Runtime v2

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

runtime/v1/linux/process.go

@@ -0,0 +1,166 @@
+// +build linux
+
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package linux
+
+import (
+	"context"
+
+	eventstypes "github.com/containerd/containerd/api/events"
+	"github.com/containerd/containerd/api/types/task"
+	"github.com/containerd/containerd/errdefs"
+	"github.com/containerd/containerd/runtime"
+	shim "github.com/containerd/containerd/runtime/v1/shim/v1"
+	"github.com/containerd/ttrpc"
+	"github.com/pkg/errors"
+)
+
+// Process implements a linux process
+type Process struct {
+	id string
+	t  *Task
+}
+
+// ID of the process
+func (p *Process) ID() string {
+	return p.id
+}
+
+// Kill sends the provided signal to the underlying process
+//
+// Unable to kill all processes in the task using this method on a process
+func (p *Process) Kill(ctx context.Context, signal uint32, _ bool) error {
+	_, err := p.t.shim.Kill(ctx, &shim.KillRequest{
+		Signal: signal,
+		ID:     p.id,
+	})
+	if err != nil {
+		return errdefs.FromGRPC(err)
+	}
+	return err
+}
+
+// State of process
+func (p *Process) State(ctx context.Context) (runtime.State, error) {
+	// use the container status for the status of the process
+	response, err := p.t.shim.State(ctx, &shim.StateRequest{
+		ID: p.id,
+	})
+	if err != nil {
+		if errors.Cause(err) != ttrpc.ErrClosed {
+			return runtime.State{}, errdefs.FromGRPC(err)
+		}
+
+		// We treat ttrpc.ErrClosed as the shim being closed, but really this
+		// likely means that the process no longer exists. We'll have to plumb
+		// the connection differently if this causes problems.
+		return runtime.State{}, errdefs.ErrNotFound
+	}
+	var status runtime.Status
+	switch response.Status {
+	case task.StatusCreated:
+		status = runtime.CreatedStatus
+	case task.StatusRunning:
+		status = runtime.RunningStatus
+	case task.StatusStopped:
+		status = runtime.StoppedStatus
+	case task.StatusPaused:
+		status = runtime.PausedStatus
+	case task.StatusPausing:
+		status = runtime.PausingStatus
+	}
+	return runtime.State{
+		Pid:        response.Pid,
+		Status:     status,
+		Stdin:      response.Stdin,
+		Stdout:     response.Stdout,
+		Stderr:     response.Stderr,
+		Terminal:   response.Terminal,
+		ExitStatus: response.ExitStatus,
+	}, nil
+}
+
+// ResizePty changes the side of the process's PTY to the provided width and height
+func (p *Process) ResizePty(ctx context.Context, size runtime.ConsoleSize) error {
+	_, err := p.t.shim.ResizePty(ctx, &shim.ResizePtyRequest{
+		ID:     p.id,
+		Width:  size.Width,
+		Height: size.Height,
+	})
+	if err != nil {
+		err = errdefs.FromGRPC(err)
+	}
+	return err
+}
+
+// CloseIO closes the provided IO pipe for the process
+func (p *Process) CloseIO(ctx context.Context) error {
+	_, err := p.t.shim.CloseIO(ctx, &shim.CloseIORequest{
+		ID:    p.id,
+		Stdin: true,
+	})
+	if err != nil {
+		return errdefs.FromGRPC(err)
+	}
+	return nil
+}
+
+// Start the process
+func (p *Process) Start(ctx context.Context) error {
+	r, err := p.t.shim.Start(ctx, &shim.StartRequest{
+		ID: p.id,
+	})
+	if err != nil {
+		return errdefs.FromGRPC(err)
+	}
+	p.t.events.Publish(ctx, runtime.TaskExecStartedEventTopic, &eventstypes.TaskExecStarted{
+		ContainerID: p.t.id,
+		Pid:         r.Pid,
+		ExecID:      p.id,
+	})
+	return nil
+}
+
+// Wait on the process to exit and return the exit status and timestamp
+func (p *Process) Wait(ctx context.Context) (*runtime.Exit, error) {
+	r, err := p.t.shim.Wait(ctx, &shim.WaitRequest{
+		ID: p.id,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return &runtime.Exit{
+		Timestamp: r.ExitedAt,
+		Status:    r.ExitStatus,
+	}, nil
+}
+
+// Delete the process and return the exit status
+func (p *Process) Delete(ctx context.Context) (*runtime.Exit, error) {
+	r, err := p.t.shim.DeleteProcess(ctx, &shim.DeleteProcessRequest{
+		ID: p.id,
+	})
+	if err != nil {
+		return nil, errdefs.FromGRPC(err)
+	}
+	return &runtime.Exit{
+		Status:    r.ExitStatus,
+		Timestamp: r.ExitedAt,
+		Pid:       r.Pid,
+	}, nil
+}