Re: [Duplicity-talk] Backup fails only from cron

[Adam Huffman]

On Fri, Jul 30, 2010 at 12:23 PM, Kenneth Loafman <address@hidden> wrote:
> Hi,
>
> cron runs as root, so I'm guessing that your SSH key is under your user,
> not root.
>
> The way I handle it is to use a ~/.ssh/config file with contents like:
> # cat .ssh/config
> IdentityFile /home/ken/.ssh/id_rsa
> IdentityFile /home/ken/.ssh/id_dsa
>

Thanks for the very prompt replies.  As usually happens, stating the
problem on a mailing list led to the solution.  Even though it wasn't
exactly what you suggested, you both pointed me in the right
direction, so thanks.  It's working now.

Adam

> ...Ken
>
> address@hidden wrote:
>> How are you telling ssh the password for your key (when run by cron)?
>>
>> ..ede/duply.net
>>
>>
>> On 30.07.2010 13:08, Adam Huffman wrote:
>>> I'm trying to setup automated backups via cron on a Fedora 13 system,
>>> connecting to a Centos 5.5 server.
>>>
>>> When I run the simple script interactively, it works fine, using an
>>> SSH key to connect to the server.
>>>
>>> When I schedule the script via cron it fails with the "Invalid SSH
>>> password" error.
>>>
>>> Here's the traceback:
>>>
>>>
>>> Backend error detail: Traceback (most recent call last):
>>>    File "/usr/bin/duplicity", line 1239, in<module>
>>>      with_tempdir(main)
>>>    File "/usr/bin/duplicity", line 1232, in with_tempdir
>>>      fn()
>>>    File "/usr/bin/duplicity", line 1133, in main
>>>      sync_archive()
>>>    File "/usr/bin/duplicity", line 910, in sync_archive
>>>      remlist = globals.backend.list()
>>>    File
>>> "/usr/lib64/python2.6/site-packages/duplicity/backends/sshbackend.py",
>>> line 270, in list
>>>      l = self.run_sftp_command(commandline, commands).split('\n')[1:]
>>>    File
>>> "/usr/lib64/python2.6/site-packages/duplicity/backends/sshbackend.py",
>>> line 197, in run_sftp_command
>>>      raise BackendException("Error running '%s'" % commandline)
>>>
>>> I've seen similar errors reported and there's
>>> https://bugs.launchpad.net/duplicity/+bug/411145, though there's no
>>> sign of a "Couldn't get handle" error in my case.
>>>
>>> The problem occurs both with the current Fedora package 0.6.08b and
>>> with a local build of the latest version 0.6.09.
>>>
>>> Here's the redacted script:
>>>
>>>
>>> #!/bin/sh
>>> # Script to backup $HOME
>>>
>>> export PASSPHRASE="<passphrase>"
>>>
>>> duplicity -v 9 --ssh-options="-oIdentityFile=/home/linda/.ssh/id_dsa"
>>> /home/linda scp://linda@<remote server>//home2/linda
>>>
>>>
>>> Adam
>>>
>>> _______________________________________________
>>> Duplicity-talk mailing list
>>> address@hidden
>>> http://lists.nongnu.org/mailman/listinfo/duplicity-talk
>>
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