squash merge from dev branch

exporter/device.go

@@ -0,0 +1,81 @@
+package exporter
+
+import (
+	"go.uber.org/zap"
+	"gopkg.in/routeros.v2"
+	"strconv"
+	"strings"
+)
+
+const (
+	apiPort = ":8728"
+)
+
+type Device struct {
+	Address  string
+	Name     string
+	User     string
+	Password string
+}
+
+func (d *Device) fetchInterfaceMetrics(c *routeros.Client, m PromMetrics, l *zap.SugaredLogger) error {
+	l.Debugw("fetching interface metrics",
+		"device", d.Name,
+	)
+
+	reply, err := c.Run("/interface/print", "?disabled=false",
+		"?running=true", "=.proplist="+strings.Join(InterfaceProps, ","))
+	if err != nil {
+		return err
+	}
+
+	for _, re := range reply.Re {
+		var name string
+		// name should always be first element on the array
+		for _, p := range InterfaceProps {
+			if p == "name" {
+				name = re.Map[p]
+			} else {
+				v, err := strconv.ParseFloat(re.Map[p], 64)
+				if err != nil {
+					l.Errorw("error parsing value to float",
+						"device", d.Name,
+						"property", p,
+						"value", re.Map[p],
+						"error", err,
+					)
+				}
+				m.IncrementInterface(p, d.Name, d.Address, name, v)
+			}
+		}
+	}
+
+	l.Debugw("done fetching interface metrics",
+		"device", d.Name,
+	)
+
+	return nil
+}
+
+func (d *Device) CollectMetrics(p PromMetrics, l *zap.SugaredLogger) error {
+
+	c, err := routeros.Dial(d.Address+apiPort, d.User, d.Password)
+	if err != nil {
+		l.Errorw("error dialing device",
+			"device", d.Name,
+			"error", err,
+		)
+		return err
+	}
+	defer c.Close()
+
+	if err := d.fetchInterfaceMetrics(c, p, l); err != nil {
+		l.Errorw("error fetching interface metrics",
+			"device", d.Name,
+			"error", err,
+		)
+		return err
+	}
+
+	return nil
+}