Merge pull request #79 from prometheus/migrate-logging

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

Author: juliusv

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 (
@@ -26,7 +26,6 @@ var (
 )
 
 type diskstatsCollector struct {
-	
 	ignoredDevicesPattern *regexp.Regexp
 	metrics               []prometheus.Collector
 }
@@ -155,7 +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 (
@@ -25,7 +25,6 @@ var (
 )
 
 type filesystemCollector struct {
-	
 	ignoredMountPointsPattern *regexp.Regexp
 
 	size, free, avail, files, filesFree *prometheus.GaugeVec
@@ -41,7 +40,6 @@ func NewFilesystemCollector() (Collector, error) {
 	var filesystemLabelNames = []string{"filesystem"}
 
 	return &filesystemCollector{
-		
 		ignoredMountPointsPattern: regexp.MustCompile(*ignoredMountPoints),
 		size: prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{
@@ -99,7 +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"
 )
 
@@ -25,7 +26,6 @@ const (
 
 type gmondCollector struct {
 	metrics map[string]*prometheus.GaugeVec
-	
 }
 
 func init() {
@@ -45,7 +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)
 	}
@@ -91,7 +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,
@@ -101,7 +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/interrupts.go

@@ -18,7 +18,6 @@ const (
 )
 
 type interruptsCollector struct {
-	
 	metric *prometheus.CounterVec
 }
 
@@ -30,7 +29,6 @@ func init() {
 // interrupts stats
 func NewInterruptsCollector() (Collector, error) {
 	return &interruptsCollector{
-		
 		metric: prometheus.NewCounterVec(
 			prometheus.CounterOpts{
 				Namespace: Namespace,

collector/lastlogin.go

@@ -10,14 +10,13 @@ import (
 	"strings"
 	"time"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 const lastLoginSubsystem = "last_login"
 
 type lastLoginCollector struct {
-	
 	metric prometheus.Gauge
 }
 
@@ -29,7 +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,
@@ -44,7 +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

@@ -8,16 +8,15 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/golang/glog"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/log"
 )
 
 const (
 	procLoad = "/proc/loadavg"
 )
 
 type loadavgCollector struct {
-	
 	metric prometheus.Gauge
 }
 
@@ -29,7 +28,6 @@ func init() {
 // load, seconds since last login and a list of tags as specified by config.
 func NewLoadavgCollector() (Collector, error) {
 	return &loadavgCollector{
-		
 		metric: prometheus.NewGauge(prometheus.GaugeOpts{
 			Namespace: Namespace,
 			Name:      "load1",
@@ -43,7 +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/megacli.go

@@ -38,8 +38,7 @@ func init() {
 // RAID status through megacli.
 func NewMegaCliCollector() (Collector, error) {
 	return &megaCliCollector{
-		
-		cli:    *megacliCommand,
+		cli: *megacliCommand,
 		driveTemperature: prometheus.NewGaugeVec(prometheus.GaugeOpts{
 			Namespace: Namespace,
 			Name:      "megacli_drive_temperature_celsius",

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{