On 03/03/2012 09:39 PM, Les Mikesell wrote:
> On Sat, Mar 3, 2012 at 8:04 PM, Erik Shreve<lists AT erikshreve DOT com>
> wrote:
>>
>> On 03/03/2012 05:08 PM, Les Mikesell wrote:
>>> On Sat, Mar 3, 2012 at 4:07 PM, Erik Shreve<lists AT erikshreve DOT com>
>>> wrote:
>>>> I got a notice this morning that none of my machines had ever been
>>>> backed up. It looks like backups stopped earlier this week and BackupPC
>>>> could no longer see any of the older backups. However, checking the
>>>> TopDir location showed plenty of files.
>>>>
>>>> I saw another post that suggested running BackupPC_fixupBackupSummary
>>>> for the hosts. I did this and via the web interface I can now see the
>>>> previous backups. However, when browsing those backups, if I click on a
>>>> file I get a 0 byte file.
>>>>
>>>>
>>>> Any tips on how to
>>>> A) Verify the file data is actually still on the disk.
>>>> B) Fix the links so that the file data is downloaded.
>>>> C) Troubleshoot what happened to blow away the backups in the first place
>>> Could you have run out of disk space? Backuppc won't start a backup
>>> if your disk is over 95% (configurable) full, but depending on the
>>> circumstances that might not have left enough room for it to complete.
>>>
>> Disk has plenty of space left. It is possible the disk was unavailable
>> at some point, however. Yet not starting a backup shouldn't corrupt the
>> information on the previous backups. And I would think an unfinished
>> backup would also not corrupt previous backup data?
> No, but if your disk is small, starting with 5% freel might not have
> been enough to hold the results of a large target so you could have
> new directory entries created with no space to write or to save the
> attrib files. Try going back to older versions in the archive
> directory and see if the BackupPC_zcat command line tool can extract
> the files.
>
The zcat command line tool was not able to extract a file. I got no
error message but the output was a 0 byte file.
Disk usage appears to have been about 60% based on the BackupPC logs at
the time of the last successful backup. The free space is several times
that of the overall pool size.
Looking at the backuppc logs, however, it appears that on the morning of
the 29th (last successful backups were on the 28th) some weirdness occurred:
2012-02-29 06:32:46 Reading hosts file
2012-02-29 06:32:46 BackupPC started, pid 2839
2012-02-29 06:32:46 Running BackupPC_trashClean (pid=2844)
2012-02-29 06:32:46 Next wakeup is 2012-02-29 07:00:00
2012-02-29 06:35:35 Reading hosts file
2012-02-29 06:35:35 BackupPC started, pid 2881
2012-02-29 06:35:35 Reading hosts file
2012-02-29 06:35:35 BackupPC started, pid 2887
2012-02-29 06:35:35 Running BackupPC_trashClean (pid=2888)
2012-02-29 06:35:35 Running BackupPC_trashClean (pid=2889)
2012-02-29 06:35:35 Next wakeup is 2012-02-29 07:00:00
2012-02-29 06:35:35 Next wakeup is 2012-02-29 07:00:00
2012-02-29 07:00:00 24hr disk usage: 59% max, 59% recent, 0 skipped hosts
2012-02-29 07:00:00 Removing /var/lib/backuppc/log/LOG.13.z
2012-02-29 07:00:00 24hr disk usage: 59% max, 59% recent, 0 skipped hosts
2012-02-29 07:00:00 Aging LOG files, LOG -> LOG.0 -> LOG.1 -> ... -> LOG.13
2012-02-29 07:00:00 Aging LOG files, LOG -> LOG.0 -> LOG.1 -> ... -> LOG.13
The machine was rebooted twice that morning and it looks like two
instances of BackupPC may have been started on the 2nd boot (which
occurred at 6:34 according to the syslog).
I ran some tests and it appears that the system is always trying to
start two instances of BackupPC upon boot. However, most of the time the
2nd instance doesn't start because the first one is seen. In this case
both instances were able to start (race condition?). Probably a bug in
my custom Upstart script used to start BackupPC. I'll have to dig into
that on my own.
Thank you for your help Les.
Erik
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