Working tty and io support in shim

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

api/shim/shim.pb.go

@@ -59,15 +59,24 @@ type EventType int32
 const (
 	EventType_EXIT       EventType = 0
 	EventType_OOM        EventType = 1
+	EventType_CREATED    EventType = 2
+	EventType_STARTED    EventType = 3
+	EventType_EXEC_ADDED EventType = 4
 )
 
 var EventType_name = map[int32]string{
 	0: "EXIT",
 	1: "OOM",
+	2: "CREATED",
+	3: "STARTED",
+	4: "EXEC_ADDED",
 }
 var EventType_value = map[string]int32{
 	"EXIT":       0,
 	"OOM":        1,
+	"CREATED":    2,
+	"STARTED":    3,
+	"EXEC_ADDED": 4,
 }
 
 func (x EventType) String() string {
@@ -3244,58 +3253,60 @@ var (
 func init() { proto.RegisterFile("shim.proto", fileDescriptorShim) }
 
 var fileDescriptorShim = []byte{
-	// 835 bytes of a gzipped FileDescriptorProto
+	// 868 bytes of a gzipped FileDescriptorProto
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+	0x40, 0x07, 0x00, 0x00,
 }

api/shim/shim.proto

@@ -84,6 +84,9 @@ message EventsRequest {
 enum EventType {
 	EXIT = 0;
 	OOM = 1;
+	CREATED = 2;
+	STARTED = 3;
+	EXEC_ADDED = 4;
 }
 
 message Event {

cmd/containerd-shim/main.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
+	"strings"
 	"syscall"
 
 	"google.golang.org/grpc"
@@ -90,7 +91,8 @@ func serve(server *grpc.Server, path string) error {
 	logrus.WithField("socket", path).Debug("serving api on unix socket")
 	go func() {
 		defer l.Close()
-		if err := server.Serve(l); err != nil {
+		if err := server.Serve(l); err != nil &&
+			!strings.Contains(err.Error(), "use of closed network connection") {
 			l.Close()
 			logrus.WithError(err).Fatal("containerd-shim: GRPC server failure")
 		}
@@ -119,7 +121,7 @@ func handleSignals(signals chan os.Signal, server *grpc.Server, service *shim.Se
 		case syscall.SIGTERM, syscall.SIGINT:
 			// TODO: should we forward signals to the processes if they are still running?
 			// i.e. machine reboot
-			server.GracefulStop()
+			server.Stop()
 			return nil
 		}
 	}

cmd/ctr/shim.go

@@ -14,6 +14,7 @@ import (
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/grpclog"
 
+	"github.com/crosbymichael/console"
 	"github.com/docker/containerd/api/shim"
 	"github.com/urfave/cli"
 )
@@ -31,6 +32,10 @@ var fifoFlags = []cli.Flag{
 		Name:  "stderr",
 		Usage: "specify the path to the stderr fifo",
 	},
+	cli.BoolFlag{
+		Name:  "tty,t",
+		Usage: "enable tty support",
+	},
 }
 
 var shimCommand = cli.Command{
@@ -40,6 +45,7 @@ var shimCommand = cli.Command{
 		shimCreateCommand,
 		shimStartCommand,
 		shimDeleteCommand,
+		shimEventsCommand,
 	},
 	Action: func(context *cli.Context) error {
 		cmd := exec.Command("containerd-shim", "--debug")
@@ -80,7 +86,8 @@ var shimCreateCommand = cli.Command{
 		if err != nil {
 			return err
 		}
-		wg, err := prepareStdio(context.String("stdin"), context.String("stdout"), context.String("stderr"), false)
+		tty := context.Bool("tty")
+		wg, err := prepareStdio(context.String("stdin"), context.String("stdout"), context.String("stderr"), tty)
 		if err != nil {
 			return err
 		}
@@ -91,12 +98,31 @@ var shimCreateCommand = cli.Command{
 			Stdin:    context.String("stdin"),
 			Stdout:   context.String("stdout"),
 			Stderr:   context.String("stderr"),
+			Terminal: tty,
 		})
 		if err != nil {
 			return err
 		}
 		fmt.Printf("container created with id %s and pid %d\n", id, r.Pid)
 		if context.Bool("attach") {
+			if tty {
+				current := console.Current()
+				defer current.Reset()
+				if err := current.SetRaw(); err != nil {
+					return err
+				}
+				size, err := current.Size()
+				if err != nil {
+					return err
+				}
+				if _, err := service.Pty(gocontext.Background(), &shim.PtyRequest{
+					Pid:    r.Pid,
+					Width:  uint32(size.Width),
+					Height: uint32(size.Height),
+				}); err != nil {
+					return err
+				}
+			}
 			wg.Wait()
 		}
 		return nil
@@ -133,6 +159,29 @@ var shimDeleteCommand = cli.Command{
 	},
 }
 
+var shimEventsCommand = cli.Command{
+	Name:  "events",
+	Usage: "get events for a shim",
+	Action: func(context *cli.Context) error {
+		service, err := getShimService()
+		if err != nil {
+			return err
+		}
+		events, err := service.Events(gocontext.Background(), &shim.EventsRequest{})
+		if err != nil {
+			return err
+		}
+		for {
+			e, err := events.Recv()
+			if err != nil {
+				return err
+			}
+			fmt.Printf("type=%s id=%s pid=%d status=%d\n", e.Type, e.ID, e.Pid, e.ExitStatus)
+		}
+		return nil
+	},
+}
+
 func getShimService() (shim.ShimClient, error) {
 	bindSocket := "shim.sock"
 

shim/exec.go

@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 	"sync"
 
+	"github.com/crosbymichael/console"
 	runc "github.com/crosbymichael/go-runc"
 	apishim "github.com/docker/containerd/api/shim"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
@@ -16,7 +17,7 @@ type execProcess struct {
 	sync.WaitGroup
 
 	id      string
-	console *runc.Console
+	console console.Console
 	io      runc.IO
 	status  int
 	pid     int
@@ -42,6 +43,7 @@ func newExecProcess(context context.Context, r *apishim.ExecRequest, parent *ini
 		if socket, err = runc.NewConsoleSocket(filepath.Join(cwd, "pty.sock")); err != nil {
 			return nil, err
 		}
+		defer os.Remove(socket.Path())
 	} else {
 		// TODO: get uid/gid
 		if io, err = runc.NewPipeIO(0, 0); err != nil {
@@ -108,10 +110,12 @@ func (e *execProcess) Status() int {
 func (e *execProcess) Exited(status int) {
 	e.status = status
 	e.Wait()
+	if e.io != nil {
 		e.io.Close()
 	}
+}
 
-func (e *execProcess) Resize(ws runc.WinSize) error {
+func (e *execProcess) Resize(ws console.WinSize) error {
 	if e.console == nil {
 		return nil
 	}

shim/init.go

@@ -7,6 +7,7 @@ import (
 	"sync"
 	"syscall"
 
+	"github.com/crosbymichael/console"
 	runc "github.com/crosbymichael/go-runc"
 	apishim "github.com/docker/containerd/api/shim"
 )
@@ -16,7 +17,7 @@ type initProcess struct {
 
 	id      string
 	bundle  string
-	console *runc.Console
+	console console.Console
 	io      runc.IO
 	runc    *runc.Runc
 	status  int
@@ -47,6 +48,7 @@ func newInitProcess(context context.Context, r *apishim.CreateRequest) (*initPro
 		if socket, err = runc.NewConsoleSocket(filepath.Join(cwd, "pty.sock")); err != nil {
 			return nil, err
 		}
+		defer os.Remove(socket.Path())
 	} else {
 		// TODO: get uid/gid
 		if io, err = runc.NewPipeIO(0, 0); err != nil {
@@ -105,11 +107,13 @@ func (p *initProcess) Delete(context context.Context) error {
 	p.killAll(context)
 	p.Wait()
 	err := p.runc.Delete(context, p.id)
+	if p.io != nil {
 		p.io.Close()
+	}
 	return err
 }
 
-func (p *initProcess) Resize(ws runc.WinSize) error {
+func (p *initProcess) Resize(ws console.WinSize) error {
 	if p.console == nil {
 		return nil
 	}

shim/io.go

@@ -7,11 +7,12 @@ import (
 	"sync"
 	"syscall"
 
+	"github.com/crosbymichael/console"
 	runc "github.com/crosbymichael/go-runc"
 	"github.com/tonistiigi/fifo"
 )
 
-func copyConsole(ctx context.Context, console *runc.Console, stdin, stdout, stderr string, wg *sync.WaitGroup) error {
+func copyConsole(ctx context.Context, console console.Console, stdin, stdout, stderr string, wg *sync.WaitGroup) error {
 	in, err := fifo.OpenFifo(ctx, stdin, syscall.O_RDONLY, 0)
 	if err != nil {
 		return err

shim/process.go

@@ -1,12 +1,12 @@
 package shim
 
-import runc "github.com/crosbymichael/go-runc"
+import "github.com/crosbymichael/console"
 
 type process interface {
 	// Pid returns the pid for the process
 	Pid() int
 	// Resize resizes the process console
-	Resize(ws runc.WinSize) error
+	Resize(ws console.WinSize) error
 	// Exited sets the exit status for the process
 	Exited(status int)
 	// Status returns the exit status

shim/service.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"sync"
 
-	runc "github.com/crosbymichael/go-runc"
+	"github.com/crosbymichael/console"
 	apishim "github.com/docker/containerd/api/shim"
 	"github.com/docker/containerd/utils"
 	google_protobuf "github.com/golang/protobuf/ptypes/empty"
@@ -17,7 +17,7 @@ var emptyResponse = &google_protobuf.Empty{}
 func NewService() *Service {
 	return &Service{
 		processes: make(map[int]process),
-		events:    make(chan *apishim.Event, 2048),
+		events:    make(chan *apishim.Event, 4096),
 	}
 }
 
@@ -40,6 +40,11 @@ func (s *Service) Create(ctx context.Context, r *apishim.CreateRequest) (*apishi
 	s.processes[pid] = process
 	s.id = r.ID
 	s.mu.Unlock()
+	s.events <- &apishim.Event{
+		Type: apishim.EventType_CREATED,
+		ID:   r.ID,
+		Pid:  uint32(pid),
+	}
 	return &apishim.CreateResponse{
 		Pid: uint32(pid),
 	}, nil
@@ -49,6 +54,11 @@ func (s *Service) Start(ctx context.Context, r *apishim.StartRequest) (*google_p
 	if err := s.initProcess.Start(ctx); err != nil {
 		return nil, err
 	}
+	s.events <- &apishim.Event{
+		Type: apishim.EventType_STARTED,
+		ID:   s.id,
+		Pid:  uint32(s.initProcess.Pid()),
+	}
 	return emptyResponse, nil
 }
 
@@ -73,13 +83,21 @@ func (s *Service) Exec(ctx context.Context, r *apishim.ExecRequest) (*apishim.Ex
 	}
 	pid := process.Pid()
 	s.processes[pid] = process
+	s.events <- &apishim.Event{
+		Type: apishim.EventType_EXEC_ADDED,
+		ID:   s.id,
+		Pid:  uint32(pid),
+	}
 	return &apishim.ExecResponse{
 		Pid: uint32(pid),
 	}, nil
 }
 
 func (s *Service) Pty(ctx context.Context, r *apishim.PtyRequest) (*google_protobuf.Empty, error) {
-	ws := runc.WinSize{
+	if r.Pid == 0 {
+		return nil, fmt.Errorf("pid not provided in request")
+	}
+	ws := console.WinSize{
 		Width:  uint16(r.Width),
 		Height: uint16(r.Height),
 	}