# 恢复configsvr副本集
#### 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
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。 
   1. 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}
      ```
      
   
   2. 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/
      
   
   3. 启动进程。 ./mongod -f restoreconfig/single_40303.yaml
      
   
   
   
   
2. 连接单节点，执行配置命令。 
   连接命令：./mongo --host 127.0.0.1 --port 40303
   1. 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)
      
   
   2. 执行如下命令，清理内置账号。 db.getSiblingDB('admin').dropAllUsers();
      db.getSiblingDB('admin').dropAllRoles();
      
   
   3. 执行如下命令，更新dds 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({});
      
   
   4. 执行如下命令，关闭单节点进程。 db.getSiblingDB('admin').shutdownServer();
      
    
   
   
3. 搭建configsvr副本集。 
   1. 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/
      
   
   2. 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}
      ```
      
   
   
   
   3. 启动进程。 ./mongod -f restoreconfig/configsvr_40303.yaml
      
   
   4. 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}
      ```
      
   
   5. 启动进程 ./mongod -f restoreconfig/configsvr_40304.yaml
      
   
   6. 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: 40305
        unixDomainSocket: {enabled: false}
      processManagement: {fork: true, pidFilePath: /compile/cluster-restore/cfg3/configsvr.pid}
      replication: {replSetName: config}
      sharding: {archiveMovedChunks: false, clusterRole: configsvr}
      storage:
        dbPath: /compile/cluster-restore/cfg3/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/cfg3/log/configsvr.log}
      ```
      
   
   7. 启动进程。 ./mongod -f restoreconfig/configsvr_40305.yaml
      
   
   
   
   
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。