wings/cmd/migrate_vhd.go

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package cmd
import (
"context"
"os"
"os/exec"
"strings"
"emperror.dev/errors"
"github.com/apex/log"
"github.com/pterodactyl/wings/config"
"github.com/pterodactyl/wings/internal/vhd"
"github.com/pterodactyl/wings/loggers/cli"
"github.com/pterodactyl/wings/remote"
"github.com/pterodactyl/wings/server"
"github.com/pterodactyl/wings/server/filesystem"
"github.com/spf13/cobra"
)
type MigrateVHDCommand struct {
manager *server.Manager
}
func newMigrateVHDCommand() *cobra.Command {
return &cobra.Command{
Use: "migrate-vhd",
Short: "migrates existing data from a directory tree into virtual hard-disks",
PreRun: func(cmd *cobra.Command, args []string) {
log.SetLevel(log.DebugLevel)
log.SetHandler(cli.Default)
},
Run: func(cmd *cobra.Command, args []string) {
client := remote.NewFromConfig(config.Get())
manager, err := server.NewManager(cmd.Context(), client, true)
if err != nil {
log.WithField("error", err).Fatal("failed to create new server manager")
}
c := &MigrateVHDCommand{
manager: manager,
}
if err := c.Run(cmd.Context()); err != nil {
log.WithField("error", err).Fatal("failed to execute command")
}
},
}
}
// Run executes the migration command.
func (m *MigrateVHDCommand) Run(ctx context.Context) error {
for _, s := range m.manager.All() {
s.Log().Debug("starting migration of server contents to virtual disk...")
v := vhd.New(s.DiskSpace(), filesystem.VirtualDiskPath(s.Id()), s.Filesystem().Path())
if err := v.Allocate(ctx); err != nil {
return errors.WithStackIf(err)
}
if err := v.MakeFilesystem(ctx); err != nil {
// If the filesystem already exists no worries, just move on with our
// day here.
if !errors.Is(err, vhd.ErrFilesystemExists) {
return errors.WithStack(err)
}
}
bak := strings.TrimSuffix(s.Filesystem().Path(), "/") + "_bak"
// Create a backup directory of the server files if one does not already exist
// at that location. If one does exists we'll just assume it is good to go and
// rely on it to provide the files we'll need.
if _, err := os.Lstat(bak); os.IsNotExist(err) {
if err := os.Rename(s.Filesystem().Path(), bak); err != nil {
return errors.Wrap(err, "failed to rename existing data directory for backup")
}
} else if err != nil {
return errors.WithStack(err)
}
if err := os.RemoveAll(s.Filesystem().Path()); err != nil && !os.IsNotExist(err) {
return errors.Wrap(err, "failed to remove base server files path")
}
// Attempt to mount the disk at the expected path now that we've created
// a backup of the server files.
if err := v.Mount(ctx); err != nil && !errors.Is(err, vhd.ErrFilesystemMounted) {
return errors.WithStackIf(err)
}
// Copy over the files from the backup for this server.
cmd := exec.CommandContext(ctx, "cp", "-a", bak + "/.", s.Filesystem().Path())
if err := cmd.Run(); err != nil {
return errors.WithStack(err)
}
s.Log().Info("finished migration to virtual disk...")
}
return nil
}