Add simpler collectors for load, mem_used and network

collectors/loadavgMetric.go

@@ -0,0 +1,36 @@
+package collectors
+
+import (
+	"io/ioutil"
+	"strconv"
+	"time"
+	"strings"
+)
+
+const LOADAVGFILE = `/proc/loadavg`
+
+type LoadavgCollector struct {
+	MetricCollector
+}
+
+
+func (m *LoadavgCollector) Init() {
+    m.name = "LoadavgCollector"
+	m.setup()
+}
+
+func (m *LoadavgCollector) Read(interval time.Duration){
+	buffer, err := ioutil.ReadFile(string(LOADAVGFILE))
+
+	if err != nil {
+		return
+	}
+
+	ls := strings.Split(string(buffer), ` `)
+	loadOne, _ := strconv.ParseFloat(ls[0], 64)
+	m.node["load_one"] = float64(loadOne)
+}
+
+func (m *LoadavgCollector) Close() {
+    return
+}