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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.
//go:build !notime
// +build !notime
package collector
import (
"log/slog"
"time"
"github.com/prometheus/client_golang/prometheus"
)
type timeCollector struct {
now typedDesc
zone typedDesc
clocksourcesAvailable typedDesc
clocksourceCurrent typedDesc
logger *slog.Logger
}
func init() {
registerCollector("time", defaultEnabled, NewTimeCollector)
}
// NewTimeCollector returns a new Collector exposing the current system time in
// seconds since epoch.
func NewTimeCollector(logger *slog.Logger) (Collector, error) {
const subsystem = "time"
return &timeCollector{
now: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "seconds"),
"System time in seconds since epoch (1970).",
nil, nil,
), prometheus.GaugeValue},
zone: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "zone_offset_seconds"),
"System time zone offset in seconds.",
[]string{"time_zone"}, nil,
), prometheus.GaugeValue},
clocksourcesAvailable: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "clocksource_available_info"),
"Available clocksources read from '/sys/devices/system/clocksource'.",
[]string{"device", "clocksource"}, nil,
), prometheus.GaugeValue},
clocksourceCurrent: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "clocksource_current_info"),
"Current clocksource read from '/sys/devices/system/clocksource'.",
[]string{"device", "clocksource"}, nil,
), prometheus.GaugeValue},
logger: logger,
}, nil
}
func (c *timeCollector) Update(ch chan<- prometheus.Metric) error {
now := time.Now()
nowSec := float64(now.UnixNano()) / 1e9
zone, zoneOffset := now.Zone()
c.logger.Debug("Return time", "now", nowSec)
ch <- c.now.mustNewConstMetric(nowSec)
c.logger.Debug("Zone offset", "offset", zoneOffset, "time_zone", zone)
ch <- c.zone.mustNewConstMetric(float64(zoneOffset), zone)
return c.update(ch)
}
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