68 lines
2.2 KiB
Go
68 lines
2.2 KiB
Go
package main
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import (
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"fmt"
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"github.com/codegangsta/cli"
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"github.com/docker/libcontainer"
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"strconv"
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"strings"
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)
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var checkpointCommand = cli.Command{
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Name: "checkpoint",
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Usage: "checkpoint a running container",
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Flags: []cli.Flag{
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cli.StringFlag{Name: "id", Value: "nsinit", Usage: "specify the ID for a container"},
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cli.StringFlag{Name: "image-path", Value: "", Usage: "path for saving criu image files"},
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cli.StringFlag{Name: "work-path", Value: "", Usage: "path for saving work files and logs"},
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cli.BoolFlag{Name: "leave-running", Usage: "leave the process running after checkpointing"},
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cli.BoolFlag{Name: "tcp-established", Usage: "allow open tcp connections"},
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cli.BoolFlag{Name: "ext-unix-sk", Usage: "allow external unix sockets"},
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cli.BoolFlag{Name: "shell-job", Usage: "allow shell jobs"},
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cli.StringFlag{Name: "page-server", Value: "", Usage: "ADDRESS:PORT of the page server"},
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},
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Action: func(context *cli.Context) {
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imagePath := context.String("image-path")
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if imagePath == "" {
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fatal(fmt.Errorf("The --image-path option isn't specified"))
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}
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container, err := getContainer(context)
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if err != nil {
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fatal(err)
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}
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// these are the mandatory criu options for a container
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criuOpts := &libcontainer.CriuOpts{
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ImagesDirectory: imagePath,
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WorkDirectory: context.String("work-path"),
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LeaveRunning: context.Bool("leave-running"),
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TcpEstablished: context.Bool("tcp-established"),
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ExternalUnixConnections: context.Bool("ext-unix-sk"),
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ShellJob: context.Bool("shell-job"),
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}
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// xxx following criu opts are optional
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// The dump image can be sent to a criu page server
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if psOpt := context.String("page-server"); psOpt != "" {
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addressPort := strings.Split(psOpt, ":")
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if len(addressPort) != 2 {
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fatal(fmt.Errorf("Use --page-server ADDRESS:PORT to specify page server"))
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}
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port_int, err := strconv.Atoi(addressPort[1])
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if err != nil {
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fatal(fmt.Errorf("Invalid port number"))
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}
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criuOpts.PageServer = libcontainer.CriuPageServerInfo{
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Address: addressPort[0],
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Port: int32(port_int),
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}
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}
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if err := container.Checkpoint(criuOpts); err != nil {
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fatal(err)
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}
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},
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}
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