.go

@@ -18,10 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"os"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/node_exporter/collector/utils"
 	"github.com/prometheus/procfs/sysfs"
@@ -32,7 +31,7 @@ const maxUint64 = ^uint64(0)
 type fibrechannelCollector struct {
 	fs          sysfs.FS
 	metricDescs map[string]*prometheus.Desc
-	logger      log.Logger
+	logger      *slog.Logger
 	subsystem   string
 }
 
@@ -41,7 +40,7 @@ func init() {
 }
 
 // NewFibreChannelCollector returns a new Collector exposing FibreChannel stats.
-func NewFibreChannelCollector(logger log.Logger) (Collector, error) {
+func NewFibreChannelCollector(logger *slog.Logger) (Collector, error) {
 	var i fibrechannelCollector
 	var err error
 
@@ -99,7 +98,7 @@ func (c *fibrechannelCollector) Update(ch chan<- prometheus.Metric) error {
 	hosts, err := c.fs.FibreChannelClass()
 	if err != nil {
 		if os.IsNotExist(err) {
-			level.Debug(c.logger).Log("msg", "fibrechannel statistics not found, skipping")
+			c.logger.Debug("fibrechannel statistics not found, skipping")
 			return ErrNoData
 		}
 		return fmt.Errorf("error obtaining FibreChannel class info: %s", err)

collector/filefd_linux.go

@@ -20,10 +20,10 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"strconv"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -32,7 +32,7 @@ const (
 )
 
 type fileFDStatCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -40,7 +40,7 @@ func init() {
 }
 
 // NewFileFDStatCollector returns a new Collector exposing file-nr stats.
-func NewFileFDStatCollector(logger log.Logger) (Collector, error) {
+func NewFileFDStatCollector(logger *slog.Logger) (Collector, error) {
 	return &fileFDStatCollector{logger}, nil
 }
 

collector/filesystem_bsd.go

@@ -19,9 +19,8 @@ package collector
 
 import (
 	"errors"
+	"log/slog"
 	"unsafe"
-
-	"github.com/go-kit/log/level"
 )
 
 /*
@@ -51,14 +50,14 @@ func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
 	for i := 0; i < int(count); i++ {
 		mountpoint := C.GoString(&mnt[i].f_mntonname[0])
 		if c.excludedMountPointsPattern.MatchString(mountpoint) {
-			level.Debug(c.logger).Log("msg", "Ignoring mount point", "mountpoint", mountpoint)
+			c.logger.Debug("Ignoring mount point", "mountpoint", mountpoint)
 			continue
 		}
 
 		device := C.GoString(&mnt[i].f_mntfromname[0])
 		fstype := C.GoString(&mnt[i].f_fstypename[0])
 		if c.excludedFSTypesPattern.MatchString(fstype) {
-			level.Debug(c.logger).Log("msg", "Ignoring fs type", "type", fstype)
+			c.logger.Debug("Ignoring fs type", "type", fstype)
 			continue
 		}
 

collector/filesystem_common.go

@@ -19,11 +19,10 @@ package collector
 
 import (
 	"errors"
+	"log/slog"
 	"regexp"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -70,7 +69,7 @@ type filesystemCollector struct {
 	filesDesc, filesFreeDesc      *prometheus.Desc
 	roDesc, deviceErrorDesc       *prometheus.Desc
 	mountInfoDesc                 *prometheus.Desc
-	logger                        log.Logger
+	logger                        *slog.Logger
 }
 
 type filesystemLabels struct {
@@ -89,10 +88,10 @@ func init() {
 }
 
 // NewFilesystemCollector returns a new Collector exposing filesystems stats.
-func NewFilesystemCollector(logger log.Logger) (Collector, error) {
+func NewFilesystemCollector(logger *slog.Logger) (Collector, error) {
 	if *oldMountPointsExcluded != "" {
 		if !mountPointsExcludeSet {
-			level.Warn(logger).Log("msg", "--collector.filesystem.ignored-mount-points is DEPRECATED and will be removed in 2.0.0, use --collector.filesystem.mount-points-exclude")
+			logger.Warn("--collector.filesystem.ignored-mount-points is DEPRECATED and will be removed in 2.0.0, use --collector.filesystem.mount-points-exclude")
 			*mountPointsExclude = *oldMountPointsExcluded
 		} else {
 			return nil, errors.New("--collector.filesystem.ignored-mount-points and --collector.filesystem.mount-points-exclude are mutually exclusive")
@@ -101,7 +100,7 @@ func NewFilesystemCollector(logger log.Logger) (Collector, error) {
 
 	if *oldFSTypesExcluded != "" {
 		if !fsTypesExcludeSet {
-			level.Warn(logger).Log("msg", "--collector.filesystem.ignored-fs-types is DEPRECATED and will be removed in 2.0.0, use --collector.filesystem.fs-types-exclude")
+			logger.Warn("--collector.filesystem.ignored-fs-types is DEPRECATED and will be removed in 2.0.0, use --collector.filesystem.fs-types-exclude")
 			*fsTypesExclude = *oldFSTypesExcluded
 		} else {
 			return nil, errors.New("--collector.filesystem.ignored-fs-types and --collector.filesystem.fs-types-exclude are mutually exclusive")
@@ -109,9 +108,9 @@ func NewFilesystemCollector(logger log.Logger) (Collector, error) {
 	}
 
 	subsystem := "filesystem"
-	level.Info(logger).Log("msg", "Parsed flag --collector.filesystem.mount-points-exclude", "flag", *mountPointsExclude)
+	logger.Info("Parsed flag --collector.filesystem.mount-points-exclude", "flag", *mountPointsExclude)
 	mountPointPattern := regexp.MustCompile(*mountPointsExclude)
-	level.Info(logger).Log("msg", "Parsed flag --collector.filesystem.fs-types-exclude", "flag", *fsTypesExclude)
+	logger.Info("Parsed flag --collector.filesystem.fs-types-exclude", "flag", *fsTypesExclude)
 	filesystemsTypesPattern := regexp.MustCompile(*fsTypesExclude)
 
 	sizeDesc := prometheus.NewDesc(

collector/filesystem_freebsd.go

@@ -17,8 +17,8 @@
 package collector
 
 import (
-	"github.com/go-kit/log/level"
 	"golang.org/x/sys/unix"
+	"log/slog"
 )
 
 const (
@@ -41,19 +41,19 @@ func (c *filesystemCollector) GetStats() ([]filesystemStats, error) {
 	for _, fs := range buf {
 		mountpoint := unix.ByteSliceToString(fs.Mntonname[:])
 		if c.excludedMountPointsPattern.MatchString(mountpoint) {
-			level.Debug(c.logger).Log("msg", "Ignoring mount point", "mountpoint", mountpoint)
+			c.logger.Debug("Ignoring mount point", "mountpoint", mountpoint)
 			continue
 		}
 
 		device := unix.ByteSliceToString(fs.Mntfromname[:])
 		fstype := unix.ByteSliceToString(fs.Fstypename[:])
 		if c.excludedFSTypesPattern.MatchString(fstype) {
-			level.Debug(c.logger).Log("msg", "Ignoring fs type", "type", fstype)
+			c.logger.Debug("Ignoring fs type", "type", fstype)
 			continue
 		}
 
 		if (fs.Flags & unix.MNT_IGNORE) != 0 {
-			level.Debug(c.logger).Log("msg", "Ignoring mount flagged as ignore", "mountpoint", mountpoint)
+			c.logger.Debug("Ignoring mount flagged as ignore", "mountpoint", mountpoint)
 			continue
 		}
 

collector/filesystem_linux.go

@@ -21,14 +21,13 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"strings"
 	"sync"
 	"time"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"golang.org/x/sys/unix"
 )
 
@@ -75,11 +74,11 @@ func (c *filesystemCollector) GetStats() ([]filesystemStats, error) {
 	go func() {
 		for _, labels := range mps {
 			if c.excludedMountPointsPattern.MatchString(labels.mountPoint) {
-				level.Debug(c.logger).Log("msg", "Ignoring mount point", "mountpoint", labels.mountPoint)
+				c.logger.Debug("Ignoring mount point", "mountpoint", labels.mountPoint)
 				continue
 			}
 			if c.excludedFSTypesPattern.MatchString(labels.fsType) {
-				level.Debug(c.logger).Log("msg", "Ignoring fs", "type", labels.fsType)
+				c.logger.Debug("Ignoring fs", "type", labels.fsType)
 				continue
 			}
 
@@ -90,7 +89,7 @@ func (c *filesystemCollector) GetStats() ([]filesystemStats, error) {
 					labels:      labels,
 					deviceError: 1,
 				})
-				level.Debug(c.logger).Log("msg", "Mount point is in an unresponsive state", "mountpoint", labels.mountPoint)
+				c.logger.Debug("Mount point is in an unresponsive state", "mountpoint", labels.mountPoint)
 				stuckMountsMtx.Unlock()
 				continue
 			}
@@ -128,14 +127,14 @@ func (c *filesystemCollector) processStat(labels filesystemLabels) filesystemSta
 
 	// If the mount has been marked as stuck, unmark it and log it's recovery.
 	if _, ok := stuckMounts[labels.mountPoint]; ok {
-		level.Debug(c.logger).Log("msg", "Mount point has recovered, monitoring will resume", "mountpoint", labels.mountPoint)
+		c.logger.Debug("Mount point has recovered, monitoring will resume", "mountpoint", labels.mountPoint)
 		delete(stuckMounts, labels.mountPoint)
 	}
 	stuckMountsMtx.Unlock()
 
 	if err != nil {
 		labels.deviceError = err.Error()
-		level.Debug(c.logger).Log("msg", "Error on statfs() system call", "rootfs", rootfsFilePath(labels.mountPoint), "err", err)
+		c.logger.Debug("Error on statfs() system call", "rootfs", rootfsFilePath(labels.mountPoint), "err", err)
 		return filesystemStats{
 			labels:      labels,
 			deviceError: 1,
@@ -157,7 +156,7 @@ func (c *filesystemCollector) processStat(labels filesystemLabels) filesystemSta
 // stuckMountWatcher listens on the given success channel and if the channel closes
 // then the watcher does nothing. If instead the timeout is reached, the
 // mount point that is being watched is marked as stuck.
-func stuckMountWatcher(mountPoint string, success chan struct{}, logger log.Logger) {
+func stuckMountWatcher(mountPoint string, success chan struct{}, logger *slog.Logger) {
 	mountCheckTimer := time.NewTimer(*mountTimeout)
 	defer mountCheckTimer.Stop()
 	select {
@@ -170,18 +169,18 @@ func stuckMountWatcher(mountPoint string, success chan struct{}, logger log.Logg
 		case <-success:
 			// Success came in just after the timeout was reached, don't label the mount as stuck
 		default:
-			level.Debug(logger).Log("msg", "Mount point timed out, it is being labeled as stuck and will not be monitored", "mountpoint", mountPoint)
+			logger.Debug("Mount point timed out, it is being labeled as stuck and will not be monitored", "mountpoint", mountPoint)
 			stuckMounts[mountPoint] = struct{}{}
 		}
 		stuckMountsMtx.Unlock()
 	}
 }
 
-func mountPointDetails(logger log.Logger) ([]filesystemLabels, error) {
+func mountPointDetails(logger *slog.Logger) ([]filesystemLabels, error) {
 	file, err := os.Open(procFilePath("1/mountinfo"))
 	if errors.Is(err, os.ErrNotExist) {
 		// Fallback to `/proc/self/mountinfo` if `/proc/1/mountinfo` is missing due hidepid.
-		level.Debug(logger).Log("msg", "Reading root mounts failed, falling back to self mounts", "err", err)
+		logger.Debug("Reading root mounts failed, falling back to self mounts", "err", err)
 		file, err = os.Open(procFilePath("self/mountinfo"))
 	}
 	if err != nil {

collector/filesystem_linux_test.go

@@ -17,11 +17,12 @@
 package collector
 
 import (
+	"io"
+	"log/slog"
 	"strings"
 	"testing"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 )
 
 func Test_parseFilesystemLabelsError(t *testing.T) {
@@ -82,7 +83,7 @@ func TestMountPointDetails(t *testing.T) {
 		"/var/lib/kubelet/plugins/kubernetes.io/vsphere-volume/mounts/[vsanDatastore]	bafb9e5a-8856-7e6c-699c-801844e77a4a/kubernetes-dynamic-pvc-3eba5bba-48a3-11e8-89ab-005056b92113.vmdk": "",
 	}
 
-	filesystems, err := mountPointDetails(log.NewNopLogger())
+	filesystems, err := mountPointDetails(slog.New(slog.NewTextHandler(io.Discard, nil)))
 	if err != nil {
 		t.Log(err)
 	}
@@ -111,7 +112,7 @@ func TestMountsFallback(t *testing.T) {
 		"/": "",
 	}
 
-	filesystems, err := mountPointDetails(log.NewNopLogger())
+	filesystems, err := mountPointDetails(slog.New(slog.NewTextHandler(io.Discard, nil)))
 	if err != nil {
 		t.Log(err)
 	}
@@ -139,7 +140,7 @@ func TestPathRootfs(t *testing.T) {
 		"/sys/fs/cgroup": "",
 	}
 
-	filesystems, err := mountPointDetails(log.NewNopLogger())
+	filesystems, err := mountPointDetails(slog.New(slog.NewTextHandler(io.Discard, nil)))
 	if err != nil {
 		t.Log(err)
 	}

collector/filesystem_openbsd.go

@@ -17,8 +17,8 @@
 package collector
 
 import (
-	"github.com/go-kit/log/level"
 	"golang.org/x/sys/unix"
+	"log/slog"
 )
 
 const (
@@ -43,14 +43,14 @@ func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
 	for _, v := range mnt {
 		mountpoint := unix.ByteSliceToString(v.F_mntonname[:])
 		if c.excludedMountPointsPattern.MatchString(mountpoint) {
-			level.Debug(c.logger).Log("msg", "Ignoring mount point", "mountpoint", mountpoint)
+			c.logger.Debug("Ignoring mount point", "mountpoint", mountpoint)
 			continue
 		}
 
 		device := unix.ByteSliceToString(v.F_mntfromname[:])
 		fstype := unix.ByteSliceToString(v.F_fstypename[:])
 		if c.excludedFSTypesPattern.MatchString(fstype) {
-			level.Debug(c.logger).Log("msg", "Ignoring fs type", "type", fstype)
+			c.logger.Debug("Ignoring fs type", "type", fstype)
 			continue
 		}
 

collector/hwmon_linux.go

@@ -18,6 +18,7 @@ package collector
 
 import (
 	"errors"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -25,8 +26,6 @@ import (
 	"strings"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
 )
@@ -55,12 +54,12 @@ func init() {
 type hwMonCollector struct {
 	deviceFilter deviceFilter
 	sensorFilter deviceFilter
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 // NewHwMonCollector returns a new Collector exposing /sys/class/hwmon stats
 // (similar to lm-sensors).
-func NewHwMonCollector(logger log.Logger) (Collector, error) {
+func NewHwMonCollector(logger *slog.Logger) (Collector, error) {
 
 	return &hwMonCollector{
 		logger:       logger,
@@ -168,7 +167,7 @@ func (c *hwMonCollector) updateHwmon(ch chan<- prometheus.Metric, dir string) er
 	}
 
 	if c.deviceFilter.ignored(hwmonName) {
-		level.Debug(c.logger).Log("msg", "ignoring hwmon chip", "chip", hwmonName)
+		c.logger.Debug("ignoring hwmon chip", "chip", hwmonName)
 		return nil
 	}
 
@@ -211,7 +210,7 @@ func (c *hwMonCollector) updateHwmon(ch chan<- prometheus.Metric, dir string) er
 		// sensors on specific devices. For example, to exclude the sensor "temp3" on
 		// the device "platform_coretemp_0", use "platform_coretemp_0;temp3"
 		if c.sensorFilter.ignored(hwmonName + ";" + sensor) {
-			level.Debug(c.logger).Log("msg", "ignoring sensor", "sensor", sensor)
+			c.logger.Debug("ignoring sensor", "sensor", sensor)
 			continue
 		}
 
@@ -450,7 +449,7 @@ func (c *hwMonCollector) Update(ch chan<- prometheus.Metric) error {
 	hwmonFiles, err := os.ReadDir(hwmonPathName)
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "hwmon collector metrics are not available for this system")
+			c.logger.Debug("hwmon collector metrics are not available for this system")
 			return ErrNoData
 		}
 

collector/infiniband_linux.go

@@ -19,11 +19,10 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"strconv"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
 )
@@ -31,7 +30,7 @@ import (
 type infinibandCollector struct {
 	fs          sysfs.FS
 	metricDescs map[string]*prometheus.Desc
-	logger      log.Logger
+	logger      *slog.Logger
 	subsystem   string
 }
 
@@ -40,7 +39,7 @@ func init() {
 }
 
 // NewInfiniBandCollector returns a new Collector exposing InfiniBand stats.
-func NewInfiniBandCollector(logger log.Logger) (Collector, error) {
+func NewInfiniBandCollector(logger *slog.Logger) (Collector, error) {
 	var i infinibandCollector
 	var err error
 
@@ -116,7 +115,7 @@ func (c *infinibandCollector) Update(ch chan<- prometheus.Metric) error {
 	devices, err := c.fs.InfiniBandClass()
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "infiniband statistics not found, skipping")
+			c.logger.Debug("infiniband statistics not found, skipping")
 			return ErrNoData
 		}
 		return fmt.Errorf("error obtaining InfiniBand class info: %w", err)

collector/interrupts_common.go

@@ -19,13 +19,13 @@ package collector
 
 import (
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
+	"log/slog"
 )
 
 type interruptsCollector struct {
 	desc         typedDesc
-	logger       log.Logger
+	logger       *slog.Logger
 	nameFilter   deviceFilter
 	includeZeros bool
 }
@@ -41,7 +41,7 @@ var (
 )
 
 // NewInterruptsCollector returns a new Collector exposing interrupts stats.
-func NewInterruptsCollector(logger log.Logger) (Collector, error) {
+func NewInterruptsCollector(logger *slog.Logger) (Collector, error) {
 	return &interruptsCollector{
 		desc: typedDesc{prometheus.NewDesc(
 			namespace+"_interrupts_total",

collector/interrupts_linux.go

@@ -25,7 +25,6 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -42,7 +41,7 @@ func (c *interruptsCollector) Update(ch chan<- prometheus.Metric) (err error) {
 		for cpuNo, value := range interrupt.values {
 			filterName := name + ";" + interrupt.info + ";" + interrupt.devices
 			if c.nameFilter.ignored(filterName) {
-				level.Debug(c.logger).Log("msg", "ignoring interrupt name", "filter_name", filterName)
+				c.logger.Debug("ignoring interrupt name", "filter_name", filterName)
 				continue
 			}
 			fv, err := strconv.ParseFloat(value, 64)
@@ -50,7 +49,7 @@ func (c *interruptsCollector) Update(ch chan<- prometheus.Metric) (err error) {
 				return fmt.Errorf("invalid value %s in interrupts: %w", value, err)
 			}
 			if !c.includeZeros && fv == 0.0 {
-				level.Debug(c.logger).Log("msg", "ignoring interrupt with zero value", "filter_name", filterName, "cpu", cpuNo)
+				c.logger.Debug("ignoring interrupt with zero value", "filter_name", filterName, "cpu", cpuNo)
 				continue
 			}
 			ch <- c.desc.mustNewConstMetric(fv, strconv.Itoa(cpuNo), name, interrupt.info, interrupt.devices)

collector/interrupts_openbsd.go

@@ -18,9 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"strconv"
 
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -110,11 +110,11 @@ func (c *interruptsCollector) Update(ch chan<- prometheus.Metric) error {
 			interruptType := fmt.Sprintf("%d", interrupt.vector)
 			filterName := interruptType + ";" + dev
 			if c.nameFilter.ignored(filterName) {
-				level.Debug(c.logger).Log("msg", "ignoring interrupt name", "filter_name", filterName)
+				c.logger.Debug("ignoring interrupt name", "filter_name", filterName)
 				continue
 			}
 			if !c.includeZeros && value == 0.0 {
-				level.Debug(c.logger).Log("msg", "ignoring interrupt with zero value", "filter_name", filterName, "cpu", cpuNo)
+				c.logger.Debug("ignoring interrupt with zero value", "filter_name", filterName, "cpu", cpuNo)
 				continue
 			}
 			ch <- c.desc.mustNewConstMetric(

collector/interrupts_openbsd_amd64.go

@@ -18,10 +18,10 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"strconv"
 	"unsafe"
 
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
 )
@@ -81,11 +81,11 @@ func (c *interruptsCollector) Update(ch chan<- prometheus.Metric) error {
 			interruptType := fmt.Sprintf("%d", interrupt.vector)
 			filterName := interruptType + ";" + dev
 			if c.nameFilter.ignored(filterName) {
-				level.Debug(c.logger).Log("msg", "ignoring interrupt name", "filter_name", filterName)
+				c.logger.Debug("ignoring interrupt name", "filter_name", filterName)
 				continue
 			}
 			if !c.includeZeros && value == 0.0 {
-				level.Debug(c.logger).Log("msg", "ignoring interrupt with zero value", "filter_name", filterName, "cpu", cpuNo)
+				c.logger.Debug("ignoring interrupt with zero value", "filter_name", filterName, "cpu", cpuNo)
 				continue
 			}
 			ch <- c.desc.mustNewConstMetric(

collector/ipvs_linux.go

@@ -19,14 +19,13 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"sort"
 	"strconv"
 	"strings"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
@@ -37,7 +36,7 @@ type ipvsCollector struct {
 	backendLabels                                                               []string
 	backendConnectionsActive, backendConnectionsInact, backendWeight            typedDesc
 	connections, incomingPackets, outgoingPackets, incomingBytes, outgoingBytes typedDesc
-	logger                                                                      log.Logger
+	logger                                                                      *slog.Logger
 }
 
 type ipvsBackendStatus struct {
@@ -73,11 +72,11 @@ func init() {
 
 // NewIPVSCollector sets up a new collector for IPVS metrics. It accepts the
 // "procfs" config parameter to override the default proc location (/proc).
-func NewIPVSCollector(logger log.Logger) (Collector, error) {
+func NewIPVSCollector(logger *slog.Logger) (Collector, error) {
 	return newIPVSCollector(logger)
 }
 
-func newIPVSCollector(logger log.Logger) (*ipvsCollector, error) {
+func newIPVSCollector(logger *slog.Logger) (*ipvsCollector, error) {
 	var (
 		c         ipvsCollector
 		err       error
@@ -143,7 +142,7 @@ func (c *ipvsCollector) Update(ch chan<- prometheus.Metric) error {
 	if err != nil {
 		// Cannot access ipvs metrics, report no error.
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "ipvs collector metrics are not available for this system")
+			c.logger.Debug("ipvs collector metrics are not available for this system")
 			return ErrNoData
 		}
 		return fmt.Errorf("could not get IPVS stats: %w", err)

collector/ipvs_linux_test.go

@@ -19,14 +19,14 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"io"
+	"log/slog"
 	"net/http"
 	"net/http/httptest"
 	"os"
 	"strings"
 	"testing"
 
-	"github.com/go-kit/log"
-
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -114,7 +114,7 @@ func TestIPVSCollector(t *testing.T) {
 			if _, err := kingpin.CommandLine.Parse(args); err != nil {
 				t.Fatal(err)
 			}
-			collector, err := newIPVSCollector(log.NewNopLogger())
+			collector, err := newIPVSCollector(slog.New(slog.NewTextHandler(io.Discard, nil)))
 			if err != nil {
 				if test.err == nil {
 					t.Fatal(err)
@@ -182,7 +182,7 @@ func TestIPVSCollectorResponse(t *testing.T) {
 			if _, err := kingpin.CommandLine.Parse(args); err != nil {
 				t.Fatal(err)
 			}
-			collector, err := NewIPVSCollector(log.NewNopLogger())
+			collector, err := NewIPVSCollector(slog.New(slog.NewTextHandler(io.Discard, nil)))
 			if err != nil {
 				t.Fatal(err)
 			}

collector/ksmd_linux.go

@@ -18,9 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"path/filepath"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -31,7 +31,7 @@ var (
 
 type ksmdCollector struct {
 	metricDescs map[string]*prometheus.Desc
-	logger      log.Logger
+	logger      *slog.Logger
 }
 
 func init() {
@@ -50,7 +50,7 @@ func getCanonicalMetricName(filename string) string {
 }
 
 // NewKsmdCollector returns a new Collector exposing kernel/system statistics.
-func NewKsmdCollector(logger log.Logger) (Collector, error) {
+func NewKsmdCollector(logger *slog.Logger) (Collector, error) {
 	subsystem := "ksmd"
 	descs := make(map[string]*prometheus.Desc)
 

collector/kvm_bsd.go

@@ -19,6 +19,7 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"sync"
 )
 

collector/lnstat_linux.go

@@ -18,22 +18,22 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"strconv"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
 
 type lnstatCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
 	registerCollector("lnstat", defaultDisabled, NewLnstatCollector)
 }
 
-func NewLnstatCollector(logger log.Logger) (Collector, error) {
+func NewLnstatCollector(logger *slog.Logger) (Collector, error) {
 	return &lnstatCollector{logger}, nil
 }
 

collector/loadavg.go

@@ -19,15 +19,14 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
 type loadavgCollector struct {
 	metric []typedDesc
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -35,7 +34,7 @@ func init() {
 }
 
 // NewLoadavgCollector returns a new Collector exposing load average stats.
-func NewLoadavgCollector(logger log.Logger) (Collector, error) {
+func NewLoadavgCollector(logger *slog.Logger) (Collector, error) {
 	return &loadavgCollector{
 		metric: []typedDesc{
 			{prometheus.NewDesc(namespace+"_load1", "1m load average.", nil, nil), prometheus.GaugeValue},
@@ -52,7 +51,7 @@ func (c *loadavgCollector) Update(ch chan<- prometheus.Metric) error {
 		return fmt.Errorf("couldn't get load: %w", err)
 	}
 	for i, load := range loads {
-		level.Debug(c.logger).Log("msg", "return load", "index", i, "load", load)
+		c.logger.Debug("return load", "index", i, "load", load)
 		ch <- c.metric[i].mustNewConstMetric(load)
 	}
 	return err

collector/loadavg_bsd.go

@@ -18,6 +18,7 @@
 package collector
 
 import (
+	"log/slog"
 	"unsafe"
 
 	"golang.org/x/sys/unix"

collector/loadavg_solaris.go

@@ -18,6 +18,7 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"strconv"
 
 	"github.com/illumos/go-kstat"

collector/logind_linux.go

@@ -18,10 +18,10 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"os"
 	"strconv"
 
-	"github.com/go-kit/log"
 	"github.com/godbus/dbus/v5"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -46,7 +46,7 @@ var (
 )
 
 type logindCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 type logindDbus struct {
@@ -86,7 +86,7 @@ func init() {
 }
 
 // NewLogindCollector returns a new Collector exposing logind statistics.
-func NewLogindCollector(logger log.Logger) (Collector, error) {
+func NewLogindCollector(logger *slog.Logger) (Collector, error) {
 	return &logindCollector{logger}, nil
 }
 

collector/mdadm_linux.go

@@ -19,16 +19,15 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
 
 type mdadmCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -36,7 +35,7 @@ func init() {
 }
 
 // NewMdadmCollector returns a new Collector exposing raid statistics.
-func NewMdadmCollector(logger log.Logger) (Collector, error) {
+func NewMdadmCollector(logger *slog.Logger) (Collector, error) {
 	return &mdadmCollector{logger}, nil
 }
 
@@ -112,7 +111,7 @@ func (c *mdadmCollector) Update(ch chan<- prometheus.Metric) error {
 
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "Not collecting mdstat, file does not exist", "file", *procPath)
+			c.logger.Debug("Not collecting mdstat, file does not exist", "file", *procPath)
 			return ErrNoData
 		}
 
@@ -120,7 +119,7 @@ func (c *mdadmCollector) Update(ch chan<- prometheus.Metric) error {
 	}
 
 	for _, mdStat := range mdStats {
-		level.Debug(c.logger).Log("msg", "collecting metrics for device", "device", mdStat.Name)
+		c.logger.Debug("collecting metrics for device", "device", mdStat.Name)
 
 		stateVals := make(map[string]float64)
 		stateVals[mdStat.ActivityState] = 1

collector/meminfo.go

@@ -21,7 +21,6 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -41,7 +40,7 @@ func (c *meminfoCollector) Update(ch chan<- prometheus.Metric) error {
 	if err != nil {
 		return fmt.Errorf("couldn't get meminfo: %w", err)
 	}
-	level.Debug(c.logger).Log("msg", "Set node_mem", "memInfo", fmt.Sprintf("%v", memInfo))
+	c.logger.Debug("Set node_mem", "memInfo", fmt.Sprintf("%v", memInfo))
 	for k, v := range memInfo {
 		if strings.HasSuffix(k, "_total") {
 			metricType = prometheus.CounterValue

collector/meminfo_darwin.go

@@ -24,18 +24,18 @@ import "C"
 import (
 	"encoding/binary"
 	"fmt"
+	"log/slog"
 	"unsafe"
 
-	"github.com/go-kit/log"
 	"golang.org/x/sys/unix"
 )
 
 type meminfoCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 // NewMeminfoCollector returns a new Collector exposing memory stats.
-func NewMeminfoCollector(logger log.Logger) (Collector, error) {
+func NewMeminfoCollector(logger *slog.Logger) (Collector, error) {
 	return &meminfoCollector{
 		logger: logger,
 	}, nil

collector/meminfo_linux.go

@@ -18,18 +18,18 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/procfs"
 )
 
 type meminfoCollector struct {
 	fs     procfs.FS
-	logger log.Logger
+	logger *slog.Logger
 }
 
 // NewMeminfoCollector returns a new Collector exposing memory stats.
-func NewMeminfoCollector(logger log.Logger) (Collector, error) {
+func NewMeminfoCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := procfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)

collector/meminfo_linux_test.go

@@ -17,15 +17,14 @@
 package collector
 
 import (
-	"os"
+	"io"
+	"log/slog"
 	"testing"
-
-	"github.com/go-kit/log"
 )
 
 func TestMemInfo(t *testing.T) {
 	*procPath = "fixtures/proc"
-	logger := log.NewLogfmtLogger(os.Stderr)
+	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
 
 	collector, err := NewMeminfoCollector(logger)
 	if err != nil {

collector/meminfo_netbsd.go

@@ -17,16 +17,16 @@
 package collector
 
 import (
-	"github.com/go-kit/log"
 	"golang.org/x/sys/unix"
+	"log/slog"
 )
 
 type meminfoCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 // NewMeminfoCollector returns a new Collector exposing memory stats.
-func NewMeminfoCollector(logger log.Logger) (Collector, error) {
+func NewMeminfoCollector(logger *slog.Logger) (Collector, error) {
 	return &meminfoCollector{
 		logger: logger,
 	}, nil

collector/meminfo_numa_linux.go

@@ -20,13 +20,13 @@ import (
 	"bufio"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"regexp"
 	"strconv"
 	"strings"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -45,7 +45,7 @@ type meminfoMetric struct {
 
 type meminfoNumaCollector struct {
 	metricDescs map[string]*prometheus.Desc
-	logger      log.Logger
+	logger      *slog.Logger
 }
 
 func init() {
@@ -53,7 +53,7 @@ func init() {
 }
 
 // NewMeminfoNumaCollector returns a new Collector exposing memory stats.
-func NewMeminfoNumaCollector(logger log.Logger) (Collector, error) {
+func NewMeminfoNumaCollector(logger *slog.Logger) (Collector, error) {
 	return &meminfoNumaCollector{
 		metricDescs: map[string]*prometheus.Desc{},
 		logger:      logger,

collector/meminfo_openbsd.go

@@ -18,8 +18,7 @@ package collector
 
 import (
 	"fmt"
-
+	"log/slog"
-	"github.com/go-kit/log"
 )
 
 /*
@@ -56,11 +55,11 @@ sysctl_bcstats(struct bcachestats *bcstats)
 import "C"
 
 type meminfoCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 // NewMeminfoCollector returns a new Collector exposing memory stats.
-func NewMeminfoCollector(logger log.Logger) (Collector, error) {
+func NewMeminfoCollector(logger *slog.Logger) (Collector, error) {
 	return &meminfoCollector{
 		logger: logger,
 	}, nil

collector/meminfo_openbsd_amd64.go

@@ -17,9 +17,9 @@
 package collector
 
 import (
+	"log/slog"
 	"unsafe"
 
-	"github.com/go-kit/log"
 	"golang.org/x/sys/unix"
 )
 
@@ -51,11 +51,11 @@ type bcachestats struct {
 }
 
 type meminfoCollector struct {
-	logger log.Logger
+	logger *slog.Logger
 }
 
 // NewMeminfoCollector returns a new Collector exposing memory stats.
-func NewMeminfoCollector(logger log.Logger) (Collector, error) {
+func NewMeminfoCollector(logger *slog.Logger) (Collector, error) {
 	return &meminfoCollector{
 		logger: logger,
 	}, nil

collector/memory_bsd.go

@@ -19,8 +19,8 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
 )
@@ -33,7 +33,7 @@ type memoryCollector struct {
 	pageSize uint64
 	sysctls  []bsdSysctl
 	kvm      kvm
-	logger   log.Logger
+	logger   *slog.Logger
 }
 
 func init() {
@@ -41,7 +41,7 @@ func init() {
 }
 
 // NewMemoryCollector returns a new Collector exposing memory stats.
-func NewMemoryCollector(logger log.Logger) (Collector, error) {
+func NewMemoryCollector(logger *slog.Logger) (Collector, error) {
 	tmp32, err := unix.SysctlUint32("vm.stats.vm.v_page_size")
 	if err != nil {
 		return nil, fmt.Errorf("sysctl(vm.stats.vm.v_page_size) failed: %w", err)

collector/mountstats_linux.go

@@ -18,9 +18,8 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
@@ -96,7 +95,7 @@ type mountStatsCollector struct {
 
 	proc procfs.Proc
 
-	logger log.Logger
+	logger *slog.Logger
 }
 
 // used to uniquely identify an NFS mount to prevent duplicates
@@ -111,7 +110,7 @@ func init() {
 }
 
 // NewMountStatsCollector returns a new Collector exposing NFS statistics.
-func NewMountStatsCollector(logger log.Logger) (Collector, error) {
+func NewMountStatsCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := procfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)
@@ -542,7 +541,7 @@ func (c *mountStatsCollector) Update(ch chan<- prometheus.Metric) error {
 			deviceIdentifier := nfsDeviceIdentifier{m.Device, stats.Transport[k].Protocol, mountAddress}
 			i := deviceList[deviceIdentifier]
 			if i {
-				level.Debug(c.logger).Log("msg", "Skipping duplicate device entry", "device", deviceIdentifier)
+				c.logger.Debug("Skipping duplicate device entry", "device", deviceIdentifier)
 				break
 			}
 			deviceList[deviceIdentifier] = true

collector/netclass_linux.go

@@ -19,14 +19,13 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"net"
 	"os"
 	"regexp"
 	"sync"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
 )
@@ -43,7 +42,7 @@ type netClassCollector struct {
 	ignoredDevicesPattern *regexp.Regexp
 	metricDescs           map[string]*prometheus.Desc
 	metricDescsMu         sync.Mutex
-	logger                log.Logger
+	logger                *slog.Logger
 }
 
 func init() {
@@ -51,7 +50,7 @@ func init() {
 }
 
 // NewNetClassCollector returns a new Collector exposing network class stats.
-func NewNetClassCollector(logger log.Logger) (Collector, error) {
+func NewNetClassCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := sysfs.NewFS(*sysPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open sysfs: %w", err)
@@ -77,7 +76,7 @@ func (c *netClassCollector) netClassSysfsUpdate(ch chan<- prometheus.Metric) err
 	netClass, err := c.getNetClassInfo()
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) || errors.Is(err, os.ErrPermission) {
-			level.Debug(c.logger).Log("msg", "Could not read netclass file", "err", err)
+			c.logger.Debug("Could not read netclass file", "err", err)
 			return ErrNoData
 		}
 		return fmt.Errorf("could not get net class info: %w", err)

collector/netclass_rtnl_linux.go

@@ -23,7 +23,6 @@ import (
 	"path/filepath"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log/level"
 	"github.com/jsimonetti/rtnetlink"
 	"github.com/mdlayher/ethtool"
 	"github.com/prometheus/client_golang/prometheus"
@@ -45,7 +44,7 @@ func (c *netClassCollector) netClassRTNLUpdate(ch chan<- prometheus.Metric) erro
 		if !errors.Is(errors.Unwrap(err), fs.ErrNotExist) {
 			return fmt.Errorf("could not get link modes: %w", err)
 		}
-		level.Info(c.logger).Log("msg", "ETHTOOL netlink interface unavailable, duplex and linkspeed are not scraped.")
+		c.logger.Info("ETHTOOL netlink interface unavailable, duplex and linkspeed are not scraped.")
 	} else {
 		for _, lm := range lms {
 			if c.ignoredDevicesPattern.MatchString(lm.Interface.Name) {

collector/netdev_bsd.go

@@ -19,9 +19,7 @@ package collector
 
 import (
 	"errors"
-
+	"log/slog"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 )
 
 /*
@@ -34,7 +32,7 @@ import (
 */
 import "C"
 
-func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
+func getNetDevStats(filter *deviceFilter, logger *slog.Logger) (netDevStats, error) {
 	netDev := netDevStats{}
 
 	var ifap, ifa *C.struct_ifaddrs
@@ -50,7 +48,7 @@ func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error
 
 		dev := C.GoString(ifa.ifa_name)
 		if filter.ignored(dev) {
-			level.Debug(logger).Log("msg", "Ignoring device", "device", dev)
+			logger.Debug("Ignoring device", "device", dev)
 			continue
 		}
 

collector/netdev_common.go

@@ -20,13 +20,12 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"net"
 	"strconv"
 	"sync"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -44,7 +43,7 @@ type netDevCollector struct {
 	deviceFilter     deviceFilter
 	metricDescsMutex sync.Mutex
 	metricDescs      map[string]*prometheus.Desc
-	logger           log.Logger
+	logger           *slog.Logger
 }
 
 type netDevStats map[string]map[string]uint64
@@ -54,10 +53,10 @@ func init() {
 }
 
 // NewNetDevCollector returns a new Collector exposing network device stats.
-func NewNetDevCollector(logger log.Logger) (Collector, error) {
+func NewNetDevCollector(logger *slog.Logger) (Collector, error) {
 	if *oldNetdevDeviceInclude != "" {
 		if *netdevDeviceInclude == "" {
-			level.Warn(logger).Log("msg", "--collector.netdev.device-whitelist is DEPRECATED and will be removed in 2.0.0, use --collector.netdev.device-include")
+			logger.Warn("--collector.netdev.device-whitelist is DEPRECATED and will be removed in 2.0.0, use --collector.netdev.device-include")
 			*netdevDeviceInclude = *oldNetdevDeviceInclude
 		} else {
 			return nil, errors.New("--collector.netdev.device-whitelist and --collector.netdev.device-include are mutually exclusive")
@@ -66,7 +65,7 @@ func NewNetDevCollector(logger log.Logger) (Collector, error) {
 
 	if *oldNetdevDeviceExclude != "" {
 		if *netdevDeviceExclude == "" {
-			level.Warn(logger).Log("msg", "--collector.netdev.device-blacklist is DEPRECATED and will be removed in 2.0.0, use --collector.netdev.device-exclude")
+			logger.Warn("--collector.netdev.device-blacklist is DEPRECATED and will be removed in 2.0.0, use --collector.netdev.device-exclude")
 			*netdevDeviceExclude = *oldNetdevDeviceExclude
 		} else {
 			return nil, errors.New("--collector.netdev.device-blacklist and --collector.netdev.device-exclude are mutually exclusive")
@@ -78,11 +77,11 @@ func NewNetDevCollector(logger log.Logger) (Collector, error) {
 	}
 
 	if *netdevDeviceExclude != "" {
-		level.Info(logger).Log("msg", "Parsed flag --collector.netdev.device-exclude", "flag", *netdevDeviceExclude)
+		logger.Info("Parsed flag --collector.netdev.device-exclude", "flag", *netdevDeviceExclude)
 	}
 
 	if *netdevDeviceInclude != "" {
-		level.Info(logger).Log("msg", "Parsed Flag --collector.netdev.device-include", "flag", *netdevDeviceInclude)
+		logger.Info("Parsed Flag --collector.netdev.device-include", "flag", *netdevDeviceInclude)
 	}
 
 	return &netDevCollector{

collector/netdev_darwin.go

@@ -20,14 +20,13 @@ import (
 	"bytes"
 	"encoding/binary"
 	"fmt"
+	"log/slog"
 	"net"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"golang.org/x/sys/unix"
 )
 
-func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
+func getNetDevStats(filter *deviceFilter, logger *slog.Logger) (netDevStats, error) {
 	netDev := netDevStats{}
 
 	ifs, err := net.Interfaces()
@@ -37,13 +36,13 @@ func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error
 
 	for _, iface := range ifs {
 		if filter.ignored(iface.Name) {
-			level.Debug(logger).Log("msg", "Ignoring device", "device", iface.Name)
+			logger.Debug("Ignoring device", "device", iface.Name)
 			continue
 		}
 
 		ifaceData, err := getIfaceData(iface.Index)
 		if err != nil {
-			level.Debug(logger).Log("msg", "failed to load data for interface", "device", iface.Name, "err", err)
+			logger.Debug("failed to load data for interface", "device", iface.Name, "err", err)
 			continue
 		}
 

collector/netdev_linux.go

@@ -18,10 +18,9 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/jsimonetti/rtnetlink"
 	"github.com/prometheus/procfs"
 )
@@ -30,14 +29,14 @@ var (
 	netDevNetlink = kingpin.Flag("collector.netdev.netlink", "Use netlink to gather stats instead of /proc/net/dev.").Default("true").Bool()
 )
 
-func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
+func getNetDevStats(filter *deviceFilter, logger *slog.Logger) (netDevStats, error) {
 	if *netDevNetlink {
 		return netlinkStats(filter, logger)
 	}
 	return procNetDevStats(filter, logger)
 }
 
-func netlinkStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
+func netlinkStats(filter *deviceFilter, logger *slog.Logger) (netDevStats, error) {
 	conn, err := rtnetlink.Dial(nil)
 	if err != nil {
 		return nil, err
@@ -52,12 +51,12 @@ func netlinkStats(filter *deviceFilter, logger log.Logger) (netDevStats, error)
 	return parseNetlinkStats(links, filter, logger), nil
 }
 
-func parseNetlinkStats(links []rtnetlink.LinkMessage, filter *deviceFilter, logger log.Logger) netDevStats {
+func parseNetlinkStats(links []rtnetlink.LinkMessage, filter *deviceFilter, logger *slog.Logger) netDevStats {
 	metrics := netDevStats{}
 
 	for _, msg := range links {
 		if msg.Attributes == nil {
-			level.Debug(logger).Log("msg", "No netlink attributes, skipping")
+			logger.Debug("No netlink attributes, skipping")
 			continue
 		}
 		name := msg.Attributes.Name
@@ -93,13 +92,13 @@ func parseNetlinkStats(links []rtnetlink.LinkMessage, filter *deviceFilter, logg
 		}
 
 		if filter.ignored(name) {
-			level.Debug(logger).Log("msg", "Ignoring device", "device", name)
+			logger.Debug("Ignoring device", "device", name)
 			continue
 		}
 
 		// Make sure we don't panic when accessing `stats` attributes below.
 		if stats == nil {
-			level.Debug(logger).Log("msg", "No netlink stats, skipping")
+			logger.Debug("No netlink stats, skipping")
 			continue
 		}
 
@@ -141,7 +140,7 @@ func parseNetlinkStats(links []rtnetlink.LinkMessage, filter *deviceFilter, logg
 	return metrics
 }
 
-func procNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
+func procNetDevStats(filter *deviceFilter, logger *slog.Logger) (netDevStats, error) {
 	metrics := netDevStats{}
 
 	fs, err := procfs.NewFS(*procPath)
@@ -158,7 +157,7 @@ func procNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, erro
 		name := stats.Name
 
 		if filter.ignored(name) {
-			level.Debug(logger).Log("msg", "Ignoring device", "device", name)
+			logger.Debug("Ignoring device", "device", name)
 			continue
 		}
 

collector/netdev_linux_test.go

@@ -17,10 +17,10 @@
 package collector
 
 import (
+	"io"
+	"log/slog"
 	"testing"
 
-	"github.com/go-kit/log"
-
 	"github.com/jsimonetti/rtnetlink"
 )
 
@@ -166,7 +166,7 @@ var links = []rtnetlink.LinkMessage{
 func TestNetDevStatsIgnore(t *testing.T) {
 	filter := newDeviceFilter("^veth", "")
 
-	netStats := parseNetlinkStats(links, &filter, log.NewNopLogger())
+	netStats := parseNetlinkStats(links, &filter, slog.New(slog.NewTextHandler(io.Discard, nil)))
 
 	if want, got := uint64(10437182923), netStats["wlan0"]["receive_bytes"]; want != got {
 		t.Errorf("want netstat wlan0 bytes %v, got %v", want, got)
@@ -199,7 +199,7 @@ func TestNetDevStatsIgnore(t *testing.T) {
 
 func TestNetDevStatsAccept(t *testing.T) {
 	filter := newDeviceFilter("", "^💩0$")
-	netStats := parseNetlinkStats(links, &filter, log.NewNopLogger())
+	netStats := parseNetlinkStats(links, &filter, slog.New(slog.NewTextHandler(io.Discard, nil)))
 
 	if want, got := 1, len(netStats); want != got {
 		t.Errorf("want count of devices to be %d, got %d", want, got)
@@ -230,7 +230,7 @@ func TestNetDevLegacyMetricNames(t *testing.T) {
 	}
 
 	filter := newDeviceFilter("", "")
-	netStats := parseNetlinkStats(links, &filter, log.NewNopLogger())
+	netStats := parseNetlinkStats(links, &filter, slog.New(slog.NewTextHandler(io.Discard, nil)))
 
 	for dev, devStats := range netStats {
 		legacy(devStats)
@@ -263,7 +263,7 @@ func TestNetDevLegacyMetricValues(t *testing.T) {
 	}
 
 	filter := newDeviceFilter("", "^enp0s0f0$")
-	netStats := parseNetlinkStats(links, &filter, log.NewNopLogger())
+	netStats := parseNetlinkStats(links, &filter, slog.New(slog.NewTextHandler(io.Discard, nil)))
 	metrics, ok := netStats["enp0s0f0"]
 	if !ok {
 		t.Error("expected stats for interface enp0s0f0")
@@ -285,7 +285,7 @@ func TestNetDevLegacyMetricValues(t *testing.T) {
 
 func TestNetDevMetricValues(t *testing.T) {
 	filter := newDeviceFilter("", "")
-	netStats := parseNetlinkStats(links, &filter, log.NewNopLogger())
+	netStats := parseNetlinkStats(links, &filter, slog.New(slog.NewTextHandler(io.Discard, nil)))
 
 	for _, msg := range links {
 		device := msg.Attributes.Name

collector/netdev_openbsd.go

@@ -18,9 +18,7 @@ package collector
 
 import (
 	"errors"
-
+	"log/slog"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 )
 
 /*
@@ -31,7 +29,7 @@ import (
 */
 import "C"
 
-func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
+func getNetDevStats(filter *deviceFilter, logger *slog.Logger) (netDevStats, error) {
 	netDev := netDevStats{}
 
 	var ifap, ifa *C.struct_ifaddrs
@@ -47,7 +45,7 @@ func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error
 
 		dev := C.GoString(ifa.ifa_name)
 		if filter.ignored(dev) {
-			level.Debug(logger).Log("msg", "Ignoring device", "device", dev)
+			logger.Debug("Ignoring device", "device", dev)
 			continue
 		}
 

collector/netdev_openbsd_amd64.go

@@ -17,14 +17,13 @@
 package collector
 
 import (
-	"github.com/go-kit/log"
+	"log/slog"
-	"github.com/go-kit/log/level"
 
 	"golang.org/x/sys/unix"
 	"unsafe"
 )
 
-func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
+func getNetDevStats(filter *deviceFilter, logger *slog.Logger) (netDevStats, error) {
 	netDev := netDevStats{}
 
 	mib := [6]_C_int{unix.CTL_NET, unix.AF_ROUTE, 0, 0, unix.NET_RT_IFLIST, 0}
@@ -54,7 +53,7 @@ func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error
 		data := ifm.Data
 		dev := int8ToString(dl.Data[:dl.Nlen])
 		if filter.ignored(dev) {
-			level.Debug(logger).Log("msg", "Ignoring device", "device", dev)
+			logger.Debug("Ignoring device", "device", dev)
 			continue
 		}
 

collector/netisr_freebsd.go

@@ -18,14 +18,14 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
 type netisrCollector struct {
 	sysctls []bsdSysctl
-	logger  log.Logger
+	logger  *slog.Logger
 }
 
 const (
@@ -36,7 +36,7 @@ func init() {
 	registerCollector("netisr", defaultEnabled, NewNetisrCollector)
 }
 
-func NewNetisrCollector(logger log.Logger) (Collector, error) {
+func NewNetisrCollector(logger *slog.Logger) (Collector, error) {
 	return &netisrCollector{
 		sysctls: []bsdSysctl{
 			{

collector/netstat_linux.go

@@ -21,13 +21,13 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"regexp"
 	"strconv"
 	"strings"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -41,7 +41,7 @@ var (
 
 type netStatCollector struct {
 	fieldPattern *regexp.Regexp
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 func init() {
@@ -50,7 +50,7 @@ func init() {
 
 // NewNetStatCollector takes and returns
 // a new Collector exposing network stats.
-func NewNetStatCollector(logger log.Logger) (Collector, error) {
+func NewNetStatCollector(logger *slog.Logger) (Collector, error) {
 	pattern := regexp.MustCompile(*netStatFields)
 	return &netStatCollector{
 		fieldPattern: pattern,

collector/network_route_linux.go

@@ -19,10 +19,10 @@ package collector
 import (
 	"fmt"
 	"golang.org/x/sys/unix"
+	"log/slog"
 	"net"
 	"strconv"
 
-	"github.com/go-kit/log"
 	"github.com/jsimonetti/rtnetlink"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -30,7 +30,7 @@ import (
 type networkRouteCollector struct {
 	routeInfoDesc *prometheus.Desc
 	routesDesc    *prometheus.Desc
-	logger        log.Logger
+	logger        *slog.Logger
 }
 
 func init() {
@@ -38,7 +38,7 @@ func init() {
 }
 
 // NewNetworkRouteCollector returns a new Collector exposing systemd statistics.
-func NewNetworkRouteCollector(logger log.Logger) (Collector, error) {
+func NewNetworkRouteCollector(logger *slog.Logger) (Collector, error) {
 	const subsystem = "network"
 
 	routeInfoDesc := prometheus.NewDesc(

collector/nfs_linux.go

@@ -19,11 +19,10 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"reflect"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/nfs"
 )
@@ -40,7 +39,7 @@ type nfsCollector struct {
 	nfsRPCRetransmissionsDesc         *prometheus.Desc
 	nfsRPCAuthenticationRefreshesDesc *prometheus.Desc
 	nfsProceduresDesc                 *prometheus.Desc
-	logger                            log.Logger
+	logger                            *slog.Logger
 }
 
 func init() {
@@ -48,7 +47,7 @@ func init() {
 }
 
 // NewNfsCollector returns a new Collector exposing NFS statistics.
-func NewNfsCollector(logger log.Logger) (Collector, error) {
+func NewNfsCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := nfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)
@@ -100,7 +99,7 @@ func (c *nfsCollector) Update(ch chan<- prometheus.Metric) error {
 	stats, err := c.fs.ClientRPCStats()
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "Not collecting NFS metrics", "err", err)
+			c.logger.Debug("Not collecting NFS metrics", "err", err)
 			return ErrNoData
 		}
 		return fmt.Errorf("failed to retrieve nfs stats: %w", err)

collector/nfsd_linux.go

@@ -19,10 +19,9 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/nfs"
 )
@@ -32,7 +31,7 @@ import (
 type nfsdCollector struct {
 	fs           nfs.FS
 	requestsDesc *prometheus.Desc
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 func init() {
@@ -44,7 +43,7 @@ const (
 )
 
 // NewNFSdCollector returns a new Collector exposing /proc/net/rpc/nfsd statistics.
-func NewNFSdCollector(logger log.Logger) (Collector, error) {
+func NewNFSdCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := nfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)
@@ -66,7 +65,7 @@ func (c *nfsdCollector) Update(ch chan<- prometheus.Metric) error {
 	stats, err := c.fs.ServerRPCStats()
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "Not collecting NFSd metrics", "err", err)
+			c.logger.Debug("Not collecting NFSd metrics", "err", err)
 			return ErrNoData
 		}
 		return fmt.Errorf("failed to retrieve nfsd stats: %w", err)

collector/ntp.go

@@ -18,14 +18,13 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"net"
 	"sync"
 	"time"
 
 	"github.com/alecthomas/kingpin/v2"
 	"github.com/beevik/ntp"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -51,7 +50,7 @@ var (
 
 type ntpCollector struct {
 	stratum, leap, rtt, offset, reftime, rootDelay, rootDispersion, sanity typedDesc
-	logger                                                                 log.Logger
+	logger                                                                 *slog.Logger
 }
 
 func init() {
@@ -62,7 +61,7 @@ func init() {
 // Default definition of "local" is:
 // - collector.ntp.server address is a loopback address (or collector.ntp.server-is-mine flag is turned on)
 // - the server is reachable with outgoin IP_TTL = 1
-func NewNtpCollector(logger log.Logger) (Collector, error) {
+func NewNtpCollector(logger *slog.Logger) (Collector, error) {
 	ipaddr := net.ParseIP(*ntpServer)
 	if !*ntpServerIsLocal && (ipaddr == nil || !ipaddr.IsLoopback()) {
 		return nil, fmt.Errorf("only IP address of local NTP server is valid for --collector.ntp.server")
@@ -80,7 +79,7 @@ func NewNtpCollector(logger log.Logger) (Collector, error) {
 		return nil, fmt.Errorf("invalid NTP port number %d; must be between 1 and 65535 inclusive", *ntpServerPort)
 	}
 
-	level.Warn(logger).Log("msg", "This collector is deprecated and will be removed in the next major version release.")
+	logger.Warn("This collector is deprecated and will be removed in the next major version release.")
 	return &ntpCollector{
 		stratum: typedDesc{prometheus.NewDesc(
 			prometheus.BuildFQName(namespace, ntpSubsystem, "stratum"),

collector/nvme_linux.go

@@ -19,17 +19,16 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs/sysfs"
 )
 
 type nvmeCollector struct {
 	fs     sysfs.FS
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -37,7 +36,7 @@ func init() {
 }
 
 // NewNVMeCollector returns a new Collector exposing NVMe stats.
-func NewNVMeCollector(logger log.Logger) (Collector, error) {
+func NewNVMeCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := sysfs.NewFS(*sysPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open sysfs: %w", err)
@@ -53,7 +52,7 @@ func (c *nvmeCollector) Update(ch chan<- prometheus.Metric) error {
 	devices, err := c.fs.NVMeClass()
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
-			level.Debug(c.logger).Log("msg", "nvme statistics not found, skipping")
+			c.logger.Debug("nvme statistics not found, skipping")
 			return ErrNoData
 		}
 		return fmt.Errorf("error obtaining NVMe class info: %w", err)

collector/os_release.go

@@ -17,6 +17,7 @@ import (
 	"encoding/xml"
 	"errors"
 	"io"
+	"log/slog"
 	"os"
 	"regexp"
 	"strconv"
@@ -24,8 +25,6 @@ import (
 	"sync"
 	"time"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	envparse "github.com/hashicorp/go-envparse"
 	"github.com/prometheus/client_golang/prometheus"
 )
@@ -58,7 +57,7 @@ type osRelease struct {
 
 type osReleaseCollector struct {
 	infoDesc           *prometheus.Desc
-	logger             log.Logger
+	logger             *slog.Logger
 	os                 *osRelease
 	osMutex            sync.RWMutex
 	osReleaseFilenames []string // all os-release file names to check
@@ -82,7 +81,7 @@ func init() {
 }
 
 // NewOSCollector returns a new Collector exposing os-release information.
-func NewOSCollector(logger log.Logger) (Collector, error) {
+func NewOSCollector(logger *slog.Logger) (Collector, error) {
 	return &osReleaseCollector{
 		logger: logger,
 		infoDesc: prometheus.NewDesc(
@@ -178,7 +177,7 @@ func (c *osReleaseCollector) Update(ch chan<- prometheus.Metric) error {
 		}
 		if errors.Is(err, os.ErrNotExist) {
 			if i >= (len(c.osReleaseFilenames) - 1) {
-				level.Debug(c.logger).Log("msg", "no os-release file found", "files", strings.Join(c.osReleaseFilenames, ","))
+				c.logger.Debug("no os-release file found", "files", strings.Join(c.osReleaseFilenames, ","))
 				return ErrNoData
 			}
 			continue

collector/os_release_test.go

@@ -14,12 +14,12 @@
 package collector
 
 import (
+	"io"
+	"log/slog"
 	"os"
 	"reflect"
 	"strings"
 	"testing"
-
-	"github.com/go-kit/log"
 )
 
 const debianBullseye string = `PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
@@ -129,7 +129,7 @@ func TestUpdateStruct(t *testing.T) {
 	}
 	wantedVersion := 20.04
 
-	collector, err := NewOSCollector(log.NewNopLogger())
+	collector, err := NewOSCollector(slog.New(slog.NewTextHandler(io.Discard, nil)))
 	if err != nil {
 		t.Fatal(err)
 	}

collector/perf_linux.go

@@ -18,13 +18,12 @@ package collector
 
 import (
 	"fmt"
+	"log/slog"
 	"runtime"
 	"strconv"
 	"strings"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/hodgesds/perf-utils"
 	"github.com/prometheus/client_golang/prometheus"
 	"golang.org/x/sys/unix"
@@ -189,7 +188,7 @@ type perfCollector struct {
 	perfSwProfilers     map[int]*perf.SoftwareProfiler
 	perfCacheProfilers  map[int]*perf.CacheProfiler
 	desc                map[string]*prometheus.Desc
-	logger              log.Logger
+	logger              *slog.Logger
 	tracepointCollector *perfTracepointCollector
 }
 
@@ -199,7 +198,7 @@ type perfTracepointCollector struct {
 	// collection order is the sorted configured collection order of the profiler.
 	collectionOrder []string
 
-	logger    log.Logger
+	logger    *slog.Logger
 	profilers map[int]perf.GroupProfiler
 }
 
@@ -218,7 +217,7 @@ func (c *perfTracepointCollector) updateCPU(cpu int, ch chan<- prometheus.Metric
 	profiler := c.profilers[cpu]
 	p := &perf.GroupProfileValue{}
 	if err := profiler.Profile(p); err != nil {
-		level.Error(c.logger).Log("msg", "Failed to collect tracepoint profile", "err", err)
+		c.logger.Error("Failed to collect tracepoint profile", "err", err)
 		return err
 	}
 
@@ -240,7 +239,7 @@ func (c *perfTracepointCollector) updateCPU(cpu int, ch chan<- prometheus.Metric
 
 // newPerfTracepointCollector returns a configured perfTracepointCollector.
 func newPerfTracepointCollector(
-	logger log.Logger,
+	logger *slog.Logger,
 	tracepointsFlag []string,
 	cpus []int,
 ) (*perfTracepointCollector, error) {
@@ -301,7 +300,7 @@ func newPerfTracepointCollector(
 
 // NewPerfCollector returns a new perf based collector, it creates a profiler
 // per CPU.
-func NewPerfCollector(logger log.Logger) (Collector, error) {
+func NewPerfCollector(logger *slog.Logger) (Collector, error) {
 	collector := &perfCollector{
 		perfHwProfilers:     map[int]*perf.HardwareProfiler{},
 		perfSwProfilers:     map[int]*perf.SoftwareProfiler{},

collector/perf_linux_test.go

@@ -17,13 +17,14 @@
 package collector
 
 import (
+	"io"
+	"log/slog"
 	"os"
 	"runtime"
 	"strconv"
 	"strings"
 	"testing"
 
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -44,7 +45,7 @@ func canTestPerf(t *testing.T) {
 
 func TestPerfCollector(t *testing.T) {
 	canTestPerf(t)
-	collector, err := NewPerfCollector(log.NewNopLogger())
+	collector, err := NewPerfCollector(slog.New(slog.NewTextHandler(io.Discard, nil)))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -97,7 +98,7 @@ func TestPerfCollectorStride(t *testing.T) {
 				}
 			}
 			perfCPUsFlag = &test.flag
-			collector, err := NewPerfCollector(log.NewNopLogger())
+			collector, err := NewPerfCollector(slog.New(slog.NewTextHandler(io.Discard, nil)))
 			if err != nil {
 				t.Fatal(err)
 			}

collector/powersupplyclass.go

@@ -18,10 +18,10 @@
 package collector
 
 import (
+	"log/slog"
 	"regexp"
 
 	"github.com/alecthomas/kingpin/v2"
-	"github.com/go-kit/log"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
@@ -33,14 +33,14 @@ type powerSupplyClassCollector struct {
 	subsystem      string
 	ignoredPattern *regexp.Regexp
 	metricDescs    map[string]*prometheus.Desc
-	logger         log.Logger
+	logger         *slog.Logger
 }
 
 func init() {
 	registerCollector("powersupplyclass", defaultEnabled, NewPowerSupplyClassCollector)
 }
 
-func NewPowerSupplyClassCollector(logger log.Logger) (Collector, error) {
+func NewPowerSupplyClassCollector(logger *slog.Logger) (Collector, error) {
 	pattern := regexp.MustCompile(*powerSupplyClassIgnoredPowerSupplies)
 	return &powerSupplyClassCollector{
 		subsystem:      "power_supply",

collector/powersupplyclass_darwin.go

@@ -183,6 +183,7 @@ import "C"
 
 import (
 	"fmt"
+	"log/slog"
 	"strconv"
 
 	"github.com/prometheus/client_golang/prometheus"

collector/pressure_linux.go

@@ -19,11 +19,10 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"syscall"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
@@ -42,7 +41,7 @@ type pressureStatsCollector struct {
 
 	fs procfs.FS
 
-	logger log.Logger
+	logger *slog.Logger
 }
 
 func init() {
@@ -50,7 +49,7 @@ func init() {
 }
 
 // NewPressureStatsCollector returns a Collector exposing pressure stall information
-func NewPressureStatsCollector(logger log.Logger) (Collector, error) {
+func NewPressureStatsCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := procfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)
@@ -95,15 +94,15 @@ func NewPressureStatsCollector(logger log.Logger) (Collector, error) {
 // Update calls procfs.NewPSIStatsForResource for the different resources and updates the values
 func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
 	for _, res := range psiResources {
-		level.Debug(c.logger).Log("msg", "collecting statistics for resource", "resource", res)
+		c.logger.Debug("collecting statistics for resource", "resource", res)
 		vals, err := c.fs.PSIStatsForResource(res)
 		if err != nil {
 			if errors.Is(err, os.ErrNotExist) {
-				level.Debug(c.logger).Log("msg", "pressure information is unavailable, you need a Linux kernel >= 4.20 and/or CONFIG_PSI enabled for your kernel")
+				c.logger.Debug("pressure information is unavailable, you need a Linux kernel >= 4.20 and/or CONFIG_PSI enabled for your kernel")
 				return ErrNoData
 			}
 			if errors.Is(err, syscall.ENOTSUP) {
-				level.Debug(c.logger).Log("msg", "pressure information is disabled, add psi=1 kernel command line to enable it")
+				c.logger.Debug("pressure information is disabled, add psi=1 kernel command line to enable it")
 				return ErrNoData
 			}
 			return fmt.Errorf("failed to retrieve pressure stats: %w", err)
@@ -111,11 +110,11 @@ func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
 		// IRQ pressure does not have 'some' data.
 		// See https://github.com/torvalds/linux/blob/v6.9/include/linux/psi_types.h#L65
 		if vals.Some == nil && res != "irq" {
-			level.Debug(c.logger).Log("msg", "pressure information returned no 'some' data")
+			c.logger.Debug("pressure information returned no 'some' data")
 			return ErrNoData
 		}
 		if vals.Full == nil && res != "cpu" {
-			level.Debug(c.logger).Log("msg", "pressure information returned no 'full' data")
+			c.logger.Debug("pressure information returned no 'full' data")
 			return ErrNoData
 		}
 		switch res {
@@ -130,7 +129,7 @@ func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
 		case "irq":
 			ch <- prometheus.MustNewConstMetric(c.irqFull, prometheus.CounterValue, float64(vals.Full.Total)/1000.0/1000.0)
 		default:
-			level.Debug(c.logger).Log("msg", "did not account for resource", "resource", res)
+			c.logger.Debug("did not account for resource", "resource", res)
 		}
 	}
 

collector/processes_linux.go

@@ -19,14 +19,13 @@ package collector
 import (
 	"errors"
 	"fmt"
+	"log/slog"
 	"os"
 	"path"
 	"strconv"
 	"strings"
 	"syscall"
 
-	"github.com/go-kit/log"
-	"github.com/go-kit/log/level"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/procfs"
 )
@@ -39,7 +38,7 @@ type processCollector struct {
 	procsState   *prometheus.Desc
 	pidUsed      *prometheus.Desc
 	pidMax       *prometheus.Desc
-	logger       log.Logger
+	logger       *slog.Logger
 }
 
 func init() {
@@ -47,7 +46,7 @@ func init() {
 }
 
 // NewProcessStatCollector returns a new Collector exposing process data read from the proc filesystem.
-func NewProcessStatCollector(logger log.Logger) (Collector, error) {
+func NewProcessStatCollector(logger *slog.Logger) (Collector, error) {
 	fs, err := procfs.NewFS(*procPath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to open procfs: %w", err)
@@ -130,10 +129,10 @@ func (c *processCollector) getAllocatedThreads() (int, map[string]int32, int, ma
 		if err != nil {
 			// PIDs can vanish between getting the list and getting stats.
 			if c.isIgnoredError(err) {
-				level.Debug(c.logger).Log("msg", "file not found when retrieving stats for pid", "pid", pid.PID, "err", err)
+				c.logger.Debug("file not found when retrieving stats for pid", "pid", pid.PID, "err", err)
 				continue
 			}
-			level.Debug(c.logger).Log("msg", "error reading stat for pid", "pid", pid.PID, "err", err)
+			c.logger.Debug("error reading stat for pid", "pid", pid.PID, "err", err)
 			return 0, nil, 0, nil, fmt.Errorf("error reading stat for pid %d: %w", pid.PID, err)
 		}
 		pids++
@@ -151,17 +150,17 @@ func (c *processCollector) getThreadStates(pid int, pidStat procfs.ProcStat, thr
 	fs, err := procfs.NewFS(procFilePath(path.Join(strconv.Itoa(pid), "task")))
 	if err != nil {
 		if c.isIgnoredError(err) {
-			level.Debug(c.logger).Log("msg", "file not found when retrieving tasks for pid", "pid", pid, "err", err)
+			c.logger.Debug("file not found when retrieving tasks for pid", "pid", pid, "err", err)
 			return nil
 		}
-		level.Debug(c.logger).Log("msg", "error reading tasks for pid", "pid", pid, "err", err)
+		c.logger.Debug("error reading tasks for pid", "pid", pid, "err", err)
 		return fmt.Errorf("error reading task for pid %d: %w", pid, err)
 	}
 
 	t, err := fs.AllProcs()
 	if err != nil {
 		if c.isIgnoredError(err) {
-			level.Debug(c.logger).Log("msg", "file not found when retrieving tasks for pid", "pid", pid, "err", err)
+			c.logger.Debug("file not found when retrieving tasks for pid", "pid", pid, "err", err)
 			return nil
 		}
 		return fmt.Errorf("unable to list all threads for pid: %d %w", pid, err)
@@ -175,10 +174,10 @@ func (c *processCollector) getThreadStates(pid int, pidStat procfs.ProcStat, thr
 		threadStat, err := thread.Stat()
 		if err != nil {
 			if c.isIgnoredError(err) {
-				level.Debug(c.logger).Log("msg", "file not found when retrieving stats for thread", "pid", pid, "threadId", thread.PID, "err", err)
+				c.logger.Debug("file not found when retrieving stats for thread", "pid", pid, "threadId", thread.PID, "err", err)
 				continue
 			}
-			level.Debug(c.logger).Log("msg", "error reading stat for thread", "pid", pid, "threadId", thread.PID, "err", err)
+			c.logger.Debug("error reading stat for thread", "pid", pid, "threadId", thread.PID, "err", err)
 			return fmt.Errorf("error reading stat for pid:%d thread:%d err:%w", pid, thread.PID, err)
 		}
 		threadStates[threadStat.State]++