docker_image – Manage docker images

Synopsis

  • Build, load or pull an image, making the image available for creating containers. Also supports tagging an image into a repository and archiving an image to a .tar file.
  • Since Ansible 2.8, it is recommended to explicitly specify the image’s source (source can be build, load, pull or local). This will be required from Ansible 2.12 on.

Requirements

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

  • Docker API >= 1.20
  • Docker SDK for Python: Please note that the docker-py Python module has been superseded by docker (see here for details).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 the docker 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 >= 1.8.0 (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
archive_path
path
Use with state present to archive an image to a .tar file.
build
dictionary
added in 2.8
Specifies options used for building images.
args
dictionary
Provide a dictionary of key:value build arguments that map to Dockerfile ARG directive.
Docker expects the value to be a string. For convenience any non-string values will be converted to strings.
Requires Docker API >= 1.21.
cache_from
list / elements=string
List of image names to consider as cache source.
container_limits
dictionary
A dictionary of limits applied to each container created by the build process.
cpusetcpus
string
CPUs in which to allow execution, e.g., "0-3", "0,1".
cpushares
integer
CPU shares (relative weight).
memory
integer
Set memory limit for build.
memswap
integer
Total memory (memory + swap), -1 to disable swap.
dockerfile
string
Use with state present and source build to provide an alternate name for the Dockerfile to use when building an image.
This can also include a relative path (relative to path).
etc_hosts
dictionary
added in 2.9
Extra hosts to add to /etc/hosts in building containers, as a mapping of hostname to IP address.
http_timeout
integer
Timeout for HTTP requests during the image build operation. Provide a positive integer value for the number of seconds.
network
string
The network to use for RUN build instructions.
nocache
boolean
    Choices:
  • no ←
  • yes
Do not use cache when building an image.
path
path / required
Use with state 'present' to build an image. Will be the path to a directory containing the context and Dockerfile for building an image.
pull
boolean
    Choices:
  • no
  • yes
When building an image downloads any updates to the FROM image in Dockerfile.
The default is currently yes. This will change to no in Ansible 2.12.
rm
boolean
    Choices:
  • no
  • yes ←
Remove intermediate containers after build.
target
string
added in 2.9
When building an image specifies an intermediate build stage by name as a final stage for the resulting image.
use_config_proxy
boolean
    Choices:
  • no
  • yes
If set to yes and a proxy configuration is specified in the docker client configuration (by default $HOME/.docker/config.json), the corresponding environment variables will be set in the container being built.
Needs Docker SDK for Python >= 3.7.0.
buildargs
dictionary
Provide a dictionary of key:value build arguments that map to Dockerfile ARG directive.
Docker expects the value to be a string. For convenience any non-string values will be converted to strings.
Requires Docker API >= 1.21.
Please use build.args instead. This option will be removed in Ansible 2.12.
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
container_limits
dictionary
A dictionary of limits applied to each container created by the build process.
Please use build.container_limits instead. This option will be removed in Ansible 2.12.
cpusetcpus
string
CPUs in which to allow execution, e.g., "0-3", "0,1".
cpushares
integer
CPU shares (relative weight).
memory
integer
Set memory limit for build.
memswap
integer
Total memory (memory + swap), -1 to disable swap.
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
dockerfile
string
Use with state present and source build to provide an alternate name for the Dockerfile to use when building an image.
This can also include a relative path (relative to path).
Please use build.dockerfile instead. This option will be removed in Ansible 2.12.
force
boolean
    Choices:
  • no
  • yes
Use with state absent to un-tag and remove all images matching the specified name. Use with state present to build, load or pull an image when the image already exists. Also use with state present to force tagging an image.
Please stop using this option, and use the more specialized force options force_source, force_absent and force_tag instead.
This option will be removed in Ansible 2.12.
force_absent
boolean
added in 2.8
    Choices:
  • no ←
  • yes
Use with state absent to un-tag and remove all images matching the specified name.
force_source
boolean
added in 2.8
    Choices:
  • no ←
  • yes
Use with state present to build, load or pull an image (depending on the value of the source option) when the image already exists.
force_tag
boolean
added in 2.8
    Choices:
  • no ←
  • yes
Use with state present to force tagging an image.
http_timeout
integer
Timeout for HTTP requests during the image build operation. Provide a positive integer value for the number of seconds.
Please use build.http_timeout instead. This option will be removed in Ansible 2.12.
load_path
path
Use with state present to load an image from a .tar file.
Set source to load if you want to load the image. The option will be set automatically before Ansible 2.12 if this option is used (except if path is specified as well, in which case building will take precedence). From Ansible 2.12 on, you have to set source to load.
name
string / required
Image name. Name format will be one of: name, repository/name, registry_server:port/name. When pushing or pulling an image the name can optionally include the tag by appending ':tag_name'.
Note that image IDs (hashes) are not supported.
nocache
boolean
    Choices:
  • no ←
  • yes
Do not use cache when building an image.
Please use build.nocache instead. This option will be removed in Ansible 2.12.
path
path
Use with state 'present' to build an image. Will be the path to a directory containing the context and Dockerfile for building an image.
Set source to build if you want to build the image. The option will be set automatically before Ansible 2.12 if this option is used. From Ansible 2.12 on, you have to set source to build.
Please use build.path instead. This option will be removed in Ansible 2.12.

aliases: build_path
pull
boolean
    Choices:
  • no
  • yes
When building an image downloads any updates to the FROM image in Dockerfile.
Please use build.pull instead. This option will be removed in Ansible 2.12.
The default is currently yes. This will change to no in Ansible 2.12.
push
boolean
    Choices:
  • no ←
  • yes
Push the image to the registry. Specify the registry as part of the name or repository parameter.
repository
string
Full path to a repository. Use with state present to tag the image into the repository. Expects format repository:tag. If no tag is provided, will use the value of the tag parameter or latest.
rm
boolean
    Choices:
  • no
  • yes ←
Remove intermediate containers after build.
Please use build.rm instead. This option will be removed in Ansible 2.12.
source
string
added in 2.8
    Choices:
  • build
  • load
  • pull
  • local
Determines where the module will try to retrieve the image from.
Use build to build the image from a Dockerfile. build.path must be specified when this value is used.
Use load to load the image from a .tar file. load_path must be specified when this value is used.
Use pull to pull the image from a registry.
Use local to make sure that the image is already available on the local docker daemon, i.e. do not try to build, pull or load the image.
Before Ansible 2.12, the value of this option will be auto-detected to be backwards compatible, but a warning will be issued if it is not explicitly specified. From Ansible 2.12 on, auto-detection will be disabled and this option will be made mandatory.
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.
state
string
    Choices:
  • absent
  • present ←
  • build
Make assertions about the state of an image.
When absent an image will be removed. Use the force option to un-tag and remove all images matching the provided name.
When present check if an image exists using the provided name and tag. If the image is not found or the force option is used, the image will either be pulled, built or loaded, depending on the source option.
By default the image will be pulled from Docker Hub, or the registry specified in the image's name. Note that this will change in Ansible 2.12, so to make sure that you are pulling, set source to pull. To build the image, provide a path value set to a directory containing a context and Dockerfile, and set source to build. To load an image, specify load_path to provide a path to an archive file. To tag an image to a repository, provide a repository path. If the name contains a repository path, it will be pushed.
*Note:* state=build is DEPRECATED and will be removed in Ansible 2.11. Specifying build will behave the same as present.
tag
string
Default:
"latest"
Used to select an image when pulling. Will be added to the image when pushing, tagging or building. Defaults to latest.
If name parameter format is name:tag, then tag value from name will take precedence.
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.
use_tls
string
    Choices:
  • no
  • encrypt
  • verify
DEPRECATED. Whether to use tls to connect to the docker daemon. Set to encrypt to use TLS. And set to verify to use TLS and verify that the server's certificate is valid for the server.
*Note:* If you specify this option, it will set the value of the tls or validate_certs parameters if not set to no.
Will be removed in Ansible 2.11.
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

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://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 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: pull an image
  docker_image:
    name: pacur/centos-7
    source: pull

- name: Tag and push to docker hub
  docker_image:
    name: pacur/centos-7:56
    repository: dcoppenhagan/myimage:7.56
    push: yes
    source: local

- name: Tag and push to local registry
  docker_image:
    # Image will be centos:7
    name: centos
    # Will be pushed to localhost:5000/centos:7
    repository: localhost:5000/centos
    tag: 7
    push: yes
    source: local

- name: Add tag latest to image
  docker_image:
    name: myimage:7.1.2
    repository: myimage:latest
    # As 'latest' usually already is present, we need to enable overwriting of existing tags:
    force_tag: yes
    source: local

- name: Remove image
  docker_image:
    state: absent
    name: registry.ansible.com/chouseknecht/sinatra
    tag: v1

- name: Build an image and push it to a private repo
  docker_image:
    build:
      path: ./sinatra
    name: registry.ansible.com/chouseknecht/sinatra
    tag: v1
    push: yes
    source: build

- name: Archive image
  docker_image:
    name: registry.ansible.com/chouseknecht/sinatra
    tag: v1
    archive_path: my_sinatra.tar
    source: local

- name: Load image from archive and push to a private registry
  docker_image:
    name: localhost:5000/myimages/sinatra
    tag: v1
    push: yes
    load_path: my_sinatra.tar
    source: load

- name: Build image and with build args
  docker_image:
    name: myimage
    build:
      path: /path/to/build/dir
      args:
        log_volume: /var/log/myapp
        listen_port: 8080
    source: build

- name: Build image using cache source
  docker_image:
    name: myimage:latest
    build:
      path: /path/to/build/dir
      # Use as cache source for building myimage
      cache_from:
        - nginx:latest
        - alpine:3.8
    source: build

Return Values

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

Key Returned Description
image
dictionary
success
Image inspection results for the affected image.


Status

Authors

  • Pavel Antonov (@softzilla)
  • Chris Houseknecht (@chouseknecht)
  • Sorin Sbarnea (@ssbarnea)

Hint

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