/
vtctl.go
96 lines (82 loc) · 2.34 KB
/
vtctl.go
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// Copyright 2012, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"flag"
"fmt"
"log/syslog"
"os"
"os/signal"
"strings"
"syscall"
"time"
log "github.com/golang/glog"
"github.com/youtube/vitess/go/exit"
"github.com/youtube/vitess/go/vt/logutil"
"github.com/youtube/vitess/go/vt/servenv"
"github.com/youtube/vitess/go/vt/topo"
"github.com/youtube/vitess/go/vt/vtctl"
"github.com/youtube/vitess/go/vt/vttablet/tmclient"
"github.com/youtube/vitess/go/vt/wrangler"
"golang.org/x/net/context"
)
var (
waitTime = flag.Duration("wait-time", 24*time.Hour, "time to wait on an action")
)
func init() {
logger := logutil.NewConsoleLogger()
flag.CommandLine.SetOutput(logutil.NewLoggerWriter(logger))
flag.Usage = func() {
logger.Printf("Usage: %s [global parameters] command [command parameters]\n", os.Args[0])
logger.Printf("\nThe global optional parameters are:\n")
flag.PrintDefaults()
logger.Printf("\nThe commands are listed below, sorted by group. Use '%s <command> -h' for more help.\n\n", os.Args[0])
vtctl.PrintAllCommands(logger)
}
}
// signal handling, centralized here
func installSignalHandlers(cancel func()) {
sigChan := make(chan os.Signal, 1)
signal.Notify(sigChan, syscall.SIGTERM, syscall.SIGINT)
go func() {
<-sigChan
// we got a signal, cancel the current ctx
cancel()
}()
}
func main() {
defer exit.RecoverAll()
defer logutil.Flush()
flag.Parse()
args := flag.Args()
if len(args) == 0 {
flag.Usage()
exit.Return(1)
}
action := args[0]
startMsg := fmt.Sprintf("USER=%v SUDO_USER=%v %v", os.Getenv("USER"), os.Getenv("SUDO_USER"), strings.Join(os.Args, " "))
if syslogger, err := syslog.New(syslog.LOG_INFO, "vtctl "); err == nil {
syslogger.Info(startMsg)
} else {
log.Warningf("cannot connect to syslog: %v", err)
}
servenv.FireRunHooks()
ts := topo.Open()
defer ts.Close()
ctx, cancel := context.WithTimeout(context.Background(), *waitTime)
wr := wrangler.New(logutil.NewConsoleLogger(), ts, tmclient.NewTabletManagerClient())
installSignalHandlers(cancel)
err := vtctl.RunCommand(ctx, wr, args)
cancel()
switch err {
case vtctl.ErrUnknownCommand:
flag.Usage()
exit.Return(1)
case nil:
// keep going
default:
log.Errorf("action failed: %v %v", action, err)
exit.Return(255)
}
}