90 lines
2.9 KiB
Go
90 lines
2.9 KiB
Go
/*
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Copyright 2017 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 server
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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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"time"
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"github.com/golang/glog"
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"google.golang.org/grpc"
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"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
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"k8s.io/kubernetes/pkg/util/interrupt"
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)
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// unixProtocol is the network protocol of unix socket.
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const unixProtocol = "unix"
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// CRIContainerdServer is the grpc server of cri-containerd.
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type CRIContainerdServer struct {
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// addr is the address to serve on.
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addr string
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// runtimeService is the cri-containerd runtime service.
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runtimeService runtime.RuntimeServiceServer
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// imageService is the cri-containerd image service.
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imageService runtime.ImageServiceServer
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// server is the grpc server.
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server *grpc.Server
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}
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// NewCRIContainerdServer creates the cri-containerd grpc server.
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func NewCRIContainerdServer(addr string, r runtime.RuntimeServiceServer, i runtime.ImageServiceServer) *CRIContainerdServer {
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return &CRIContainerdServer{
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addr: addr,
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runtimeService: r,
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imageService: i,
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}
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}
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// Run runs the cri-containerd grpc server.
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func (s *CRIContainerdServer) Run() error {
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glog.V(2).Infof("Start cri-containerd 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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runtime.RegisterRuntimeServiceServer(s.server, s.runtimeService)
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runtime.RegisterImageServiceServer(s.server, s.imageService)
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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.server.Stop)
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return h.Run(func() error { return s.server.Serve(l) })
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}
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// ConnectToContainerd returns a grpc client for containerd.
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func ConnectToContainerd(path string, connectionTimeout time.Duration) (*grpc.ClientConn, error) {
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// get the containerd client
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dialOpts := []grpc.DialOption{
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grpc.WithInsecure(),
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grpc.WithTimeout(connectionTimeout),
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grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
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return net.DialTimeout(unixProtocol, path, timeout)
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}),
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}
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return grpc.Dial(fmt.Sprintf("%s://%s", unixProtocol, path), dialOpts...)
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}
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