func setupMetrics(listenAddr, enabledCollectors string) {
if enabledCollectors == "" {
enabledCollectors = sysmetrics.FilterAvailableCollectors(sysmetrics.DefaultCollectors)
}
collectors, err := sysmetrics.LoadCollectors(enabledCollectors)
if err != nil {
log.Fatalf("Couldn't load collectors: %s", err)
}
nodeCollector := sysmetrics.New(collectors)
prometheus.MustRegister(nodeCollector)
http.Handle("/metrics", prometheus.Handler())
go http.ListenAndServe(listenAddr, nil)
}
func main() {
var err error
configFile := "/etc/syndicate/syndicate.toml"
if os.Getenv("SYNDICATE_CONFIG") != "" {
configFile = os.Getenv("SYNDICATE_CONFIG")
}
flag.Parse()
if *printVersionInfo {
fmt.Println("syndicate-client:", syndVersion)
fmt.Println("ring version:", ringVersion)
fmt.Println("build date:", buildDate)
fmt.Println("go version:", goVersion)
return
}
rs := &RingSyndicates{
ch: make(chan bool),
ShutdownComplete: make(chan bool),
waitGroup: &sync.WaitGroup{},
stopped: false,
}
var tc map[string]syndicate.Config
if _, err := toml.DecodeFile(configFile, &tc); err != nil {
log.Fatalln(err)
}
for k, v := range tc {
log.Println("Found config for", k)
log.Println("Config:", v)
syndic := &RingSyndicate{
active: false,
name: k,
config: v,
}
syndic.server, err = syndicate.NewServer(&syndic.config, k)
if err != nil {
log.Fatalln(err)
}
rs.Syndics = append(rs.Syndics, syndic)
}
rs.Lock()
defer rs.Unlock()
for k, _ := range rs.Syndics {
go rs.launchSyndicates(k)
}
//now that syndics are up and running launch global metrics endpoint
//setup node_collector for system level metrics first
collectors, err := sysmetrics.LoadCollectors(*enabledCollectors)
if err != nil {
log.Fatalf("Couldn't load collectors: %s", err)
}
nodeCollector := sysmetrics.New(collectors)
prometheus.MustRegister(nodeCollector)
http.Handle("/metrics", prometheus.Handler())
go http.ListenAndServe(":9100", nil)
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
for {
select {
case <-ch:
rs.Stop()
<-rs.ShutdownComplete
return
case <-rs.ShutdownComplete:
return
}
}
}