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# docker_login – Log into a Docker registry

- Synopsis

- Requirements

- Parameters

- Notes

- Examples

- Return Values

- Status

## Synopsis

- Provides functionality similar to the “docker login” command.

- Authenticate with a docker registry and add the credentials to your local Docker config file. Adding the credentials to the config files allows future connections to the registry using tools such as Ansible’s Docker modules, the Docker CLI and Docker SDK for Python without needing to provide credentials.

- Running in check mode will perform the authentication without updating the config file.

## 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- Docker SDK for Python: Please note that the docker-py Python module has been superseded by docker (see here for details).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)

- Only to be able to logout, that is for state = `absent`: the `docker` command line utility

## 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
config_path path | Default: "~/.docker/config.json" | Custom path to the Docker CLI configuration file. aliases: dockercfg_path
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
email string |  | The email address for the registry account.
password string |  | The plaintext password for the registry account. Required when state is `present`.
reauthorize boolean | Choices: no ← yes | Refresh existing authentication found in the configuration file. aliases: reauth
registry_url string | Default: "https://index.docker.io/v1/" | The registry URL. aliases: registry, url
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: present ← absent | This controls the current state of the user. `present` will login in a user, `absent` will log them out. To logout you only need the registry server, which defaults to DockerHub. Before 2.1 you could ONLY log in. Docker does not support 'logout' with a custom config file.
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.
username string |  | The username for the registry account. Required when state is `present`.
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: Log into DockerHub
      docker_login:
        username: docker
        password: rekcod

    - name: Log into private registry and force re-authorization
      docker_login:
        registry: your.private.registry.io
        username: yourself
        password: secrets3
        reauthorize: yes

    - name: Log into DockerHub using a custom config file
      docker_login:
        username: docker
        password: rekcod
        config_path: /tmp/.mydockercfg

    - name: Log out of DockerHub
      docker_login:
        state: absent

## Return Values

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

Key | Returned | Description
--- | --- | ---
login_results dictionary | when state='present' | Results from the login. Sample: {'email': 'testuer@yahoo.com', 'serveraddress': 'localhost:5000', 'username': 'testuser'}

## Status

- This module is not guaranteed to have a backwards compatible interface. [preview]

- This module is maintained by the Ansible Community. [community]

### Authors

- Olaf Kilian (@olsaki) <olaf.kilian@symanex.com>

- Chris Houseknecht (@chouseknecht)

Hint

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