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223 lines
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223 lines
7.0 KiB
ReStructuredText
.. _docker:
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Docker
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======
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Glances can be installed through Docker, allowing you to run it without installing all the python dependencies directly on your system. Once you have [docker installed](https://docs.docker.com/install/), you can
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Get the Glances container:
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.. code-block:: console
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docker pull nicolargo/glances:<version>
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Available tags (all images are based on both Alpine and Ubuntu Operating System):
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- *latest-full* for a full Alpine Glances image (latest release) with all dependencies
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- *latest* for a basic Alpine Glances (latest release) version with minimal dependencies (Bottle and Docker)
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- *dev* for a basic Alpine Glances image (based on development branch) with all dependencies (Warning: may be instable)
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- *ubuntu-latest-full* for a full Ubuntu Glances image (latest release) with all dependencies
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- *ubuntu-latest* for a basic Ubuntu Glances (latest release) version with minimal dependencies (Bottle and Docker)
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- *ubuntu-dev* for a basic Ubuntu Glances image (based on development branch) with all dependencies (Warning: may be instable)
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You can also specify a version (example: 3.4.0). All available versions can be found on `DockerHub`_.
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An Example to pull the `latest` tag:
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.. code-block:: console
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docker pull nicolargo/glances:latest
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Run the container in *console mode*:
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.. code-block:: console
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docker run --rm -v /var/run/docker.sock:/var/run/docker.sock:ro --pid host --network host -it docker.io/nicolargo/glances
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Additionally, if you want to use your own glances.conf file, you can create your own Dockerfile:
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.. code-block:: console
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FROM nicolargo/glances
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COPY glances.conf /glances/conf/glances.conf
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CMD python -m glances -C /glances/conf/glances.conf $GLANCES_OPT
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Alternatively, you can specify something along the same lines with docker run options:
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.. code-block:: console
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docker run -v `pwd`/glances.conf:/glances/conf/glances.conf -v /var/run/docker.sock:/var/run/docker.sock:ro --pid host -it docker.io/nicolargo/glances
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Where \`pwd\`/glances.conf is a local directory containing your glances.conf file.
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Run the container in *Web server mode* (notice the `GLANCES_OPT` environment variable setting parameters for the glances startup command):
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.. code-block:: console
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docker run -d --restart="always" -p 61208-61209:61208-61209 -e GLANCES_OPT="-w" -v /var/run/docker.sock:/var/run/docker.sock:ro --pid host docker.io/nicolargo/glances
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Note: if you want to see the network interface stats within the container, add --net=host --privileged
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You can also include Glances container in you own `docker-compose.yml`. Here's a realistic example including a "traefik" reverse proxy serving an "whoami" app container plus a Glances container, providing a simple and efficient monitoring webui.
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.. code-block:: console
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version: '3'
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services:
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reverse-proxy:
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image: traefik:alpine
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command: --api --docker
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ports:
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- "80:80"
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- "8080:8080"
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock
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whoami:
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image: emilevauge/whoami
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labels:
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- "traefik.frontend.rule=Host:whoami.docker.localhost"
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monitoring:
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image: nicolargo/glances:latest-alpine
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restart: always
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pid: host
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock
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environment:
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- "GLANCES_OPT=-w"
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labels:
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- "traefik.port=61208"
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- "traefik.frontend.rule=Host:glances.docker.localhost"
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How to protect your Dockerized server (or Web server) with a login/password ?
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-----------------------------------------------------------------------------
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Below are two methods for setting up a login/password to protect Glances running inside a Docker container.
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Option 1
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^^^^^^^^
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You can enter the running container by entering this command (replacing ``glances_docker`` with the name of your container):
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.. code-block:: console
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docker exec -it glances_docker sh
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and generate the password file (the default login is ``glances``, add the ``--username`` flag if you would like to change it):
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.. code-block:: console
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glances -s --password
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which will prompt you to answer the following questions:
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.. code-block:: console
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Define the Glances server password (glances username):
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Password (confirm):
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Do you want to save the password? [Yes/No]: Yes
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after which you will need to kill the process by entering ``CTRL+C`` (potentially twice), before leaving the container:
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.. code-block:: console
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exit
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You will then need to copy the password file to your host machine:
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.. code-block:: console
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docker cp glances_docker:/root/.config/glances/glances.pwd ./secrets/glances_password
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and make it visible to your container by adding it to ``docker-compose.yml`` as a ``secret``:
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.. code-block:: yaml
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version: '3'
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services:
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glances:
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image: nicolargo/glances:latest
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restart: always
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environment:
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- GLANCES_OPT="-w --password"
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock:ro
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pid: host
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secrets:
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- source: glances_password
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target: /root/.config/glances/glances.pwd
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secrets:
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glances_password:
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file: ./secrets/glances_password
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Option 2
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^^^^^^^^
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You can add a ``[passwords]`` block to the Glances configuration file as mentioned elsewhere in the documentation:
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.. code-block:: ini
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[passwords]
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# Define the passwords list
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# Syntax: host=password
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# Where: host is the hostname
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# password is the clear password
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# Additionally (and optionally) a default password could be defined
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localhost=mylocalhostpassword
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default=mydefaultpassword
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Using GPU Plugin with Docker (Only Nvidia GPUs)
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-----------------------------------------------
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Complete the steps mentioned in the `docker docs <https://docs.docker.com/config/containers/resource_constraints/#gpu>`_
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to make the GPU accessible by the docker engine.
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With `docker run`
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^^^^^^^^^^^^^^^^^
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Include the `--gpus` flag with the `docker run` command.
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**Note:** Make sure the `--gpus` is present before the image name in the command, otherwise it won't work.
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.. code-block:: ini
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docker run --rm -v /var/run/docker.sock:/var/run/docker.sock:ro --gpus --pid host --network host -it docker.io/nicolargo/glances:latest-full
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..
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With `docker-compose`
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^^^^^^^^^^^^^^^^^^^^^
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Include the `deploy` section in compose file as specified below in the example service definition.
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.. code-block:: ini
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version: '3'
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services:
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monitoring:
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image: nicolargo/glances:latest-full
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pid: host
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network_mode: host
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock
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environment:
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- "GLANCES_OPT=-w"
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# For nvidia GPUs
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deploy:
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resources:
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reservations:
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devices:
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- driver: nvidia
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count: 1
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capabilities: [gpu]
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..
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Reference: https://docs.docker.com/compose/gpu-support/
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.. _DockerHub: https://hub.docker.com/r/nicolargo/glances/tags
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