Fixes for podman-remote run and attach

Fixes the ability to run (create,start) a container and attach to its
console correctly.  We can now also exit from the console without
hanging the remote client.

Signed-off-by: baude <bbaude@redhat.com>

3 files changed, 65 insertions, 39 deletions

diff --git a/pkg/adapter/containers.go b/pkg/adapter/containers.go
index a9b3232e7..d4e8e30d9 100644
--- a/pkg/adapter/containers.go
+++ b/pkg/adapter/containers.go
@@ -255,14 +255,14 @@ func (r *LocalRuntime) Log(c *cliconfig.LogsValues, options *libpod.LogOptions)
 
 // CreateContainer creates a libpod container
 func (r *LocalRuntime) CreateContainer(ctx context.Context, c *cliconfig.CreateValues) (string, error) {
-	results := shared.NewIntermediateLayer(&c.PodmanCommand)
+	results := shared.NewIntermediateLayer(&c.PodmanCommand, false)
 	ctr, _, err := shared.CreateContainer(ctx, &results, r.Runtime)
 	return ctr.ID(), err
 }
 
 // Run a libpod container
 func (r *LocalRuntime) Run(ctx context.Context, c *cliconfig.RunValues, exitCode int) (int, error) {
-	results := shared.NewIntermediateLayer(&c.PodmanCommand)
+	results := shared.NewIntermediateLayer(&c.PodmanCommand, false)
 
 	ctr, createConfig, err := shared.CreateContainer(ctx, &results, r.Runtime)
 	if err != nil {
diff --git a/pkg/adapter/containers_remote.go b/pkg/adapter/containers_remote.go
index 1ae39749f..9ca823760 100644
--- a/pkg/adapter/containers_remote.go
+++ b/pkg/adapter/containers_remote.go
@@ -331,7 +331,7 @@ func (r *LocalRuntime) CreateContainer(ctx context.Context, c *cliconfig.CreateV
 		// TODO need to add attach when that function becomes available
 		return "", errors.New("the remote client only supports detached containers")
 	}
-	results := shared.NewIntermediateLayer(&c.PodmanCommand)
+	results := shared.NewIntermediateLayer(&c.PodmanCommand, true)
 	return iopodman.CreateContainer().Call(r.Conn, results.MakeVarlink())
 }
 
@@ -344,23 +344,21 @@ func (r *LocalRuntime) Run(ctx context.Context, c *cliconfig.RunValues, exitCode
 	// being run.
 
 	// TODO the exit codes for run need to be figured out for remote connections
-	results := shared.NewIntermediateLayer(&c.PodmanCommand)
+	results := shared.NewIntermediateLayer(&c.PodmanCommand, true)
 	cid, err := iopodman.CreateContainer().Call(r.Conn, results.MakeVarlink())
 	if err != nil {
 		return 0, err
 	}
-	_, err = iopodman.StartContainer().Call(r.Conn, cid)
-	if err != nil {
+	if c.Bool("detach") {
+		_, err := iopodman.StartContainer().Call(r.Conn, cid)
+		fmt.Println(cid)
 		return 0, err
 	}
-	errChan, err := r.attach(ctx, os.Stdin, os.Stdout, cid)
+
+	errChan, err := r.attach(ctx, os.Stdin, os.Stdout, cid, true)
 	if err != nil {
 		return 0, err
 	}
-	if c.Bool("detach") {
-		fmt.Println(cid)
-		return 0, err
-	}
 	finalError := <-errChan
 	return 0, finalError
 }
@@ -441,7 +439,7 @@ func (r *LocalRuntime) Ps(c *cliconfig.PsValues, opts shared.PsOptions) ([]share
 	return psContainers, nil
 }
 
-func (r *LocalRuntime) attach(ctx context.Context, stdin, stdout *os.File, cid string) (chan error, error) {
+func (r *LocalRuntime) attach(ctx context.Context, stdin, stdout *os.File, cid string, start bool) (chan error, error) {
 	var (
 		oldTermState *term.State
 	)
@@ -471,8 +469,8 @@ func (r *LocalRuntime) attach(ctx context.Context, stdin, stdout *os.File, cid s
 		term.SetRawTerminal(os.Stdin.Fd())
 
 	}
-
-	_, err = iopodman.Attach().Send(r.Conn, varlink.Upgrade, cid)
+	// TODO add detach keys support
+	_, err = iopodman.Attach().Send(r.Conn, varlink.Upgrade, cid, "", start)
 	if err != nil {
 		restoreTerminal(oldTermState)
 		return nil, err
@@ -533,7 +531,7 @@ func (r *LocalRuntime) Attach(ctx context.Context, c *cliconfig.AttachValues) er
 	if c.NoStdin {
 		inputStream = nil
 	}
-	errChan, err := r.attach(ctx, inputStream, os.Stdout, c.InputArgs[0])
+	errChan, err := r.attach(ctx, inputStream, os.Stdout, c.InputArgs[0], false)
 	if err != nil {
 		return err
 	}
diff --git a/pkg/varlinkapi/attach.go b/pkg/varlinkapi/attach.go
index 53c4d1ff6..9e2a265be 100644
--- a/pkg/varlinkapi/attach.go
+++ b/pkg/varlinkapi/attach.go
@@ -3,29 +3,17 @@
 package varlinkapi
 
 import (
+	"bufio"
 	"io"
 
 	"github.com/containers/libpod/cmd/podman/varlink"
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/pkg/varlinkapi/virtwriter"
+	"github.com/sirupsen/logrus"
 	"k8s.io/client-go/tools/remotecommand"
 )
 
-// Close is method to close the writer
-
-// Attach ...
-func (i *LibpodAPI) Attach(call iopodman.VarlinkCall, name string) error {
-	var finalErr error
-	resize := make(chan remotecommand.TerminalSize)
-	errChan := make(chan error)
-
-	if !call.WantsUpgrade() {
-		return call.ReplyErrorOccurred("client must use upgraded connection to attach")
-	}
-	ctr, err := i.Runtime.LookupContainer(name)
-	if err != nil {
-		return call.ReplyErrorOccurred(err.Error())
-	}
+func setupStreams(call iopodman.VarlinkCall) (*bufio.Reader, *bufio.Writer, *io.PipeReader, *io.PipeWriter, *libpod.AttachStreams) {
 
 	// These are the varlink sockets
 	reader := call.Call.Reader
@@ -49,6 +37,24 @@ func (i *LibpodAPI) Attach(call iopodman.VarlinkCall, name string) error {
 		// Runc eats the error stream
 		AttachError: true,
 	}
+	return reader, writer, pr, pw, &streams
+}
+
+// Attach connects to a containers console
+func (i *LibpodAPI) Attach(call iopodman.VarlinkCall, name string, detachKeys string, start bool) error {
+	var finalErr error
+	resize := make(chan remotecommand.TerminalSize)
+	errChan := make(chan error)
+
+	if !call.WantsUpgrade() {
+		return call.ReplyErrorOccurred("client must use upgraded connection to attach")
+	}
+	ctr, err := i.Runtime.LookupContainer(name)
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+
+	reader, writer, _, pw, streams := setupStreams(call)
 
 	go func() {
 		if err := virtwriter.Reader(reader, nil, nil, pw, resize); err != nil {
@@ -56,20 +62,42 @@ func (i *LibpodAPI) Attach(call iopodman.VarlinkCall, name string) error {
 		}
 	}()
 
+	if start {
+		finalErr = startAndAttach(ctr, streams, detachKeys, resize, errChan)
+	} else {
+		finalErr = attach(ctr, streams, detachKeys, resize, errChan)
+	}
+
+	if finalErr != libpod.ErrDetach && finalErr != nil {
+		logrus.Error(finalErr)
+	}
+	quitWriter := virtwriter.NewVirtWriteCloser(writer, virtwriter.Quit)
+	_, err = quitWriter.Write([]byte("HANG-UP"))
+	// TODO error handling is not quite right here yet
+	return call.Writer.Flush()
+}
+
+func attach(ctr *libpod.Container, streams *libpod.AttachStreams, detachKeys string, resize chan remotecommand.TerminalSize, errChan chan error) error {
 	go func() {
-		// TODO allow for customizable detach keys
-		if err := ctr.Attach(&streams, "", resize); err != nil {
+		if err := ctr.Attach(streams, detachKeys, resize); err != nil {
 			errChan <- err
 		}
 	}()
+	attachError := <-errChan
+	return attachError
+}
 
+func startAndAttach(ctr *libpod.Container, streams *libpod.AttachStreams, detachKeys string, resize chan remotecommand.TerminalSize, errChan chan error) error {
+	var finalErr error
+	attachChan, err := ctr.StartAndAttach(getContext(), streams, detachKeys, resize, false)
+	if err != nil {
+		return err
+	}
 	select {
-	// Blocking on an error
-	case finalErr = <-errChan:
-		// Need to close up shop
-		_ = finalErr
+	case attachChanErr := <-attachChan:
+		finalErr = attachChanErr
+	case chanError := <-errChan:
+		finalErr = chanError
 	}
-	quitWriter := virtwriter.NewVirtWriteCloser(writer, virtwriter.Quit)
-	_, err = quitWriter.Write([]byte("HANG-UP"))
-	return call.Writer.Flush()
+	return finalErr
 }