Restoring the shardsvr2 Replica Set

Preparing Directories

rm -rf /compile/cluster-restore/shd2*

mkdir -p /compile/cluster-restore/shd21/data/db

mkdir -p /compile/cluster-restore/shd21/log

mkdir -p /compile/cluster-restore/shd22/data/db

mkdir -p /compile/cluster-restore/shd22/log

mkdir -p /compile/cluster-restore/shd23/data/db

mkdir -p /compile/cluster-restore/shd23/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_40309.yaml):

      net:
        bindIp: 127.0.0.1
        port: 40309
        unixDomainSocket: {enabled: false}
      processManagement: {fork: true, pidFilePath: /compile/cluster-restore/shd21/mongod.pid}
      storage:
        dbPath: /compile/cluster-restore/shd21/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/shd21/log/mongod.log}
   1. Copy the decompressed shardsvr2 file to the dbPath directory on the single node.

      cp -aR

      /compile/download/backups/cac1efc8e65e42ecad8953352321bfeein02_92b196d2401041a7af869a2a3cab7079no02/* /compile/cluster-restore/shd21/data/db/

   2. Start the process.

      ./mongod -f restoreconfig/single_40309.yaml

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

   Connection command: ./mongo --host 127.0.0.1 --port 40309

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

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

      cf['members'][0]['host']='127.0.0.1:40309';

      cf['members'][1]['host']='127.0.0.1:40310';

      cf['members'][2]['host']='127.0.0.1:40311';

      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:

      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 shardsvr2 replica set.
   1. Copy the dbPath file of the shardsvr2 node to the directories of the other two shardsvr nodes.

      cp -aR /compile/cluster-restore/shd21/data/db/ /compile/cluster-restore/shd22/data/db/

      cp -aR /compile/cluster-restore/shd21/data/db/ /compile/cluster-restore/shd23/data/db/

   2. Add the replica set configuration attribute to the configuration file (restoreconfig/shardsvr_40309.yaml) of the shardsvr2-1 node.

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

      net:
        bindIp: 127.0.0.1
        port: 40309
        unixDomainSocket: {enabled: false}
      processManagement: {fork: true, pidFilePath: /compile/cluster-restore/shd21/mongod.pid}
      replication: {replSetName: shard_2}
      sharding: {archiveMovedChunks: false, clusterRole: shardsvr}
      storage:
        dbPath: /compile/cluster-restore/shd21/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/shd21/log/mongod.log}
   3. Start the process.

      ./mongod -f restoreconfig/shardsvr_40309.yaml

   4. Add the replica set configuration attribute to the configuration file (restoreconfig/shardsvr_40310.yaml) of the shardsvr2-2 node.

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

      net:
        bindIp: 127.0.0.1
        port: 40310
        unixDomainSocket: {enabled: false}
      processManagement: {fork: true, pidFilePath: /compile/cluster-restore/shd22/mongod.pid}
      replication: {replSetName: shard_2}
      sharding: {archiveMovedChunks: false, clusterRole: shardsvr}
      storage:
        dbPath: /compile/cluster-restore/shd22/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/shd22/log/mongod.log}
   5. Start the process.

      ./mongod -f restoreconfig/shardsvr_40310.yaml

   6. Add the replica set configuration attribute to the configuration file (restoreconfig/shardsvr_40311.yaml) of the shardsvr2-2 node.

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

      net:
        bindIp: 127.0.0.1
        port: 40311
        unixDomainSocket: {enabled: false}
      processManagement: {fork: true, pidFilePath: /compile/cluster-restore/shd23/mongod.pid}
      replication: {replSetName: shard_2}
      sharding: {archiveMovedChunks: false, clusterRole: shardsvr}
      storage:
        dbPath: /compile/cluster-restore/shd23/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/shd23/log/mongod.log}
   7. Start the process.

      ./mongod -f restoreconfig/shardsvr_40311.yaml

4. Wait until the primary node is selected.

   ./mongo --host 127.0.0.1 --port 40309

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