101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
package lxc
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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)
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type stepExport struct{}
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func (s *stepExport) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
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config := state.Get("config").(*Config)
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ui := state.Get("ui").(packer.Ui)
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name := config.ContainerName
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containerDir := fmt.Sprintf("/var/lib/lxc/%s", name)
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outputPath := filepath.Join(config.OutputDir, "rootfs.tar.gz")
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configFilePath := filepath.Join(config.OutputDir, "lxc-config")
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configFile, err := os.Create(configFilePath)
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if err != nil {
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err := fmt.Errorf("Error creating config file: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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originalConfigFile, err := os.Open(config.ConfigFile)
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if err != nil {
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err := fmt.Errorf("Error opening config file: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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_, err = io.Copy(configFile, originalConfigFile)
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commands := make([][]string, 4)
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commands[0] = []string{
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"lxc-stop", "--name", name,
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}
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commands[1] = []string{
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"tar", "-C", containerDir, "--numeric-owner", "--anchored", "--exclude=./rootfs/dev/log", "-czf", outputPath, "./rootfs",
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}
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commands[2] = []string{
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"chmod", "+x", configFilePath,
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}
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commands[3] = []string{
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"sh", "-c", "chown $USER:`id -gn` " + filepath.Join(config.OutputDir, "*"),
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}
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ui.Say("Exporting container...")
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for _, command := range commands {
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err := s.SudoCommand(command...)
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if err != nil {
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err := fmt.Errorf("Error exporting container: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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}
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return multistep.ActionContinue
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}
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func (s *stepExport) Cleanup(state multistep.StateBag) {}
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func (s *stepExport) SudoCommand(args ...string) error {
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var stdout, stderr bytes.Buffer
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log.Printf("Executing sudo command: %#v", args)
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cmd := exec.Command("sudo", args...)
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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err := cmd.Run()
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stdoutString := strings.TrimSpace(stdout.String())
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stderrString := strings.TrimSpace(stderr.String())
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if _, ok := err.(*exec.ExitError); ok {
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err = fmt.Errorf("Sudo command error: %s", stderrString)
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}
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log.Printf("stdout: %s", stdoutString)
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log.Printf("stderr: %s", stderrString)
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return err
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}
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