Unable to back up large container: Acronis Error: Module=0 Code=0, Tag=0 : CloudBlue Technical Support

Symptoms

Container backup fails with Acronis Error: Module=0, Error=0, Tag=0:
[root@mypvcserver log]# vzabackup localhost
Starting backup operation for node 'mypvcserver.mydomain.com'...
* Operation with the Container(s) srv.mydomain.com,#101,ns1.mydomain.com is started
* Backing up environment srv.mydomain.com locally
* Checking parameters
* Dumping quota
* Creating backup 8a33d65b-98f5-1643-bb3f-6e0ec6b6e260/20120414064310
* Adjusting backup type (full)
* Backup storage: receiving backup file
* Preparing for backup operation
* Operation with the Container(s) srv.mydomain.com,#101,ns1.mydomain.com is finished with errors: Failed to perform the file backup
Acronis Error: Module=0 Code=0, Tag=0,.
Backup operation for node 'mypvcserver.mydomain.com' failed: Failed to perform the file backup
Acronis Error: Module=0 Code=0, Tag=0,
Backup failed

Cause

Parallels Virtual Automation backup tools use the /tmp partition for storing B-tree data for the file system of the container being backed up. If the container is rather big, the temporary file may require more free space in /tmp.

Resolution

There are two ways to resolve the issue:

Bind-mount the /tmp partition onto a larger partition:
```
# mkdir /vz/temp
# mount --bind /vz/temp /tmp
```
In order to preserve such behavior after a server reboot, add the corresponding record to /etc/fstab, e.g.:
```
# echo "/vz/temp /tmp none bind 0 0" >> /etc/fstab
```

Change temporary storage location in PVA Agent backup plugin configuration (as of PVA 4.6.4 update 4 or 6.0):

Edit /opt/pva/agent/plugins/VZABackupLibClient/VZABackupLibClient.voc

Append parameter/load/params section for vzlin_backup_serializer11 with envp variables so the resulting section will look in a following way:

    <!-- vzlpl stuff -->
    <parameter>
            <id>vzlin_backup_serializer11</id>
            <category>plugins</category>
            <short>Virtuozzo Backup plugin</short>
            <load>
                    <params xsi:type="plugin_params_externType">
                            <type>extern</type>
                            <path>vzlpl</path>
                            <arguments>
                                    <argv>VZABackupLibClient/VZABackupLibClient.so</argv>
                                    <argv>vzlin_backup_serializer11</argv>
                            </arguments>
                            <!-- Environment variables-->
                            <envp>
                                    <item>
                                            <name>ACRONIS_TMP_PATH</name>
                                            <value>/vz/tmp</value>
                                    </item>
                            </envp>
                    </params>
            </load>

Restart PVA Agent

Related KB articles:

8133 How to increase PVA Agent timeouts for backup operations

113790 PVA Backup: Servers, roles, and processes

113801 Unable to back up a container with old layout: Acronis Error: Module=0 Code=0, Tag=0

113794 Unable to back up containers on LVM over iSCSI