docker_prune – Allows to prune various docker objects

New in version 2.8.

Synopsis

  • Allows to run docker container prune, docker image prune, docker network prune and docker volume prune via the Docker API.

Requirements

The below requirements are needed on the host that executes this module.

  • Docker API >= 1.25
  • Docker SDK for Python: Please note that the docker-py Python module has been superseded by docker (see here for details). This module does not work with docker-py.
  • Docker SDK for Python >= 2.1.0
  • Python >= 2.7

Parameters

Parameter Choices/Defaults Comments
api_version
string
Default:
"auto"
The version of the Docker API running on the Docker Host.
Defaults to the latest version of the API supported by Docker SDK for Python and the docker daemon.
If the value is not specified in the task, the value of environment variable DOCKER_API_VERSION will be used instead. If the environment variable is not set, the default value will be used.

aliases: docker_api_version
builder_cache
boolean
    Choices:
  • no ←
  • yes
Whether to prune the builder cache.
Requires version 3.3.0 of the Docker SDK for Python or newer.
ca_cert
path
Use a CA certificate when performing server verification by providing the path to a CA certificate file.
If the value is not specified in the task and the environment variable DOCKER_CERT_PATH is set, the file ca.pem from the directory specified in the environment variable DOCKER_CERT_PATH will be used.

aliases: tls_ca_cert, cacert_path
client_cert
path
Path to the client's TLS certificate file.
If the value is not specified in the task and the environment variable DOCKER_CERT_PATH is set, the file cert.pem from the directory specified in the environment variable DOCKER_CERT_PATH will be used.

aliases: tls_client_cert, cert_path
client_key
path
Path to the client's TLS key file.
If the value is not specified in the task and the environment variable DOCKER_CERT_PATH is set, the file key.pem from the directory specified in the environment variable DOCKER_CERT_PATH will be used.

aliases: tls_client_key, key_path
containers
boolean
    Choices:
  • no ←
  • yes
Whether to prune containers.
containers_filters
dictionary
A dictionary of filter values used for selecting containers to delete.
For example, until: 24h.
See the docker documentation for more information on possible filters.
debug
boolean
    Choices:
  • no ←
  • yes
Debug mode
docker_host
string
Default:
"unix://var/run/docker.sock"
The URL or Unix socket path used to connect to the Docker API. To connect to a remote host, provide the TCP connection string. For example, tcp://192.0.2.23:2376. If TLS is used to encrypt the connection, the module will automatically replace tcp in the connection URL with https.
If the value is not specified in the task, the value of environment variable DOCKER_HOST will be used instead. If the environment variable is not set, the default value will be used.

aliases: docker_url
images
boolean
    Choices:
  • no ←
  • yes
Whether to prune images.
images_filters
dictionary
A dictionary of filter values used for selecting images to delete.
For example, dangling: true.
See the docker documentation for more information on possible filters.
networks
boolean
    Choices:
  • no ←
  • yes
Whether to prune networks.
networks_filters
dictionary
A dictionary of filter values used for selecting networks to delete.
See the docker documentation for more information on possible filters.
ssl_version
string
Provide a valid SSL version number. Default value determined by ssl.py module.
If the value is not specified in the task, the value of environment variable DOCKER_SSL_VERSION will be used instead.
timeout
integer
Default:
60
The maximum amount of time in seconds to wait on a response from the API.
If the value is not specified in the task, the value of environment variable DOCKER_TIMEOUT will be used instead. If the environment variable is not set, the default value will be used.
tls
boolean
    Choices:
  • no ←
  • yes
Secure the connection to the API by using TLS without verifying the authenticity of the Docker host server. Note that if validate_certs is set to yes as well, it will take precedence.
If the value is not specified in the task, the value of environment variable DOCKER_TLS will be used instead. If the environment variable is not set, the default value will be used.
tls_hostname
string
Default:
"localhost"
When verifying the authenticity of the Docker Host server, provide the expected name of the server.
If the value is not specified in the task, the value of environment variable DOCKER_TLS_HOSTNAME will be used instead. If the environment variable is not set, the default value will be used.
validate_certs
boolean
    Choices:
  • no ←
  • yes
Secure the connection to the API by using TLS and verifying the authenticity of the Docker host server.
If the value is not specified in the task, the value of environment variable DOCKER_TLS_VERIFY will be used instead. If the environment variable is not set, the default value will be used.

aliases: tls_verify
volumes
boolean
    Choices:
  • no ←
  • yes
Whether to prune volumes.
volumes_filters
dictionary
A dictionary of filter values used for selecting volumes to delete.
See the docker documentation for more information on possible filters.

Notes

Note

  • Connect to the Docker daemon by providing parameters with each task or by defining environment variables. You can define DOCKER_HOST, DOCKER_TLS_HOSTNAME, DOCKER_API_VERSION, DOCKER_CERT_PATH, DOCKER_SSL_VERSION, DOCKER_TLS, DOCKER_TLS_VERIFY and DOCKER_TIMEOUT. If you are using docker machine, run the script shipped with the product that sets up the environment. It will set these variables for you. See https://docker-py.readthedocs.io/en/stable/machine/ for more details.
  • When connecting to Docker daemon with TLS, you might need to install additional Python packages. For the Docker SDK for Python, version 2.4 or newer, this can be done by installing docker[tls] with pip.
  • Note that the Docker SDK for Python only allows to specify the path to the Docker configuration for very few functions. In general, it will use $HOME/.docker/config.json if the DOCKER_CONFIG environment variable is not specified, and use $DOCKER_CONFIG/config.json otherwise.

Examples

- name: Prune containers older than 24h
  docker_prune:
    containers: yes
    containers_filters:
      # only consider containers created more than 24 hours ago
      until: 24h

- name: Prune everything
  docker_prune:
    containers: yes
    images: yes
    networks: yes
    volumes: yes
    builder_cache: yes

- name: Prune everything (including non-dangling images)
  docker_prune:
    containers: yes
    images: yes
    images_filters:
      dangling: false
    networks: yes
    volumes: yes
    builder_cache: yes

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key Returned Description
builder_cache_space_reclaimed
integer
builder_cache is true
Amount of reclaimed disk space from builder cache pruning in bytes.

Sample:
0
containers
list
containers is true
List of IDs of deleted containers.

Sample:
[]
containers_space_reclaimed
integer
containers is true
Amount of reclaimed disk space from container pruning in bytes.

Sample:
0
images
list
images is true
List of IDs of deleted images.

Sample:
[]
images_space_reclaimed
integer
images is true
Amount of reclaimed disk space from image pruning in bytes.

Sample:
0
networks
list
networks is true
List of IDs of deleted networks.

Sample:
[]
volumes
list
volumes is true
List of IDs of deleted volumes.

Sample:
[]
volumes_space_reclaimed
integer
volumes is true
Amount of reclaimed disk space from volumes pruning in bytes.

Sample:
0


Status

Authors

  • Felix Fontein (@felixfontein)

Hint

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