139 lines
3.9 KiB
Go
139 lines
3.9 KiB
Go
// +build !windows
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package main
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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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"golang.org/x/sys/unix"
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"github.com/containerd/console"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/cmd/ctr/commands"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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)
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func init() {
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runCommand.Flags = append(runCommand.Flags, cli.BoolFlag{
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Name: "rootfs",
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Usage: "use custom rootfs that is not managed by containerd snapshotter.",
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})
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}
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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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logrus.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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logrus.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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logrus.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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func withTTY() containerd.SpecOpts {
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return containerd.WithTTY
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}
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func setHostNetworking() containerd.SpecOpts {
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return containerd.WithHostNamespace(specs.NetworkNamespace)
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}
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func newContainer(ctx gocontext.Context, client *containerd.Client, context *cli.Context) (containerd.Container, error) {
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var (
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ref = context.Args().First()
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id = context.Args().Get(1)
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args = context.Args()[2:]
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)
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if raw := context.String("checkpoint"); raw != "" {
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im, err := client.GetImage(ctx, raw)
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if err != nil {
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return nil, err
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}
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return client.NewContainer(ctx, id, containerd.WithCheckpoint(im, id))
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}
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var (
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opts []containerd.SpecOpts
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cOpts []containerd.NewContainerOpts
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)
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cOpts = append(cOpts, containerd.WithContainerLabels(commands.LabelArgs(context.StringSlice("label"))))
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if context.Bool("rootfs") {
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opts = append(opts, containerd.WithRootFSPath(ref))
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} else {
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image, err := client.GetImage(ctx, ref)
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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.WithImageConfig(image))
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cOpts = append(cOpts, containerd.WithImage(image))
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cOpts = append(cOpts, containerd.WithSnapshotter(context.String("snapshotter")))
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// Even when "readonly" is set, we don't use KindView snapshot here. (#1495)
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// We pass writable snapshot to the OCI runtime, and the runtime remounts it as read-only,
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// after creating some mount points on demand.
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cOpts = append(cOpts, containerd.WithNewSnapshot(id, image))
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}
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if context.Bool("readonly") {
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opts = append(opts, containerd.WithRootFSReadonly())
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}
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cOpts = append(cOpts, containerd.WithRuntime(context.String("runtime"), nil))
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opts = append(opts, withEnv(context), withMounts(context))
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if len(args) > 0 {
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opts = append(opts, containerd.WithProcessArgs(args...))
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}
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if cwd := context.String("cwd"); cwd != "" {
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opts = append(opts, containerd.WithProcessCwd(cwd))
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}
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if context.Bool("tty") {
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opts = append(opts, withTTY())
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}
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if context.Bool("net-host") {
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opts = append(opts, setHostNetworking(), containerd.WithHostHostsFile, containerd.WithHostResolvconf)
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}
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cOpts = append([]containerd.NewContainerOpts{containerd.WithNewSpec(opts...)}, cOpts...)
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return client.NewContainer(ctx, id, cOpts...)
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}
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func newTask(ctx gocontext.Context, client *containerd.Client, container containerd.Container, checkpoint string, tty, nullIO bool) (containerd.Task, error) {
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if checkpoint == "" {
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io := containerd.Stdio
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if tty {
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io = containerd.StdioTerminal
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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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io = containerd.NullIO
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}
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return container.NewTask(ctx, io)
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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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return container.NewTask(ctx, containerd.Stdio, containerd.WithTaskCheckpoint(im))
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}
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