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anonymous-one
Asked: 2013-11-06 04:04:25 +0800 CST

Logging sshfs reads + writes - Possible?

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We use sshfs in quite a few situations.

We were wondering if there was a way to log the read / writes made to the sshfs mounts we have so we could optimize things on our local side (eg: tweaking cache, locally caching objects, etc).

Any ideas?

logging

1 Answers

  1. Best Answer

    sshfs is a client application, it uses sftp on the server side. Have a look at the manual pages of sftp-server(8) and sshd_config(5).

    In /etc/ssh/sshd_config, you should put something like (not sure if quotes are needed, try it yourself):

    Subsystem sftp "/usr/lib/ssh/sftp-server -l INFO"

    This will log details using the AUTH facility (/var/log/auth.log on Debian with rsyslogd). To separate SFTP logs from regular authentication messages, you can specify a different facility or redirect the logs. For rsyslogd, you can create /etc/rsyslog.d/sftp.conf containing:

    :programname,isequal,"sftp-server" /var/log/sftp.log

    Note that if your sftp user is chrooted, you need to create a /dev/log socket such that sftp can send messages to the syslog daemon. For rsyslogd, this can be done by creating the dev directory and adding the following line to sftp.conf:

    $AddUnixListenSocket /home/user/dev/log
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