1 // Copyright 2022 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package metrics 16 17 import ( 18 "context" 19 "os" 20 21 "github.com/prometheus/procfs" 22 "go.opencensus.io/stats" 23 ) 24 25 func RecordProcessStartTime() error { 26 p, err := procfs.NewProc(os.Getpid()) 27 if err != nil { 28 return err 29 } 30 stat, err := p.NewStat() 31 if err != nil { 32 return err 33 } 34 startTime, err := stat.StartTime() 35 if err != nil { 36 return err 37 } 38 stats.Record(context.Background(), MProcessStartTime.M(startTime)) 39 return nil 40 } 41