collector: add openbsd support for netdev

collector/netdev_common.go

@@ -0,0 +1,80 @@
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !nonetdev
+// +build linux freebsd openbsd
+
+package collector
+
+import (
+	"flag"
+	"fmt"
+	"regexp"
+	"strconv"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+var (
+	netdevIgnoredDevices = flag.String(
+		"collector.netdev.ignored-devices", "^$",
+		"Regexp of net devices to ignore for netdev collector.")
+)
+
+type netDevCollector struct {
+	subsystem             string
+	ignoredDevicesPattern *regexp.Regexp
+	metricDescs           map[string]*prometheus.Desc
+}
+
+func init() {
+	Factories["netdev"] = NewNetDevCollector
+}
+
+// NewNetDevCollector returns a new Collector exposing network device stats.
+func NewNetDevCollector() (Collector, error) {
+	pattern := regexp.MustCompile(*netdevIgnoredDevices)
+	return &netDevCollector{
+		subsystem:             "network",
+		ignoredDevicesPattern: pattern,
+		metricDescs:           map[string]*prometheus.Desc{},
+	}, nil
+}
+
+func (c *netDevCollector) Update(ch chan<- prometheus.Metric) (err error) {
+	netDev, err := getNetDevStats(c.ignoredDevicesPattern)
+	if err != nil {
+		return fmt.Errorf("couldn't get netstats: %s", err)
+	}
+	for dev, devStats := range netDev {
+		for key, value := range devStats {
+			desc, ok := c.metricDescs[key]
+			if !ok {
+				desc = prometheus.NewDesc(
+					prometheus.BuildFQName(Namespace, c.subsystem, key),
+					fmt.Sprintf("Network device statistic %s.", key),
+					[]string{"device"},
+					nil,
+				)
+				c.metricDescs[key] = desc
+			}
+			v, err := strconv.ParseFloat(value, 64)
+			if err != nil {
+				return fmt.Errorf("invalid value %s in netstats: %s", value, err)
+			}
+			ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, v, dev)
+		}
+	}
+	return nil
+}
+