/
step_export.go
87 lines (72 loc) · 2.14 KB
/
step_export.go
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package lxc
import (
"context"
"fmt"
"io"
"log"
"os"
"os/user"
"path/filepath"
"github.com/hashicorp/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
)
type stepExport struct{}
func (s *stepExport) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ui := state.Get("ui").(packersdk.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)
if err != nil {
err := fmt.Errorf("error copying file %s: %v", config.ConfigFile, err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
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) {}