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package main
import (
"errors"
"fmt"
"os"
"strconv"
liblxc "gopkg.in/lxc/go-lxc.v2"
"github.com/spf13/cobra"
)
type cmdForkmigrate struct {
global *cmdGlobal
}
func (c *cmdForkmigrate) command() *cobra.Command {
// Main subcommand
cmd := &cobra.Command{}
cmd.Use = "forkmigrate <container name> <containers path> <config> <images path> <preserve>"
cmd.Short = "Restore the container from saved state"
cmd.Long = `Description:
Restore the container from saved state
This internal command is used to start the container as a separate
process, restoring its recorded state.
`
cmd.RunE = c.run
cmd.Hidden = true
return cmd
}
func (c *cmdForkmigrate) run(cmd *cobra.Command, args []string) error {
// Quick checks.
if len(args) != 5 {
_ = cmd.Help()
if len(args) == 0 {
return nil
}
return errors.New("Missing required arguments")
}
// Only root should run this
if os.Geteuid() != 0 {
return errors.New("This must be run as root")
}
name := args[0]
lxcpath := args[1]
configPath := args[2]
imagesDir := args[3]
preservesInodes, err := strconv.ParseBool(args[4])
if err != nil {
return err
}
d, err := liblxc.NewContainer(name, lxcpath)
if err != nil {
return err
}
err = d.LoadConfigFile(configPath)
if err != nil {
return fmt.Errorf("Failed loading config file %q: %w", configPath, err)
}
/* see https://github.com/golang/go/issues/13155, startContainer, and dc3a229 */
_ = os.Stdin.Close()
_ = os.Stdout.Close()
_ = os.Stderr.Close()
return d.Migrate(liblxc.MIGRATE_RESTORE, liblxc.MigrateOptions{
Directory: imagesDir,
Verbose: true,
PreservesInodes: preservesInodes,
})
}
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