packer-cn/builder/lxc/step_export.go

83 lines
1.9 KiB
Go

package lxc
import (
"context"
"fmt"
"io"
"log"
"os"
"os/user"
"path/filepath"
"github.com/hashicorp/packer/helper/multistep"
"github.com/hashicorp/packer/packer"
)
type stepExport struct{}
func (s *stepExport) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ui := state.Get("ui").(packer.Ui)
name := config.ContainerName
lxc_dir := "/var/lib/lxc"
user, err := user.Current()
if err != nil {
log.Print("Cannot find current user. Falling back to /var/lib/lxc...")
}
if user.Uid != "0" && user.HomeDir != "" {
lxc_dir = filepath.Join(user.HomeDir, ".local", "share", "lxc")
}
containerDir := filepath.Join(lxc_dir, name)
outputPath := filepath.Join(config.OutputDir, "rootfs.tar.gz")
configFilePath := filepath.Join(config.OutputDir, "lxc-config")
configFile, err := os.Create(configFilePath)
if err != nil {
err := fmt.Errorf("Error creating config file: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
originalConfigFile, err := os.Open(config.ConfigFile)
if err != nil {
err := fmt.Errorf("Error opening config file: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
_, err = io.Copy(configFile, originalConfigFile)
commands := make([][]string, 3)
commands[0] = []string{
"lxc-stop", "--name", name,
}
commands[1] = []string{
"tar", "-C", containerDir, "--numeric-owner", "--anchored", "--exclude=./rootfs/dev/log", "-czf", outputPath, "./rootfs",
}
commands[2] = []string{
"chmod", "+x", configFilePath,
}
ui.Say("Exporting container...")
for _, command := range commands {
err := RunCommand(command...)
if err != nil {
err := fmt.Errorf("Error exporting container: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
return multistep.ActionContinue
}
func (s *stepExport) Cleanup(state multistep.StateBag) {}