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package main
import (
"context"
"flag"
"fmt"
"os"
"sync"
"time"
"github.com/mimecast/dtail/internal/cli"
"github.com/mimecast/dtail/internal/clients"
"github.com/mimecast/dtail/internal/config"
"github.com/mimecast/dtail/internal/io/dlog"
"github.com/mimecast/dtail/internal/io/signal"
"github.com/mimecast/dtail/internal/source"
"github.com/mimecast/dtail/internal/version"
)
// The evil begins here.
func main() {
var args config.Args
var displayVersion bool
var pprof string
flag.BoolVar(&displayVersion, "version", false, "Display version")
flag.StringVar(&args.Logger, "logger", config.DefaultHealthCheckLogger, "Logger name")
flag.StringVar(&args.LogLevel, "logLevel", "none", "Log level")
flag.StringVar(&args.ServersStr, "server", "", "Remote server to connect")
flag.BoolVar(&args.NoAuthKey, "no-auth-key", false, "Disable auth-key fast reconnect feature")
flag.StringVar(&pprof, "pprof", "", "Start PProf server this address")
flag.Parse()
if displayVersion {
version.PrintAndExit(false)
}
config.Setup(source.HealthCheck, &args, flag.Args())
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
var wg sync.WaitGroup
wg.Add(1)
dlog.Start(ctx, &wg, source.HealthCheck)
var pprofServer *cli.PProfServer
if pprof != "" {
pprofServer, pprofErr := cli.NewPProfServer(pprof)
if pprofErr != nil {
dlog.Client.Error("Unable to start PProf", pprofErr)
} else {
dlog.Client.Info("Starting PProf", pprofServer.Address())
pprofServer.Start(nil)
}
}
healthClient, err := clients.NewHealthClient(args)
status := 0
if err != nil {
fmt.Fprintf(os.Stderr, "CRITICAL: unable to create dtailhealth client: %v\n", err)
status = 2
} else {
status = healthClient.Start(ctx, signal.NoCh(ctx))
}
if pprofServer != nil {
shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), 5*time.Second)
if err := pprofServer.Shutdown(shutdownCtx); err != nil {
dlog.Client.Error("Unable to stop PProf", err)
}
shutdownCancel()
}
cancel()
wg.Wait()
os.Exit(status)
}
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