Export Data

The cloud database MongoDB provides automatic backup and manual backup functions. To export data, you can download the backup file and export it to the local database.

Please pay attention to whether the backup mode of the current backup is physical backup or logical backup when it is exported. Their recovery methods are different.

Operation Steps

1. Log in MongoDB Console.

2. On the "Instance List" page, select the target instance and click Instance Name to go to the "Instance Details" page.

3. Click Backup and Restore on the Instance Details page to view the backup data.

   

4. Select the backup you want to download, and click Download in the action item to open the download pop-up window.

   

5. Download the backup file locally.

   Description

   • The validity period of intranet address and Internet address is 24 hours.
   • English quotation marks shall be added to URL when download using wget
   • 2. If the virtual machine is in the same region with the cloud database, you are recommended to use the Intranet address for downloading;

6. Import the backup file to the local database.

   • Please execute the following command when the backup is a logical.

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       mongorestore --host xxx --port=27017 --authenticationDatabase admin --archive=xxx(file path) --gzip -u root -p xxx
       

   • Please follow the steps below when the backup is physical.

     1. Unzip the backup file to the specified path
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       tar -C /xxx/data (mongod data storage path) -xf /yyy/mongo-xxxx.tar (backup file download path)
       

     2. Single Node Mode Start mongod Execute the following command to create a new configuration file mongod.conf in the /root/mongo folder:
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       touch /root/mongo/mongod.conf
       

     Enter vi /root/mongo/mongod.conf in the command line to open the mongod.conf file, edit it, save and exit when done: (WiredTiger storage engine)
     

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       systemLog:
           destination: file
           path: /home/Logs/mongod.log
           logAppend: true
       security:
           authorization: enabled
       storage:
           dbPath: /home/data
           directoryPerDB: true
       net:
           port: 27017
           unixDomainSocket:
           enabled: false
       processManagement:
           fork: true
           pidFilePath: /home/var/mongod.pid
       

     Specify the newly created configuration file mongod.conf to start MongoDB:
     

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       mongod -f /root/mongo/mongod.conf
       

     3. Log in to mongo through mongo shell, delete local database
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       mongo [--options]
       use local
       db.dropDatabase()
       

     4. Start the current node by the method of replica set Modify configuration file on all nodes:
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       bind_ip = ::,0.0.0.0
       port = 27017
       ipv6 = true
       fork = false
       pidfilepath = /home/var/mongod.pid
       logappend = true
       dbpath = /home/data
       logpath = /home/Logs/mongod.log
       maxConns = 500
       replSet = rs0
       keyFile = /home/etc/mongodb.key
       timeStampFormat = iso8601-local
       unixSocketPrefix = /home/var
       auth = true
       wiredTigerCacheSizeGB = 1
       directoryperdb = true
       setParameter = replWriterThreadCount=32
       

     Start the service in the background separately on all nodes:

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       mongod --config /var/jmiss_mongo/config/mongod.conf &
       

     5. Log in to mongo through mongo shell, use rs.initiate() on one and only one member of replica set
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       mongo [--options]
       
       rs.initiate( {
        		 _id : <replName>,
          		members: [ { _id : 0, host : <host:port> } ]
       })
       

     [rs.initiate()Usage](https://docs.mongodb.com/master/reference/method/rs.initiate/#rs.initiate)
     

     6. Add a new member to the replica set (please make sure that the data in the newly added member -- dbpath directory is null)
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       rs.add()
       

     [rs.add()Usage](https://docs.mongodb.com/master/reference/method/rs.add/#rs.add)
     
     [MongoDB Replica Set Recovery Official Reference Document](https://docs.mongodb.com/master/tutorial/restore-replica-set-from-backup/)
     

Related References

• Import Data