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FusionInsight HD 6.5.0 Administrator Guide 02

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Backing Up ZooKeeper Data

Backing Up ZooKeeper Data

Scenario

To ensure security of service data stored in ZooKeeper or before and after a critical operation (such as upgrade or migration) on ZooKeeper, ZooKeeper data needs to be backed up. The backup data can be used to restore the system if an exception occurs or the operation has not achieved the expected result, minimizing the reverse impact on services.

The system administrator can create a task for backing up ZooKeeper service data on FusionInsight Manager and back up data. To prevent the ZooKeeper service data from being severely affected, manually back up data.

Prerequisites

  • You have checked that HDFS services have been deployed in the current cluster.
  • You have checked whether HDFS of the standby cluster has sufficient space. It is recommended the directory for storing backup files be a user-defined directory.
  • For details about how to log in to FusionInsight Manager, see Logging In to FusionInsight Manager.

Procedure

  1. On FusionInsight Manager, choose O&M > Backup and Restoration > Backup Management.
  2. Click Create.
  3. Set Name to the name of the backup task.
  4. Set Mode to the type of the backup task. Periodic indicates that the backup task is periodically executed and Manual indicates that the backup task is manually executed.

    To create a periodic backup task, set the following parameters in addition to the preceding parameters:

    • Start Time: indicates the time when the task is started for the first time.
    • Period: indicates task execution interval. The options include By Hours and By Days.
    • Backup Policy: indicates the volume of data to be backed up in each task execution. The options include Full backup at the first time and incremental backup subsequently, Full backup every time, and Full backup once every n times. When the parameter is set to Full backup once every n times, n must be specified.

  5. Set Configuration to ZooKeeper.
  6. Set Path Type of ZooKeeper to a backup directory type.

    The following backup directory types are supported:

    • RemoteHDFS: indicates that the backup files are stored in the HDFS directory of the standby cluster. If you select this value, you need to set the following parameters:
      • Target NameNode IP Address: indicates the NameNode service plane IP address of the standby cluster, supporting the active node or standby node.
      • Target Path: indicates the full path of the HDFS directory for storing standby cluster backup data. for example, backup path/backup task name_data source_task creation time/version_data source_task execution time.tar.gz.
      • Maximum Number of Backup Copies: indicates the number of backup files that can be retained in the backup directory.
      • NameService Name: indicates the NameService that corresponds to the selected backup directory. The default value of this parameter is hacluster.
    • NFS: indicates that backup files are stored in the NAS over the NFS protocol. If you select NFS, set the following parameters:
      • Server IP Address: indicates the NAS server IP address.
      • Maximum Number of Backup Copies: indicates the number of backup files that can be retained in the backup directory.
      • Server Shared Path: indicates the configured shared directory on the NAS server.
      • NameService Name: indicates the NameService that corresponds to the selected backup directory. The default value of this parameter is hacluster.
    • CIFS: indicates that backup files are stored in the NAS over the CIFS protocol. If you select CIFS, set the following parameters:
      • Server IP Address: indicates the NAS server IP address.
      • Port: indicates the port ID used by the CIFS protocol to connect to the NAS server. The default value is 445.
      • Username: indicates the user name that is configured when setting the CIFS protocol.
      • Password: indicates the password that is configured when setting the CIFS protocol.
      • Maximum Number of Backup Copies: indicates the number of backup files that can be retained in the backup directory.
      • Server Shared Path: indicates the configured shared directory on the NAS server.
      • NameService Name: indicates the NameService that corresponds to the selected backup directory. The default value of this parameter is hacluster.

  7. Set Maximum number of recovery points to the number of snapshots that can be retained in the cluster.
  8. Set Backup object to one or multiple ZooKeeper directories to be backed up based on service requirements.

    The following methods are supported to select backup data:

    • Select directly

      Click the name of a directory in the navigation tree to show all the subdirectories in the directory, and select specified directories.

    • Select using regular expressions
      • Click Query Regular Expression.
      • Enter the parent directory full path of the directory in the first text box as prompted. The directory must be the same as the existing directory, for example, /hadoop.
      • Enter a regular expression in the second text box. Standard regular expressions are supported. For example, if all files or subdirectories in the parent directory need to be filtered, enter ([\s\S]*?). If files of which the names consisting of letters and digits, such as file1, need to be filtered, enter file\d*.
      • Click Refresh to view the selected tables in Directory Name.
      • Click Synchronize to save the result.
    NOTE:
    • When entering regular expressions, you can click or to add or delete an expression.
    • If the selected table or directory is incorrect, click Clear Selected Node to deselect it.

  9. Click OK to save the settings.
  10. In the Operation column of the created task in the backup task list, choose More > Back Up Now to execute the backup task.

    After the backup task is executed, the system automatically creates a subdirectory for each backup task in the backup directory. The format of the subdirectory name is backup task name_data source_task creation time, and the subdirectory is used to save latest data source backup files. All the backup file sets are saved to the related snapshot directories.

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Updated: 2019-05-17

Document ID: EDOC1100074522

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