github.com/ewagmig/fabric@v2.1.1+incompatible/core/ledger/kvledger/drop_dbs.go (about)

     1  /*
     2  Copyright IBM Corp. All Rights Reserved.
     3  
     4  SPDX-License-Identifier: Apache-2.0
     5  */
     6  
     7  package kvledger
     8  
     9  import (
    10  	"os"
    11  
    12  	"github.com/pkg/errors"
    13  )
    14  
    15  func dropDBs(rootFSPath string) error {
    16  	// During block commits to stateDB, the transaction manager updates the bookkeeperDB and one of the
    17  	// state listener updates the config historyDB. As we drop the stateDB, we need to drop the
    18  	// configHistoryDB and bookkeeperDB too so that during the peer startup after the reset/rollback,
    19  	// we can get a correct configHistoryDB.
    20  	// Note that it is necessary to drop the stateDB first before dropping the config history and
    21  	// bookkeeper. Suppose if the config or bookkeeper is dropped first and the peer reset/rollback
    22  	// command fails before dropping the stateDB, peer cannot start with consistent data (if the
    23  	// user decides to start the peer without retrying the reset/rollback) as the stateDB would
    24  	// not be rebuilt.
    25  	if err := dropStateLevelDB(rootFSPath); err != nil {
    26  		return err
    27  	}
    28  	if err := dropConfigHistoryDB(rootFSPath); err != nil {
    29  		return err
    30  	}
    31  	if err := dropBookkeeperDB(rootFSPath); err != nil {
    32  		return err
    33  	}
    34  	if err := dropHistoryDB(rootFSPath); err != nil {
    35  		return err
    36  	}
    37  	return nil
    38  }
    39  
    40  func dropStateLevelDB(rootFSPath string) error {
    41  	stateLeveldbPath := StateDBPath(rootFSPath)
    42  	logger.Infof("Dropping StateLevelDB at location [%s] ...if present", stateLeveldbPath)
    43  	return os.RemoveAll(stateLeveldbPath)
    44  }
    45  
    46  func dropConfigHistoryDB(rootFSPath string) error {
    47  	configHistoryDBPath := ConfigHistoryDBPath(rootFSPath)
    48  	logger.Infof("Dropping ConfigHistoryDB at location [%s]", configHistoryDBPath)
    49  	err := os.RemoveAll(configHistoryDBPath)
    50  	return errors.Wrapf(err, "error removing the ConfigHistoryDB located at %s", configHistoryDBPath)
    51  }
    52  
    53  func dropBookkeeperDB(rootFSPath string) error {
    54  	bookkeeperDBPath := BookkeeperDBPath(rootFSPath)
    55  	logger.Infof("Dropping BookkeeperDB at location [%s]", bookkeeperDBPath)
    56  	err := os.RemoveAll(bookkeeperDBPath)
    57  	return errors.Wrapf(err, "error removing the BookkeeperDB located at %s", bookkeeperDBPath)
    58  }
    59  
    60  func dropHistoryDB(rootFSPath string) error {
    61  	historyDBPath := HistoryDBPath(rootFSPath)
    62  	logger.Infof("Dropping HistoryDB at location [%s] ...if present", historyDBPath)
    63  	return os.RemoveAll(historyDBPath)
    64  }