mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-23 20:36:21 +01:00
67 lines
2.0 KiB
Go
67 lines
2.0 KiB
Go
// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build !notime
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// +build !notime
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package collector
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import (
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"time"
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"github.com/go-kit/log"
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"github.com/go-kit/log/level"
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"github.com/prometheus/client_golang/prometheus"
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)
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type timeCollector struct {
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nowDesc *prometheus.Desc
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zoneDesc *prometheus.Desc
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logger log.Logger
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}
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func init() {
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registerCollector("time", defaultEnabled, NewTimeCollector)
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}
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// NewTimeCollector returns a new Collector exposing the current system time in
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// seconds since epoch.
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func NewTimeCollector(logger log.Logger) (Collector, error) {
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const subsystem = "time"
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return &timeCollector{
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nowDesc: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, subsystem, "seconds"),
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"System time in seconds since epoch (1970).",
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nil, nil,
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),
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zoneDesc: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, subsystem, "zone_offset_seconds"),
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"System time zone offset in seconds.",
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[]string{"time_zone"}, nil,
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),
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logger: logger,
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}, nil
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}
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func (c *timeCollector) Update(ch chan<- prometheus.Metric) error {
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now := time.Now()
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nowSec := float64(now.UnixNano()) / 1e9
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zone, zoneOffset := now.Zone()
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level.Debug(c.logger).Log("msg", "Return time", "now", nowSec)
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ch <- prometheus.MustNewConstMetric(c.nowDesc, prometheus.GaugeValue, nowSec)
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level.Debug(c.logger).Log("msg", "Zone offset", "offset", zoneOffset, "time_zone", zone)
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ch <- prometheus.MustNewConstMetric(c.zoneDesc, prometheus.GaugeValue, float64(zoneOffset), zone)
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return nil
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}
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