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fs-watcher-1.0.9
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مشاهده بیشترتوضیحات
Daemon that watches specified files/folders for changes and fires commands in response to those changes
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | fs-watcher-1.0.9 |
| نام | fs-watcher |
| نسخه کتابخانه | 1.0.9 |
| نگهدارنده | ['Oleh Palii'] |
| ایمیل نگهدارنده | ['o.palij@gmail.com'] |
| نویسنده | - |
| ایمیل نویسنده | - |
| آدرس صفحه اصلی | https://github.com/paleg/Watcher |
| آدرس اینترنتی | https://pypi.org/project/fs-watcher/ |
| مجوز | MIT |
filesystem watcher
==================
.. image:: https://img.shields.io/pypi/v/fs-watcher.svg?style=flat-square
:target: https://warehouse.python.org/project/fs-watcher/
:alt: fs-watcher on PyPI
.. image:: https://img.shields.io/pypi/l/fs-watcher.svg?style=flat-square
:target: https://warehouse.python.org/project/fs-watcher/
:alt: fs-watcher on PyPI
.. image:: https://img.shields.io/github/issues/paleg/Watcher.svg?style=flat-square
:target: https://github.com/paleg/Watcher/issues
:alt: GitHub issues for Watcher
|
.. contents:: :local:
Overview
--------
``Watcher`` is a daemon that watches specified files/folders for changes and
fires commands in response to those changes. It is similar to
incron_, however, configuration uses a simpler
to read ini file instead of a plain text file. Unlike incron it can also
recursively monitor directories.
It's written in Python, making it easier to hack.
* `Source on GitHub <https://github.com/paleg/Watcher>`_
* `Packages on PyPI <https://warehouse.python.org/project/fs-watcher/>`_
This fork is a rewritting of the code using python-daemon implementation of PEP3143_ with additional features:
* async commands executing which allows several copies of command can be executed simultaneously for single job
* capturing command output to separate log file
* exclude watching files by regular expression
* perform actions on successful/failure command completion.
Requirements
------------
``Watcher`` supports both Python 2.7 and Python 3.x. It has following dependencies which can be installed with your package manager or `pip`:
* pyinotify_
* python-daemon_
* lockfile_
* chardet_
* future_
To install dependencies on Debian:
.. code-block:: bash
sudo apt-get install python-pyinotify python-daemon python-lockfile python-chardet python-future
.. code-block:: bash
sudo apt-get install python3-pyinotify python3-daemon python3-lockfile python3-chardet python3-future
To install dependencies on Gentoo:
.. code-block:: bash
emerge -av dev-python/pyinotify dev-python/python-daemon dev-python/lockfile dev-python/chardet dev-python/future
pip_ will install dependencies automatically.
Installation
------------
Debian
~~~~~~
Download latest deb package from `GitHub releases page <https://github.com/paleg/Watcher/releases>`_ and install it with ``dpkg``.
.. code-block:: bash
sudo dpkg -i fs-watcher_X.Y.Z-0_all.deb
In addition to ``Watcher`` itself, it will install:
* sample configuration file to ``/etc/watcher.ini``
* systemd service ``fs-watcher`` (in disabled state).
To start using ``Watcher`` you must change ``/etc/watcher.ini`` to suit your needs and enable/start ``fs-watcher`` service.
Pip
~~~
System-wide using pip_:
.. code-block:: bash
sudo pip install fs-watcher
.. code-block:: bash
sudo pip3 install fs-watcher
This command will install:
* Python modules for ``Watcher``
* sample configuration file
* samples of startup scripts
* executable to start ``Watcher``
Use following command to check exact locations:
.. code-block:: bash
pip show -f fs-watcher
There are samples of startup scripts. Use your init system manual to install them properly. Check/fix path to ``Watcher`` executable in samples before using, by default it is assumed to be ``/usr/sbin/watcher``.
For systemd:
.. code-block:: bash
cp share/init/fs-watcher.service /etc/systemd/system/fs-watcher.service
systemctl daemon-reload
systemctl enable fs-watcher
systemctl start fs-watcher
For SysV:
.. code-block:: bash
cp share/init/fs-watcher.sysvinit /etc/init.d/fs-watcher
update-rc.d fs-watcher defaults
/etc/init.d/fs-watcher start
For OpenRC:
.. code-block:: bash
cp share/init/fs-watcher.openrc /etc/init.d/fs-watcher
rc-update add fs-watcher default
/etc/init.d/fs-watcher start
Configuration
-------------
Check provided `watcher.ini`_ file for an example job configuration. The config file should reside in ``/etc/watcher.ini`` or ``~/.watcher.ini``. You can also specify the path to the config file as a command line parameter using the ``--config`` option.
If you edit the ini file you must restart the daemon for it to reload the configuration.
Usage
-----
.. code::
usage: watcher [-h] [--version] [-c CONFIG] [-v] {start,stop,restart,debug}
positional arguments:
{start,stop,restart,debug}
What to do.
optional arguments:
-h, --help show this help message and exit
--version show program's version number and exit
-c CONFIG, --config CONFIG
Path to the config file (default: None)
-v, --verbose verbose output
Debug mode
~~~~~~~~~~
You can start ``Watcher`` with `debug` positional argument to prevent it from forking to the background and log messages to stdout:
.. code-block:: bash
watcher debug
Increasing the amount of inotify watchers
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There is a limit of max number of inotify watchers. When this limit is not enough to monitor all jobs, the limit must be increased for ``Watcher`` to work properly. You can find following error in log when facing this limit:
.. code::
add_watch: cannot watch /...... WD=-1, Errno=No space left on device (ENOSPC)
If you are running Debian, RedHat, or another similar Linux distribution, run the following in a terminal to increase this limit:
.. code-block:: bash
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
Increasing the amount of queued events
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There is a limit of max queued events. When this limit is not enough to monitor all jobs, the limit must be increased for ``Watcher`` to work properly. You can find following warning in log when facing this limit:
.. code::
pyinotify - WARNING - Event queue overflowed.
If you are running Debian, RedHat, or another similar Linux distribution, run the following in a terminal to increase this limit:
.. code-block:: bash
echo fs.inotify.max_queued_events=65536 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
.. _incron: http://incron.aiken.cz/
.. _PEP3143: http://legacy.python.org/dev/peps/pep-3143/
.. _pyinotify: http://github.com/seb-m/pyinotify
.. _python-daemon: https://alioth.debian.org/projects/python-daemon/
.. _lockfile: https://launchpad.net/pylockfile
.. _chardet: https://chardet.github.io/
.. _future: https://pypi.python.org/pypi/future
.. _pip: https://pip.readthedocs.org/
.. _watcher.ini: /debian/watcher.ini
نیازمندی
| مقدار | نام |
|---|---|
| - | future |
| - | pyinotify |
| - | python-daemon |
| - | lockfile |
| - | chardet |
نحوه نصب
نصب پکیج whl fs-watcher-1.0.9:
pip install fs-watcher-1.0.9.whl
نصب پکیج tar.gz fs-watcher-1.0.9:
pip install fs-watcher-1.0.9.tar.gz