Date - Sept - 2010
Affected Product & Version - NetVault:Backup all versions
Affected Module & Version - File System al version
OS Version - Linux
Application Information - N/A
Symptoms:
Files System backups on 'chrooted' Red Hat clients, fail while attempting to backup /var/named/chroot/proc.
The log shows:
Severe Error 2009/07/22 19:36:26 213 Data Plugin mx2 Fatal error writing backed up data
Severe Error 2009/07/22 19:36:26 213 Data Plugin mx2 Fatal error processing children of 'proc'
Severe Error 2009/07/22 19:36:26 213 Data Plugin mx2 Fatal error processing children of 'chroot'
Severe Error 2009/07/22 19:36:26 213 Data Plugin mx2 Fatal error processing children of 'named'
Severe Error 2009/07/22 19:36:26 213 Data Plugin mx2 Fatal error processing children of 'var'
Severe Error 2009/07/22 19:36:26 213 Data Plugin mx2 Fatal error processing children of '/'
Warning 2009/07/22 19:36:26 213 Data Plugin mx2 Fatal error backing up selected item '/' or its children
Severe Error 2009/07/22 19:36:26 213 Data Plugin mx2 Failed while backing up items
Warning 2009/07/22 19:36:27 213 Data Plugin mx2 871 items were modified or in flux during backup. The items have been backed up but the data within the files may be inconsistent
NVFS trace:
2 FSUTLUNX:3666 18 0 135858 Add 'proc' to get '/var/named/chroot/proc' depth 5
2 HBBACKUP:3666 138 0 135858 HBBackupItem 'scsi' op 'Process Everything'
2 NVFSUNIX:3666 1005 0 135858 HBBackupSaveNode '/var/named/chroot/proc/scsi' 0
4 CPIO :3666 149 0 135858 Header for '/var/named/chroot/proc/scsi', size = 140
4 MEDIAFMT:3666 30 0 135858 TRUE = MediaFormatWriteFileHeader
1 NVFSUNIX:3666 1093 0 135858 Recurse TRUE
1 NVFSUNIX:3666 1059 0 135858 'scsi' from 591159168 - 591159351
2 FSUTLUNX:3666 278 0 135858 Mount type for '/var/named/chroot/proc/scsi' not found in mount list
2 NVFSUNIX:3666 996 0 135858 Name: /var/named/c
1- Under NetVault 8.5.2, the File System plugin now handles chroot environments differently.
Instead of failing the backup while attempting to backup 'in flux' objects, it skips them and produces a warning showing all the items impossible to backup.
The items that can be backed up will.
2- If backing some items of /var/named/chroot/proc is not an option there are 2 options left:
a) re-mount the bind mount without -n, allows for successful backup, but this will be overwritten at next update
e.g.: mount --bind /proc /var/named/chroot/proc >/dev/null 2>&1
b) create an exclusion list for redhat clients:
-- Create a file saved in unicode format (example /exclude.txt)
-- the file will include the following line:
/var/named/chroot/
-- copy this file locally on each 'chrooted' redhat machine
-- on the backup server open Backup
---------> open the redhat clients
---------> right click their File System plugin
---------> Configure
---------> on the field "File containing a list of path based patterns to exclude from backups" input the path to the exclusion list: /exclude.txt
This will make sure we ignore this path on 'chrooted' redhat clients during backups.
