forked from resourced/resourced
/
main.go
182 lines (149 loc) · 4.34 KB
/
main.go
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package main
import (
"errors"
"io/ioutil"
"net"
"net/http"
"os"
"runtime"
"strings"
"time"
"github.com/Sirupsen/logrus"
metrics_graphite "github.com/cyberdelia/go-metrics-graphite"
"github.com/resourced/resourced/agent"
"github.com/resourced/resourced/libtime"
_ "github.com/resourced/resourced/readers/docker"
_ "github.com/resourced/resourced/readers/haproxy"
_ "github.com/resourced/resourced/readers/mcrouter"
_ "github.com/resourced/resourced/readers/memcache"
_ "github.com/resourced/resourced/readers/mysql"
_ "github.com/resourced/resourced/readers/procfs"
_ "github.com/resourced/resourced/readers/redis"
_ "github.com/resourced/resourced/readers/varnish"
)
func init() {
runtime.GOMAXPROCS(runtime.NumCPU())
}
// main runs the web server for resourced.
func main() {
configDir := os.Getenv("RESOURCED_CONFIG_DIR")
if configDir == "" {
err := errors.New("RESOURCED_CONFIG_DIR is required. Setting it to .")
logrus.Error(err)
configDir = "."
}
a, err := agent.New(configDir)
if err != nil {
logrus.Fatal(err)
}
logLevel, err := logrus.ParseLevel(a.GeneralConfig.LogLevel)
if err == nil {
logrus.SetLevel(logLevel)
}
a.RunAllForever()
// Metrics TCP Settings
metricTCPListener, err := a.NewTCPServer(a.GeneralConfig.MetricReceiver, "Metrics Receiver TCP")
if err != nil {
logrus.Fatal(err)
}
if metricTCPListener != nil {
defer metricTCPListener.Close()
go func(metricTCPListener net.Listener) {
for {
conn, err := metricTCPListener.Accept()
if err != nil {
libtime.SleepString("1s")
continue
}
dataInBytes, err := ioutil.ReadAll(conn)
if err != nil {
libtime.SleepString("1s")
continue
}
if strings.Contains(string(dataInBytes), " ") {
go a.HandleGraphite(dataInBytes)
} else {
go a.HandleStatsD(dataInBytes)
}
conn.Write([]byte(""))
conn.Close()
}
}(metricTCPListener)
}
// Metrics UDP Settings
metricUDPListener, err := a.NewUDPServer(a.GeneralConfig.MetricReceiver, "Metrics Receiver UDP")
if err != nil {
logrus.Fatal(err)
}
if metricUDPListener != nil {
defer metricUDPListener.Close()
go func(metricUDPListener *net.UDPConn) {
bufferReader := make([]byte, 1024)
for {
n, _, err := metricUDPListener.ReadFromUDP(bufferReader)
if err != nil {
libtime.SleepString("1s")
continue
}
if strings.Contains(string(bufferReader[0:n]), " ") {
go a.HandleGraphite(bufferReader[0:n])
} else {
go a.HandleStatsD(bufferReader[0:n])
}
}
}(metricUDPListener)
}
// LogReceiver TCP Settings
logReceiverTCPListener, err := a.NewTCPServer(a.GeneralConfig.LogReceiver, "Log Receiver TCP")
if err != nil {
logrus.Fatal(err)
}
if logReceiverTCPListener != nil {
defer logReceiverTCPListener.Close()
go func(logReceiverTCPListener net.Listener) {
for {
conn, err := logReceiverTCPListener.Accept()
if err != nil {
libtime.SleepString("1s")
continue
}
dataInBytes, err := ioutil.ReadAll(conn)
if err != nil {
libtime.SleepString("1s")
continue
}
go a.HandleLog(dataInBytes)
conn.Write([]byte(""))
conn.Close()
}
}(logReceiverTCPListener)
}
// Create TCP connection to publish metrics to localhost
addr, err := net.ResolveTCPAddr("tcp", a.GeneralConfig.MetricReceiver.GetAddr())
if err != nil {
logrus.Fatal(err)
}
// Publish self metrics to localhost
if a.GeneralConfig.MetricReceiver.StatsInterval != "" {
statsInterval, err := time.ParseDuration(a.GeneralConfig.MetricReceiver.StatsInterval)
if err != nil {
logrus.Fatal(err)
}
go metrics_graphite.Graphite(a.NewMetricsRegistryForSelf(), statsInterval, "ResourcedAgent", addr)
go a.FlushStatsDMetricsToResultDB(statsInterval)
}
// HTTP Settings
logFields := a.DefaultLogrusFieldsForHTTP()
if a.GeneralConfig.HTTPS.CertFile != "" && a.GeneralConfig.HTTPS.KeyFile != "" {
logFields["HTTPS.CertFile"] = a.GeneralConfig.HTTPS.CertFile
logFields["HTTPS.KeyFile"] = a.GeneralConfig.HTTPS.KeyFile
logrus.WithFields(logFields).Info("Running HTTPS server")
err = http.ListenAndServeTLS(a.GeneralConfig.Addr, a.GeneralConfig.HTTPS.CertFile, a.GeneralConfig.HTTPS.KeyFile, a.HttpRouter())
} else {
logrus.WithFields(logFields).Info("Running HTTP server")
err = http.ListenAndServe(a.GeneralConfig.Addr, a.HttpRouter())
}
if err != nil {
logrus.Fatal(err)
}
}