lotus-miner backup command

node/impl/storminer.go

@@ -5,21 +5,24 @@ import (
 	"encoding/json"
 	"net/http"
 	"os"
+	"path/filepath"
 	"strconv"
+	"strings"
 	"time"
 
-	datatransfer "github.com/filecoin-project/go-data-transfer"
-	"github.com/filecoin-project/go-state-types/big"
 	"github.com/ipfs/go-cid"
 	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/mitchellh/go-homedir"
 	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/go-address"
+	datatransfer "github.com/filecoin-project/go-data-transfer"
 	"github.com/filecoin-project/go-fil-markets/piecestore"
 	retrievalmarket "github.com/filecoin-project/go-fil-markets/retrievalmarket"
 	storagemarket "github.com/filecoin-project/go-fil-markets/storagemarket"
 	"github.com/filecoin-project/go-jsonrpc/auth"
 	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/go-state-types/big"
 
 	sectorstorage "github.com/filecoin-project/lotus/extern/sector-storage"
 	"github.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper"
@@ -31,9 +34,11 @@ import (
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/api/apistruct"
 	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/filecoin-project/lotus/lib/backupds"
 	"github.com/filecoin-project/lotus/miner"
 	"github.com/filecoin-project/lotus/node/impl/common"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
+	"github.com/filecoin-project/lotus/node/repo"
 	"github.com/filecoin-project/lotus/storage"
 	"github.com/filecoin-project/lotus/storage/sectorblocks"
 )
@@ -56,6 +61,9 @@ type StorageMinerAPI struct {
 	DataTransfer dtypes.ProviderDataTransfer
 	Host         host.Host
 
+	DS   dtypes.MetadataDS
+	Repo repo.LockedRepo
+
 	ConsiderOnlineStorageDealsConfigFunc       dtypes.ConsiderOnlineStorageDealsConfigFunc
 	SetConsiderOnlineStorageDealsConfigFunc    dtypes.SetConsiderOnlineStorageDealsConfigFunc
 	ConsiderOnlineRetrievalDealsConfigFunc     dtypes.ConsiderOnlineRetrievalDealsConfigFunc
@@ -516,4 +524,59 @@ func (sm *StorageMinerAPI) PiecesGetCIDInfo(ctx context.Context, payloadCid cid.
 	return &ci, nil
 }
 
+func (sm *StorageMinerAPI) CreateBackup(ctx context.Context, fpath string) error {
+	// TODO: Config
+	bb, ok := os.LookupEnv("LOTUS_BACKUP_BASE_PATH")
+	if !ok {
+		return xerrors.Errorf("LOTUS_BACKUP_BASE_PATH env var not set")
+	}
+
+	bds, ok := sm.DS.(*backupds.Datastore)
+	if !ok {
+		return xerrors.Errorf("expected a backup datastore")
+	}
+
+	bb, err := homedir.Expand(bb)
+	if err != nil {
+		return xerrors.Errorf("expanding base path: %w", err)
+	}
+
+	bb, err = filepath.Abs(bb)
+	if err != nil {
+		return xerrors.Errorf("getting absolute base path: %w", err)
+	}
+
+	fpath, err = homedir.Expand(fpath)
+	if err != nil {
+		return xerrors.Errorf("expanding file path: %w", err)
+	}
+
+	fpath, err = filepath.Abs(fpath)
+	if err != nil {
+		return xerrors.Errorf("getting absolute file path: %w", err)
+	}
+
+	if !strings.HasPrefix(fpath, bb) {
+		return xerrors.Errorf("backup file name (%s) must be inside base path (%s)", fpath, bb)
+	}
+
+	out, err := os.OpenFile(fpath, os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return xerrors.Errorf("open %s: %w", fpath, err)
+	}
+
+	if err := bds.Backup(out); err != nil {
+		if cerr := out.Close(); cerr != nil {
+			log.Errorw("error closing backup file while handling backup error", "closeErr", cerr, "backupErr", err)
+		}
+		return xerrors.Errorf("backup error: %w", err)
+	}
+
+	if err := out.Close(); err != nil {
+		return xerrors.Errorf("closing backup file: %w", err)
+	}
+
+	return nil
+}
+
 var _ api.StorageMiner = &StorageMinerAPI{}