Collector-specific configuration. LIKWID collector derives metrics itself, Run once CLI option

collectors/netstatMetric.go

@@ -7,27 +7,36 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"encoding/json"
 )
 
 const NETSTATFILE = `/proc/net/dev`
 
-type NetstatCollector struct {
-	MetricCollector
-	matches map[int]string
-	tags    map[string]string
+type NetstatCollectorConfig struct {
+    ExcludeDevices []string                 `json:"exclude_devices, omitempty"`
 }
 
-func (m *NetstatCollector) Init() error {
+type NetstatCollector struct {
+	MetricCollector
+	config NetstatCollectorConfig
+	matches map[int]string
+}
+
+func (m *NetstatCollector) Init(config []byte) error {
 	m.name = "NetstatCollector"
 	m.setup()
-	m.tags = map[string]string{"type": "node"}
 	m.matches = map[int]string{
 		1:  "bytes_in",
 		9:  "bytes_out",
 		2:  "pkts_in",
 		10: "pkts_out",
 	}
-	_, err := ioutil.ReadFile(string(NETSTATFILE))
+	err := json.Unmarshal(config, &m.config)
+	if err != nil {
+	    log.Print(err.Error())
+	    return err
+	}
+	_, err = ioutil.ReadFile(string(NETSTATFILE))
 	if err == nil {
 		m.init = true
 	}
@@ -48,13 +57,20 @@ func (m *NetstatCollector) Read(interval time.Duration, out *[]lp.MutableMetric)
 		}
 		f := strings.Fields(l)
 		dev := f[0][0 : len(f[0])-1]
-		if dev == "lo" {
+		cont := false
+		for _, d := range m.config.ExcludeDevices {
+		    if d == dev {
+		        cont = true
+		    }
+		}
+		if cont {
 			continue
 		}
+		tags := map[string]string{"device" : dev, "type": "node"}
 		for i, name := range m.matches {
 			v, err := strconv.ParseInt(f[i], 10, 0)
 			if err == nil {
-				y, err := lp.New(name, m.tags, map[string]interface{}{"value": int(float64(v) * 1.0e-3)}, time.Now())
+				y, err := lp.New(name, tags, map[string]interface{}{"value": int(float64(v) * 1.0e-3)}, time.Now())
 				if err == nil {
 					*out = append(*out, y)
 				}