containerd/cmd/containerd/command/main.go
Kevin Parsons 0376dd4605 Don't write dumped stacks to file for ETW capture state
Signed-off-by: Kevin Parsons <kevpar@microsoft.com>
2019-04-19 10:11:24 -07:00

307 lines
8.0 KiB
Go

/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package command
import (
gocontext "context"
"fmt"
"io/ioutil"
"net"
"os"
"os/signal"
"path/filepath"
"runtime"
"time"
"github.com/containerd/containerd/log"
"github.com/containerd/containerd/mount"
"github.com/containerd/containerd/services/server"
srvconfig "github.com/containerd/containerd/services/server/config"
"github.com/containerd/containerd/sys"
"github.com/containerd/containerd/version"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
"google.golang.org/grpc/grpclog"
)
const usage = `
__ _ __
_________ ____ / /_____ _(_)___ ___ _________/ /
/ ___/ __ \/ __ \/ __/ __ ` + "`" + `/ / __ \/ _ \/ ___/ __ /
/ /__/ /_/ / / / / /_/ /_/ / / / / / __/ / / /_/ /
\___/\____/_/ /_/\__/\__,_/_/_/ /_/\___/_/ \__,_/
high performance container runtime
`
func init() {
logrus.SetFormatter(&logrus.TextFormatter{
TimestampFormat: log.RFC3339NanoFixed,
FullTimestamp: true,
})
// Discard grpc logs so that they don't mess with our stdio
grpclog.SetLoggerV2(grpclog.NewLoggerV2(ioutil.Discard, ioutil.Discard, ioutil.Discard))
cli.VersionPrinter = func(c *cli.Context) {
fmt.Println(c.App.Name, version.Package, c.App.Version, version.Revision)
}
}
// App returns a *cli.App instance.
func App() *cli.App {
app := cli.NewApp()
app.Name = "containerd"
app.Version = version.Version
app.Usage = usage
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "config,c",
Usage: "path to the configuration file",
Value: defaultConfigPath,
},
cli.StringFlag{
Name: "log-level,l",
Usage: "set the logging level [trace, debug, info, warn, error, fatal, panic]",
},
cli.StringFlag{
Name: "address,a",
Usage: "address for containerd's GRPC server",
},
cli.StringFlag{
Name: "root",
Usage: "containerd root directory",
},
cli.StringFlag{
Name: "state",
Usage: "containerd state directory",
},
}
app.Flags = append(app.Flags, serviceFlags()...)
app.Commands = []cli.Command{
configCommand,
publishCommand,
ociHook,
}
app.Action = func(context *cli.Context) error {
var (
start = time.Now()
signals = make(chan os.Signal, 2048)
serverC = make(chan *server.Server, 1)
ctx = gocontext.Background()
config = defaultConfig()
)
if err := srvconfig.LoadConfig(context.GlobalString("config"), config); err != nil && !os.IsNotExist(err) {
return err
}
// Apply flags to the config
if err := applyFlags(context, config); err != nil {
return err
}
// Make sure top-level directories are created early.
if err := server.CreateTopLevelDirectories(config); err != nil {
return err
}
// Stop if we are registering or unregistering against Windows SCM.
stop, err := registerUnregisterService(config.Root)
if err != nil {
logrus.Fatal(err)
}
if stop {
return nil
}
done := handleSignals(ctx, signals, serverC)
// start the signal handler as soon as we can to make sure that
// we don't miss any signals during boot
signal.Notify(signals, handledSignals...)
// cleanup temp mounts
if err := mount.SetTempMountLocation(filepath.Join(config.Root, "tmpmounts")); err != nil {
return errors.Wrap(err, "creating temp mount location")
}
// unmount all temp mounts on boot for the server
warnings, err := mount.CleanupTempMounts(0)
if err != nil {
log.G(ctx).WithError(err).Error("unmounting temp mounts")
}
for _, w := range warnings {
log.G(ctx).WithError(w).Warn("cleanup temp mount")
}
var (
address = config.GRPC.Address
ttrpcAddress = fmt.Sprintf("%s.ttrpc", config.GRPC.Address)
)
if address == "" {
return errors.New("grpc address cannot be empty")
}
log.G(ctx).WithFields(logrus.Fields{
"version": version.Version,
"revision": version.Revision,
}).Info("starting containerd")
server, err := server.New(ctx, config)
if err != nil {
return err
}
// Launch as a Windows Service if necessary
if err := launchService(server, done); err != nil {
logrus.Fatal(err)
}
serverC <- server
if config.Debug.Address != "" {
var l net.Listener
if filepath.IsAbs(config.Debug.Address) {
if l, err = sys.GetLocalListener(config.Debug.Address, config.Debug.UID, config.Debug.GID); err != nil {
return errors.Wrapf(err, "failed to get listener for debug endpoint")
}
} else {
if l, err = net.Listen("tcp", config.Debug.Address); err != nil {
return errors.Wrapf(err, "failed to get listener for debug endpoint")
}
}
serve(ctx, l, server.ServeDebug)
}
if config.Metrics.Address != "" {
l, err := net.Listen("tcp", config.Metrics.Address)
if err != nil {
return errors.Wrapf(err, "failed to get listener for metrics endpoint")
}
serve(ctx, l, server.ServeMetrics)
}
// setup the ttrpc endpoint
tl, err := sys.GetLocalListener(ttrpcAddress, config.GRPC.UID, config.GRPC.GID)
if err != nil {
return errors.Wrapf(err, "failed to get listener for main ttrpc endpoint")
}
serve(ctx, tl, server.ServeTTRPC)
if config.GRPC.TCPAddress != "" {
l, err := net.Listen("tcp", config.GRPC.TCPAddress)
if err != nil {
return errors.Wrapf(err, "failed to get listener for TCP grpc endpoint")
}
serve(ctx, l, server.ServeTCP)
}
// setup the main grpc endpoint
l, err := sys.GetLocalListener(address, config.GRPC.UID, config.GRPC.GID)
if err != nil {
return errors.Wrapf(err, "failed to get listener for main endpoint")
}
serve(ctx, l, server.ServeGRPC)
log.G(ctx).Infof("containerd successfully booted in %fs", time.Since(start).Seconds())
<-done
return nil
}
return app
}
func serve(ctx gocontext.Context, l net.Listener, serveFunc func(net.Listener) error) {
path := l.Addr().String()
log.G(ctx).WithField("address", path).Info("serving...")
go func() {
defer l.Close()
if err := serveFunc(l); err != nil {
log.G(ctx).WithError(err).WithField("address", path).Fatal("serve failure")
}
}()
}
func applyFlags(context *cli.Context, config *srvconfig.Config) error {
// the order for config vs flag values is that flags will always override
// the config values if they are set
if err := setLevel(context, config); err != nil {
return err
}
for _, v := range []struct {
name string
d *string
}{
{
name: "root",
d: &config.Root,
},
{
name: "state",
d: &config.State,
},
{
name: "address",
d: &config.GRPC.Address,
},
} {
if s := context.GlobalString(v.name); s != "" {
*v.d = s
}
}
applyPlatformFlags(context)
return nil
}
func setLevel(context *cli.Context, config *srvconfig.Config) error {
l := context.GlobalString("log-level")
if l == "" {
l = config.Debug.Level
}
if l != "" {
lvl, err := log.ParseLevel(l)
if err != nil {
return err
}
logrus.SetLevel(lvl)
}
return nil
}
func dumpStacks(writeToFile bool) {
var (
buf []byte
stackSize int
)
bufferLen := 16384
for stackSize == len(buf) {
buf = make([]byte, bufferLen)
stackSize = runtime.Stack(buf, true)
bufferLen *= 2
}
buf = buf[:stackSize]
logrus.Infof("=== BEGIN goroutine stack dump ===\n%s\n=== END goroutine stack dump ===", buf)
if writeToFile {
// Also write to file to aid gathering diagnostics
name := filepath.Join(os.TempDir(), fmt.Sprintf("containerd.%d.stacks.log", os.Getpid()))
f, err := os.Create(name)
if err != nil {
return
}
defer f.Close()
f.WriteString(string(buf))
logrus.Infof("goroutine stack dump written to %s", name)
}
}