.. _docker:

Docker
======

If you use ``Docker``, Glances can help you to monitor your containers.
Glances uses the Docker API through the `docker-py`_ library.

You can install this dependency using:

.. code-block:: console

    pip install glances[docker]

.. image:: ../_static/docker.png

It is possible to define limits and actions from the configuration file
under the ``[docker]`` section:

.. code-block:: ini

    [docker]
    disable=False
    # Only show specific containers (comma separated list of container name or regular expression)
    show=thiscontainer,andthisone,andthoseones.*
    # Hide some containers (comma separated list of container name or regular expression)
    hide=donotshowthisone,andthose.*
    # Show only specific containers (comma separated list of container name or regular expression)
    #show=showthisone,andthose.*
    # Define the maximum docker size name (default is 20 chars)
    max_name_size=20
    # Global containers' thresholds for CPU and MEM (in %)
    cpu_careful=50
    cpu_warning=70
    cpu_critical=90
    mem_careful=20
    mem_warning=50
    mem_critical=70
    # Per container thresholds
    containername_cpu_careful=10
    containername_cpu_warning=20
    containername_cpu_critical=30
    containername_cpu_critical_action=echo {{Image}} {{Id}} {{cpu}} > /tmp/container_{{name}}.alert
    # By default, Glances only display running containers
    # Set the following key to True to display all containers
    all=False

You can use all the variables ({{foo}}) available in the Docker plugin.

Filtering (for hide or show) is based on regular expression. Please be sure that your regular
expression works as expected. You can use an online tool like `regex101`_ in
order to test your regular expression.

.. _regex101: https://regex101.com/
.. _docker-py: https://github.com/docker/docker-py