func main() {
flag.Parse()
if *showVersion {
fmt.Fprintln(os.Stdout, version.Print("alertmanager"))
os.Exit(0)
}
log.Infoln("Starting alertmanager", version.Info())
log.Infoln("Build context", version.BuildContext())
err := os.MkdirAll(*dataDir, 0777)
if err != nil {
log.Fatal(err)
}
marker := types.NewMarker()
alerts, err := boltmem.NewAlerts(*dataDir)
if err != nil {
log.Fatal(err)
}
defer alerts.Close()
notifies, err := boltmem.NewNotificationInfo(*dataDir)
if err != nil {
log.Fatal(err)
}
defer notifies.Close()
silences, err := boltmem.NewSilences(*dataDir, marker)
if err != nil {
log.Fatal(err)
}
defer silences.Close()
var (
inhibitor *Inhibitor
tmpl *template.Template
disp *Dispatcher
)
defer disp.Stop()
api := NewAPI(alerts, silences, func() AlertOverview {
return disp.Groups()
})
build := func(rcvs []*config.Receiver) notify.Notifier {
var (
router = notify.Router{}
fanouts = notify.Build(rcvs, tmpl)
)
for name, fo := range fanouts {
for i, n := range fo {
n = notify.Retry(n)
n = notify.Log(n, log.With("step", "retry"))
n = notify.Dedup(notifies, n)
n = notify.Log(n, log.With("step", "dedup"))
fo[i] = n
}
router[name] = fo
}
n := notify.Notifier(router)
n = notify.Log(n, log.With("step", "route"))
n = notify.Silence(silences, n, marker)
n = notify.Log(n, log.With("step", "silence"))
n = notify.Inhibit(inhibitor, n, marker)
n = notify.Log(n, log.With("step", "inhibit"))
return n
}
amURL, err := extURL(*externalURL)
if err != nil {
log.Fatal(err)
}
reload := func() (err error) {
log.With("file", *configFile).Infof("Loading configuration file")
defer func() {
if err != nil {
log.With("file", *configFile).Errorf("Loading configuration file failed: %s", err)
configSuccess.Set(0)
} else {
configSuccess.Set(1)
configSuccessTime.Set(float64(time.Now().Unix()))
}
}()
conf, err := config.LoadFile(*configFile)
if err != nil {
return err
}
api.Update(conf.String(), time.Duration(conf.Global.ResolveTimeout))
tmpl, err = template.FromGlobs(conf.Templates...)
if err != nil {
return err
}
tmpl.ExternalURL = amURL
inhibitor.Stop()
disp.Stop()
inhibitor = NewInhibitor(alerts, conf.InhibitRules, marker)
disp = NewDispatcher(alerts, NewRoute(conf.Route, nil), build(conf.Receivers), marker)
go disp.Run()
go inhibitor.Run()
return nil
}
if err := reload(); err != nil {
os.Exit(1)
}
router := route.New()
webReload := make(chan struct{})
RegisterWeb(router.WithPrefix(amURL.Path), webReload)
api.Register(router.WithPrefix(path.Join(amURL.Path, "/api")))
log.Infoln("Listening on", *listenAddress)
go listen(router)
var (
hup = make(chan os.Signal)
hupReady = make(chan bool)
term = make(chan os.Signal)
)
signal.Notify(hup, syscall.SIGHUP)
signal.Notify(term, os.Interrupt, syscall.SIGTERM)
go func() {
<-hupReady
for {
select {
case <-hup:
case <-webReload:
}
reload()
}
}()
// Wait for reload or termination signals.
close(hupReady) // Unblock SIGHUP handler.
<-term
log.Infoln("Received SIGTERM, exiting gracefully...")
}
func main() {
flag.Parse()
printVersion()
if *showVersion {
os.Exit(0)
}
err := os.MkdirAll(*dataDir, 0777)
if err != nil {
log.Fatal(err)
}
db, err := sql.Open("sqlite3", filepath.Join(*dataDir, "am.db"))
if err != nil {
log.Fatal(err)
}
defer db.Close()
marker := types.NewMarker()
alerts, err := sqlite.NewAlerts(db)
if err != nil {
log.Fatal(err)
}
notifies, err := sqlite.NewNotifies(db)
if err != nil {
log.Fatal(err)
}
silences, err := sqlite.NewSilences(db, marker)
if err != nil {
log.Fatal(err)
}
var (
inhibitor *Inhibitor
tmpl *template.Template
disp *Dispatcher
)
defer disp.Stop()
api := NewAPI(alerts, silences, func() AlertOverview {
return disp.Groups()
})
build := func(rcvs []*config.Receiver) notify.Notifier {
var (
router = notify.Router{}
fanouts = notify.Build(rcvs, tmpl)
)
for name, fo := range fanouts {
for i, n := range fo {
n = notify.Retry(n)
n = notify.Log(n, log.With("step", "retry"))
n = notify.Dedup(notifies, n)
n = notify.Log(n, log.With("step", "dedup"))
fo[i] = n
}
router[name] = fo
}
n := notify.Notifier(router)
n = notify.Log(n, log.With("step", "route"))
n = notify.Silence(silences, n, marker)
n = notify.Log(n, log.With("step", "silence"))
n = notify.Inhibit(inhibitor, n, marker)
n = notify.Log(n, log.With("step", "inhibit"))
return n
}
reload := func() (err error) {
log.With("file", *configFile).Infof("Loading configuration file")
defer func() {
if err != nil {
log.With("file", *configFile).Errorf("Loading configuration file failed: %s", err)
}
}()
conf, err := config.LoadFile(*configFile)
if err != nil {
return err
}
api.Update(conf.String(), time.Duration(conf.Global.ResolveTimeout))
tmpl, err = template.FromGlobs(conf.Templates...)
if err != nil {
return err
}
if tmpl.ExternalURL, err = extURL(*externalURL); err != nil {
return err
}
disp.Stop()
inhibitor = NewInhibitor(alerts, conf.InhibitRules, marker)
disp = NewDispatcher(alerts, NewRoute(conf.Route, nil), build(conf.Receivers), marker)
go disp.Run()
return nil
}
if err := reload(); err != nil {
os.Exit(1)
}
router := route.New()
RegisterWeb(router)
api.Register(router.WithPrefix("/api"))
go http.ListenAndServe(*listenAddress, router)
var (
hup = make(chan os.Signal)
term = make(chan os.Signal)
)
signal.Notify(hup, syscall.SIGHUP)
signal.Notify(term, os.Interrupt, syscall.SIGTERM)
go func() {
for range hup {
reload()
}
}()
<-term
log.Infoln("Received SIGTERM, exiting gracefully...")
}