Use flags instead of config and remove attributes

README.md

@@ -31,7 +31,6 @@ Which collectors are used is controlled by the `--collectors.enabled` flag.
 
 Name     | Description
 ---------|------------
-attributes | Exposes attributes from the configuration file. Deprecated, use textfile module instead.
 diskstats | Exposes disk I/O statistics from `/proc/diskstats`.
 filesystem | Exposes filesystem statistics, such as disk space used.
 loadavg | Exposes load average.

collector/attributes.go

@@ -1,46 +0,0 @@
-// +build !noattributes
-
-package collector
-
-import (
-	"github.com/golang/glog"
-	"github.com/prometheus/client_golang/prometheus"
-)
-
-type attributesCollector struct {
-	config Config
-	metric *prometheus.GaugeVec
-}
-
-func init() {
-	Factories["attributes"] = NewAttributesCollector
-}
-
-// Takes a config struct and prometheus registry and returns a new Collector exposing
-// labels from the config.
-func NewAttributesCollector(config Config) (Collector, error) {
-	labelNames := []string{}
-	for l := range config.Attributes {
-		labelNames = append(labelNames, l)
-	}
-
-	return &attributesCollector{
-		config: config,
-		metric: prometheus.NewGaugeVec(
-			prometheus.GaugeOpts{
-				Namespace: Namespace,
-				Name:      "attributes",
-				Help:      "The node_exporter attributes.",
-			},
-			labelNames,
-		),
-	}, nil
-}
-
-func (c *attributesCollector) Update(ch chan<- prometheus.Metric) (err error) {
-	glog.V(1).Info("Set node_attributes{%v}: 1", c.config.Attributes)
-	c.metric.Reset()
-	c.metric.With(c.config.Attributes).Set(1)
-	c.metric.Collect(ch)
-	return err
-}

collector/bonding.go

@@ -26,7 +26,7 @@ func init() {
 
 // NewBondingCollector returns a newly allocated bondingCollector.
 // It exposes the number of configured and active slave of linux bonding interfaces.
-func NewBondingCollector(config Config) (Collector, error) {
+func NewBondingCollector() (Collector, error) {
 	return &bondingCollector{
 		slaves: prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{

collector/collector.go

@@ -7,7 +7,7 @@ import (
 
 const Namespace = "node"
 
-var Factories = make(map[string]func(Config) (Collector, error))
+var Factories = make(map[string]func() (Collector, error))
 
 // Interface a collector has to implement.
 type Collector interface {
@@ -20,8 +20,3 @@ type Collector interface {
 // scraped. (However, for metric gathering that takes very long, it might
 // actually be better to do them proactively before scraping to minimize scrape
 // time.)
-
-type Config struct {
-	Config     map[string]string `json:"config"`
-	Attributes map[string]string `json:"attributes"`
-}

collector/diskstats.go

@@ -26,7 +26,7 @@ var (
 )
 
 type diskstatsCollector struct {
-	config                Config
+	
 	ignoredDevicesPattern *regexp.Regexp
 	metrics               []prometheus.Collector
 }
@@ -35,13 +35,12 @@ func init() {
 	Factories["diskstats"] = NewDiskstatsCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // disk device stats.
-func NewDiskstatsCollector(config Config) (Collector, error) {
+func NewDiskstatsCollector() (Collector, error) {
 	var diskLabelNames = []string{"device"}
 
 	return &diskstatsCollector{
-		config:                config,
 		ignoredDevicesPattern: regexp.MustCompile(*ignoredDevices),
 		// Docs from https://www.kernel.org/doc/Documentation/iostats.txt
 		metrics: []prometheus.Collector{

collector/filesystem.go

@@ -25,7 +25,7 @@ var (
 )
 
 type filesystemCollector struct {
-	config                    Config
+	
 	ignoredMountPointsPattern *regexp.Regexp
 
 	size, free, avail, files, filesFree *prometheus.GaugeVec
@@ -35,13 +35,13 @@ func init() {
 	Factories["filesystem"] = NewFilesystemCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // network device filesystems.
-func NewFilesystemCollector(config Config) (Collector, error) {
+func NewFilesystemCollector() (Collector, error) {
 	var filesystemLabelNames = []string{"filesystem"}
 
 	return &filesystemCollector{
-		config: config,
+		
 		ignoredMountPointsPattern: regexp.MustCompile(*ignoredMountPoints),
 		size: prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{

collector/gmond.go

@@ -25,7 +25,7 @@ const (
 
 type gmondCollector struct {
 	metrics map[string]*prometheus.GaugeVec
-	config  Config
+	
 }
 
 func init() {
@@ -34,10 +34,9 @@ func init() {
 
 var illegalCharsRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
 
-// Takes a config struct and prometheus registry and returns a new Collector scraping ganglia.
-func NewGmondCollector(config Config) (Collector, error) {
+// Takes a prometheus registry and returns a new Collector scraping ganglia.
+func NewGmondCollector() (Collector, error) {
 	c := gmondCollector{
-		config:  config,
 		metrics: map[string]*prometheus.GaugeVec{},
 	}
 

collector/interrupts.go

@@ -18,7 +18,7 @@ const (
 )
 
 type interruptsCollector struct {
-	config Config
+	
 	metric *prometheus.CounterVec
 }
 
@@ -26,11 +26,11 @@ func init() {
 	Factories["interrupts"] = NewInterruptsCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // interrupts stats
-func NewInterruptsCollector(config Config) (Collector, error) {
+func NewInterruptsCollector() (Collector, error) {
 	return &interruptsCollector{
-		config: config,
+		
 		metric: prometheus.NewCounterVec(
 			prometheus.CounterOpts{
 				Namespace: Namespace,

collector/ipvs.go

@@ -3,6 +3,7 @@
 package collector
 
 import (
+	"flag"
 	"fmt"
 	"strconv"
 
@@ -10,6 +11,10 @@ import (
 	"github.com/prometheus/procfs"
 )
 
+var (
+	ipvsProcfsMountPoint = flag.String("collector.ipvs.procfs", procfs.DefaultMountPoint, "procfs mountpoint.")
+)
+
 type ipvsCollector struct {
 	Collector
 	fs                                                                          procfs.FS
@@ -23,11 +28,11 @@ 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(config Config) (Collector, error) {
-	return newIPVSCollector(config)
+func NewIPVSCollector() (Collector, error) {
+	return newIPVSCollector()
 }
 
-func newIPVSCollector(config Config) (*ipvsCollector, error) {
+func newIPVSCollector() (*ipvsCollector, error) {
 	var (
 		ipvsBackendLabelNames = []string{
 			"local_address",
@@ -37,23 +42,14 @@ func newIPVSCollector(config Config) (*ipvsCollector, error) {
 			"proto",
 		}
 		c         ipvsCollector
-		subsystem string
 		err       error
+		subsystem = "ipvs"
 	)
 
-	if p, ok := config.Config["procfs"]; !ok {
-		c.fs, err = procfs.NewFS(procfs.DefaultMountPoint)
-	} else {
-		c.fs, err = procfs.NewFS(p)
-	}
+	c.fs, err = procfs.NewFS(*ipvsProcfsMountPoint)
 	if err != nil {
 		return nil, err
 	}
-	if s, ok := config.Config["ipvs_subsystem"]; ok {
-		subsystem = s
-	} else {
-		subsystem = "ipvs"
-	}
 
 	c.connections = prometheus.NewCounter(
 		prometheus.CounterOpts{

collector/ipvs_test.go

@@ -1,6 +1,7 @@
 package collector
 
 import (
+	"flag"
 	"io/ioutil"
 	"net"
 	"net/http"
@@ -106,7 +107,10 @@ var (
 )
 
 func TestIPVSCollector(t *testing.T) {
-	collector, err := newIPVSCollector(Config{Config: map[string]string{"procfs": "fixtures"}})
+	if err := flag.Set("collector.ipvs.procfs", "fixtures"); err != nil {
+		t.Fatal(err)
+	}
+	collector, err := newIPVSCollector()
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -165,7 +169,10 @@ func (c miniCollector) Describe(ch chan<- *prometheus.Desc) {
 }
 
 func TestIPVSCollectorResponse(t *testing.T) {
-	collector, err := NewIPVSCollector(Config{Config: map[string]string{"procfs": "fixtures"}})
+	if err := flag.Set("collector.ipvs.procfs", "fixtures"); err != nil {
+		t.Fatal(err)
+	}
+	collector, err := NewIPVSCollector()
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -183,6 +190,7 @@ func TestIPVSCollectorResponse(t *testing.T) {
 	wantLines := strings.Split(string(wantMetrics), "\n")
 	gotLines := strings.Split(string(rw.Body.String()), "\n")
 	gotLinesIdx := 0
+	t.Log(gotLines)
 
 	// Until the Prometheus Go client library offers better testability
 	// (https://github.com/prometheus/client_golang/issues/58), we simply compare

collector/lastlogin.go

@@ -17,7 +17,7 @@ import (
 const lastLoginSubsystem = "last_login"
 
 type lastLoginCollector struct {
-	config Config
+	
 	metric prometheus.Gauge
 }
 
@@ -25,11 +25,11 @@ func init() {
 	Factories["lastlogin"] = NewLastLoginCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a 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) (Collector, error) {
+func NewLastLoginCollector() (Collector, error) {
 	return &lastLoginCollector{
-		config: config,
+		
 		metric: prometheus.NewGauge(prometheus.GaugeOpts{
 			Namespace: Namespace,
 			Subsystem: lastLoginSubsystem,

collector/loadavg.go

@@ -17,7 +17,7 @@ const (
 )
 
 type loadavgCollector struct {
-	config Config
+	
 	metric prometheus.Gauge
 }
 
@@ -25,11 +25,11 @@ func init() {
 	Factories["loadavg"] = NewLoadavgCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a 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) (Collector, error) {
+func NewLoadavgCollector() (Collector, error) {
 	return &loadavgCollector{
-		config: config,
+		
 		metric: prometheus.NewGauge(prometheus.GaugeOpts{
 			Namespace: Namespace,
 			Name:      "load1",

collector/megacli.go

@@ -4,6 +4,7 @@ package collector
 
 import (
 	"bufio"
+	"flag"
 	"io"
 	"os/exec"
 	"strconv"
@@ -17,9 +18,12 @@ const (
 	adapterHeaderSep = "================"
 )
 
+var (
+	megacliCommand = flag.String("collector.megacli.command", defaultMegaCli, "Command to run megacli.")
+)
+
 type megaCliCollector struct {
-	config Config
-	cli    string
+	cli string
 
 	driveTemperature *prometheus.GaugeVec
 	driveCounters    *prometheus.CounterVec
@@ -30,17 +34,12 @@ func init() {
 	Factories["megacli"] = NewMegaCliCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // RAID status through megacli.
-func NewMegaCliCollector(config Config) (Collector, error) {
-	cli := defaultMegaCli
-	if config.Config["megacli_command"] != "" {
-		cli = config.Config["megacli_command"]
-	}
-
+func NewMegaCliCollector() (Collector, error) {
 	return &megaCliCollector{
-		config: config,
-		cli:    cli,
+		
+		cli:    *megacliCommand,
 		driveTemperature: prometheus.NewGaugeVec(prometheus.GaugeOpts{
 			Namespace: Namespace,
 			Name:      "megacli_drive_temperature_celsius",

collector/meminfo.go

@@ -21,7 +21,7 @@ const (
 )
 
 type meminfoCollector struct {
-	config  Config
+	
 	metrics map[string]prometheus.Gauge
 }
 
@@ -29,11 +29,10 @@ func init() {
 	Factories["meminfo"] = NewMeminfoCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // memory stats.
-func NewMeminfoCollector(config Config) (Collector, error) {
+func NewMeminfoCollector() (Collector, error) {
 	return &meminfoCollector{
-		config:  config,
 		metrics: map[string]prometheus.Gauge{},
 	}, nil
 }

collector/netdev.go

@@ -19,7 +19,7 @@ const (
 )
 
 type netDevCollector struct {
-	config  Config
+	
 	metrics map[string]*prometheus.GaugeVec
 }
 
@@ -27,11 +27,10 @@ func init() {
 	Factories["netdev"] = NewNetDevCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // network device stats.
-func NewNetDevCollector(config Config) (Collector, error) {
+func NewNetDevCollector() (Collector, error) {
 	return &netDevCollector{
-		config:  config,
 		metrics: map[string]*prometheus.GaugeVec{},
 	}, nil
 }

collector/netstat.go

@@ -19,7 +19,7 @@ const (
 )
 
 type netStatCollector struct {
-	config  Config
+	
 	metrics map[string]prometheus.Gauge
 }
 
@@ -27,11 +27,10 @@ func init() {
 	Factories["netstat"] = NewNetStatCollector
 }
 
-// NewNetStatCollector takes a config struct and returns
+// NewNetStatCollector takes a returns
 // a new Collector exposing network stats.
-func NewNetStatCollector(config Config) (Collector, error) {
+func NewNetStatCollector() (Collector, error) {
 	return &netStatCollector{
-		config:  config,
 		metrics: map[string]prometheus.Gauge{},
 	}, nil
 }

collector/ntp.go

@@ -24,9 +24,9 @@ func init() {
 	Factories["ntp"] = NewNtpCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // the offset between ntp and the current system time.
-func NewNtpCollector(config Config) (Collector, error) {
+func NewNtpCollector() (Collector, error) {
 	if *ntpServer == "" {
 		return nil, fmt.Errorf("No NTP server specifies, see --ntpServer")
 	}

collector/runit.go

@@ -9,7 +9,7 @@ import (
 )
 
 type runitCollector struct {
-	config Config
+	
 
 	state, stateDesired, stateNormal *prometheus.GaugeVec
 }
@@ -18,7 +18,7 @@ func init() {
 	Factories["runit"] = NewRunitCollector
 }
 
-func NewRunitCollector(config Config) (Collector, error) {
+func NewRunitCollector() (Collector, error) {
 	var (
 		subsystem   = "service"
 		constLabels = prometheus.Labels{"supervisor": "runit"}
@@ -26,7 +26,7 @@ func NewRunitCollector(config Config) (Collector, error) {
 	)
 
 	return &runitCollector{
-		config: config,
+		
 		state: prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{
 				Namespace:   Namespace,

collector/stat.go

@@ -17,7 +17,7 @@ const (
 )
 
 type statCollector struct {
-	config       Config
+	
 	cpu          *prometheus.CounterVec
 	intr         prometheus.Counter
 	ctxt         prometheus.Counter
@@ -31,11 +31,11 @@ func init() {
 	Factories["stat"] = NewStatCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // network device stats.
-func NewStatCollector(config Config) (Collector, error) {
+func NewStatCollector() (Collector, error) {
 	return &statCollector{
-		config: config,
+		
 		cpu: prometheus.NewCounterVec(
 			prometheus.CounterOpts{
 				Namespace: Namespace,

collector/tcpstat.go

@@ -35,7 +35,7 @@ const (
 )
 
 type tcpStatCollector struct {
-	config Config
+	
 	metric *prometheus.GaugeVec
 }
 
@@ -43,11 +43,11 @@ func init() {
 	Factories["tcpstat"] = NewTCPStatCollector
 }
 
-// NewTCPStatCollector takes a config struct and returns
+// NewTCPStatCollector takes a returns
 // a new Collector exposing network stats.
-func NewTCPStatCollector(config Config) (Collector, error) {
+func NewTCPStatCollector() (Collector, error) {
 	return &tcpStatCollector{
-		config: config,
+		
 		metric: prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{
 				Namespace: Namespace,

collector/textfile.go

@@ -31,9 +31,9 @@ func init() {
 	Factories["textfile"] = NewTextFileCollector
 }
 
-// Takes a config struct and registers a
+// Takes a registers a
 // SetMetricFamilyInjectionHook.
-func NewTextFileCollector(config Config) (Collector, error) {
+func NewTextFileCollector() (Collector, error) {
 	if *textFileDirectory == "" {
 		// This collector is enabled by default, so do not fail if
 		// the flag is not passed.

collector/time.go

@@ -10,7 +10,7 @@ import (
 )
 
 type timeCollector struct {
-	config Config
+	
 	metric prometheus.Counter
 }
 
@@ -18,11 +18,11 @@ func init() {
 	Factories["time"] = NewTimeCollector
 }
 
-// Takes a config struct and prometheus registry and returns a new Collector exposing
+// Takes a prometheus registry and returns a new Collector exposing
 // the current system time in seconds since epoch.
-func NewTimeCollector(config Config) (Collector, error) {
+func NewTimeCollector() (Collector, error) {
 	return &timeCollector{
-		config: config,
+		
 		metric: prometheus.NewCounter(prometheus.CounterOpts{
 			Namespace: Namespace,
 			Name:      "time",

node_exporter.go

@@ -1,10 +1,8 @@
 package main
 
 import (
-	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	_ "net/http/pprof"
 	"os"
@@ -26,11 +24,10 @@ var (
 	// set at build time
 	Version = "0.0.0.dev"
 
-	configFile        = flag.String("config.file", "", "Path to config file.")
 	memProfile        = flag.String("debug.memprofile-file", "", "Write memory profile to this file upon receipt of SIGUSR1.")
 	listenAddress     = flag.String("web.listen-address", ":9100", "Address on which to expose metrics and web interface.")
 	metricsPath       = flag.String("web.telemetry-path", "/metrics", "Path under which to expose metrics.")
-	enabledCollectors = flag.String("collectors.enabled", "attributes,diskstats,filesystem,loadavg,meminfo,stat,textfile,time,netdev,netstat", "Comma-separated list of collectors to use.")
+	enabledCollectors = flag.String("collectors.enabled", "diskstats,filesystem,loadavg,meminfo,stat,textfile,time,netdev,netstat", "Comma-separated list of collectors to use.")
 	printCollectors   = flag.Bool("collectors.print", false, "If true, print available collectors and exit.")
 	authUser          = flag.String("auth.user", "", "Username for basic auth.")
 	authPass          = flag.String("auth.pass", "", "Password for basic auth.")
@@ -105,32 +102,14 @@ func Execute(name string, c collector.Collector, ch chan<- prometheus.Metric) {
 	scrapeDurations.WithLabelValues(name, result).Observe(duration.Seconds())
 }
 
-func getConfig(file string) (*collector.Config, error) {
-	config := &collector.Config{}
-	glog.Infof("Reading config %s", *configFile)
-	bytes, err := ioutil.ReadFile(*configFile)
-	if err != nil {
-		return nil, err
-	}
-	return config, json.Unmarshal(bytes, &config)
-}
-
-func loadCollectors(file string) (map[string]collector.Collector, error) {
+func loadCollectors() (map[string]collector.Collector, error) {
 	collectors := map[string]collector.Collector{}
-	config := &collector.Config{}
-	if file != "" {
-		var err error
-		config, err = getConfig(file)
-		if err != nil {
-			return nil, fmt.Errorf("couldn't read config %s: %s", file, err)
-		}
-	}
 	for _, name := range strings.Split(*enabledCollectors, ",") {
 		fn, ok := collector.Factories[name]
 		if !ok {
 			return nil, fmt.Errorf("collector '%s' not available", name)
 		}
-		c, err := fn(*config)
+		c, err := fn()
 		if err != nil {
 			return nil, err
 		}
@@ -154,9 +133,9 @@ func main() {
 		}
 		return
 	}
-	collectors, err := loadCollectors(*configFile)
+	collectors, err := loadCollectors()
 	if err != nil {
-		glog.Fatalf("Couldn't load config and collectors: %s", err)
+		glog.Fatalf("Couldn't load collectors: %s", err)
 	}
 
 	glog.Infof("Enabled collectors:")