136 lines
3.2 KiB
Go
136 lines
3.2 KiB
Go
// +build freebsd linux
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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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"net/http"
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"strconv"
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"github.com/docker/docker/daemon"
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"github.com/docker/docker/pkg/sockets"
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"github.com/docker/libnetwork/portallocator"
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systemdActivation "github.com/coreos/go-systemd/activation"
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systemdDaemon "github.com/coreos/go-systemd/daemon"
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)
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// newServer sets up the required serverClosers and does protocol specific checking.
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func (s *Server) newServer(proto, addr string) ([]serverCloser, error) {
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var (
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err error
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ls []net.Listener
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)
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switch proto {
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case "fd":
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ls, err = listenFD(addr)
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if err != nil {
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return nil, err
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}
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// We don't want to start serving on these sockets until the
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// daemon is initialized and installed. Otherwise required handlers
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// won't be ready.
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<-s.start
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case "tcp":
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l, err := s.initTCPSocket(addr)
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if err != nil {
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return nil, err
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}
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ls = append(ls, l)
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case "unix":
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l, err := sockets.NewUnixSocket(addr, s.cfg.SocketGroup, s.start)
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if err != nil {
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return nil, err
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}
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ls = append(ls, l)
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default:
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return nil, fmt.Errorf("Invalid protocol format: %q", proto)
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}
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var res []serverCloser
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for _, l := range ls {
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res = append(res, &HTTPServer{
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&http.Server{
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Addr: addr,
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Handler: s.router,
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},
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l,
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})
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}
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return res, nil
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}
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// AcceptConnections allows clients to connect to the API server.
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// Referenced Daemon is notified about this server, and waits for the
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// daemon acknowledgement before the incoming connections are accepted.
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func (s *Server) AcceptConnections(d *daemon.Daemon) {
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// Tell the init daemon we are accepting requests
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s.daemon = d
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s.registerSubRouter()
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go systemdDaemon.SdNotify("READY=1")
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// close the lock so the listeners start accepting connections
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select {
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case <-s.start:
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default:
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close(s.start)
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}
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}
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func allocateDaemonPort(addr string) error {
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host, port, err := net.SplitHostPort(addr)
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if err != nil {
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return err
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}
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intPort, err := strconv.Atoi(port)
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if err != nil {
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return err
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}
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var hostIPs []net.IP
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if parsedIP := net.ParseIP(host); parsedIP != nil {
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hostIPs = append(hostIPs, parsedIP)
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} else if hostIPs, err = net.LookupIP(host); err != nil {
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return fmt.Errorf("failed to lookup %s address in host specification", host)
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}
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pa := portallocator.Get()
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for _, hostIP := range hostIPs {
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if _, err := pa.RequestPort(hostIP, "tcp", intPort); err != nil {
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return fmt.Errorf("failed to allocate daemon listening port %d (err: %v)", intPort, err)
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}
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}
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return nil
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}
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// listenFD returns the specified socket activated files as a slice of
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// net.Listeners or all of the activated files if "*" is given.
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func listenFD(addr string) ([]net.Listener, error) {
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// socket activation
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listeners, err := systemdActivation.Listeners(false)
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if err != nil {
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return nil, err
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}
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if listeners == nil || len(listeners) == 0 {
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return nil, fmt.Errorf("No sockets found")
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}
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// default to all fds just like unix:// and tcp://
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if addr == "" {
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addr = "*"
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}
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fdNum, _ := strconv.Atoi(addr)
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fdOffset := fdNum - 3
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if (addr != "*") && (len(listeners) < int(fdOffset)+1) {
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return nil, fmt.Errorf("Too few socket activated files passed in")
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}
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if addr == "*" {
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return listeners, nil
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}
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return []net.Listener{listeners[fdOffset]}, nil
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}
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