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-rw-r--r--cmd/podman/attach.go9
-rw-r--r--cmd/podman/run.go39
-rw-r--r--cmd/podman/start.go9
-rw-r--r--cmd/podman/utils.go87
-rw-r--r--libpod/container_api.go11
-rw-r--r--libpod/container_attach.go71
6 files changed, 158 insertions, 68 deletions
diff --git a/cmd/podman/attach.go b/cmd/podman/attach.go
index 20c1c306d..4b16d013c 100644
--- a/cmd/podman/attach.go
+++ b/cmd/podman/attach.go
@@ -1,6 +1,8 @@
package main
import (
+ "os"
+
"github.com/pkg/errors"
"github.com/projectatomic/libpod/libpod"
"github.com/urfave/cli"
@@ -71,7 +73,12 @@ func attachCmd(c *cli.Context) error {
ProxySignals(ctr)
}
- if err := ctr.Attach(c.Bool("no-stdin"), c.String("detach-keys")); err != nil {
+ inputStream := os.Stdin
+ if c.Bool("no-stdin") {
+ inputStream = nil
+ }
+
+ if err := attachCtr(ctr, os.Stdout, os.Stderr, inputStream, c.String("detach-keys")); err != nil {
return errors.Wrapf(err, "error attaching to container %s", ctr.ID())
}
diff --git a/cmd/podman/run.go b/cmd/podman/run.go
index 4966316c5..b8d6e0968 100644
--- a/cmd/podman/run.go
+++ b/cmd/podman/run.go
@@ -144,9 +144,42 @@ func runCmd(c *cli.Context) error {
return nil
}
- // TODO: that "false" should probably be linked to -i
- // Handle this when we split streams to allow attaching just stdin/out/err
- attachChan, err := ctr.StartAndAttach(false, c.String("detach-keys"))
+ outputStream := os.Stdout
+ errorStream := os.Stderr
+ inputStream := os.Stdin
+
+ // If -i is not set, clear stdin
+ if !c.Bool("interactive") {
+ inputStream = nil
+ }
+
+ // If attach is set, clear stdin/stdout/stderr and only attach requested
+ if c.IsSet("attach") {
+ outputStream = nil
+ errorStream = nil
+ inputStream = nil
+
+ attachTo := c.StringSlice("attach")
+ for _, stream := range attachTo {
+ switch strings.ToLower(stream) {
+ case "stdout":
+ outputStream = os.Stdout
+ case "stderr":
+ errorStream = os.Stderr
+ case "stdin":
+ inputStream = os.Stdin
+ default:
+ return errors.Wrapf(libpod.ErrInvalidArg, "invalid stream %q for --attach - must be one of stdin, stdout, or stderr", stream)
+ }
+ }
+
+ // If --interactive is set, restore stdin
+ if c.Bool("interactive") {
+ inputStream = os.Stdin
+ }
+ }
+
+ attachChan, err := startAttachCtr(ctr, outputStream, errorStream, inputStream, c.String("detach-keys"))
if err != nil {
// This means the command did not exist
exitCode = 127
diff --git a/cmd/podman/start.go b/cmd/podman/start.go
index 1a57a538b..14b03ac7c 100644
--- a/cmd/podman/start.go
+++ b/cmd/podman/start.go
@@ -95,7 +95,7 @@ func startCmd(c *cli.Context) error {
if c.Bool("interactive") && !ctr.Config().Stdin {
return errors.Errorf("the container was not created with the interactive option")
}
- noStdIn := c.Bool("interactive")
+
tty, err := strconv.ParseBool(ctr.Spec().Annotations["io.kubernetes.cri-o.TTY"])
if err != nil {
return errors.Wrapf(err, "unable to parse annotations in %s", ctr.ID())
@@ -105,7 +105,12 @@ func startCmd(c *cli.Context) error {
// We only get a terminal session if both a tty was specified in the spec and
// -a on the command-line was given.
if attach && tty {
- attachChan, err := ctr.StartAndAttach(noStdIn, c.String("detach-keys"))
+ inputStream := os.Stdin
+ if !c.Bool("interactive") {
+ inputStream = nil
+ }
+
+ attachChan, err := startAttachCtr(ctr, os.Stdout, os.Stderr, inputStream, c.String("detach-keys"))
if err != nil {
return errors.Wrapf(err, "unable to start container %s", ctr.ID())
}
diff --git a/cmd/podman/utils.go b/cmd/podman/utils.go
index 8b59e1344..502424403 100644
--- a/cmd/podman/utils.go
+++ b/cmd/podman/utils.go
@@ -1,9 +1,18 @@
package main
import (
+ "os"
+ gosignal "os/signal"
+
"github.com/containers/storage"
+ "github.com/docker/docker/pkg/signal"
+ "github.com/docker/docker/pkg/term"
+ "github.com/pkg/errors"
"github.com/projectatomic/libpod/libpod"
+ "github.com/sirupsen/logrus"
"github.com/urfave/cli"
+ "golang.org/x/crypto/ssh/terminal"
+ "k8s.io/client-go/tools/remotecommand"
)
// Generate a new libpod runtime configured by command line options
@@ -54,3 +63,81 @@ func getRuntime(c *cli.Context) (*libpod.Runtime, error) {
return libpod.NewRuntime(options...)
}
+
+// Attach to a container
+func attachCtr(ctr *libpod.Container, stdout, stderr, stdin *os.File, detachKeys string) error {
+ resize := make(chan remotecommand.TerminalSize)
+
+ haveTerminal := terminal.IsTerminal(int(os.Stdin.Fd()))
+
+ // Check if we are attached to a terminal. If we are, generate resize
+ // events, and set the terminal to raw mode
+ if haveTerminal {
+ logrus.Debugf("Handling terminal attach")
+
+ resizeTty(resize)
+
+ oldTermState, err := term.SaveState(os.Stdin.Fd())
+ if err != nil {
+ return errors.Wrapf(err, "unable to save terminal state")
+ }
+
+ term.SetRawTerminal(os.Stdin.Fd())
+
+ defer term.RestoreTerminal(os.Stdin.Fd(), oldTermState)
+ }
+
+ return ctr.Attach(stdout, stderr, stdin, detachKeys, resize)
+}
+
+// Start and attach to a container
+func startAttachCtr(ctr *libpod.Container, stdout, stderr, stdin *os.File, detachKeys string) (<-chan error, error) {
+ resize := make(chan remotecommand.TerminalSize)
+
+ haveTerminal := terminal.IsTerminal(int(os.Stdin.Fd()))
+
+ // Check if we are attached to a terminal. If we are, generate resize
+ // events, and set the terminal to raw mode
+ if haveTerminal && ctr.Spec().Process.Terminal {
+ logrus.Debugf("Handling terminal attach")
+
+ resizeTty(resize)
+
+ oldTermState, err := term.SaveState(os.Stdin.Fd())
+ if err != nil {
+ return nil, errors.Wrapf(err, "unable to save terminal state")
+ }
+
+ term.SetRawTerminal(os.Stdin.Fd())
+
+ defer term.RestoreTerminal(os.Stdin.Fd(), oldTermState)
+ }
+
+ return ctr.StartAndAttach(stdout, stderr, stdin, detachKeys, resize)
+}
+
+// Helper for prepareAttach - set up a goroutine to generate terminal resize events
+func resizeTty(resize chan remotecommand.TerminalSize) {
+ sigchan := make(chan os.Signal, 1)
+ gosignal.Notify(sigchan, signal.SIGWINCH)
+ sendUpdate := func() {
+ winsize, err := term.GetWinsize(os.Stdin.Fd())
+ if err != nil {
+ logrus.Warnf("Could not get terminal size %v", err)
+ return
+ }
+ resize <- remotecommand.TerminalSize{
+ Width: winsize.Width,
+ Height: winsize.Height,
+ }
+ }
+ go func() {
+ defer close(resize)
+ // Update the terminal size immediately without waiting
+ // for a SIGWINCH to get the correct initial size.
+ sendUpdate()
+ for range sigchan {
+ sendUpdate()
+ }
+ }()
+}
diff --git a/libpod/container_api.go b/libpod/container_api.go
index bfe20b184..fb6c70fd0 100644
--- a/libpod/container_api.go
+++ b/libpod/container_api.go
@@ -1,6 +1,7 @@
package libpod
import (
+ "io"
"io/ioutil"
"os"
"strconv"
@@ -14,6 +15,7 @@ import (
"github.com/projectatomic/libpod/pkg/inspect"
"github.com/sirupsen/logrus"
"k8s.io/apimachinery/pkg/util/wait"
+ "k8s.io/client-go/tools/remotecommand"
)
// Init creates a container in the OCI runtime
@@ -123,7 +125,7 @@ func (c *Container) Start() (err error) {
// attach call.
// The channel will be closed automatically after the result of attach has been
// sent
-func (c *Container) StartAndAttach(noStdin bool, keys string) (attachResChan <-chan error, err error) {
+func (c *Container) StartAndAttach(outputStream, errorStream io.WriteCloser, inputStream io.Reader, keys string, resize <-chan remotecommand.TerminalSize) (attachResChan <-chan error, err error) {
if !c.locked {
c.lock.Lock()
defer c.lock.Unlock()
@@ -176,7 +178,7 @@ func (c *Container) StartAndAttach(noStdin bool, keys string) (attachResChan <-c
// Attach to the container before starting it
go func() {
- if err := c.attach(noStdin, keys); err != nil {
+ if err := c.attach(outputStream, errorStream, inputStream, keys, resize); err != nil {
attachChan <- err
}
close(attachChan)
@@ -404,8 +406,7 @@ func (c *Container) Exec(tty, privileged bool, env, cmd []string, user string) e
}
// Attach attaches to a container
-// Returns fully qualified URL of streaming server for the container
-func (c *Container) Attach(noStdin bool, keys string) error {
+func (c *Container) Attach(outputStream, errorStream io.WriteCloser, inputStream io.Reader, keys string, resize <-chan remotecommand.TerminalSize) error {
if !c.locked {
c.lock.Lock()
if err := c.syncContainer(); err != nil {
@@ -420,7 +421,7 @@ func (c *Container) Attach(noStdin bool, keys string) error {
return errors.Wrapf(ErrCtrStateInvalid, "can only attach to created or running containers")
}
- return c.attach(noStdin, keys)
+ return c.attach(outputStream, errorStream, inputStream, keys, resize)
}
// Mount mounts a container's filesystem on the host
diff --git a/libpod/container_attach.go b/libpod/container_attach.go
index 40d359ddd..2e65755d9 100644
--- a/libpod/container_attach.go
+++ b/libpod/container_attach.go
@@ -5,16 +5,13 @@ import (
"io"
"net"
"os"
- gosignal "os/signal"
"path/filepath"
- "github.com/docker/docker/pkg/signal"
"github.com/docker/docker/pkg/term"
"github.com/pkg/errors"
"github.com/projectatomic/libpod/pkg/kubeutils"
"github.com/projectatomic/libpod/utils"
"github.com/sirupsen/logrus"
- "golang.org/x/crypto/ssh/terminal"
"golang.org/x/sys/unix"
"k8s.io/client-go/tools/remotecommand"
)
@@ -26,33 +23,19 @@ const (
AttachPipeStderr = 3
)
-// resizeTty handles TTY resizing for Attach()
-func resizeTty(resize chan remotecommand.TerminalSize) {
- sigchan := make(chan os.Signal, 1)
- gosignal.Notify(sigchan, signal.SIGWINCH)
- sendUpdate := func() {
- winsize, err := term.GetWinsize(os.Stdin.Fd())
- if err != nil {
- logrus.Warnf("Could not get terminal size %v", err)
- return
- }
- resize <- remotecommand.TerminalSize{
- Width: winsize.Width,
- Height: winsize.Height,
- }
+// Attach to the given container
+// Does not check if state is appropriate
+func (c *Container) attach(outputStream, errorStream io.WriteCloser, inputStream io.Reader, keys string, resize <-chan remotecommand.TerminalSize) error {
+ if outputStream == nil && errorStream == nil && inputStream == nil {
+ return errors.Wrapf(ErrInvalidArg, "must provide at least one stream to attach to")
+ }
+
+ // Do not allow stdin on containers without Stdin set
+ // Conmon was not configured properly
+ if inputStream != nil && !c.config.Stdin {
+ return errors.Wrapf(ErrInvalidArg, "this container was not created as interactive, cannot attach stdin")
}
- go func() {
- defer close(resize)
- // Update the terminal size immediately without waiting
- // for a SIGWINCH to get the correct initial size.
- sendUpdate()
- for range sigchan {
- sendUpdate()
- }
- }()
-}
-func (c *Container) attach(noStdin bool, keys string) error {
// Check the validity of the provided keys first
var err error
detachKeys := []byte{}
@@ -63,40 +46,14 @@ func (c *Container) attach(noStdin bool, keys string) error {
}
}
- // TODO: allow resize channel to be passed in for CRI-O use
- resize := make(chan remotecommand.TerminalSize)
- if terminal.IsTerminal(int(os.Stdin.Fd())) {
- resizeTty(resize)
- } else {
- defer close(resize)
- }
-
logrus.Debugf("Attaching to container %s", c.ID())
- return c.attachContainerSocket(resize, noStdin, detachKeys)
+ return c.attachContainerSocket(resize, detachKeys, outputStream, errorStream, inputStream)
}
// attachContainerSocket connects to the container's attach socket and deals with the IO
// TODO add a channel to allow interruptiong
-func (c *Container) attachContainerSocket(resize <-chan remotecommand.TerminalSize, noStdIn bool, detachKeys []byte) error {
- inputStream := os.Stdin
- outputStream := os.Stdout
- errorStream := os.Stderr
- defer inputStream.Close()
- if terminal.IsTerminal(int(inputStream.Fd())) {
- oldTermState, err := term.SaveState(inputStream.Fd())
- if err != nil {
- return errors.Wrapf(err, "unable to save terminal state")
- }
-
- defer term.RestoreTerminal(inputStream.Fd(), oldTermState)
- }
-
- // Put both input and output into raw when we have a terminal
- if !noStdIn && c.config.Spec.Process.Terminal {
- term.SetRawTerminal(inputStream.Fd())
- }
-
+func (c *Container) attachContainerSocket(resize <-chan remotecommand.TerminalSize, detachKeys []byte, outputStream, errorStream io.WriteCloser, inputStream io.Reader) error {
kubeutils.HandleResizing(resize, func(size remotecommand.TerminalSize) {
controlPath := filepath.Join(c.bundlePath(), "ctl")
controlFile, err := os.OpenFile(controlPath, unix.O_WRONLY, 0)
@@ -129,7 +86,7 @@ func (c *Container) attachContainerSocket(resize <-chan remotecommand.TerminalSi
stdinDone := make(chan error)
go func() {
var err error
- if inputStream != nil && !noStdIn {
+ if inputStream != nil {
_, err = utils.CopyDetachable(conn, inputStream, detachKeys)
conn.CloseWrite()
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-30 23:34:02 +0000