mirror of https://github.com/k3s-io/k3s
90 lines
2.6 KiB
Go
90 lines
2.6 KiB
Go
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/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package remote
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import (
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"fmt"
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"net"
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"os"
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"syscall"
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"github.com/golang/glog"
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"google.golang.org/grpc"
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runtimeApi "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
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"k8s.io/kubernetes/pkg/kubelet/dockershim"
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"k8s.io/kubernetes/pkg/util/interrupt"
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)
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const (
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// defaultEndpoint is the default address of dockershim grpc server socket.
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defaultAddress = "/var/run/dockershim.sock"
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// unixProtocol is the network protocol of unix socket.
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unixProtocol = "unix"
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)
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// DockerServer is the grpc server of dockershim.
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type DockerServer struct {
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// addr is the address to serve on.
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addr string
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// service is the docker service which implements runtime and image services.
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service DockerService
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// server is the grpc server.
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server *grpc.Server
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}
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// NewDockerServer creates the dockershim grpc server.
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func NewDockerServer(addr string, s dockershim.DockerService) *DockerServer {
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return &DockerServer{
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addr: addr,
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service: NewDockerService(s),
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}
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}
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// Start starts the dockershim grpc server.
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func (s *DockerServer) Start() error {
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glog.V(2).Infof("Start dockershim grpc server")
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// Unlink to cleanup the previous socket file.
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err := syscall.Unlink(s.addr)
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if err != nil && !os.IsNotExist(err) {
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return fmt.Errorf("failed to unlink socket file %q: %v", s.addr, err)
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}
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l, err := net.Listen(unixProtocol, s.addr)
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if err != nil {
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return fmt.Errorf("failed to listen on %q: %v", s.addr, err)
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}
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// Create the grpc server and register runtime and image services.
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s.server = grpc.NewServer()
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runtimeApi.RegisterRuntimeServiceServer(s.server, s.service)
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runtimeApi.RegisterImageServiceServer(s.server, s.service)
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go func() {
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// Use interrupt handler to make sure the server to be stopped properly.
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h := interrupt.New(nil, s.Stop)
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err := h.Run(func() error { return s.server.Serve(l) })
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if err != nil {
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glog.Errorf("Failed to serve connections: %v", err)
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}
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}()
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return nil
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}
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// Stop stops the dockershim grpc server.
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func (s *DockerServer) Stop() {
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glog.V(2).Infof("Stop docker server")
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s.server.Stop()
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}
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