community.docker.docker_host_info – Retrieves facts about docker host and lists of objects of the services.¶
Note
This plugin is part of the community.docker collection (version 1.5.0).
To install it use: ansible-galaxy collection install community.docker
.
To use it in a playbook, specify: community.docker.docker_host_info
.
Synopsis¶
Retrieves facts about a docker host.
Essentially returns the output of
docker system info
.The module also allows to list object names for containers, images, networks and volumes. It also allows to query information on disk usage.
The output differs depending on API version of the docker daemon.
If the docker daemon cannot be contacted or does not meet the API version requirements, the module will fail.
Requirements¶
The below requirements are needed on the host that executes this module.
Docker API >= 1.21
Docker SDK for Python: Please note that the docker-py Python module has been superseded by docker (see here for details). For Python 2.6,
docker-py
must be used. Otherwise, it is recommended to install thedocker
Python module. Note that both modules should not be installed at the same time. Also note that when both modules are installed and one of them is uninstalled, the other might no longer function and a reinstall of it is required.Docker SDK for Python >= 1.10.0 (use docker-py for Python 2.6)
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 |
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
|
|
Whether to list containers.
|
containers_filters
dictionary
|
A dictionary of filter values used for selecting containers to list.
For example,
until: 24h .See the docker documentation for more information on possible filters.
|
|
debug
boolean
|
|
Debug mode
|
disk_usage
boolean
|
|
Summary information on used disk space by all Docker layers.
The output is a sum of images, volumes, containers and build cache.
|
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
|
|
Whether to list images.
|
images_filters
dictionary
|
A dictionary of filter values used for selecting images to list.
For example,
dangling: true .See the docker documentation for more information on possible filters.
|
|
networks
boolean
|
|
Whether to list networks.
|
networks_filters
dictionary
|
A dictionary of filter values used for selecting networks to list.
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
|
|
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. |
use_ssh_client
boolean
added in 1.5.0 of community.docker
|
|
For SSH transports, use the
ssh CLI tool instead of paramiko.Requires Docker SDK for Python 4.4.0 or newer.
|
validate_certs
boolean
|
|
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 |
verbose_output
boolean
|
|
When set to
yes and networks, volumes, images, containers or disk_usage is set to yes then output will contain verbose information about objects matching the full output of API method. For details see the documentation of your version of Docker API at L(https://docs.docker.com/engine/api/).The verbose output in this module contains only subset of information returned by _info module for each type of the objects.
|
volumes
boolean
|
|
Whether to list volumes.
|
volumes_filters
dictionary
|
A dictionary of filter values used for selecting volumes to list.
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
andDOCKER_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://docs.docker.com/machine/reference/env/ 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 ansible.builtin.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
$HOME/.docker/config.json
if theDOCKER_CONFIG
environment variable is not specified, and use$DOCKER_CONFIG/config.json
otherwise.This module uses the Docker SDK for Python to communicate with the Docker daemon.
Examples¶
- name: Get info on docker host
community.docker.docker_host_info:
register: result
- name: Get info on docker host and list images
community.docker.docker_host_info:
images: yes
register: result
- name: Get info on docker host and list images matching the filter
community.docker.docker_host_info:
images: yes
images_filters:
label: "mylabel"
register: result
- name: Get info on docker host and verbose list images
community.docker.docker_host_info:
images: yes
verbose_output: yes
register: result
- name: Get info on docker host and used disk space
community.docker.docker_host_info:
disk_usage: yes
register: result
- ansible.builtin.debug:
var: result.host_info
Return Values¶
Common return values are documented here, the following are the fields unique to this module:
Authors¶
Piotr Wojciechowski (@WojciechowskiPiotr)