9cbd54018f
The goal of this change is to remove the registration of signal handling from pkg/kubelet. We now pass in a stop channel. If you register a signal handler in `main()` to aid in a controlled and deliberate exit then the handler registered in `pkg/kubelet` often wins and the process exits immediately. This means all other signal handler registrations are currently racy if `DockerServer.Start()` is directly or indirectly invoked. This change also removes another signal handler registration from `NewAPIServerCommand()`; a stop channel is now passed to this function.
88 lines
2.4 KiB
Go
88 lines
2.4 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes 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 remote
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/golang/glog"
|
|
"google.golang.org/grpc"
|
|
runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
|
|
"k8s.io/kubernetes/pkg/kubelet/dockershim"
|
|
"k8s.io/kubernetes/pkg/kubelet/util"
|
|
)
|
|
|
|
// maxMsgSize use 8MB as the default message size limit.
|
|
// grpc library default is 4MB
|
|
const maxMsgSize = 1024 * 1024 * 8
|
|
|
|
// DockerServer is the grpc server of dockershim.
|
|
type DockerServer struct {
|
|
// endpoint is the endpoint to serve on.
|
|
endpoint string
|
|
// service is the docker service which implements runtime and image services.
|
|
service dockershim.CRIService
|
|
// server is the grpc server.
|
|
server *grpc.Server
|
|
}
|
|
|
|
// NewDockerServer creates the dockershim grpc server.
|
|
func NewDockerServer(endpoint string, s dockershim.CRIService) *DockerServer {
|
|
return &DockerServer{
|
|
endpoint: endpoint,
|
|
service: s,
|
|
}
|
|
}
|
|
|
|
// Start starts the dockershim grpc server.
|
|
func (s *DockerServer) Start(stopCh <-chan struct{}) error {
|
|
// Start the internal service.
|
|
if err := s.service.Start(); err != nil {
|
|
glog.Errorf("Unable to start docker service")
|
|
return err
|
|
}
|
|
|
|
glog.V(2).Infof("Start dockershim grpc server")
|
|
l, err := util.CreateListener(s.endpoint)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to listen on %q: %v", s.endpoint, err)
|
|
}
|
|
// Create the grpc server and register runtime and image services.
|
|
s.server = grpc.NewServer(
|
|
grpc.MaxRecvMsgSize(maxMsgSize),
|
|
grpc.MaxSendMsgSize(maxMsgSize),
|
|
)
|
|
runtimeapi.RegisterRuntimeServiceServer(s.server, s.service)
|
|
runtimeapi.RegisterImageServiceServer(s.server, s.service)
|
|
go func() {
|
|
if err := s.server.Serve(l); err != nil {
|
|
glog.Errorf("Failed to serve connections: %v", err)
|
|
}
|
|
}()
|
|
go func() {
|
|
<-stopCh
|
|
s.Stop()
|
|
}()
|
|
return nil
|
|
}
|
|
|
|
// Stop stops the dockershim grpc server.
|
|
func (s *DockerServer) Stop() {
|
|
glog.V(2).Infof("Stop docker server")
|
|
s.server.Stop()
|
|
}
|