准备目录

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

mkdir -p /compile/cluster-restore/cfg1/data/db

mkdir -p /compile/cluster-restore/cfg1/log

mkdir -p /compile/cluster-restore/cfg2/data/db

mkdir -p /compile/cluster-restore/cfg2/log

mkdir -p /compile/cluster-restore/cfg3/data/db

mkdir -p /compile/cluster-restore/cfg3/log

操作步骤

步骤 1 准备单节点配置文件和数据目录，以单节点方式启动进程。

• 配置文件如下（restoreconfig/single_40303.yaml）。

net: 
  bindIp: 127.0.0.1 
  port: 40303 
  unixDomainSocket: {enabled: false} 
processManagement: {fork: true, pidFilePath: /compile/cluster-restore/cfg1/configsvr.pid} 
storage: 
  dbPath: /compile/cluster-restore/cfg1/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/cfg1/log/configsingle.log}

准备数据，将解压后的configsvr文件拷贝到单节点dbPath目录下。

cp -aR

/compile/download/backups/cac1efc8e65e42ecad8953352321bfeein02_41c8a32fb10245899708dea453a8c5c9no02/* /compile/cluster-restore/cfg1/data/db/

启动进程。

./mongod -f restoreconfig/single_40303.yaml

步骤 2 连接单节点，执行配置命令。

连接命令：./mongo --host 127.0.0.1 --port 40303

执行如下命令，修改副本集配置信息。

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

cf['members'][0]['host']='127.0.0.1:40303';

cf['members'][1]['host']='127.0.0.1:40304';

cf['members'][2]['host']='127.0.0.1:40305';

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)

执行如下命令，清理内置账号。

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

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

执行如下命令，更新mongos和shard信息。

db.getSiblingDB('config').mongos.remove({});

先查询config.shards表中的多个shard的_id信息，用于下面语句的_id的查询条件。逐个更新每条记录。

db.getSiblingDB('config').shards.update({'_id' : 'shard_1'},{$set: {'host': 'shard_1/127.0.0.1:40306,127.0.0.1:40307,127.0.0.1:40308'}})

db.getSiblingDB('config').shards.update({'_id' : 'shard_2'},{$set: {'host': 'shard_2/127.0.0.1:40309,127.0.0.1:40310,127.0.0.1:40311'}})

db.getSiblingDB('config').mongos.find({});

db.getSiblingDB('config').shards.find({});

执行如下命令，关闭单节点进程。

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

步骤 3 搭建configsvr副本集。

准备副本集配置文件和目录，将configsvr1节点的dbPath文件拷贝到其他两个节点目录下。

cp -aR /compile/cluster-restore/cfg1/data/db/ /compile/cluster-restore/cfg2/data/db/

cp -aR /compile/cluster-restore/cfg1/data/db/ /compile/cluster-restore/cfg3/data/db/

修改configsvr-1节点配置文件，增加副本集配置属性（restoreconfig/configsvr_40303.yaml）。

net: 
  bindIp: 127.0.0.1 
  port: 40303 
  unixDomainSocket: {enabled: false} 
processManagement: {fork: true, pidFilePath: /compile/cluster-restore/cfg1/configsvr.pid} 
replication: {replSetName: config} 
sharding: {archiveMovedChunks: false, clusterRole: configsvr} 
storage: 
  dbPath: /compile/cluster-restore/cfg1/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/cfg1/log/configsvr.log}

启动进程。

./mongod -f restoreconfig/configsvr_40303.yaml

修改configsvr-2节点配置文件，增加副本集配置属性（restoreconfig/configsvr_40304.yaml）。

net: 
  bindIp: 127.0.0.1 
  port: 40304 
  unixDomainSocket: {enabled: false} 
processManagement: {fork: true, pidFilePath: /compile/cluster-restore/cfg2/configsvr.pid} 
replication: {replSetName: config} 
sharding: {archiveMovedChunks: false, clusterRole: configsvr} 
storage: 
  dbPath: /compile/cluster-restore/cfg2/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/cfg2/log/configsvr.log}

启动进程

./mongod -f restoreconfig/configsvr_40304.yaml

修改configsvr-3节点配置文件，增加副本集配置属性（restoreconfig/configsvr_40305.yaml）。

net: 
  bindIp: 127.0.0.1 
  port: 40304 
  unixDomainSocket: {enabled: false} 
processManagement: {fork: true, pidFilePath: /compile/cluster-restore/cfg2/configsvr.pid} 
replication: {replSetName: config} 
sharding: {archiveMovedChunks: false, clusterRole: configsvr} 
storage: 
  dbPath: /compile/cluster-restore/cfg2/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/cfg2/log/configsvr.log}

启动进程。

./mongod -f restoreconfig/configsvr_40305.yaml

步骤 4 等待选主成功。

./mongo --host 127.0.0.1 --port 40303

执行命令rs.status()，查看是否已存在主节点Primary。