I have a pod.yaml, I want to retrieve a new annotation integer value, to make a sleep. So I used Go to fetch the integer after the name : new-anno. With this value, I want to return a function to make time.Sleep(SleepFunct * timeSecond) on main Part

apiVersion: v1
kind: Pod
metadata:
  name: ubuntu
  annotations:
  new-anno/sleep: "5"

my handler.go

package main      

import (
    "strings"
    "time"
    "strconv"
    "github.com/avast/retry-go"
    log "github.com/sirupsen/logrus"
    core_v1 "k8s.io/api/core/v1"
    "k8s.io/client-go/tools/clientcmd"
    set "github.com/deckarep/golang-set"
) 

type SidecarShutdownHandler struct{}

func (t *SidecarShutdownHandler) Init() error {
        log.Info("SidecarShutdownHandler.Init")
        return nil
}  


func (t *SidecarShutdownHandler) SleepFunct(obj interface{}) int{

    pod := obj.(*core_v1.Pod)
    sleepString, exists := pod.Annotations["new-anno/sleep"]

    if exists {
            log.Debugf("    ResourceTrackable: true")
            log.Infof("    sleep: %s", sleepString)
    } else {
            return
    }

    res := strings.Split(sleepString, ",")
    i, err := strconv.Atoi(s)
    if err != nil {
        panic(err)
    }
    return i

}

But I got an error:

 8.504 ./handler.go:92:17: not enough return values                                                                                                                                                                  8.504   have ()                                                                                                                                                                                                     
 8.504   want (int)
 8.504 ./handler.go:96:32: cannot use res (variable of type []string) as string value in argument to strconv.Atoi