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libcontainerd: SignalProcess(): accept syscall.Signal

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This helps reducing some type-juggling / conversions further up
the stack.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2022-05-02 00:05:21 +02:00
parent c9b37e5cb4
commit 2ec2b65e45
No known key found for this signature in database
GPG key ID: 76698F39D527CE8C
6 changed files with 17 additions and 16 deletions
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4
daemon/exec.go
View file

@ -279,7 +279,7 @@ func (daemon *Daemon) ContainerExecStart(ctx context.Context, name string, stdin
select {
case <-ctx.Done():
logrus.Debugf("Sending TERM signal to process %v in container %v", name, c.ID)
daemon.containerd.SignalProcess(ctx, c.ID, name, int(signal.SignalMap["TERM"]))
daemon.containerd.SignalProcess(ctx, c.ID, name, signal.SignalMap["TERM"])
timeout := time.NewTimer(termProcessTimeout)
defer timeout.Stop()
@ -287,7 +287,7 @@ func (daemon *Daemon) ContainerExecStart(ctx context.Context, name string, stdin
select {
case <-timeout.C:
logrus.Infof("Container %v, process %v failed to exit within %v of signal TERM - using the force", c.ID, name, termProcessTimeout)
daemon.containerd.SignalProcess(ctx, c.ID, name, int(signal.SignalMap["KILL"]))
daemon.containerd.SignalProcess(ctx, c.ID, name, signal.SignalMap["KILL"])
case <-attachErr:
// TERM signal worked
}

16
daemon/kill.go
View file

@ -60,7 +60,8 @@ func (daemon *Daemon) ContainerKill(name string, sig uint64) error {
// or not running, or if there is a problem returned from the
// underlying kill command.
func (daemon *Daemon) killWithSignal(container *containerpkg.Container, sig int) error {
logrus.Debugf("Sending kill signal %d to container %s", sig, container.ID)
var stopSignal = syscall.Signal(sig)
logrus.Debugf("Sending kill signal %d to container %s", stopSignal, container.ID)
container.Lock()
defer container.Unlock()
@ -69,12 +70,12 @@ func (daemon *Daemon) killWithSignal(container *containerpkg.Container, sig int)
}
var unpause bool
if container.Config.StopSignal != "" && syscall.Signal(sig) != syscall.SIGKILL {
if container.Config.StopSignal != "" && stopSignal != syscall.SIGKILL {
containerStopSignal, err := signal.ParseSignal(container.Config.StopSignal)
if err != nil {
return err
}
if containerStopSignal == syscall.Signal(sig) {
if containerStopSignal == stopSignal {
container.ExitOnNext()
unpause = container.Paused
}
@ -95,7 +96,8 @@ func (daemon *Daemon) killWithSignal(container *containerpkg.Container, sig int)
return nil
}
if err := daemon.kill(container, sig); err != nil {
err := daemon.containerd.SignalProcess(context.Background(), container.ID, libcontainerdtypes.InitProcessName, stopSignal)
if err != nil {
if errdefs.IsNotFound(err) {
unpause = false
logrus.WithError(err).WithField("container", container.ID).WithField("action", "kill").Debug("container kill failed because of 'container not found' or 'no such process'")
@ -125,7 +127,7 @@ func (daemon *Daemon) killWithSignal(container *containerpkg.Container, sig int)
}
attributes := map[string]string{
"signal": fmt.Sprintf("%d", sig),
"signal": fmt.Sprintf("%d", stopSignal),
}
daemon.LogContainerEventWithAttributes(container, "kill", attributes)
return nil
@ -182,7 +184,3 @@ func (daemon *Daemon) killPossiblyDeadProcess(container *containerpkg.Container,
}
return err
}
func (daemon *Daemon) kill(c *containerpkg.Container, sig int) error {
return daemon.containerd.SignalProcess(context.Background(), c.ID, libcontainerdtypes.InitProcessName, sig)
}

3
daemon/util_test.go
View file

@ -5,6 +5,7 @@ package daemon
import (
"context"
"syscall"
"time"
"github.com/containerd/containerd"
@ -35,7 +36,7 @@ func (c *MockContainerdClient) Create(ctx context.Context, containerID string, s
func (c *MockContainerdClient) Start(ctx context.Context, containerID, checkpointDir string, withStdin bool, attachStdio libcontainerdtypes.StdioCallback) (pid int, err error) {
return 0, nil
}
func (c *MockContainerdClient) SignalProcess(ctx context.Context, containerID, processID string, signal int) error {
func (c *MockContainerdClient) SignalProcess(ctx context.Context, containerID, processID string, signal syscall.Signal) error {
return nil
}
func (c *MockContainerdClient) Exec(ctx context.Context, containerID, processID string, spec *specs.Process, withStdin bool, attachStdio libcontainerdtypes.StdioCallback) (int, error) {

4
libcontainerd/remote/client.go
View file

@ -333,12 +333,12 @@ func (c *client) Exec(ctx context.Context, containerID, processID string, spec *
return int(p.Pid()), nil
}
func (c *client) SignalProcess(ctx context.Context, containerID, processID string, signal int) error {
func (c *client) SignalProcess(ctx context.Context, containerID, processID string, signal syscall.Signal) error {
p, err := c.getProcess(ctx, containerID, processID)
if err != nil {
return err
}
return wrapError(p.Kill(ctx, syscall.Signal(signal)))
return wrapError(p.Kill(ctx, signal))
}
func (c *client) ResizeTerminal(ctx context.Context, containerID, processID string, width, height int) error {

3
libcontainerd/types/types.go
View file

@ -2,6 +2,7 @@ package types // import "github.com/docker/docker/libcontainerd/types"
import (
"context"
"syscall"
"time"
"github.com/containerd/containerd"
@ -54,7 +55,7 @@ type Client interface {
Create(ctx context.Context, containerID string, spec *specs.Spec, shim string, runtimeOptions interface{}, opts ...containerd.NewContainerOpts) error
Start(ctx context.Context, containerID, checkpointDir string, withStdin bool, attachStdio StdioCallback) (pid int, err error)
SignalProcess(ctx context.Context, containerID, processID string, signal int) error
SignalProcess(ctx context.Context, containerID, processID string, signal syscall.Signal) error
Exec(ctx context.Context, containerID, processID string, spec *specs.Process, withStdin bool, attachStdio StdioCallback) (int, error)
ResizeTerminal(ctx context.Context, containerID, processID string, width, height int) error
CloseStdin(ctx context.Context, containerID, processID string) error

3
plugin/executor/containerd/containerd.go
View file

@ -4,6 +4,7 @@ import (
"context"
"io"
"sync"
"syscall"
"github.com/containerd/containerd"
"github.com/containerd/containerd/cio"
@ -113,7 +114,7 @@ func (e *Executor) IsRunning(id string) (bool, error) {
// Signal sends the specified signal to the container
func (e *Executor) Signal(id string, signal int) error {
return e.client.SignalProcess(context.Background(), id, libcontainerdtypes.InitProcessName, signal)
return e.client.SignalProcess(context.Background(), id, libcontainerdtypes.InitProcessName, syscall.Signal(signal))
}
// ProcessEvent handles events from containerd