Help Center> Document Database Service> User Guide> Data Restorations> Restoring Data to an On-Premises Database> Restoring a Cluster Backup to an On-premises Database> Restoring the shardsvr1 Replica Set
Updated on 2022-08-01 GMT+08:00
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Restoring the shardsvr1 Replica Set

Preparing Directories

rm -rf /compile/cluster-restore/shd1*

mkdir -p /compile/cluster-restore/shd11/data/db

mkdir -p /compile/cluster-restore/shd11/log

mkdir -p /compile/cluster-restore/shd12/data/db

mkdir -p /compile/cluster-restore/shd12/log

mkdir -p /compile/cluster-restore/shd13/data/db

mkdir -p /compile/cluster-restore/shd13/log

Procedure

  1. Prepare the configuration file and directory of a single node and start the process in single-node mode.

    1. The configuration file is as follows (restoreconfig/single_40306.yaml):
      net:
  bindIp: 127.0.0.1
  port: 40306
  unixDomainSocket: {enabled: false}
processManagement: {fork: true, pidFilePath: /compile/cluster-restore/shd11/mongod.pid}
storage:
  dbPath: /compile/cluster-restore/shd11/data/db/
  directoryPerDB: true
  engine: wiredTiger
  wiredTiger:
    collectionConfig: {blockCompressor: snappy}
    engineConfig: {directoryForIndexes: true, journalCompressor: snappy}
    indexConfig: {prefixCompression: true}
systemLog: {destination: file, logAppend: true, logRotate: reopen, path: /compile/cluster-restore/shd11/log/mongod.log}
    2. Copy the decompressed shardsvr1 file to the dbPath directory on the single node.

      cp -aR

      /compile/download/backups/cac1efc8e65e42ecad8953352321bfeein02_6cfa6167d4114d7c8cec5b47f9a78dc5no02/* /compile/cluster-restore/shd11/data/db/

    3. Start the process.

      ./mongod -f restoreconfig/single_40306.yaml

  2. Connect to the single node and run the following configuration command:

    Connection command: ./mongo --host 127.0.0.1 --port 40306

    1. Run the following commands to modify the replica set configuration:

      var cf=db.getSiblingDB('local').system.replset.findOne();

      cf['members'][0]['host']='127.0.0.1:40306';

      cf['members'][1]['host']='127.0.0.1:40307';

      cf['members'][2]['host']='127.0.0.1:40308';

      cf['members'][0]['hidden']=false;

      cf['members'][1]['hidden']=false;

      cf['members'][2]['hidden']=false;

      cf['members'][0]['priority']=1;

      cf['members'][1]['priority']=1;

      cf['members'][2]['priority']=1;

      db.getSiblingDB('local').system.replset.remove({});

      db.getSiblingDB('local').system.replset.insert(cf)

    2. Run the following commands to clear the built-in accounts:

      db.getSiblingDB('admin').dropAllUsers();

      db.getSiblingDB('admin').dropAllRoles();

    3. Run the following commands to update the configsvr information:

      Connection command: ./mongo --host 127.0.0.1 --port 40306

      var vs = db.getSiblingDB('admin').system.version.find();

      while (vs.hasNext()) {

      var curr = vs.next();

      if (curr.hasOwnProperty('configsvrConnectionString')) {

      db.getSiblingDB('admin').system.version.update({'_id' : curr._id}, {$set: {'configsvrConnectionString': 'config/127.0.0.1:40303,127.0.0.1:40304,127.0.0.1:40305'}});

      }

      }

    4. Run the following command to stop the single-node process:

      db.getSiblingDB('admin').shutdownServer();

  3. Create the shardsvr1 replica set.

    1. Copy the dbPath file of the shardsvr1 node to the directories of the other two shardsvr nodes.

      cp -aR /compile/cluster-restore/shd11/data/db/ /compile/cluster-restore/shd12/data/db/

      cp -aR /compile/cluster-restore/shd11/data/db/ /compile/cluster-restore/shd13/data/db/

    2. Add the replica set configuration attribute to the configuration file (restoreconfig/shardsvr_40306.yaml) of the shardsvr1-1 node.

      --- For details about the value of replication.replSetName, see the shard _id information in 2.c.

      net:
  bindIp: 127.0.0.1
  port: 40306
  unixDomainSocket: {enabled: false}
processManagement: {fork: true, pidFilePath: /compile/cluster-restore/shd11/mongod.pid}
replication: {replSetName: shard_1}
sharding: {archiveMovedChunks: false, clusterRole: shardsvr}
storage:
  dbPath: /compile/cluster-restore/shd11/data/db/
  directoryPerDB: true
  engine: wiredTiger
  wiredTiger:
    collectionConfig: {blockCompressor: snappy}
    engineConfig: {directoryForIndexes: true, journalCompressor: snappy}
    indexConfig: {prefixCompression: true}
systemLog: {destination: file, logAppend: true, logRotate: reopen, path: /compile/cluster-restore/shd11/log/mongod.log}
    3. Start the process.

      ./mongod -f restoreconfig/shardsvr_40306.yaml

    4. Add the replica set configuration attribute to the configuration file (restoreconfig/shardsvr_40307.yaml) of the shardsvr1-2 node.

      --- For details about the value of replication.replSetName, see the shard _id information in 2.c.

      net:
  bindIp: 127.0.0.1
  port: 40307
  unixDomainSocket: {enabled: false}
processManagement: {fork: true, pidFilePath: /compile/cluster-restore/shd12/mongod.pid}
replication: {replSetName: shard_1}
sharding: {archiveMovedChunks: false, clusterRole: shardsvr}
storage:
  dbPath: /compile/cluster-restore/shd12/data/db/
  directoryPerDB: true
  engine: wiredTiger
  wiredTiger:
    collectionConfig: {blockCompressor: snappy}
    engineConfig: {directoryForIndexes: true, journalCompressor: snappy}
    indexConfig: {prefixCompression: true}
systemLog: {destination: file, logAppend: true, logRotate: reopen, path: /compile/cluster-restore/shd12/log/mongod.log}
    5. Start the process.

      ./mongod -f restoreconfig/shardsvr_40307.yaml

    6. Add the replica set configuration attribute to the configuration file (restoreconfig/shardsvr_40308.yaml) of the shardsvr1-3 node.

      --- For details about the value of replication.replSetName, see the shard _id information in 2.c.

      net:
  bindIp: 127.0.0.1
  port: 40308
  unixDomainSocket: {enabled: false}
processManagement: {fork: true, pidFilePath: /compile/cluster-restore/shd13/mongod.pid}
replication: {replSetName: shard_1}
sharding: {archiveMovedChunks: false, clusterRole: shardsvr}
storage:
  dbPath: /compile/cluster-restore/shd13/data/db/
  directoryPerDB: true
  engine: wiredTiger
  wiredTiger:
    collectionConfig: {blockCompressor: snappy}
    engineConfig: {directoryForIndexes: true, journalCompressor: snappy}
    indexConfig: {prefixCompression: true}
systemLog: {destination: file, logAppend: true, logRotate: reopen, path: /compile/cluster-restore/shd13/log/mongod.log}
    7. Start the process.

      ./mongod -f restoreconfig/shardsvr_40308.yaml

  4. Wait until the primary node is selected.

    ./mongo --host 127.0.0.1 --port 40306

    Run the rs.status() command to check whether the primary node exists.