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// 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 !nowireguard
// +build linux freebsd openbsd dragonfly darwin
package collector
import (
"strconv"
"time"
"github.com/go-kit/kit/log"
"github.com/prometheus/client_golang/prometheus"
"golang.zx2c4.com/wireguard/wgctrl"
)
func init() {
registerCollector("wireguard", defaultDisabled, NewWireguardCollector)
}
func NewWireguardCollector(logger log.Logger) (Collector, error) {
subsystem := "wireguard"
labels := []string{"name", "peer_key", "local_key", "endpoint", "version"}
wg, err := wgctrl.New()
if err != nil {
return nil, err
}
return &wireguardCollector{
client: wg,
lastHandshakeSeconds: prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "last_handshake_secs"),
"Wireguard last handshake seconds ago",
labels, nil,
),
bytesIn: prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "bytes_in"),
"Wireguard bytes in for connection",
labels, nil,
),
bytesOut: prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "bytes_out"),
"Wireguard bytes out for connection",
labels, nil,
),
}, nil
}
type wireguardCollector struct {
client *wgctrl.Client
lastHandshakeSeconds *prometheus.Desc
bytesIn, bytesOut *prometheus.Desc
}
func (c *wireguardCollector) Update(ch chan<- prometheus.Metric) error {
devs, err := c.client.Devices()
if err != nil {
return err
}
for _, dev := range devs {
for _, peer := range dev.Peers {
labels := []string{
dev.Name,
peer.PublicKey.String(),
dev.PublicKey.String(),
peer.Endpoint.String(),
strconv.Itoa(peer.ProtocolVersion),
}
ch <- prometheus.MustNewConstMetric(
c.bytesIn, prometheus.CounterValue,
float64(peer.ReceiveBytes),
labels...,
)
ch <- prometheus.MustNewConstMetric(
c.bytesOut, prometheus.CounterValue,
float64(peer.TransmitBytes),
labels...,
)
ch <- prometheus.MustNewConstMetric(
c.lastHandshakeSeconds, prometheus.GaugeValue,
float64(time.Now().Sub(peer.LastHandshakeTime).Seconds()),
labels...,
)
}
}
return nil
}
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