Switch logging from glog to github.com/prometheus/log.

Dockerfile

@@ -2,5 +2,4 @@ FROM       golang:onbuild
 MAINTAINER Prometheus Team <prometheus-developers@googlegroups.com>
 
 ENTRYPOINT [ "go-wrapper", "run" ]
-CMD        [ "-logtostderr" ]
 EXPOSE     9100

README.md

@@ -10,12 +10,6 @@ collectors.
     make
     ./node_exporter <flags>
 
-The node_exporter uses the [glog][glog] library for logging. With the default
-parameters, nothing will be logged. Use `-logtostderr` to enable logging to
-stderr and `--help` to see more options about logging.
-
-[glog]: https://godoc.org/github.com/golang/glog
-
 ## Running tests
 
     make test

collector/diskstats.go

@@ -12,8 +12,8 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 const (
@@ -154,7 +154,7 @@ func (c *diskstatsCollector) Update(ch chan<- prometheus.Metric) (err error) {
 
 	for dev, stats := range diskStats {
 		if c.ignoredDevicesPattern.MatchString(dev) {
-			glog.V(1).Infof("Ignoring device: %s", dev)
+			log.Debugf("Ignoring device: %s", dev)
 			continue
 		}
 

collector/filesystem.go

@@ -11,8 +11,8 @@ import (
 	"strings"
 	"syscall"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 const (
@@ -40,7 +40,6 @@ func NewFilesystemCollector() (Collector, error) {
 	var filesystemLabelNames = []string{"filesystem"}
 
 	return &filesystemCollector{
-		
 		ignoredMountPointsPattern: regexp.MustCompile(*ignoredMountPoints),
 		size: prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{
@@ -98,7 +97,7 @@ func (c *filesystemCollector) Update(ch chan<- prometheus.Metric) (err error) {
 	}
 	for _, mp := range mps {
 		if c.ignoredMountPointsPattern.MatchString(mp) {
-			glog.V(1).Infof("Ignoring mount point: %s", mp)
+			log.Debugf("Ignoring mount point: %s", mp)
 			continue
 		}
 		buf := new(syscall.Statfs_t)

collector/gmond.go

@@ -11,8 +11,9 @@ import (
 	"regexp"
 	"time"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
+
 	"github.com/prometheus/node_exporter/collector/ganglia"
 )
 
@@ -44,7 +45,7 @@ func NewGmondCollector() (Collector, error) {
 
 func (c *gmondCollector) Update(ch chan<- prometheus.Metric) (err error) {
 	conn, err := net.Dial(gangliaProto, gangliaAddress)
-	glog.V(1).Infof("gmondCollector Update")
+	log.Debugf("gmondCollector Update")
 	if err != nil {
 		return fmt.Errorf("Can't connect to gmond: %s", err)
 	}
@@ -90,7 +91,7 @@ func (c *gmondCollector) setMetric(name, cluster string, metric ganglia.Metric)
 				break
 			}
 		}
-		glog.V(1).Infof("Register %s: %s", name, desc)
+		log.Debugf("Register %s: %s", name, desc)
 		c.metrics[name] = prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{
 				Namespace: gangliaNamespace,
@@ -100,7 +101,7 @@ func (c *gmondCollector) setMetric(name, cluster string, metric ganglia.Metric)
 			[]string{"cluster"},
 		)
 	}
-	glog.V(1).Infof("Set %s{cluster=%q}: %f", name, cluster, metric.Value)
+	log.Debugf("Set %s{cluster=%q}: %f", name, cluster, metric.Value)
 	c.metrics[name].WithLabelValues(cluster).Set(metric.Value)
 }
 

collector/lastlogin.go

@@ -10,8 +10,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 const lastLoginSubsystem = "last_login"
@@ -28,7 +28,6 @@ func init() {
 // load, seconds since last login and a list of tags as specified by config.
 func NewLastLoginCollector() (Collector, error) {
 	return &lastLoginCollector{
-		
 		metric: prometheus.NewGauge(prometheus.GaugeOpts{
 			Namespace: Namespace,
 			Subsystem: lastLoginSubsystem,
@@ -43,7 +42,7 @@ func (c *lastLoginCollector) Update(ch chan<- prometheus.Metric) (err error) {
 	if err != nil {
 		return fmt.Errorf("Couldn't get last seen: %s", err)
 	}
-	glog.V(1).Infof("Set node_last_login_time: %f", last)
+	log.Debugf("Set node_last_login_time: %f", last)
 	c.metric.Set(last)
 	c.metric.Collect(ch)
 	return err

collector/loadavg.go

@@ -8,8 +8,8 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 const (
@@ -41,7 +41,7 @@ func (c *loadavgCollector) Update(ch chan<- prometheus.Metric) (err error) {
 	if err != nil {
 		return fmt.Errorf("Couldn't get load: %s", err)
 	}
-	glog.V(1).Infof("Set node_load: %f", load)
+	log.Debugf("Set node_load: %f", load)
 	c.metric.Set(load)
 	c.metric.Collect(ch)
 	return err

collector/meminfo.go

@@ -11,8 +11,8 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 const (
@@ -21,7 +21,6 @@ const (
 )
 
 type meminfoCollector struct {
-	
 	metrics map[string]prometheus.Gauge
 }
 
@@ -42,7 +41,7 @@ func (c *meminfoCollector) Update(ch chan<- prometheus.Metric) (err error) {
 	if err != nil {
 		return fmt.Errorf("Couldn't get meminfo: %s", err)
 	}
-	glog.V(1).Infof("Set node_mem: %#v", memInfo)
+	log.Debugf("Set node_mem: %#v", memInfo)
 	for k, v := range memInfo {
 		if _, ok := c.metrics[k]; !ok {
 			c.metrics[k] = prometheus.NewGauge(prometheus.GaugeOpts{

collector/ntp.go

@@ -8,8 +8,8 @@ import (
 	"time"
 
 	"github.com/beevik/ntp"
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 var (
@@ -46,7 +46,7 @@ func (c *ntpCollector) Update(ch chan<- prometheus.Metric) (err error) {
 		return fmt.Errorf("Couldn't get ntp drift: %s", err)
 	}
 	drift := t.Sub(time.Now())
-	glog.V(1).Infof("Set ntp_drift_seconds: %f", drift.Seconds())
+	log.Debugf("Set ntp_drift_seconds: %f", drift.Seconds())
 	c.drift.Set(drift.Seconds())
 	c.drift.Collect(ch)
 	return err

collector/runit.go

@@ -3,8 +3,8 @@
 package collector
 
 import (
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 	"github.com/soundcloud/go-runit/runit"
 )
 
@@ -66,11 +66,11 @@ func (c *runitCollector) Update(ch chan<- prometheus.Metric) error {
 	for _, service := range services {
 		status, err := service.Status()
 		if err != nil {
-			glog.V(1).Infof("Couldn't get status for %s: %s, skipping...", service.Name, err)
+			log.Debugf("Couldn't get status for %s: %s, skipping...", service.Name, err)
 			continue
 		}
 
-		glog.V(1).Infof("%s is %d on pid %d for %d seconds", service.Name, status.State, status.Pid, status.Duration)
+		log.Debugf("%s is %d on pid %d for %d seconds", service.Name, status.State, status.Pid, status.Duration)
 		c.state.WithLabelValues(service.Name).Set(float64(status.State))
 		c.stateDesired.WithLabelValues(service.Name).Set(float64(status.Want))
 		if status.NormallyUp {

collector/textfile.go

@@ -13,8 +13,8 @@ import (
 
 	dto "github.com/prometheus/client_model/go"
 
-	"github.com/golang/glog"
 	"github.com/golang/protobuf/proto"
+	"github.com/prometheus/log"
 
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/text"
@@ -37,7 +37,7 @@ func NewTextFileCollector() (Collector, error) {
 	if *textFileDirectory == "" {
 		// This collector is enabled by default, so do not fail if
 		// the flag is not passed.
-		glog.Infof("No directory specified, see --textfile.directory")
+		log.Infof("No directory specified, see --textfile.directory")
 	} else {
 		prometheus.SetMetricFamilyInjectionHook(parseTextFiles)
 	}
@@ -65,13 +65,13 @@ func parseTextFiles() []*dto.MetricFamily {
 		path := filepath.Join(*textFileDirectory, f.Name())
 		file, err := os.Open(path)
 		if err != nil {
-			glog.Errorf("Error opening %s: %v", path, err)
+			log.Errorf("Error opening %s: %v", path, err)
 			error = 1.0
 			continue
 		}
 		parsedFamilies, err := parser.TextToMetricFamilies(file)
 		if err != nil {
-			glog.Errorf("Error parsing %s: %v", path, err)
+			log.Errorf("Error parsing %s: %v", path, err)
 			error = 1.0
 			continue
 		}

collector/time.go

@@ -5,8 +5,8 @@ package collector
 import (
 	"time"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 type timeCollector struct {
@@ -31,7 +31,7 @@ func NewTimeCollector() (Collector, error) {
 
 func (c *timeCollector) Update(ch chan<- prometheus.Metric) (err error) {
 	now := time.Now()
-	glog.V(1).Infof("Set time: %f", now.Unix())
+	log.Debugf("Set time: %f", now.Unix())
 	c.metric.Set(float64(now.Unix()))
 	c.metric.Collect(ch)
 	return err

node_exporter.go

@@ -13,8 +13,9 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
+
 	"github.com/prometheus/node_exporter/collector"
 )
 
@@ -93,10 +94,10 @@ func Execute(name string, c collector.Collector, ch chan<- prometheus.Metric) {
 	var result string
 
 	if err != nil {
-		glog.Infof("ERROR: %s failed after %fs: %s", name, duration.Seconds(), err)
+		log.Infof("ERROR: %s failed after %fs: %s", name, duration.Seconds(), err)
 		result = "error"
 	} else {
-		glog.Infof("OK: %s success after %fs.", name, duration.Seconds())
+		log.Infof("OK: %s success after %fs.", name, duration.Seconds())
 		result = "success"
 	}
 	scrapeDurations.WithLabelValues(name, result).Observe(duration.Seconds())
@@ -135,12 +136,12 @@ func main() {
 	}
 	collectors, err := loadCollectors()
 	if err != nil {
-		glog.Fatalf("Couldn't load collectors: %s", err)
+		log.Fatalf("Couldn't load collectors: %s", err)
 	}
 
-	glog.Infof("Enabled collectors:")
+	log.Infof("Enabled collectors:")
 	for n, _ := range collectors {
-		glog.Infof(" - %s", n)
+		log.Infof(" - %s", n)
 	}
 
 	nodeCollector := NodeCollector{collectors: collectors}
@@ -152,7 +153,7 @@ func main() {
 	handler := prometheus.Handler()
 	if *authUser != "" || *authPass != "" {
 		if *authUser == "" || *authPass == "" {
-			glog.Fatal("You need to specify -auth.user and -auth.pass to enable basic auth")
+			log.Fatal("You need to specify -auth.user and -auth.pass to enable basic auth")
 		}
 		handler = &basicAuthHandler{
 			handler:  prometheus.Handler().ServeHTTP,
@@ -172,9 +173,9 @@ func main() {
 			</html>`))
 	})
 
-	glog.Infof("Starting node_exporter v%s at %s", Version, *listenAddress)
+	log.Infof("Starting node_exporter v%s at %s", Version, *listenAddress)
 	err = http.ListenAndServe(*listenAddress, nil)
 	if err != nil {
-		glog.Fatal(err)
+		log.Fatal(err)
 	}
 }