forked from github/multus-cni
ae4a28b689
Multus community decide that multus support the Kubernetes that Kubernetes community supports, so changed vendor code to the oldest version of currently supported.
68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
/*
|
|
Copyright 2019 The Kubernetes 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.
|
|
*/
|
|
|
|
package metrics
|
|
|
|
import (
|
|
"os"
|
|
"time"
|
|
|
|
"github.com/prometheus/procfs"
|
|
|
|
"k8s.io/klog/v2"
|
|
)
|
|
|
|
var processStartTime = NewGaugeVec(
|
|
&GaugeOpts{
|
|
Name: "process_start_time_seconds",
|
|
Help: "Start time of the process since unix epoch in seconds.",
|
|
StabilityLevel: ALPHA,
|
|
},
|
|
[]string{},
|
|
)
|
|
|
|
// RegisterProcessStartTime registers the process_start_time_seconds to
|
|
// a prometheus registry. This metric needs to be included to ensure counter
|
|
// data fidelity.
|
|
func RegisterProcessStartTime(registrationFunc func(Registerable) error) error {
|
|
start, err := getProcessStart()
|
|
if err != nil {
|
|
klog.Errorf("Could not get process start time, %v", err)
|
|
start = float64(time.Now().Unix())
|
|
}
|
|
// processStartTime is a lazy metric which only get initialized after registered.
|
|
// so we have to explicitly create it before setting the label value. Otherwise
|
|
// it is a noop.
|
|
if !processStartTime.IsCreated() {
|
|
processStartTime.initializeMetric()
|
|
}
|
|
processStartTime.WithLabelValues().Set(start)
|
|
return registrationFunc(processStartTime)
|
|
}
|
|
|
|
func getProcessStart() (float64, error) {
|
|
pid := os.Getpid()
|
|
p, err := procfs.NewProc(pid)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
if stat, err := p.Stat(); err == nil {
|
|
return stat.StartTime()
|
|
}
|
|
return 0, err
|
|
}
|