Re: [Duplicity-talk] BackendException: ssh connection to ... failed: EOF when reading a line

[edgar . soldin]

On 11.02.2013 14:44, Sven wrote:
> edgar.soldin writes:
>> did you update your duplicity lately?
> 
> Yes, and I've just reverted not just duplicity but also paramiko - and 
> got one step closer to the source of the problem:
> 
> I can't easily revert back to duplicity-0.6.18 since this version has been 
> pulled from Gentoo's mirrors already. However, I can revert to 

check http://duply.net/?title=Duply-documentation under TIP on how to install 
several duplicity versions in parallel

> paramiko-1.7.7.1 and this problem DOES NOT exist with that version of 
> paramiko.

hmmm.. maybe a paramiko API change. i'll check.

> Nevertheless, I've done the tests you've asked for:
> 
>> check if your script really is run as root and the file known_hosts is 
>> there and contains your entry. maybe a weird changeroot problem.
> 
> Here's the script run as root cronjob:
> 
> #!/bin/bash
> export URL='sftp://#####:address@hidden/config'
> export PASSPHRASE='#####'
> duplicity                                                                \
>   --full-if-older-than 1W                                                \
>   --encrypt-sign-key ########                                            \
>   --include /etc                                                         \
>   --exclude '**'                                                         \
>   /                                                                      \
>   ${URL}                                                                 \
>   --verbosity 9
> 
> The job runs as root, here's what "ps aux" shows:
> 
> root      4664  0.0  0.0  11744  1500 ?        Ss   13:47   0:00 
>   /bin/bash /opt/bin/duplicity-hetzner-config-test
> root      4666  0.0  0.0 192096 15528 ?        Sl   13:47   0:00 
>   /usr/bin/python2.7 /usr/bin/duplicity #####
> 
> And the output:
> 
> Using archive dir: //.cache/duplicity/#####
> Using backup name: #####
> Import of duplicity.backends.rsyncbackend Succeeded
> Import of duplicity.backends.imapbackend Succeeded
> Import of duplicity.backends.ftpbackend Succeeded
> Import of duplicity.backends.botobackend Succeeded
> Import of duplicity.backends.ftpsbackend Succeeded
> Import of duplicity.backends.tahoebackend Succeeded
> Import of duplicity.backends.hsibackend Succeeded
> Import of duplicity.backends.cloudfilesbackend Succeeded
> Import of duplicity.backends.localbackend Succeeded
> Import of duplicity.backends.u1backend Failed: No module named httplib2
> Import of duplicity.backends.sshbackend Succeeded
> Import of duplicity.backends.gdocsbackend Succeeded
> Import of duplicity.backends.webdavbackend Succeeded
> The authenticity of host '#####' can't be established.
> SSH-RSA key fingerprint is ##:##:##:##:##:##:##:##:##:##:##:##:##:##:##:##.
> Are you sure you want to continue connecting (yes/no)? Using temporary 
>   directory
>   /tmp/duplicity-NIITrb-tempdir
> Backend error detail: Traceback (most recent call last):
>  File "/usr/bin/duplicity-2.7", line 1403, in <module>
>    with_tempdir(main)
>  File "/usr/bin/duplicity-2.7", line 1396, in with_tempdir
>    fn()
>  File "/usr/bin/duplicity-2.7", line 1247, in main
>    action = commandline.ProcessCommandLine(sys.argv[1:])
>  File "/usr/lib64/python2.7/site-packages/duplicity/commandline.py", 
>    line 1002, in ProcessCommandLine
>    backup, local_pathname = set_backend(args[0], args[1])
>  File "/usr/lib64/python2.7/site-packages/duplicity/commandline.py",
>    line 895, in set_backend
>    globals.backend = backend.get_backend(bend)
>  File "/usr/lib64/python2.7/site-packages/duplicity/backend.py",
>    line 161, in get_backend
>    return _backends[pu.scheme](pu)
>  File "/usr/lib64/python2.7/site-packages/duplicity/backends/_ssh_paramiko
>    .py", line 182, in __init__ self.config['port'],e))
> BackendException: ssh connection to #####.de:22 failed: EOF when reading 
> a line
> 
> BackendException: ssh connection to #####.de:22 failed: EOF when reading 
> a line
> Job /opt/bin/duplicity-hetzner-config-test terminated (exit status: 23) 
> (mailing output)

ok, so it fails also when run manually as root. not only when run through cron, 
right?

>> additionally switch back to the old ssh pexpect backend, via 
>> --ssh-backend switch and see if that behaves differently.
> 
> The SFTP connection does work with pexpect backend. (However, I get an
> unrelated "gpg: decryption failed: No secret key" error further down.)
> 

would you mind sending a full debug output for that (obfuscate)? or don't you 
simply don't have sftp binary available?

..ede/duply.net