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145 lines
3.7 KiB
ReStructuredText
145 lines
3.7 KiB
ReStructuredText
.. _amps:
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Applications Monitoring Process
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===============================
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Thanks to Glances and its AMP module, you can add specific monitoring to
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running processes. AMPs are defined in the Glances :ref:`configuration file<config>`.
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You can disable AMP using the ``--disable-plugin amps`` option or pressing the
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``A`` key.
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Simple AMP
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----------
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For example, a simple AMP that monitor the CPU/MEM of all Python
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processes can be defined as follows:
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.. code-block:: ini
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[amp_python]
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enable=true
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regex=.*python.*
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refresh=3
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Every 3 seconds (``refresh``) and if the ``enable`` key is true, Glances
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will filter the running processes list thanks to the ``.*python.*``
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regular expression (``regex``).
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The default behavior for an AMP is to display the number of matching
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processes, CPU and MEM:
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.. image:: ../_static/amp-python.png
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You can also define the minimum (``countmin``) and/or maximum
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(``countmax``) process number. For example:
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.. code-block:: ini
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[amp_python]
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enable=true
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regex=.*python.*
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refresh=3
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countmin=1
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countmax=2
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With this configuration, if the number of running Python scripts is
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higher than 2, then the AMP is displayed with a purple color (red if
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less than countmin):
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.. image:: ../_static/amp-python-warning.png
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If the regex option is not defined, the AMP will be executed every refresh
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time and the process count will not be displayed (countmin and countmax will
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be ignored).
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For example:
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.. code-block:: ini
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[amp_conntrack]
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enable=false
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refresh=30
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one_line=false
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command=sysctl net.netfilter.nf_conntrack_count && sysctl net.netfilter.nf_conntrack_max
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Note: for multiple command, please use the '&&'' separator.
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For security reason, pipe is not directly allowed in a AMP command but you create a shell
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script with your command:
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.. code-block:: ini
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$ cat /usr/local/bin/mycommand.sh
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#!/bin/sh
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ps -aux | wc -l
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and use it in the amps:
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.. code-block:: ini
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[amp_amptest]
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enable=true
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regex=.*
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refresh=15
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one_line=false
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command=/usr/local/bin/mycommand.sh
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User defined AMP
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----------------
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If you need to execute a specific command line, you can use the
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``command`` option. For example, if you want to display the Dropbox
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process status, you can define the following section in the Glances
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configuration file:
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.. code-block:: ini
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[amp_dropbox]
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# Use the default AMP (no dedicated AMP Python script)
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enable=true
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regex=.*dropbox.*
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refresh=3
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one_line=false
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command=dropbox status
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countmin=1
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The ``dropbox status`` command line will be executed and displayed in
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the Glances UI:
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.. image:: ../_static/amp-dropbox.png
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You can force Glances to display the result in one line setting
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``one_line`` to true.
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Embedded AMP
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------------
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Glances provides some specific AMP scripts (replacing the ``command``
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line). You can write your own AMP script to fill your needs. AMP scripts
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are located in the ``amps`` folder and should be named ``glances_*.py``.
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An AMP script define an Amp class (``GlancesAmp``) with a mandatory
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update method. The update method call the ``set_result`` method to set
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the AMP return string. The return string is a string with one or more
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line (\n between lines). To enable it, the configuration file section
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should be named ``[amp_*]``.
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For example, if you want to enable the Nginx AMP, the following
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definition should do the job (Nginx AMP is provided by the Glances team
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as an example):
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.. code-block:: ini
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[amp_nginx]
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enable=true
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regex=\/usr\/sbin\/nginx
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refresh=60
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one_line=false
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status_url=http://localhost/nginx_status
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Here's the result:
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.. image:: ../_static/amps.png
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In client/server mode, the AMP list is defined on the server side.
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