docker_machine – Docker Machine inventory source

Synopsis

  • Get inventory hosts from Docker Machine.

  • Uses a YAML configuration file that ends with docker_machine.(yml|yaml).

  • The plugin sets standard host variables ansible_host, ansible_port, ansible_user and ansible_ssh_private_key.

  • The plugin stores the Docker Machine ‘env’ output variables in dm_ prefixed host variables.

Requirements

The below requirements are needed on the local master node that executes this inventory.

Parameters

Parameter Choices/Defaults Configuration Comments
compose
dictionary
Default:
{}
Create vars from jinja2 expressions.
daemon_env
string
    Choices:
  • require ←
  • require-silently
  • optional
  • optional-silently
  • skip
Whether docker daemon connection environment variables should be fetched, and how to behave if they cannot be fetched.
With require and require-silently, fetch them and skip any host for which they cannot be fetched. A warning will be issued for any skipped host if the choice is require.
With optional and optional-silently, fetch them and not skip hosts for which they cannot be fetched. A warning will be issued for hosts where they cannot be fetched if the choice is optional.
With skip, do not attempt to fetch the docker daemon connection environment variables.
If fetched successfully, the variables will be prefixed with dm_ and stored as host variables.
groups
dictionary
Default:
{}
Add hosts to group based on Jinja2 conditionals.
keyed_groups
list
Default:
[]
Add hosts to group based on the values of a variable.
plugin
- / required
    Choices:
  • docker_machine
token that ensures this is a source file for the docker_machine plugin.
running_required
boolean
    Choices:
  • no
  • yes ←
when true, hosts which Docker Machine indicates are in a state other than running will be skipped.
strict
boolean
    Choices:
  • no ←
  • yes
If yes make invalid entries a fatal error, otherwise skip and continue.
Since it is possible to use facts in the expressions they might not always be available and we ignore those errors by default.
verbose_output
boolean
    Choices:
  • no
  • yes ←
when true, include all available nodes metadata (e.g. Image, Region, Size) as a JSON object named docker_machine_node_attributes.

Examples

# Minimal example
plugin: docker_machine

# Example using constructed features to create a group per Docker Machine driver
# (https://docs.docker.com/machine/drivers/), e.g.:
#   $ docker-machine create --driver digitalocean ... mymachine
#   $ ansible-inventory -i ./path/to/docker-machine.yml --host=mymachine
#   {
#     ...
#     "digitalocean": {
#       "hosts": [
#           "mymachine"
#       ]
#     ...
#   }
strict: no
keyed_groups:
  - separator: ''
    key: docker_machine_node_attributes.DriverName

# Example grouping hosts by Digital Machine tag
strict: no
keyed_groups:
  - prefix: tag
    key: 'dm_tags'

# Example using compose to override the default SSH behaviour of asking the user to accept the remote host key
compose:
  ansible_ssh_common_args: '"-o StrictHostKeyChecking=accept-new"'

Status

Authors

  • Ximon Eighteen (@ximon18)

Hint

If you notice any issues in this documentation, you can edit this document to improve it.

Hint

Configuration entries for each entry type have a low to high priority order. For example, a variable that is lower in the list will override a variable that is higher up.