moby/api/server/server_linux.go

// +build linux

package server

import (
	"fmt"
	"net"
	"net/http"

	"github.com/docker/docker/daemon"
	"github.com/docker/docker/pkg/sockets"
	"github.com/docker/docker/pkg/systemd"
)

// newServer sets up the required serverClosers and does protocol specific checking.
func (s *Server) newServer(proto, addr string) ([]serverCloser, error) {
	var (
		err error
		ls  []net.Listener
	)
	switch proto {
	case "fd":
		ls, err = systemd.ListenFD(addr)
		if err != nil {
			return nil, err
		}
		// We don't want to start serving on these sockets until the
		// daemon is initialized and installed. Otherwise required handlers
		// won't be ready.
		<-s.start
	case "tcp":
		l, err := s.initTcpSocket(addr)
		if err != nil {
			return nil, err
		}
		ls = append(ls, l)
	case "unix":
		l, err := sockets.NewUnixSocket(addr, s.cfg.SocketGroup, s.start)
		if err != nil {
			return nil, err
		}
		ls = append(ls, l)
	default:
		return nil, fmt.Errorf("Invalid protocol format: %q", proto)
	}
	var res []serverCloser
	for _, l := range ls {
		res = append(res, &HttpServer{
			&http.Server{
				Addr:    addr,
				Handler: s.router,
			},
			l,
		})
	}
	return res, nil
}

func (s *Server) AcceptConnections(d *daemon.Daemon) {
	// Tell the init daemon we are accepting requests
	s.daemon = d
	go systemd.SdNotify("READY=1")
	// close the lock so the listeners start accepting connections
	select {
	case <-s.start:
	default:
		close(s.start)
	}
}