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Use BR to restore data

If you use the BR to back up data, you can use it to restore the data to NebulaGraph. This topic introduces how to use the BR to restore data from backup files.

Caution

During the restoration process, the data on the target NebulaGraph cluster is removed and then is replaced with the data from the backup files. If necessary, back up the data on the target cluster.

Caution

The restoration process is performed OFFLINE.

Prerequisites

To restore data with the BR, do a check of these:

  • The BR is compiled. For more information, see Compile BR.
  • Download nebula-agent and start the agent service in each cluster(including metad, storaged, graphd) host.
  • No application is connected to the target NebulaGraph cluster.
  • Make sure that the target and the source NebulaGraph clusters have the same topology, which means that they have exactly the same number of hosts. The number of data folders for each host is consistently distributed.

Procedures

  1. Users can use the following command to list the existing backup information:

    $ ./bin/br show --storage <ip_address>
    For example, run the following command to list the backup information in the local /home/nebula/backup path. 
    $ ./bin/br show --storage "local:///home/nebula/backup"
+----------------------------+---------------------+------------------------+-------------+------------+
|            NAME            |     CREATE TIME     |         SPACES         | FULL BACKUP | ALL SPACES |
+----------------------------+---------------------+------------------------+-------------+------------+
| BACKUP_2022_02_10_07_40_41 | 2022-02-10 07:40:41 | basketballplayer       | true        | true       |
| BACKUP_2022_02_11_08_26_43 | 2022-02-11 08:26:47 | basketballplayer,foesa | true        | true       |
+----------------------------+---------------------+------------------------+-------------+------------+

    Or, you can run the following command to list the backup information stored in S3 URL s3://127.0.0.1:9000/br-test/backup. 

    $ ./bin/br show --s3.endpoint "http://127.0.0.1:9000" --storage="s3://br-test/backup/" --s3.access_key=minioadmin --s3.secret_key=minioadmin --s3.region=default

    Parameter Data type Required Default value Description
    -h,-help - No None Checks help for restoration.
    -debug - No None Checks for more log information.
    -log string No "br.log" Specifies detailed log path for restoration and backup.
    --storage string Yes None The target storage URL of BR backup data. The format is: <Schema>://<PATH>.
    Schema: Optional values are local and s3.
    When selecting s3, you need to fill in s3.access_key, s3.endpoint, s3.region, and s3.secret_key.
    PATH: The path of the storage location.
    --s3.access_key string No None Sets AccessKey ID.
    --s3.endpoint string No None Sets the S3 endpoint URL, please specify the HTTP or HTTPS scheme explicitly.
    --s3.region string No None Sets the region or location to upload or download the backup.
    --s3.secret_key string No None Sets SecretKey for AccessKey ID.

  2. Run the following command to restore data.

    $ ./bin/br restore full --meta <ip_address> --storage <storage_path> --name <backup_name>

    For example, run the following command to upload the backup files from the local /home/nebula/backup/ to the cluster where the meta service's address is 127.0.0.1:9559.

    $ ./bin/br restore full --meta "127.0.0.1:9559" --storage "local:///home/nebula/backup/" --name BACKUP_2021_12_08_18_38_08

    Or, you can run the following command to upload the backup files from the S3 URL s3://127.0.0.1:9000/br-test/backup. 

    $ ./bin/br restore full --meta "127.0.0.1:9559" --s3.endpoint "http://127.0.0.1:9000" --storage="s3://br-test/backup/" --s3.access_key=minioadmin --s3.secret_key=minioadmin --s3.region="default" --name BACKUP_2021_12_08_18_38_08

    If the following information is returned, the data is restored successfully. 

    Restore succeed.

    Caution

    If your new cluster hosts' IPs are not all the same as the backup cluster, after restoration, you should run add hosts to add the Storage host IPs in the new cluster one by one.

    The parameters are as follows.

    Parameter Data type Required Default value Description
    -h,-help - No None Checks help for restoration.
    -debug - No None Checks for more log information.
    -log string No "br.log" Specifies detailed log path for restoration and backup.
    -meta string Yes None The IP address and port of the meta service.
    -name string Yes None The name of backup.
    --storage string Yes None The target storage URL of BR backup data. The format is: \<Schema>://\<PATH>.
    Schema: Optional values are local and s3.
    When selecting s3, you need to fill in s3.access_key, s3.endpoint, s3.region, and s3.secret_key.
    PATH: The path of the storage location.
    --s3.access_key string No None Sets AccessKey ID.
    --s3.endpoint string No None Sets the S3 endpoint URL, please specify the HTTP or HTTPS scheme explicitly.
    --s3.region string No None Sets the region or location to upload or download the backup.
    --s3.secret_key string No None Sets SecretKey for AccessKey ID.

  3. Run the following command to clean up temporary files if any error occurred during backup. It will clean the files in cluster and external storage. You could also use it to clean up old backups files in external storage.

    $ ./bin/br cleanup --meta <ip_address> --storage <storage_path> --name <backup_name>

    The parameters are as follows.

    Parameter Data type Required Default value Description
    -h,-help - No None Checks help for restoration.
    -debug - No None Checks for more log information.
    -log string No "br.log" Specifies detailed log path for restoration and backup.
    -meta string Yes None The IP address and port of the meta service.
    -name string Yes None The name of backup.
    --storage string Yes None The target storage URL of BR backup data. The format is: \<Schema>://\<PATH>.
    Schema: Optional values are local and s3.
    When selecting s3, you need to fill in s3.access_key, s3.endpoint, s3.region, and s3.secret_key.
    PATH: The path of the storage location.
    --s3.access_key string No None Sets AccessKey ID.
    --s3.endpoint string No None Sets the S3 endpoint URL, please specify the HTTP or HTTPS scheme explicitly.
    --s3.region string No None Sets the region or location to upload or download the backup.
    --s3.secret_key string No None Sets SecretKey for AccessKey ID.
Last update: March 13, 2023
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