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package main
import (
"context"
"flag"
"os"
"sync"
"net/http"
_ "net/http"
_ "net/http/pprof"
"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/profiling"
"github.com/mimecast/dtail/internal/source"
"github.com/mimecast/dtail/internal/user"
"github.com/mimecast/dtail/internal/version"
)
// The evil begins here.
func main() {
var args config.Args
var displayVersion bool
var pprof string
var profileFlags profiling.Flags
userName := user.Name()
flag.BoolVar(&args.NoColor, "noColor", false, "Disable ANSII terminal colors")
flag.BoolVar(&args.NoAuthKey, "no-auth-key", false, "Disable auth-key fast reconnect feature")
flag.BoolVar(&args.Quiet, "quiet", false, "Quiet output mode")
flag.BoolVar(&args.Plain, "plain", false, "Plain output mode")
flag.BoolVar(&args.TrustAllHosts, "trustAllHosts", false, "Trust all unknown host keys")
flag.BoolVar(&displayVersion, "version", false, "Display version")
flag.IntVar(&args.ConnectionsPerCPU, "cpc", config.DefaultConnectionsPerCPU,
"How many connections established per CPU core concurrently")
flag.IntVar(&args.SSHAgentKeyIndex, "agentKeyIndex", -1, "SSH agent key index to use (-1 for all keys)")
flag.IntVar(&args.SSHPort, "port", config.DefaultSSHPort, "SSH server port")
flag.StringVar(&args.ConfigFile, "cfg", "", "Config file path")
flag.StringVar(&args.Discovery, "discovery", "", "Server discovery method")
flag.StringVar(&args.LogDir, "logDir", "~/log", "Log dir")
flag.StringVar(&args.Logger, "logger", config.DefaultClientLogger, "Logger name")
flag.StringVar(&args.LogLevel, "logLevel", config.DefaultLogLevel, "Log level")
flag.StringVar(&args.SSHPrivateKeyFilePath, "key", "", "Path to private key")
flag.StringVar(&args.SSHPrivateKeyFilePath, "auth-key-path", "", "Path to auth key/private key (default ~/.ssh/id_rsa)")
flag.StringVar(&args.ServersStr, "servers", "", "Remote servers to connect")
flag.StringVar(&args.UserName, "user", userName, "Your system user name")
flag.StringVar(&args.What, "files", "", "File(s) to read")
flag.StringVar(&pprof, "pprof", "", "Start PProf server this address")
// Add profiling flags
profiling.AddFlags(&profileFlags)
flag.Parse()
config.Setup(source.Client, &args, flag.Args())
if displayVersion {
version.PrintAndExit()
}
ctx, cancel := context.WithCancel(context.Background())
var wg sync.WaitGroup
wg.Add(1)
dlog.Start(ctx, &wg, source.Client)
// Set up profiling
profiler := profiling.NewProfiler(profileFlags.ToConfig("dcat"))
defer profiler.Stop()
if pprof != "" {
dlog.Client.Info("Starting PProf", pprof)
go func() {
panic(http.ListenAndServe(pprof, nil))
}()
}
// Log initial metrics if profiling is enabled
if profileFlags.Enabled() {
profiler.LogMetrics("startup")
}
client, err := clients.NewCatClient(args)
if err != nil {
panic(err)
}
status := client.Start(ctx, signal.InterruptCh(ctx))
// Log final metrics if profiling is enabled
if profileFlags.Enabled() {
profiler.LogMetrics("shutdown")
}
// Stop profiler before exit
profiler.Stop()
cancel()
wg.Wait()
os.Exit(status)
}
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