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run.go
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run.go
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// Copyright (c) 2014,2015,2016 Docker, Inc.
// Copyright (c) 2017 Intel Corporation
//
// 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 main
import (
"errors"
"fmt"
"io"
"os"
"sync"
"syscall"
"github.com/containers/virtcontainers/pkg/oci"
"github.com/docker/docker/pkg/term"
"github.com/urfave/cli"
)
var runCommand = cli.Command{
Name: "run",
Usage: "create and run a container",
ArgsUsage: `<container-id>
<container-id> is your name for the instance of the container that you
are starting. The name you provide for the container instance must be unique
on your host.`,
Description: `The run command creates an instance of a container for a bundle. The bundle
is a directory with a specification file named "config.json" and a root
filesystem.`,
Flags: []cli.Flag{
cli.StringFlag{
Name: "bundle, b",
Value: "",
Usage: `path to the root of the bundle directory, defaults to the current directory`,
},
cli.StringFlag{
Name: "console",
Value: "",
Usage: "path to a pseudo terminal",
},
cli.StringFlag{
Name: "pid-file",
Value: "",
Usage: "specify the file to write the process id to",
},
cli.BoolFlag{
Name: "detach, d",
Usage: "detach from the container's process",
},
},
Action: func(context *cli.Context) error {
return run(context)
},
}
func run(context *cli.Context) error {
runtimeConfig, ok := context.App.Metadata["runtimeConfig"].(oci.RuntimeConfig)
if !ok {
return errors.New("invalid runtime config")
}
consolePath := context.String("console")
var wg sync.WaitGroup
var console *Console
var err error
var consoleState *term.State
// if consolePath is /dev/ptmx or /dev/pts/ptmx
// means that we have to allocate a new pts
if consolePath == ptmxPath || consolePath == ptsPtmxPath {
console, err = newConsole()
if err != nil {
return err
}
// now consolePath is the slave pts
consolePath = console.Path()
}
if err = create(context.Args().First(),
context.String("bundle"),
consolePath,
context.String("pid-file"),
runtimeConfig); err != nil {
return err
}
detach := context.Bool("detach")
if !detach {
wg.Add(1)
go io.Copy(console, os.Stdin)
go func() {
defer wg.Done()
io.Copy(os.Stdout, console)
}()
// Save console state because it will be restored once container ends
consoleState, err = term.SetRawTerminal(os.Stdin.Fd())
if err != nil {
return nil
}
}
pod, err := start(context.Args().First())
if err != nil {
return err
}
if !detach {
containers := pod.GetAllContainers()
if len(containers) == 0 {
return fmt.Errorf("There are no containers running in the pod: %s", pod.ID())
}
p, err := os.FindProcess(containers[0].GetPid())
if err != nil {
return err
}
ps, err := p.Wait()
if err != nil {
return fmt.Errorf("Process state %s: %s", ps.String(), err)
}
// delete container's resources
if err = delete(containers[0].ID(), true); err != nil {
return err
}
// wait for routines
wg.Wait()
// close and restore console
console.Close()
term.RestoreTerminal(os.Stdin.Fd(), consoleState)
//runtime should forward container exit code to the system
return cli.NewExitError("", ps.Sys().(syscall.WaitStatus).ExitStatus())
}
return nil
}