mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-23 12:30:46 +01:00
922e74d58f
Named return variables should only be used to describe the returned type further, e.g. `err error` doesn't add any new information and is just stutter.
79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
// 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 !nontp
|
|
|
|
package collector
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
|
|
"github.com/beevik/ntp"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/common/log"
|
|
)
|
|
|
|
var (
|
|
ntpServer = flag.String("collector.ntp.server", "", "NTP server to use for ntp collector.")
|
|
ntpProtocolVersion = flag.Int("collector.ntp.protocol-version", 4, "NTP protocol version")
|
|
)
|
|
|
|
type ntpCollector struct {
|
|
drift, stratum typedDesc
|
|
}
|
|
|
|
func init() {
|
|
Factories["ntp"] = NewNtpCollector
|
|
}
|
|
|
|
// NewNtpCollector returns a new Collector exposing the offset between ntp and
|
|
// the current system time.
|
|
func NewNtpCollector() (Collector, error) {
|
|
warnDeprecated("ntp")
|
|
if *ntpServer == "" {
|
|
return nil, fmt.Errorf("no NTP server specified, see -collector.ntp.server")
|
|
}
|
|
if *ntpProtocolVersion < 2 || *ntpProtocolVersion > 4 {
|
|
return nil, fmt.Errorf("invalid NTP protocol version %d; must be 2, 3, or 4", *ntpProtocolVersion)
|
|
}
|
|
|
|
return &ntpCollector{
|
|
drift: typedDesc{prometheus.NewDesc(
|
|
prometheus.BuildFQName(Namespace, "ntp", "drift_seconds"),
|
|
"Time between system time and ntp time.",
|
|
nil, nil,
|
|
), prometheus.GaugeValue},
|
|
stratum: typedDesc{prometheus.NewDesc(
|
|
prometheus.BuildFQName(Namespace, "ntp", "stratum"),
|
|
"NTP server stratum.",
|
|
nil, nil,
|
|
), prometheus.GaugeValue},
|
|
}, nil
|
|
}
|
|
|
|
func (c *ntpCollector) Update(ch chan<- prometheus.Metric) error {
|
|
resp, err := ntp.Query(*ntpServer, *ntpProtocolVersion)
|
|
if err != nil {
|
|
return fmt.Errorf("couldn't get NTP drift: %s", err)
|
|
}
|
|
driftSeconds := resp.ClockOffset.Seconds()
|
|
log.Debugf("Set ntp_drift_seconds: %f", driftSeconds)
|
|
ch <- c.drift.mustNewConstMetric(driftSeconds)
|
|
|
|
stratum := float64(resp.Stratum)
|
|
log.Debugf("Set ntp_stratum: %f", stratum)
|
|
ch <- c.stratum.mustNewConstMetric(stratum)
|
|
return nil
|
|
}
|