/
main.go
189 lines (173 loc) · 5.16 KB
/
main.go
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package main
import (
"context"
"flag"
"fmt"
"io"
"net/http"
"os"
"os/signal"
"syscall"
"github.com/bitleak/lmstfy/auth"
"github.com/bitleak/lmstfy/config"
"github.com/bitleak/lmstfy/engine/migration"
redis_engine "github.com/bitleak/lmstfy/engine/redis"
"github.com/bitleak/lmstfy/log"
"github.com/bitleak/lmstfy/server/handlers"
"github.com/bitleak/lmstfy/server/middleware"
"github.com/bitleak/lmstfy/throttler"
"github.com/bitleak/lmstfy/version"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
)
type optionFlags struct {
ConfFile string
PidFile string
ShowVersion bool
BackTrackLevel string
SkipVerification bool
}
var (
Flags optionFlags
)
func registerSignal(shutdown chan struct{}, logsReopenCallback func()) {
c := make(chan os.Signal, 1)
signal.Notify(c, []os.Signal{syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGUSR1}...)
go func() {
for sig := range c {
if handleSignals(sig, logsReopenCallback) {
close(shutdown)
return
}
}
}()
}
func handleSignals(sig os.Signal, logsReopenCallback func()) (exitNow bool) {
switch sig {
case syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM:
return true
case syscall.SIGUSR1:
logsReopenCallback()
return false
}
return false
}
func parseFlags() {
flagSet := flag.NewFlagSet("lmstfy", flag.ExitOnError)
flagSet.StringVar(&Flags.ConfFile, "c", "conf/config.toml", "config file path")
flagSet.BoolVar(&Flags.ShowVersion, "v", false, "show current version")
flagSet.StringVar(&Flags.BackTrackLevel, "bt", "warn", "show backtrack in the log >= {level}")
flagSet.BoolVar(&Flags.SkipVerification, "sv", false, "dev mode, used to bypass token verification")
flagSet.StringVar(&Flags.PidFile, "p", "running.pid", "pid file path")
flagSet.Parse(os.Args[1:])
}
func printVersion() {
fmt.Printf("version: %s\nbuilt at: %s\ncommit: %s\n", version.Version, version.BuildDate, version.BuildCommit)
}
func apiServer(conf *config.Config, accessLogger, errorLogger *logrus.Logger, devMode bool) *http.Server {
gin.SetMode(gin.ReleaseMode)
engine := gin.New()
engine.Use(
middleware.RequestIDMiddleware,
middleware.AccessLogMiddleware(accessLogger),
handlers.CollectMetrics,
gin.RecoveryWithWriter(errorLogger.Out),
)
handlers.SetupParamDefaults(conf)
err := throttler.Setup(&conf.AdminRedis, errorLogger)
if err != nil {
errorLogger.Errorf("Failed to create throttler, err: %s", err.Error())
}
SetupRoutes(engine, errorLogger, devMode)
addr := fmt.Sprintf("%s:%d", conf.Host, conf.Port)
errorLogger.Infof("Server listening at %s", addr)
srv := http.Server{
Addr: addr,
Handler: engine,
}
go func() {
if err := srv.ListenAndServe(); err != nil {
if err == http.ErrServerClosed {
return
}
panic(fmt.Sprintf("API server failed: %s", err))
}
}()
return &srv
}
func adminServer(conf *config.Config, accessLogger *logrus.Logger, errorLogger *logrus.Logger) *http.Server {
gin.SetMode(gin.ReleaseMode)
engine := gin.New()
engine.Use(
middleware.RequestIDMiddleware,
middleware.AccessLogMiddleware(accessLogger),
gin.RecoveryWithWriter(errorLogger.Out))
SetupAdminRoutes(engine, conf.Accounts)
errorLogger.Infof("Admin port %d", conf.AdminPort)
srv := http.Server{
Addr: fmt.Sprintf("%s:%d", conf.AdminHost, conf.AdminPort),
Handler: engine,
}
go func() {
if err := srv.ListenAndServe(); err != nil {
if err == http.ErrServerClosed {
return
}
panic(fmt.Sprintf("Admin server failed: %s", err))
}
}()
return &srv
}
func createPidFile(logger *logrus.Logger) {
f, err := os.OpenFile(Flags.PidFile, os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
panic("failed to create pid file")
}
io.WriteString(f, fmt.Sprintf("%d", os.Getpid()))
f.Close()
logger.Infof("Server pid: %d", os.Getpid())
}
func removePidFile() {
os.Remove(Flags.PidFile)
}
func main() {
parseFlags()
if Flags.ShowVersion {
printVersion()
return
}
conf, err := config.MustLoad(Flags.ConfFile)
if err != nil {
panic(fmt.Sprintf("Failed to load config file: %s", err))
}
shutdown := make(chan struct{})
accessLogger, errorLogger, err := log.SetupLogger(conf.LogFormat, conf.LogDir, conf.LogLevel, Flags.BackTrackLevel)
if err != nil {
panic(fmt.Sprintf("Failed to setup logger: %s", err))
}
registerSignal(shutdown, func() {
log.ReopenLogs(conf.LogDir, accessLogger, errorLogger)
})
if err := redis_engine.Setup(conf, errorLogger); err != nil {
panic(fmt.Sprintf("Failed to setup redis engine: %s", err))
}
if err := migration.Setup(conf, errorLogger); err != nil {
panic(fmt.Sprintf("Failed to setup migration engine: %s", err))
}
if err := auth.Setup(conf); err != nil {
panic(fmt.Sprintf("Failed to setup auth module: %s", err))
}
if conf.EnableAccessLog {
middleware.EnableAccessLog()
}
apiSrv := apiServer(conf, accessLogger, errorLogger, Flags.SkipVerification)
adminSrv := adminServer(conf, accessLogger, errorLogger)
createPidFile(errorLogger)
<-shutdown
errorLogger.Infof("[%d] Shutting down...", os.Getpid())
removePidFile()
adminSrv.Close() // Admin server does not need to be stopped gracefully
apiSrv.Shutdown(context.Background())
throttler.GetThrottler().Shutdown()
errorLogger.Infof("[%d] Bye bye", os.Getpid())
}