/usr/share/gocode/src/github.com/opencontainers/runc/restore.go is in golang-github-opencontainers-runc-dev 0.0.8+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | // +build linux
package main
import (
"fmt"
"os"
"syscall"
"github.com/Sirupsen/logrus"
"github.com/codegangsta/cli"
"github.com/opencontainers/runc/libcontainer"
"github.com/opencontainers/runc/libcontainer/configs"
"github.com/opencontainers/specs"
)
var restoreCommand = cli.Command{
Name: "restore",
Usage: "restore a container from a previous checkpoint",
Flags: []cli.Flag{
cli.StringFlag{
Name: "image-path",
Value: "",
Usage: "path to criu image files for restoring",
},
cli.StringFlag{
Name: "work-path",
Value: "",
Usage: "path for saving work files and logs",
},
cli.BoolFlag{
Name: "tcp-established",
Usage: "allow open tcp connections",
},
cli.BoolFlag{
Name: "ext-unix-sk",
Usage: "allow external unix sockets",
},
cli.BoolFlag{
Name: "shell-job",
Usage: "allow shell jobs",
},
cli.BoolFlag{
Name: "file-locks",
Usage: "handle file locks, for safety",
},
cli.StringFlag{
Name: "manage-cgroups-mode",
Value: "",
Usage: "cgroups mode: 'soft' (default), 'full' and 'strict'.",
},
cli.StringFlag{
Name: "bundle, b",
Value: "",
Usage: "path to the root of the bundle directory",
},
cli.BoolFlag{
Name: "detach,d",
Usage: "detach from the container's process",
},
cli.StringFlag{
Name: "pid-file",
Value: "",
Usage: "specify the file to write the process id to",
},
},
Action: func(context *cli.Context) {
imagePath := context.String("image-path")
id := context.Args().First()
if id == "" {
fatal(errEmptyID)
}
if imagePath == "" {
imagePath = getDefaultImagePath(context)
}
bundle := context.String("bundle")
if bundle != "" {
if err := os.Chdir(bundle); err != nil {
fatal(err)
}
}
spec, err := loadSpec(specConfig)
if err != nil {
fatal(err)
}
config, err := createLibcontainerConfig(id, spec)
if err != nil {
fatal(err)
}
status, err := restoreContainer(context, spec, config, imagePath)
if err != nil {
fatal(err)
}
os.Exit(status)
},
}
func restoreContainer(context *cli.Context, spec *specs.LinuxSpec, config *configs.Config, imagePath string) (code int, err error) {
var (
rootuid = 0
id = context.Args().First()
)
factory, err := loadFactory(context)
if err != nil {
return -1, err
}
container, err := factory.Load(id)
if err != nil {
container, err = factory.Create(id, config)
if err != nil {
return -1, err
}
}
options := criuOptions(context)
status, err := container.Status()
if err != nil {
logrus.Error(err)
}
if status == libcontainer.Running {
fatal(fmt.Errorf("Container with id %s already running", id))
}
setManageCgroupsMode(context, options)
// ensure that the container is always removed if we were the process
// that created it.
detach := context.Bool("detach")
if !detach {
defer destroy(container)
}
process := &libcontainer.Process{}
tty, err := setupIO(process, rootuid, "", false, detach)
if err != nil {
return -1, err
}
if err := container.Restore(process, options); err != nil {
return -1, err
}
if pidFile := context.String("pid-file"); pidFile != "" {
if err := createPidFile(pidFile, process); err != nil {
process.Signal(syscall.SIGKILL)
process.Wait()
return -1, err
}
}
if detach {
return 0, nil
}
handler := newSignalHandler(tty)
defer handler.Close()
return handler.forward(process)
}
func criuOptions(context *cli.Context) *libcontainer.CriuOpts {
imagePath := getCheckpointImagePath(context)
if err := os.MkdirAll(imagePath, 0655); err != nil {
fatal(err)
}
return &libcontainer.CriuOpts{
ImagesDirectory: imagePath,
WorkDirectory: context.String("work-path"),
LeaveRunning: context.Bool("leave-running"),
TcpEstablished: context.Bool("tcp-established"),
ExternalUnixConnections: context.Bool("ext-unix-sk"),
ShellJob: context.Bool("shell-job"),
FileLocks: context.Bool("file-locks"),
}
}
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