Migrated everything to new client_golang.

collector/attributes.go

@@ -8,12 +8,11 @@ import (
 )
 
 var (
-	attributes = prometheus.NewGauge()
+	attributes *prometheus.GaugeVec
 )
 
 type attributesCollector struct {
-	registry prometheus.Registry
-	config   Config
+	config Config
 }
 
 func init() {
@@ -22,22 +21,33 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // labels from the config.
-func NewAttributesCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewAttributesCollector(config Config) (Collector, error) {
 	c := attributesCollector{
-		config:   config,
-		registry: registry,
+		config: config,
 	}
-	registry.Register(
-		"node_attributes",
-		"node_exporter attributes",
-		prometheus.NilLabels,
-		attributes,
+	labelNames := []string{}
+	for l := range c.config.Attributes {
+		labelNames = append(labelNames, l)
+	}
+	gv := prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: Namespace,
+			Name:      "attributes",
+			Help:      "The node_exporter attributes.",
+		},
+		labelNames,
 	)
+	collector, err := prometheus.RegisterOrGet(gv)
+	if err != nil {
+		return nil, err
+	}
+	attributes = collector.(*prometheus.GaugeVec)
 	return &c, nil
 }
 
 func (c *attributesCollector) Update() (updates int, err error) {
 	glog.V(1).Info("Set node_attributes{%v}: 1", c.config.Attributes)
-	attributes.Set(c.config.Attributes, 1)
+	attributes.Reset()
+	attributes.With(c.config.Attributes).Set(1)
 	return updates, err
 }

collector/collector.go

@@ -1,11 +1,9 @@
 // Exporter is a prometheus exporter using multiple Factories to collect and export system metrics.
 package collector
 
-import (
-	"github.com/prometheus/client_golang/prometheus"
-)
+const Namespace = "node"
 
-var Factories = make(map[string]func(Config, prometheus.Registry) (Collector, error))
+var Factories = make(map[string]func(Config) (Collector, error))
 
 // Interface a collector has to implement.
 type Collector interface {

collector/diskstats.go

@@ -18,35 +18,119 @@ import (
 
 const (
 	procDiskStats = "/proc/diskstats"
+	diskSubsystem = "disk"
 )
 
-type diskStat struct {
-	name          string
-	metric        prometheus.Metric
-	documentation string
-}
-
 var (
 	ignoredDevices = flag.String("diskstatsIgnoredDevices", "^(ram|loop|(h|s|xv)d[a-z])\\d+$", "Regexp of devices to ignore for diskstats.")
 
+	diskLabelNames = []string{"device"}
+
 	// Docs from https://www.kernel.org/doc/Documentation/iostats.txt
-	diskStatsMetrics = []diskStat{
-		{"reads_completed", prometheus.NewCounter(), "The total number of reads completed successfully."},
-		{"reads_merged", prometheus.NewCounter(), "The number of reads merged. See https://www.kernel.org/doc/Documentation/iostats.txt"},
-		{"sectors_read", prometheus.NewCounter(), "The total number of sectors read successfully."},
-		{"read_time_ms", prometheus.NewCounter(), "the total number of milliseconds spent by all reads."},
-		{"writes_completed", prometheus.NewCounter(), "The total number of writes completed successfully."},
-		{"writes_merged", prometheus.NewCounter(), "The number of writes merged. See https://www.kernel.org/doc/Documentation/iostats.txt"},
-		{"sectors_written", prometheus.NewCounter(), "The total number of sectors written successfully."},
-		{"write_time_ms", prometheus.NewCounter(), "This is the total number of milliseconds spent by all writes."},
-		{"io_now", prometheus.NewGauge(), "The number of I/Os currently in progress."},
-		{"io_time_ms", prometheus.NewCounter(), "Milliseconds spent doing I/Os."},
-		{"io_time_weighted", prometheus.NewCounter(), "The weighted # of milliseconds spent doing I/Os. See https://www.kernel.org/doc/Documentation/iostats.txt"},
+	diskStatsMetrics = []prometheus.Collector{
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "reads_completed",
+				Help:      "The total number of reads completed successfully.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "reads_merged",
+				Help:      "The number of reads merged. See https://www.kernel.org/doc/Documentation/iostats.txt.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "sectors_read",
+				Help:      "The total number of sectors read successfully.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "read_time_ms",
+				Help:      "The total number of milliseconds spent by all reads.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "writes_completed",
+				Help:      "The total number of writes completed successfully.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "writes_merged",
+				Help:      "The number of writes merged. See https://www.kernel.org/doc/Documentation/iostats.txt.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "sectors_written",
+				Help:      "The total number of sectors written successfully.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "write_time_ms",
+				Help:      "This is the total number of milliseconds spent by all writes.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewGaugeVec(
+			prometheus.GaugeOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "io_now",
+				Help:      "The number of I/Os currently in progress.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "io_time_ms",
+				Help:      "Milliseconds spent doing I/Os.",
+			},
+			diskLabelNames,
+		),
+		prometheus.NewCounterVec(
+			prometheus.CounterOpts{
+				Namespace: Namespace,
+				Subsystem: diskSubsystem,
+				Name:      "io_time_weighted",
+				Help:      "The weighted # of milliseconds spent doing I/Os. See https://www.kernel.org/doc/Documentation/iostats.txt.",
+			},
+			diskLabelNames,
+		),
 	}
 )
 
 type diskstatsCollector struct {
-	registry              prometheus.Registry
 	config                Config
 	ignoredDevicesPattern *regexp.Regexp
 }
@@ -57,20 +141,16 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // disk device stats.
-func NewDiskstatsCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewDiskstatsCollector(config Config) (Collector, error) {
 	c := diskstatsCollector{
 		config:                config,
-		registry:              registry,
 		ignoredDevicesPattern: regexp.MustCompile(*ignoredDevices),
 	}
 
-	for _, v := range diskStatsMetrics {
-		registry.Register(
-			"node_disk_"+v.name,
-			v.documentation,
-			prometheus.NilLabels,
-			v.metric,
-		)
+	for _, c := range diskStatsMetrics {
+		if _, err := prometheus.RegisterOrGet(c); err != nil {
+			return nil, err
+		}
 	}
 	return &c, nil
 }
@@ -91,13 +171,12 @@ func (c *diskstatsCollector) Update() (updates int, err error) {
 			if err != nil {
 				return updates, fmt.Errorf("Invalid value %s in diskstats: %s", value, err)
 			}
-			labels := map[string]string{"device": dev}
-			counter, ok := diskStatsMetrics[k].metric.(prometheus.Counter)
+			counter, ok := diskStatsMetrics[k].(*prometheus.CounterVec)
 			if ok {
-				counter.Set(labels, v)
+				counter.WithLabelValues(dev).Set(v)
 			} else {
-				var gauge = diskStatsMetrics[k].metric.(prometheus.Gauge)
-				gauge.Set(labels, v)
+				var gauge = diskStatsMetrics[k].(*prometheus.GaugeVec)
+				gauge.WithLabelValues(dev).Set(v)
 			}
 		}
 	}

collector/filesystem.go

@@ -11,26 +11,68 @@ import (
 	"strings"
 	"syscall"
 
-        "github.com/golang/glog"
+	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
 )
 
 const (
-	procMounts = "/proc/mounts"
+	procMounts          = "/proc/mounts"
+	filesystemSubsystem = "filesystem"
 )
 
 var (
-	fsSizeMetric      = prometheus.NewGauge()
-	fsFreeMetric      = prometheus.NewGauge()
-	fsAvailMetric     = prometheus.NewGauge()
-	fsFilesMetric     = prometheus.NewGauge()
-	fsFilesFreeMetric = prometheus.NewGauge()
+	filesystemLabelNames = []string{"filesystem"}
+
+	fsSizeMetric = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: Namespace,
+			Subsystem: filesystemSubsystem,
+			Name:      "size",
+			Help:      "Filesystem size in bytes.",
+		},
+		filesystemLabelNames,
+	)
+	fsFreeMetric = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: Namespace,
+			Subsystem: filesystemSubsystem,
+			Name:      "free",
+			Help:      "Filesystem free space in bytes.",
+		},
+		filesystemLabelNames,
+	)
+	fsAvailMetric = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: Namespace,
+			Subsystem: filesystemSubsystem,
+			Name:      "avail",
+			Help:      "Filesystem space available to non-root users in bytes.",
+		},
+		filesystemLabelNames,
+	)
+	fsFilesMetric = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: Namespace,
+			Subsystem: filesystemSubsystem,
+			Name:      "files",
+			Help:      "Filesystem total file nodes.",
+		},
+		filesystemLabelNames,
+	)
+	fsFilesFreeMetric = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: Namespace,
+			Subsystem: filesystemSubsystem,
+			Name:      "files_free",
+			Help:      "Filesystem total free file nodes.",
+		},
+		filesystemLabelNames,
+	)
 
 	ignoredMountPoints = flag.String("filesystemIgnoredMountPoints", "^/(sys|proc|dev)($|/)", "Regexp of mount points to ignore for filesystem collector.")
 )
 
 type filesystemCollector struct {
-	registry                  prometheus.Registry
 	config                    Config
 	ignoredMountPointsPattern *regexp.Regexp
 }
@@ -41,42 +83,26 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // network device filesystems.
-func NewFilesystemCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewFilesystemCollector(config Config) (Collector, error) {
 	c := filesystemCollector{
-		config:                    config,
-		registry:                  registry,
+		config: config,
 		ignoredMountPointsPattern: regexp.MustCompile(*ignoredMountPoints),
 	}
-	registry.Register(
-		"node_filesystem_size",
-		"Filesystem size in bytes.",
-		prometheus.NilLabels,
-		fsSizeMetric,
-	)
-	registry.Register(
-		"node_filesystem_free",
-		"Filesystem free space in bytes.",
-		prometheus.NilLabels,
-		fsFreeMetric,
-	)
-	registry.Register(
-		"node_filesystem_avail",
-		"Filesystem space available to non-root users in bytes.",
-		prometheus.NilLabels,
-		fsAvailMetric,
-	)
-	registry.Register(
-		"node_filesystem_files",
-		"Filesystem total file nodes.",
-		prometheus.NilLabels,
-		fsFilesMetric,
-	)
-	registry.Register(
-		"node_filesystem_files_free",
-		"Filesystem total free file nodes.",
-		prometheus.NilLabels,
-		fsFilesFreeMetric,
-	)
+	if _, err := prometheus.RegisterOrGet(fsSizeMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(fsFreeMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(fsAvailMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(fsFilesMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(fsFilesFreeMetric); err != nil {
+		return nil, err
+	}
 	return &c, nil
 }
 
@@ -96,11 +122,11 @@ func (c *filesystemCollector) Update() (updates int, err error) {
 		if err != nil {
 			return updates, fmt.Errorf("Statfs on %s returned %s", mp, err)
 		}
-		fsSizeMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Blocks)*float64(buf.Bsize))
-		fsFreeMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Bfree)*float64(buf.Bsize))
-		fsAvailMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Bavail)*float64(buf.Bsize))
-		fsFilesMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Files))
-		fsFilesFreeMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Ffree))
+		fsSizeMetric.WithLabelValues(mp).Set(float64(buf.Blocks) * float64(buf.Bsize))
+		fsFreeMetric.WithLabelValues(mp).Set(float64(buf.Bfree) * float64(buf.Bsize))
+		fsAvailMetric.WithLabelValues(mp).Set(float64(buf.Bavail) * float64(buf.Bsize))
+		fsFilesMetric.WithLabelValues(mp).Set(float64(buf.Files))
+		fsFilesFreeMetric.WithLabelValues(mp).Set(float64(buf.Ffree))
 		updates++
 	}
 	return updates, err

collector/interrupts.go

@@ -18,12 +18,18 @@ const (
 )
 
 var (
-	interruptsMetric = prometheus.NewCounter()
+	interruptsMetric = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: Namespace,
+			Name:      "interrupts",
+			Help:      "Interrupt details from /proc/interrupts.",
+		},
+		[]string{"CPU", "type", "info", "devices"},
+	)
 )
 
 type interruptsCollector struct {
-	registry prometheus.Registry
-	config   Config
+	config Config
 }
 
 func init() {
@@ -32,17 +38,13 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // interrupts stats
-func NewInterruptsCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewInterruptsCollector(config Config) (Collector, error) {
 	c := interruptsCollector{
-		config:   config,
-		registry: registry,
+		config: config,
+	}
+	if _, err := prometheus.RegisterOrGet(interruptsMetric); err != nil {
+		return nil, err
 	}
-	registry.Register(
-		"node_interrupts",
-		"Interrupt details from /proc/interrupts",
-		prometheus.NilLabels,
-		interruptsMetric,
-	)
 	return &c, nil
 }
 
@@ -58,13 +60,13 @@ func (c *interruptsCollector) Update() (updates int, err error) {
 			if err != nil {
 				return updates, fmt.Errorf("Invalid value %s in interrupts: %s", value, err)
 			}
-			labels := map[string]string{
+			labels := prometheus.Labels{
 				"CPU":     strconv.Itoa(cpuNo),
 				"type":    name,
 				"info":    interrupt.info,
 				"devices": interrupt.devices,
 			}
-			interruptsMetric.Set(labels, fv)
+			interruptsMetric.With(labels).Set(fv)
 		}
 	}
 	return updates, err

collector/lastlogin.go

@@ -14,13 +14,19 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+const lastLoginSubsystem = "last_login"
+
 var (
-	lastSeen = prometheus.NewGauge()
+	lastSeen = prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace: Namespace,
+		Subsystem: lastLoginSubsystem,
+		Name:      "time",
+		Help:      "The time of the last login.",
+	})
 )
 
 type lastLoginCollector struct {
-	registry prometheus.Registry
-	config   Config
+	config Config
 }
 
 func init() {
@@ -29,17 +35,13 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // load, seconds since last login and a list of tags as specified by config.
-func NewLastLoginCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewLastLoginCollector(config Config) (Collector, error) {
 	c := lastLoginCollector{
-		config:   config,
-		registry: registry,
+		config: config,
+	}
+	if _, err := prometheus.RegisterOrGet(lastSeen); err != nil {
+		return nil, err
 	}
-	registry.Register(
-		"node_last_login_time",
-		"The time of the last login.",
-		prometheus.NilLabels,
-		lastSeen,
-	)
 	return &c, nil
 }
 
@@ -50,7 +52,7 @@ func (c *lastLoginCollector) Update() (updates int, err error) {
 	}
 	updates++
 	glog.V(1).Infof("Set node_last_login_time: %f", last)
-	lastSeen.Set(nil, last)
+	lastSeen.Set(last)
 	return updates, err
 }
 

collector/loadavg.go

@@ -17,12 +17,15 @@ const (
 )
 
 var (
-	load1 = prometheus.NewGauge()
+	load1 = prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace: Namespace,
+		Name:      "load1",
+		Help:      "1m load average.",
+	})
 )
 
 type loadavgCollector struct {
-	registry prometheus.Registry
-	config   Config
+	config Config
 }
 
 func init() {
@@ -31,18 +34,14 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // load, seconds since last login and a list of tags as specified by config.
-func NewLoadavgCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewLoadavgCollector(config Config) (Collector, error) {
 	c := loadavgCollector{
-		config:   config,
-		registry: registry,
+		config: config,
 	}
 
-	registry.Register(
-		"node_load1",
-		"1m load average",
-		prometheus.NilLabels,
-		load1,
-	)
+	if _, err := prometheus.RegisterOrGet(load1); err != nil {
+		return nil, err
+	}
 	return &c, nil
 }
 
@@ -53,7 +52,7 @@ func (c *loadavgCollector) Update() (updates int, err error) {
 	}
 	updates++
 	glog.V(1).Infof("Set node_load: %f", load)
-	load1.Set(nil, load)
+	load1.Set(load)
 
 	return updates, err
 }

collector/meminfo.go

@@ -16,7 +16,8 @@ import (
 )
 
 const (
-	procMemInfo = "/proc/meminfo"
+	procMemInfo      = "/proc/meminfo"
+	memInfoSubsystem = "memory"
 )
 
 var (
@@ -24,8 +25,7 @@ var (
 )
 
 type meminfoCollector struct {
-	registry prometheus.Registry
-	config   Config
+	config Config
 }
 
 func init() {
@@ -34,10 +34,9 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // memory stats.
-func NewMeminfoCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewMeminfoCollector(config Config) (Collector, error) {
 	c := meminfoCollector{
-		config:   config,
-		registry: registry,
+		config: config,
 	}
 	return &c, nil
 }
@@ -50,16 +49,16 @@ func (c *meminfoCollector) Update() (updates int, err error) {
 	glog.V(1).Infof("Set node_mem: %#v", memInfo)
 	for k, v := range memInfo {
 		if _, ok := memInfoMetrics[k]; !ok {
-			memInfoMetrics[k] = prometheus.NewGauge()
-			c.registry.Register(
-				"node_memory_"+k,
-				k+" from /proc/meminfo",
-				prometheus.NilLabels,
-				memInfoMetrics[k],
-			)
+			gauge := prometheus.NewGauge(prometheus.GaugeOpts{
+				Namespace: Namespace,
+				Subsystem: memInfoSubsystem,
+				Name:      k,
+				Help:      k + " from /proc/meminfo.",
+			})
+			memInfoMetrics[k] = prometheus.MustRegisterOrGet(gauge).(prometheus.Gauge)
 		}
 		updates++
-		memInfoMetrics[k].Set(nil, v)
+		memInfoMetrics[k].Set(v)
 	}
 	return updates, err
 }

collector/netdev.go

@@ -14,16 +14,16 @@ import (
 )
 
 const (
-	procNetDev = "/proc/net/dev"
+	procNetDev        = "/proc/net/dev"
+	netStatsSubsystem = "network"
 )
 
 var (
-	netStatsMetrics = map[string]prometheus.Gauge{}
+	netStatsMetrics = map[string]*prometheus.GaugeVec{}
 )
 
 type netDevCollector struct {
-	registry prometheus.Registry
-	config   Config
+	config Config
 }
 
 func init() {
@@ -32,10 +32,9 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // network device stats.
-func NewNetDevCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewNetDevCollector(config Config) (Collector, error) {
 	c := netDevCollector{
-		config:   config,
-		registry: registry,
+		config: config,
 	}
 	return &c, nil
 }
@@ -50,20 +49,23 @@ func (c *netDevCollector) Update() (updates int, err error) {
 			for t, value := range stats {
 				key := direction + "_" + t
 				if _, ok := netStatsMetrics[key]; !ok {
-					netStatsMetrics[key] = prometheus.NewGauge()
-					c.registry.Register(
-						"node_network_"+key,
-						t+" "+direction+" from /proc/net/dev",
-						prometheus.NilLabels,
-						netStatsMetrics[key],
+					gv := prometheus.NewGaugeVec(
+						prometheus.GaugeOpts{
+							Namespace: Namespace,
+							Subsystem: netStatsSubsystem,
+							Name:      key,
+							Help:      fmt.Sprintf("%s %s from /proc/net/dev.", t, direction),
+						},
+						[]string{"device"},
 					)
+					netStatsMetrics[key] = prometheus.MustRegisterOrGet(gv).(*prometheus.GaugeVec)
 				}
 				updates++
 				v, err := strconv.ParseFloat(value, 64)
 				if err != nil {
 					return updates, fmt.Errorf("Invalid value %s in netstats: %s", value, err)
 				}
-				netStatsMetrics[key].Set(map[string]string{"device": dev}, v)
+				netStatsMetrics[key].WithLabelValues(dev).Set(v)
 			}
 		}
 	}

collector/stat.go

@@ -19,18 +19,48 @@ const (
 )
 
 var (
-	cpuMetrics         = prometheus.NewCounter()
-	intrMetric         = prometheus.NewCounter()
-	ctxtMetric         = prometheus.NewCounter()
-	btimeMetric        = prometheus.NewGauge()
-	forksMetric        = prometheus.NewCounter()
-	procsRunningMetric = prometheus.NewGauge()
-	procsBlockedMetric = prometheus.NewGauge()
+	cpuMetrics = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: Namespace,
+			Name:      "cpu",
+			Help:      "Seconds the cpus spent in each mode.",
+		},
+		[]string{"cpu", "mode"},
+	)
+	intrMetric = prometheus.NewCounter(prometheus.CounterOpts{
+		Namespace: Namespace,
+		Name:      "intr",
+		Help:      "Total number of interrupts serviced.",
+	})
+	ctxtMetric = prometheus.NewCounter(prometheus.CounterOpts{
+		Namespace: Namespace,
+		Name:      "context_switches",
+		Help:      "Total number of context switches.",
+	})
+	forksMetric = prometheus.NewCounter(prometheus.CounterOpts{
+		Namespace: Namespace,
+		Name:      "forks",
+		Help:      "Total number of forks.",
+	})
+	btimeMetric = prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace: Namespace,
+		Name:      "boot_time",
+		Help:      "Node boot time, in unixtime.",
+	})
+	procsRunningMetric = prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace: Namespace,
+		Name:      "procs_running",
+		Help:      "Number of processes in runnable state.",
+	})
+	procsBlockedMetric = prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace: Namespace,
+		Name:      "procs_blocked",
+		Help:      "Number of processes blocked waiting for I/O to complete.",
+	})
 )
 
 type statCollector struct {
-	registry prometheus.Registry
-	config   Config
+	config Config
 }
 
 func init() {
@@ -39,53 +69,31 @@ func init() {
 
 // Takes a config struct and prometheus registry and returns a new Collector exposing
 // network device stats.
-func NewStatCollector(config Config, registry prometheus.Registry) (Collector, error) {
+func NewStatCollector(config Config) (Collector, error) {
 	c := statCollector{
-		config:   config,
-		registry: registry,
+		config: config,
+	}
+	if _, err := prometheus.RegisterOrGet(cpuMetrics); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(intrMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(ctxtMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(forksMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(btimeMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(procsRunningMetric); err != nil {
+		return nil, err
+	}
+	if _, err := prometheus.RegisterOrGet(procsBlockedMetric); err != nil {
+		return nil, err
 	}
-	registry.Register(
-		"node_cpu",
-		"Seconds the cpus spent in each mode.",
-		prometheus.NilLabels,
-		cpuMetrics,
-	)
-	registry.Register(
-		"node_intr",
-		"Total number of interrupts serviced",
-		prometheus.NilLabels,
-		intrMetric,
-	)
-	registry.Register(
-		"node_context_switches",
-		"Total number of context switches.",
-		prometheus.NilLabels,
-		ctxtMetric,
-	)
-	registry.Register(
-		"node_forks",
-		"Total number of forks.",
-		prometheus.NilLabels,
-		forksMetric,
-	)
-	registry.Register(
-		"node_boot_time",
-		"Node boot time, in unixtime.",
-		prometheus.NilLabels,
-		btimeMetric,
-	)
-	registry.Register(
-		"node_procs_running",
-		"Number of processes in runnable state.",
-		prometheus.NilLabels,
-		procsRunningMetric,
-	)
-	registry.Register(
-		"node_procs_blocked",
-		"Number of processes blocked waiting for I/O to complete.",
-		prometheus.NilLabels,
-		procsBlockedMetric,
-	)
 	return &c, nil
 }
 
@@ -113,9 +121,9 @@ func (c *statCollector) Update() (updates int, err error) {
 				if err != nil {
 					return updates, err
 				}
-                                // Convert from ticks to seconds
+				// Convert from ticks to seconds
 				value /= float64(C.sysconf(C._SC_CLK_TCK))
-				cpuMetrics.Set(map[string]string{"cpu": parts[0], "mode": cpuFields[i]}, value)
+				cpuMetrics.With(prometheus.Labels{"cpu": parts[0], "mode": cpuFields[i]}).Set(value)
 			}
 		case parts[0] == "intr":
 			// Only expose the overall number, use the 'interrupts' collector for more detail.
@@ -123,37 +131,37 @@ func (c *statCollector) Update() (updates int, err error) {
 			if err != nil {
 				return updates, err
 			}
-			intrMetric.Set(prometheus.NilLabels, value)
+			intrMetric.Set(value)
 		case parts[0] == "ctxt":
 			value, err := strconv.ParseFloat(parts[1], 64)
 			if err != nil {
 				return updates, err
 			}
-			ctxtMetric.Set(prometheus.NilLabels, value)
+			ctxtMetric.Set(value)
 		case parts[0] == "processes":
 			value, err := strconv.ParseFloat(parts[1], 64)
 			if err != nil {
 				return updates, err
 			}
-			forksMetric.Set(prometheus.NilLabels, value)
+			forksMetric.Set(value)
 		case parts[0] == "btime":
 			value, err := strconv.ParseFloat(parts[1], 64)
 			if err != nil {
 				return updates, err
 			}
-			btimeMetric.Set(prometheus.NilLabels, value)
+			btimeMetric.Set(value)
 		case parts[0] == "procs_running":
 			value, err := strconv.ParseFloat(parts[1], 64)
 			if err != nil {
 				return updates, err
 			}
-			procsRunningMetric.Set(prometheus.NilLabels, value)
+			procsRunningMetric.Set(value)
 		case parts[0] == "procs_blocked":
 			value, err := strconv.ParseFloat(parts[1], 64)
 			if err != nil {
 				return updates, err
 			}
-			procsBlockedMetric.Set(prometheus.NilLabels, value)
+			procsBlockedMetric.Set(value)
 		}
 	}
 	return updates, err

node_exporter.go

@@ -17,10 +17,11 @@ import (
 
 	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/exp"
 	"github.com/prometheus/node_exporter/collector"
 )
 
+const subsystem = "exporter"
+
 var (
 	configFile        = flag.String("config", "node_exporter.conf", "config file.")
 	memProfile        = flag.String("memprofile", "", "write memory profile to this file")
@@ -28,8 +29,27 @@ var (
 	enabledCollectors = flag.String("enabledCollectors", "attributes,diskstats,filesystem,loadavg,meminfo,stat,netdev", "comma-seperated list of collectors to use")
 	printCollectors   = flag.Bool("printCollectors", false, "If true, print available collectors and exit")
 	interval          = flag.Duration("interval", 60*time.Second, "refresh interval")
-	scrapeDurations   = prometheus.NewDefaultHistogram()
-	metricsUpdated    = prometheus.NewGauge()
+
+	collectorLabelNames = []string{"collector", "result"}
+
+	scrapeDurations = prometheus.NewSummaryVec(
+		prometheus.SummaryOpts{
+			Namespace: collector.Namespace,
+			Subsystem: subsystem,
+			Name:      "scrape_duration_seconds",
+			Help:      "node_exporter: Duration of a scrape job.",
+		},
+		collectorLabelNames,
+	)
+	metricsUpdated = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Namespace: collector.Namespace,
+			Subsystem: subsystem,
+			Name:      "metrics_updated",
+			Help:      "node_exporter: Number of metrics updated.",
+		},
+		collectorLabelNames,
+	)
 )
 
 func main() {
@@ -41,14 +61,13 @@ func main() {
 		}
 		return
 	}
-	registry := prometheus.NewRegistry()
-	collectors, err := loadCollectors(*configFile, registry)
+	collectors, err := loadCollectors(*configFile)
 	if err != nil {
 		log.Fatalf("Couldn't load config and collectors: %s", err)
 	}
 
-	registry.Register("node_exporter_scrape_duration_seconds", "node_exporter: Duration of a scrape job.", prometheus.NilLabels, scrapeDurations)
-	registry.Register("node_exporter_metrics_updated", "node_exporter: Number of metrics updated.", prometheus.NilLabels, metricsUpdated)
+	prometheus.MustRegister(scrapeDurations)
+	prometheus.MustRegister(metricsUpdated)
 
 	glog.Infof("Enabled collectors:")
 	for n, _ := range collectors {
@@ -60,7 +79,7 @@ func main() {
 	signal.Notify(sigHup, syscall.SIGHUP)
 	signal.Notify(sigUsr1, syscall.SIGUSR1)
 
-	go serveStatus(registry)
+	go serveStatus()
 
 	glog.Infof("Starting initial collection")
 	collect(collectors)
@@ -69,7 +88,7 @@ func main() {
 	for {
 		select {
 		case <-sigHup:
-			collectors, err = loadCollectors(*configFile, registry)
+			collectors, err = loadCollectors(*configFile)
 			if err != nil {
 				log.Fatalf("Couldn't load config and collectors: %s", err)
 			}
@@ -96,7 +115,7 @@ func main() {
 
 }
 
-func loadCollectors(file string, registry prometheus.Registry) (map[string]collector.Collector, error) {
+func loadCollectors(file string) (map[string]collector.Collector, error) {
 	collectors := map[string]collector.Collector{}
 	config, err := getConfig(file)
 	if err != nil {
@@ -107,7 +126,7 @@ func loadCollectors(file string, registry prometheus.Registry) (map[string]colle
 		if !ok {
 			log.Fatalf("Collector '%s' not available", name)
 		}
-		c, err := fn(*config, registry)
+		c, err := fn(*config)
 		if err != nil {
 			return nil, err
 		}
@@ -126,9 +145,9 @@ func getConfig(file string) (*collector.Config, error) {
 	return config, json.Unmarshal(bytes, &config)
 }
 
-func serveStatus(registry prometheus.Registry) {
-	exp.Handle(prometheus.ExpositionResource, registry.Handler())
-	http.ListenAndServe(*listeningAddress, exp.DefaultCoarseMux)
+func serveStatus() {
+	http.Handle("/metrics", prometheus.Handler())
+	http.ListenAndServe(*listeningAddress, nil)
 }
 
 func collect(collectors map[string]collector.Collector) {
@@ -147,17 +166,15 @@ func Execute(name string, c collector.Collector) {
 	begin := time.Now()
 	updates, err := c.Update()
 	duration := time.Since(begin)
+	var result string
 
-	label := map[string]string{
-		"collector": name,
-	}
 	if err != nil {
 		glog.Infof("ERROR: %s failed after %fs: %s", name, duration.Seconds(), err)
-		label["result"] = "error"
+		result = "error"
 	} else {
 		glog.Infof("OK: %s success after %fs.", name, duration.Seconds())
-		label["result"] = "success"
+		result = "success"
 	}
-	scrapeDurations.Add(label, duration.Seconds())
-	metricsUpdated.Set(label, float64(updates))
+	scrapeDurations.WithLabelValues(name, result).Observe(duration.Seconds())
+	metricsUpdated.WithLabelValues(name, result).Set(float64(updates))
 }