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Backup in PVC, PSBM and Parallels Cloud Server

Article ID: 113790, created on Apr 28, 2012, last review on Aug 15, 2014

APPLIES TO:
  • Virtuozzo
  • Virtuozzo containers
  • Virtuozzo hypervisor
  • Virtual Automation

Summary

Parallels server virtualization products use Parallels Virtual Automation (PVA) for standard backup and restore operations.

Parallels Virtual Automation Agent (PVA Agent) provides backup and restore tools and an API for the particular Hardware Node it is installed on.

Parallels Virtual Automation Management Node (PVA MN) provides a centralized backup and restore API for all nodes registered in the PVA group.

This article describes the backgrounds of the backup and restore processes, the server roles in the backup and restore processes, and common terms used in PVA.

Server roles

Generally, there are three roles in a backup or restore process:

A single server can handle all three roles in the case of a local backup.

Backup scenarios

Scenario Roles Example
Local backup of mypvcserver

Virtualization node: mypvcserver

 

vzabackup -F mypvcserver -e CTID
Locally initiated backup to the remote storage

Virtualization node: myvpcserver

Backup storage node: remotestorage

Control node: myvpcserver

vzabackup --storage root@remotestorage localhost -e CTID
Backup initiated from the storage server

Virtualization node: myvpcserver

Backup storage node: remotestorage

Control node: myvpcserver

vzabackup -F mypvcserver
Backup of the server to remote storage initiated by the third server

Virtualization node: myvpcserver

Backup storage node: remotestorage

Control node: myvpcserver

vzabackup --storage root@remotestorage -F mypvcserver -e CTID

Backup tools and interfaces

  • Graphical
    1. PVA Control Center - The web interface of PVA MN, allowing you to manage backups for all Hardware Nodes in the PVA group.
    2. Power Panel - The web interface for managing a particular container. A backup initiated from the Power Panel is performed according to the local settings of the Hardware Node the container is hosted on.
    3. Parallels Management Console (obsolete) - A graphical tool shipped with older versions of Parallels Virtuozzo Containers. This allows you to perform backup and restore operations across registered nodes.
  • Command-line

    1. vzabackup\vzarestore - CLI interface to PVA Agent Backup API methods.
    2. vzbackup\vzrestore (obsolete) - CLI interface to TAR-based backup. This does not require PVA Agent to be running.

      NOTE: On Parallels Virtuozzo Containers for Windows, this is in the form of another wrapper on the vzabackup\vzarestore tool.

  • API
    1. Backup interfaces of PVA Management Node XML API.
    2. Backup interfaces of PVA Agent via SOAP and XML API.

Backup backend

Parallels provides two backends for backup files:

  1. One that is compatible with Acronis Backup and Restore (default)
  2. One that is compatible with TAR.

The backup engine backend can be switched in the PVA Agent configuration file:

  1. Edit the PVA Agent configuration file:

    /vz/pva/agent/etc/vzagent.conf

    or

    /var/opt/pva/agent/etc/vzagent.conf

  2. Change the backend value to 0 for Acronis-compatible, or 1 for TAR-based:

    • vzlin_backup_serializer (for pre-PVA 4.6.4 nodes):

      <vzlin_backup_serializer> 
      <configuration> 
      <backend>1</backend> 
      <enable_snapshot>1</enable_snapshot> 
      <custom> 
      <queue>0</queue> 
      <heavy_timeout_limit>360000</heavy_timeout_limit>
      </custom> 
      </configuration> 
      </vzlin_backup_serializer> 
      
    • vzlin_backup_serializer11 (for PVA 4.6.4 and later versions):

      <vzlin_backup_serializer11>` 
      <configuration> 
      <backend>1</backend> 
      <enable_snapshot>1</enable_snapshot> 
      <custom> 
      <pool>0</pool> 
      <queue>0</queue> 
      <heavy_timeout_limit>360000</heavy_timeout_limit>
      </custom> 
      </configuration> 
      </vzlin_backup_serializer11>
      
  3. Restart PVA Agent:

    ~# pvaagent restart
    

Additional information

How to increase PVA Agent timeouts for backup operations

Acronis Error: Module=0 Code=0, Tag=0 troubleshooting

Parallels Virtual Automation builds, releases, and supported virtualization products

Search words:

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vzabackup




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