# 2023-03-25

## (Backward Compatibility Break) Docker no longer installed by default

The playbook used to install Docker and the Docker SDK for Python by default, unless you turned these off by setting `mash_playbook_docker_installation_enabled` and `devture_docker_sdk_for_python_installation_enabled` (respectively) to `false`.

From now on, both of these variables default to `false`. An empty inventory file will not install these components.

**Most** users will want to enable these, just like they would want to enable [Traefik](docs/services/traefik.md) and [Postgres](docs/services/postgres.md), so why default them to `false`? The answer is: it's cleaner to have "**everything** is off by default - enable as you wish" and just need to add stuff, as opposed to "**some** things are on, **some** are off - toggle as you wish".

To enable these components, you need to explicitly add something like this to your `vars.yml` file:

```yaml
########################################################################
#                                                                      #
# Docker                                                               #
#                                                                      #
########################################################################

mash_playbook_docker_installation_enabled: true

devture_docker_sdk_for_python_installation_enabled: true

########################################################################
#                                                                      #
# /Docker                                                              #
#                                                                      #
########################################################################
```

Our [example vars.yml](examples/vars.yml) file has been updated, so that new hosts created based on it will have this configuration by default.


# 2023-03-15

## Initial release

This is the initial release of this playbook.