A Python library for the Docker Engine API
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Sebastiaan van Stijn 7168e09b16
test: fix for cgroupv2 (#2940)
This test was verifying that the container has the right options set (through
`docker inspect`), but also checks if the cgroup-rules are set within the
container by reading `/sys/fs/cgroup/devices/devices.list`

Unlike cgroups v1, on cgroups v2, there is no file interface, and rules are
handled through ebpf, which means that the test will fail because this file
is not present.

From the Linux documentation for cgroups v2:
https://github.com/torvalds/linux/blob/v5.16/Documentation/admin-guide/cgroup-v2.rst#device-controller

> (...)
> Device controller manages access to device files. It includes both creation of
> new device files (using mknod), and access to the existing device files.
>
> Cgroup v2 device controller has no interface files and is implemented on top
> of cgroup BPF. To control access to device files, a user may create bpf programs
> of type BPF_PROG_TYPE_CGROUP_DEVICE and attach them to cgroups with
> BPF_CGROUP_DEVICE flag. (...)

Given that setting the right cgroups is not really a responsibility of this SDK,
it should be sufficient to verify that the right options were set in the container
configuration, so this patch is removing the part that checks the cgroup, to
allow this test to be run on a host with cgroups v2 enabled.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2022-07-26 12:06:51 -04:00
.github ci: remove Python 3.6 and add 3.11 pre-releases (#3005) 2022-07-26 08:51:52 -04:00
docker utils: fix IPv6 address w/ port parsing (#3006) 2022-07-26 11:35:44 -04:00
docs Post-release changelog update 2021-10-08 00:58:26 +02:00
scripts use python3.6+ constructs 2021-07-05 18:30:07 -04:00
tests test: fix for cgroupv2 (#2940) 2022-07-26 12:06:51 -04:00
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README.md

Docker SDK for Python

Build Status

A Python library for the Docker Engine API. It lets you do anything the docker command does, but from within Python apps run containers, manage containers, manage Swarms, etc.

Installation

The latest stable version is available on PyPI. Either add docker to your requirements.txt file or install with pip:

pip install docker

If you are intending to connect to a docker host via TLS, add docker[tls] to your requirements instead, or install with pip:

pip install docker[tls]

Usage

Connect to Docker using the default socket or the configuration in your environment:

import docker
client = docker.from_env()

You can run containers:

>>> client.containers.run("ubuntu:latest", "echo hello world")
'hello world\n'

You can run containers in the background:

>>> client.containers.run("bfirsh/reticulate-splines", detach=True)
<Container '45e6d2de7c54'>

You can manage containers:

>>> client.containers.list()
[<Container '45e6d2de7c54'>, <Container 'db18e4f20eaa'>, ...]

>>> container = client.containers.get('45e6d2de7c54')

>>> container.attrs['Config']['Image']
"bfirsh/reticulate-splines"

>>> container.logs()
"Reticulating spline 1...\n"

>>> container.stop()

You can stream logs:

>>> for line in container.logs(stream=True):
...   print(line.strip())
Reticulating spline 2...
Reticulating spline 3...
...

You can manage images:

>>> client.images.pull('nginx')
<Image 'nginx'>

>>> client.images.list()
[<Image 'ubuntu'>, <Image 'nginx'>, ...]

Read the full documentation to see everything you can do.