You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.7 KiB
62 lines
1.7 KiB
// Copyright 2020 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 !noboottime
|
|
|
|
package collector
|
|
|
|
import (
|
|
"github.com/go-kit/kit/log"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"golang.org/x/sys/unix"
|
|
"unsafe"
|
|
)
|
|
|
|
type bootTimeCollector struct {
|
|
name, description string
|
|
logger log.Logger
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("boottime", defaultEnabled, newBootTimeCollector)
|
|
}
|
|
|
|
// newBootTimeCollector returns a new Collector exposing system boot time on BSD systems.
|
|
func newBootTimeCollector(logger log.Logger) (Collector, error) {
|
|
return &bootTimeCollector{
|
|
name: "boot_time_seconds",
|
|
description: "Unix time of last boot, including microseconds.",
|
|
logger: logger,
|
|
}, nil
|
|
}
|
|
|
|
// Update pushes boot time onto ch
|
|
func (c *bootTimeCollector) Update(ch chan<- prometheus.Metric) error {
|
|
raw, err := unix.SysctlRaw("kern.boottime")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
tv := *(*unix.Timeval)(unsafe.Pointer(&raw[0]))
|
|
v := (float64(tv.Sec) + (float64(tv.Usec) / float64(1000*1000)))
|
|
|
|
ch <- prometheus.MustNewConstMetric(
|
|
prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, "", c.name),
|
|
c.description,
|
|
nil, nil,
|
|
), prometheus.GaugeValue, v)
|
|
|
|
return nil
|
|
}
|