func SendMetrics(server *haproxy.Server) {
c, err := statsd.Dial("localhost:8125")
// TODO: Instead of dying completely, should put this on a retry
// and try again.
if err != nil {
log.Fatal("Could not connect to statsd")
}
for {
info := server.GetInfo()
c.Gauge("current_connections", info.CurrConns, 1)
c.Gauge("cum_connections", info.CumConns, 1)
c.Flush()
time.Sleep(1 * time.Second)
}
}
func main() {
// Read in the configuration file settings. I think we should instead
// serialize to JSON and treat this like a view.
// haproxy.Transform()
flag.StringVar(&flagConfigFile, "configFile", DEFAULT_CONFIG_FILE, "Path to toml file")
flag.StringVar(&flagDebugMode, "debugMode", false, "Enable debug mode")
flag.Parse()
conf, err := LoadConfig(flagConfigFile)
if err != nil {
log.Fatal("Could not load configuration", err)
}
server := new(haproxy.Server)
// We use two channels— one to send actions to the server and one to recieve
// notifications from it. Create them right now.
actionChan := make(chan haproxy.Action)
notificationChan := make(chan haproxy.Event)
// Handle signals gracefully in another goroutine
go gracefulSignals(server, actionChan, notificationChan)
// Start up the HAProxy Server
go server.Start(notificationChan, actionChan)
// Setup the ELB HTTP Handlers
go elb.InitApiHandlers()
// Fire up statsd goroutine if statsd is enabled. This might be better off in
// a seperate binary to monitor HAProxy.
if conf.Statsd.Enabled {
go statsd.SendMetrics(server)
}
// Event loop for handling events from the HAProxy server
// (right now, it only sends start/stop notifications)
for _ = range notificationChan {
log.Println("Received a notification")
server.Socket = conf.Haproxy.Socket
serverInfo := server.GetInfo()
}
}