2fecf5b02e
Some cases can cause the server initialization to block (namely running a 2nd containerd instance by accident against the same root dir). In this case there is no way to quit the daemon except with `kill -9`. This changes context things so that server init is done in a goroutine and we wait on a channel for it to be ready while we also wait for a ctx.Done(), which will be cancelled if there is a termination signal. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
125 lines
3.3 KiB
Go
125 lines
3.3 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 (
|
|
"context"
|
|
"fmt"
|
|
"os"
|
|
"strings"
|
|
"unsafe"
|
|
|
|
"github.com/Microsoft/go-winio/pkg/etw"
|
|
"github.com/Microsoft/go-winio/pkg/etwlogrus"
|
|
"github.com/Microsoft/go-winio/pkg/guid"
|
|
"github.com/containerd/containerd/log"
|
|
"github.com/containerd/containerd/services/server"
|
|
"github.com/sirupsen/logrus"
|
|
"golang.org/x/sys/windows"
|
|
)
|
|
|
|
var (
|
|
handledSignals = []os.Signal{
|
|
windows.SIGTERM,
|
|
windows.SIGINT,
|
|
}
|
|
)
|
|
|
|
func handleSignals(ctx context.Context, signals chan os.Signal, serverC chan *server.Server, cancel func()) chan struct{} {
|
|
done := make(chan struct{})
|
|
go func() {
|
|
var server *server.Server
|
|
for {
|
|
select {
|
|
case s := <-serverC:
|
|
server = s
|
|
case s := <-signals:
|
|
log.G(ctx).WithField("signal", s).Debug("received signal")
|
|
|
|
if err := notifyStopping(ctx); err != nil {
|
|
log.G(ctx).WithError(err).Error("notify stopping failed")
|
|
}
|
|
|
|
cancel()
|
|
if server != nil {
|
|
server.Stop()
|
|
}
|
|
close(done)
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
setupDumpStacks()
|
|
return done
|
|
}
|
|
|
|
func setupDumpStacks() {
|
|
// Windows does not support signals like *nix systems. So instead of
|
|
// trapping on SIGUSR1 to dump stacks, we wait on a Win32 event to be
|
|
// signaled. ACL'd to builtin administrators and local system
|
|
event := "Global\\stackdump-" + fmt.Sprint(os.Getpid())
|
|
ev, _ := windows.UTF16PtrFromString(event)
|
|
sd, err := windows.SecurityDescriptorFromString("D:P(A;;GA;;;BA)(A;;GA;;;SY)")
|
|
if err != nil {
|
|
logrus.Errorf("failed to get security descriptor for debug stackdump event %s: %s", event, err.Error())
|
|
return
|
|
}
|
|
var sa windows.SecurityAttributes
|
|
sa.Length = uint32(unsafe.Sizeof(sa))
|
|
sa.InheritHandle = 1
|
|
sa.SecurityDescriptor = sd
|
|
h, err := windows.CreateEvent(&sa, 0, 0, ev)
|
|
if h == 0 || err != nil {
|
|
logrus.Errorf("failed to create debug stackdump event %s: %s", event, err.Error())
|
|
return
|
|
}
|
|
go func() {
|
|
logrus.Debugf("Stackdump - waiting signal at %s", event)
|
|
for {
|
|
windows.WaitForSingleObject(h, windows.INFINITE)
|
|
dumpStacks(true)
|
|
}
|
|
}()
|
|
}
|
|
|
|
func etwCallback(sourceID guid.GUID, state etw.ProviderState, level etw.Level, matchAnyKeyword uint64, matchAllKeyword uint64, filterData uintptr) {
|
|
if state == etw.ProviderStateCaptureState {
|
|
dumpStacks(false)
|
|
}
|
|
}
|
|
|
|
func init() {
|
|
// Provider ID: 2acb92c0-eb9b-571a-69cf-8f3410f383ad
|
|
// Provider and hook aren't closed explicitly, as they will exist until
|
|
// process exit. GUID is generated based on name - see
|
|
// Microsoft/go-winio/tools/etw-provider-gen.
|
|
provider, err := etw.NewProvider("ContainerD", etwCallback)
|
|
if err != nil {
|
|
logrus.Error(err)
|
|
} else {
|
|
if hook, err := etwlogrus.NewHookFromProvider(provider); err == nil {
|
|
logrus.AddHook(hook)
|
|
} else {
|
|
logrus.Error(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func isLocalAddress(path string) bool {
|
|
return strings.HasPrefix(path, `\\.\pipe\`)
|
|
}
|