83 lines
2.1 KiB
Go
83 lines
2.1 KiB
Go
// +build !windows
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package tasks
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import (
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gocontext "context"
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"os"
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"os/signal"
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"github.com/containerd/console"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/cio"
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"github.com/containerd/containerd/log"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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"golang.org/x/sys/unix"
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)
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func init() {
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startCommand.Flags = append(startCommand.Flags, cli.BoolFlag{
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Name: "no-pivot",
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Usage: "disable use of pivot-root (linux only)",
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})
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}
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// HandleConsoleResize resizes the console
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func HandleConsoleResize(ctx gocontext.Context, task resizer, con console.Console) error {
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// do an initial resize of the console
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size, err := con.Size()
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if err != nil {
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return err
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}
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if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
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log.G(ctx).WithError(err).Error("resize pty")
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}
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s := make(chan os.Signal, 16)
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signal.Notify(s, unix.SIGWINCH)
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go func() {
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for range s {
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size, err := con.Size()
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if err != nil {
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log.G(ctx).WithError(err).Error("get pty size")
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continue
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}
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if err := task.Resize(ctx, uint32(size.Width), uint32(size.Height)); err != nil {
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log.G(ctx).WithError(err).Error("resize pty")
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}
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}
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}()
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return nil
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}
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// NewTask creates a new task
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func NewTask(ctx gocontext.Context, client *containerd.Client, container containerd.Container, checkpoint string, tty, nullIO bool, opts ...containerd.NewTaskOpts) (containerd.Task, error) {
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stdio := cio.NewCreator(cio.WithStdio)
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if checkpoint == "" {
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ioCreator := stdio
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if tty {
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ioCreator = cio.NewCreator(cio.WithStdio, cio.WithTerminal)
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}
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if nullIO {
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if tty {
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return nil, errors.New("tty and null-io cannot be used together")
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}
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ioCreator = cio.NullIO
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}
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return container.NewTask(ctx, ioCreator, opts...)
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}
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im, err := client.GetImage(ctx, checkpoint)
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if err != nil {
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return nil, err
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}
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opts = append(opts, containerd.WithTaskCheckpoint(im))
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return container.NewTask(ctx, stdio, opts...)
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}
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func getNewTaskOpts(context *cli.Context) []containerd.NewTaskOpts {
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if context.Bool("no-pivot") {
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return []containerd.NewTaskOpts{containerd.WithNoPivotRoot}
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}
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return nil
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}
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