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.. _amps:
Applications Monitoring Process
===============================
Thanks to Glances and its AMP module, you can add specific monitoring to
running processes. AMPs are defined in the Glances [configuration file](http://glances.readthedocs.io/en/stable/config.html).
You can disable AMP using the ``--disable-amps`` option or pressing the
``A`` key.
Simple AMP
----------
For example, a simple AMP that monitor the CPU/MEM of all Python
processes can be defined as follows:
.. code-block:: ini
[amp_python]
enable=true
regex=.*python.*
refresh=3
Every 3 seconds (``refresh``) and if the ``enable`` key is true, Glances
will filter the running processes list thanks to the ``.*python.*``
regular expression (``regex``).
The default behavior for an AMP is to display the number of matching
processes, CPU and MEM:
.. image:: ../_static/amp-python.png
You can also define the minimum (``countmin``) and/or maximum
(``countmax``) process number. For example:
.. code-block:: ini
[amp_python]
enable=true
regex=.*python.*
refresh=3
countmin=1
countmax=2
With this configuration, if the number of running Python scripts is
higher than 2, then the AMP is displayed with a purple color (red if
less than countmin):
.. image:: ../_static/amp-python-warning.png
User defined AMP
----------------
If you need to execute a specific command line, you can use the
``command`` option. For example, if you want to display the Dropbox
process status, you can define the following section in the Glances
configuration file:
.. code-block:: ini
[amp_dropbox]
# Use the default AMP (no dedicated AMP Python script)
enable=true
regex=.*dropbox.*
refresh=3
one_line=false
command=dropbox status
countmin=1
The ``dropbox status`` command line will be executed and displayed in
the Glances UI:
.. image:: ../_static/amp-dropbox.png
You can force Glances to display the result in one line setting
``one_line`` to true.
Embedded AMP
------------
Glances provides some specific AMP scripts (replacing the ``command``
line). You can write your own AMP script to fill your needs. AMP scripts
are located in the ``amps`` folder and should be named ``glances_*.py``.
An AMP script define an Amp class (``GlancesAmp``) with a mandatory
update method. The update method call the ``set_result`` method to set
the AMP return string. The return string is a string with one or more
line (\n between lines). To enable it, the configuration file section
should be named ``[amp_*]``.
For example, if you want to enable the Nginx AMP, the following
definition should do the job (Nginx AMP is provided by the Glances team
as an example):
.. code-block:: ini
[amp_nginx]
enable=true
regex=\/usr\/sbin\/nginx
refresh=60
one_line=false
status_url=http://localhost/nginx_status
Here's the result:
.. image:: ../_static/amps.png
In client/server mode, the AMP list is defined on the server side.
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