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start.go
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start.go
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/*
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 tasks
import (
"github.com/containerd/console"
"github.com/containerd/containerd"
"github.com/containerd/containerd/cio"
"github.com/containerd/containerd/cmd/ctr/commands"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var startCommand = cli.Command{
Name: "start",
Usage: "start a container that have been created",
ArgsUsage: "CONTAINER",
Flags: []cli.Flag{
cli.BoolFlag{
Name: "null-io",
Usage: "send all IO to /dev/null",
},
cli.StringFlag{
Name: "log-uri",
Usage: "log uri",
},
cli.StringFlag{
Name: "fifo-dir",
Usage: "directory used for storing IO FIFOs",
},
cli.StringFlag{
Name: "pid-file",
Usage: "file path to write the task's pid",
},
cli.BoolFlag{
Name: "detach,d",
Usage: "detach from the task after it has started execution",
},
},
Action: func(context *cli.Context) error {
var (
err error
id = context.Args().Get(0)
detach = context.Bool("detach")
)
if id == "" {
return errors.New("container id must be provided")
}
client, ctx, cancel, err := commands.NewClient(context)
if err != nil {
return err
}
defer cancel()
container, err := client.LoadContainer(ctx, id)
if err != nil {
return err
}
spec, err := container.Spec(ctx)
if err != nil {
return err
}
var (
tty = spec.Process.Terminal
opts = getNewTaskOpts(context)
ioOpts = []cio.Opt{cio.WithFIFODir(context.String("fifo-dir"))}
)
var con console.Console
if tty {
con = console.Current()
defer con.Reset()
if err := con.SetRaw(); err != nil {
return err
}
}
task, err := NewTask(ctx, client, container, "", con, context.Bool("null-io"), context.String("log-uri"), ioOpts, opts...)
if err != nil {
return err
}
var statusC <-chan containerd.ExitStatus
if !detach {
defer task.Delete(ctx)
if statusC, err = task.Wait(ctx); err != nil {
return err
}
}
if context.IsSet("pid-file") {
if err := commands.WritePidFile(context.String("pid-file"), int(task.Pid())); err != nil {
return err
}
}
if err := task.Start(ctx); err != nil {
return err
}
if detach {
return nil
}
if tty {
if err := HandleConsoleResize(ctx, task, con); err != nil {
logrus.WithError(err).Error("console resize")
}
} else {
sigc := commands.ForwardAllSignals(ctx, task)
defer commands.StopCatch(sigc)
}
status := <-statusC
code, _, err := status.Result()
if err != nil {
return err
}
if _, err := task.Delete(ctx); err != nil {
return err
}
if code != 0 {
return cli.NewExitError("", int(code))
}
return nil
},
}