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add README, LICENSE and release script
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25 changes: 25 additions & 0 deletions LICENSE
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Copyright (c) 2007-2008 Benedikt Böhm <[email protected]>
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
120 changes: 120 additions & 0 deletions README
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=======
inosync
=======

:Author: `Benedikt Böhm <[email protected]>`_
:Version: 0.2
:Web: http://bb.xnull.de/projects/inosync/
:Source: http://git.xnull.de/gitweb/?p=inosync.git
:Download: http://bb.xnull.de/projects/inosync/dist/

Rationale
=========

System administrators have relied on cron+rsync for years to constantly
synchronize files and directories to remote machines. However, this technique
has a huge disadvantage for content distribution with near real-time
requirements, e.g. podcasts and blogging.

It is not feasible to let authors wait for their content to get synchronized
every x hours with regard to the enormous pace of articles and
podcasts nowadays.

The inosync daemon leverages the inotify service available in recent linux
kernels to monitor and synchronize changes within directories to remote nodes.


Usage
=====

::

inosync [OPTIONS]

-c FILE load configuration from FILE
-d daemonize (fork to background)
-p do not actually call rsync
-v print debugging information
--version show program's version number and exit
-h, --help show this help message and exit


Configuration
=============

Configuration files are simple python scripts, merely declaring necessary
variables. Below is an example configuration to synchronize ``/var/www``
except ``/var/www/localhost`` to 3 remote locations:
::

# directory that should be watched for changes
wpath = "/var/www/"

# exclude list for rsync
rexcludes = [
"/localhost",
]

# common remote path
rpath = "/var/www/"

# remote locations in rsync syntax
rnodes = [
"a.mirror.com:" + rpath,
"b.mirror.com:" + rpath,
"c.mirror.com:" + rpath,
]

# limit remote sync speed (in KB/s, 0 = no limit)
#rspeed = 0

# event mask (only sync on these events)
#emask = [
# "IN_CLOSE_WRITE",
# "IN_CREATE",
# "IN_DELETE",
# "IN_MOVED_FROM",
# "IN_MOVED_TO",
#]

# event delay in seconds (this prevents huge
# amounts of syncs, but dicreases the
# realtime side of things)
#edelay = 10

# rsync binary path
#rsync = "/usr/bin/rsync"


Bugs
====

There are no known bugs currently, however, due to the design of inosync, there
are several shortcomings:

- inosync cannot parse rsync excludes and therefore calls rsync on changes in
excluded directories as well. (`of course rsync still excludes these
directories`)
- It is easily possible to flood the daemon with huge amounts of change events,
potentially resulting in enormous bandwidth and connection usage.

Requirements
============

To use this script you need the following software installed on your system:

- linux-2.6.13 or later
- Python-2.4 or later
- pyinotify-0.7.0 or later


Related Software
================

inosync is similar to `lsyncd <http://www.pri.univie.ac.at/index.php?c=show&CEWebS_what=Lsyncd>`_,
but uses a lot less (nasty) magic to parse rsync excludes and shared www
directories. Additionally inosync has no limitation on filename size and number
of active watchpoints.

A comparision to other approaches like DRBD, incron and FUSE can be found at
lsyncds project page, mentioned above.
37 changes: 1 addition & 36 deletions inosync.py
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#!/usr/bin/python
# vim: set fileencoding=utf-8 ts=2 sw=2 expandtab :
#
# Copyright (c) 2007-2008 Benedikt Böhm <[email protected]>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# ChangeLog:
#
# *inosync-0.2 (24 Jan 2008):
# use configuration files
# add event delay option
#
# *inosync-0.1 (09 Jan 2008):
# initial version

import os,sys
from optparse import OptionParser,make_option
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from pyinotify import *

__author__ = "Benedikt Böhm"
__copyright__ = "Copyright (c) 2007-2008 Benedikt Böhm <[email protected]>"
__copyright__ = "Copyright (c) 2007-2008 Benedikt Böhm <[email protected]>"
__version__ = 0,2

OPTION_LIST = [
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17 changes: 17 additions & 0 deletions mkrelease.sh
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#!/bin/bash

source /etc/init.d/functions.sh

PROJECT=inosync
VERSION=$(sed 's/^:Version: \(.*\)/\1/;t;d' README)

mkdir -p ~/public_html/projects/${PROJECT}/dist

ebegin "Creating release tarball"
git-archive --format=tar --prefix=${PROJECT}-${VERSION}/ HEAD | \
bzip2 > ~/public_html/projects/${PROJECT}/dist/${PROJECT}-${VERSION}.tar.bz2
eend $?

ebegin "Generating project page"
rst2html.py < README > ~/public_html/projects/${PROJECT}/index.html
eend $?

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