func main() {
config := api.DefaultConfig()
config.Address = "localhost:8500"
client, err := api.NewClient(config)
if err != nil {
log.Fatalf("Fatal error: %v", err)
}
job := myJob{}
// params as follows.
// consul client, leader key, leadership check interval, session ttl, session name, exit on lock found, a DoJob implementation.
leader_election.MaybeAcquireLeadership(client, "example/leader", 20, 30, "example", true, job)
}
func main() {
flag.Parse()
checkFlags()
var pusher push_metric.Pusher
var err error
if *pushMetric {
pusher, err = push_metric.SetupProviders()
if err != nil {
glog.Exitf("Problem while setting up push provider: %v", err)
}
}
config, err := ioutil.ReadFile(*configFlag)
if err != nil {
glog.Exitf("Error reading probe config file: %v", err)
}
probes, err := conf.SetupConfig(config)
if err != nil {
glog.Exitf("Error in probe config setup, exiting: %v", err)
}
err = misc.CheckProbeConfig(probes)
if err != nil {
glog.Exitf("Error in probe config, exiting: %v", err)
}
probeNames := conf.GetProbeNames(probes)
mExp, err := metric_export.SetupMetricExporter(*expositionType)
if err != nil {
glog.Exitf("Error : %v", err)
}
var fh *os.File
if *webLogDir != "" {
fh, err = log.SetupWebLog(*webLogDir, time.Now())
if err != nil {
glog.Exitf("Failed to set up logging", err)
}
} else {
fh = os.Stdout // logs web accesses to stdout. May not be thread safe.
}
ps := misc.NewProbesStatus(probeNames)
http.Handle("/", handlers.CombinedLoggingHandler(fh, http.HandlerFunc(misc.HandleHomePage)))
http.Handle("/status", handlers.CombinedLoggingHandler(fh, misc.HandleStatus(ps)))
http.Handle("/config", handlers.CombinedLoggingHandler(fh, http.HandlerFunc(misc.HandleConfig(config))))
http.Handle(*metricsPath, handlers.CombinedLoggingHandler(fh, mExp.MetricHttpHandler()))
glog.Info("Starting goProbe server.")
glog.Infof("Will expose metrics in %s format via %s http path.", *expositionType, *metricsPath)
glog.Infof("/config shows current config, /status shows current probe status.")
if !*dryRun {
// Start probing.
stopCh := make(chan bool)
if *haMode {
glog.Info("Running in HA mode..")
client, err := getConsulClient()
if err != nil {
glog.Fatalf("Fatal error: %v", err)
}
job := NewDoJob(pusher, probes, mExp, ps)
go leader_election.MaybeAcquireLeadership(client, "goProbe/leader", 20, 30, "goProbe", false, job)
} else {
go runProbes(pusher, probes, mExp, ps, stopCh)
}
if err = http.ListenAndServe(*listenAddress, nil); err != nil {
panic(err)
}
} else {
glog.Info("Dry run mode.")
}
}