func (vs *VirtualServer) SendToQueue(f interface{}, args ...interface{}) error {
rnd, err := rand.Chars(10, rand.NumberLetters, "go")
if err != nil {
return e.Forward(err)
}
job := job.NewSimple(vs.VirtualServerName+rnd, vs.Prio, f, args...)
vs.status.Log(status.Verbose, "Add job %v for %v to queue %v.", job.Name(), vs.VirtualServerName, vs.Prio)
err = vs.Queue.Add(job)
if err != nil {
return e.Forward(err)
}
vs.status.Log(status.Verbose, "Waiting job %v return.", job.Name())
job.Returns(&err)
if err != nil {
return e.Forward(err)
}
vs.status.Log(status.Verbose, "Job %v returned.", job.Name())
return nil
}
func (d *Daemon) monitor() {
go func() {
d.monitoring = true
var tries int
unmonitor := true
F:
for {
select {
case <-time.After(d.Sleep):
if d.Tries != 0 && tries > d.Tries+1 {
d.monitoring = false
if unmonitor {
d.status.LogAndEmail(status.Normal, "", "Unmonitor daemon %v.", d.DaemonName)
unmonitor = false
continue F
}
continue F
}
d.changePid()
if d.pid == -1 {
d.status.LogAndEmail(status.Normal, "", "No pid file %v for %v.", d.PidFile, d.DaemonName)
d.running = false
} else {
err := syscall.Kill(d.pid, 0)
if err != nil && err.Error() == "no such process" {
d.status.LogAndEmail(status.Normal, "", "%v process is gone.", d.DaemonName)
d.running = false
} else if err != nil {
d.status.Log(status.Verbose, "Monitor failed for %v with error: %v", d.DaemonName, e.Trace(e.New(err)))
d.running = false
} else {
d.running = true
}
}
if d.running {
err := d.ping()
if e.Equal(err, ErrPingFailed) {
d.running = false
} else if err != nil && !e.Equal(err, ErrProtoNotSupported) && !e.Equal(err, ErrUrlIsEmpty) {
d.status.Log(status.Verbose, "Monitor ping failed for %v with error: %v", d.DaemonName, e.Trace(e.Forward(err)))
d.running = false
}
p, err := event.ProbeProcess(d.pid)
if e.Equal(err, "process not found") {
d.status.LogAndEmail(status.Normal, "", "%v process is gone.", d.DaemonName)
d.running = false
} else if err != nil {
d.status.Log(status.Verbose, "ProbeCurrentProcess failed with error: %v", err)
} else {
d.SendEvent(p)
}
}
if !d.running {
tries++
rnd, err := rand.Chars(10, rand.NumberLetters, "go")
if err != nil {
d.status.Log(status.Verbose, "Can't generate the job name for %v. Error: %v", d.DaemonName, e.Trace(e.Forward(err)))
continue
}
job := job.NewSimple(d.DaemonName+rnd, d.Prio, func() error {
err := d.restartProcess()
if err != nil {
d.status.LogAndEmail(status.Normal, "", "Can't restart process %v.", d.DaemonName)
return e.Forward(err)
}
return nil
})
d.status.Log(status.Verbose, "Add job %v for %v to queue %v.", job.Name(), d.DaemonName, d.Prio)
d.Queue.Add(job)
d.status.Log(status.Verbose, "Waiting job %v return.", job.Name())
job.Returns(&err)
if err != nil {
continue
}
d.status.LogAndEmail(status.Normal, "", "Restart command sent to %v.", d.DaemonName)
} else {
d.status.Log(status.Verbose, "%v process is running.", d.DaemonName)
tries = 0
}
case <-d.killMonitor:
d.status.Log(status.Normal, "Monitor %v stopped.", d.DaemonName)
return
}
}
}()
}