# ExrmDocker

Create a Docker image from your Elixir release

## Usage

To create a new Docker image simply run:
```shell
mix release --docker
```

This will output the `docker build` result with the created image id.

To specify docker image tag you can use `--tag` option:

```shell
mix release --docker --tag=test:0.3

docker images
REPOSITORY   TAG   IMAGE ID       CREATED         VIRTUAL SIZE
test         0.3   6d3d5f9abac4 6 seconds ago      224.3 MB
```
by default it uses project name.

Once your image has been built, start a new container.

- `docker run -itd <image_id> console`

Next you can attach to your container.

- `docker attach <container_id>`

And detach using `Ctrl-p Ctrl-q`.


Check below for configuration options.

## Installation
#### Add exrm_docker to your list of dependencies in `mix.exs`:
```elixir
  def deps do
    [{:exrm_docker, "~> 0.2.1"}]
  end
```
## exrm_docker config.exs

 Key             | Default                                      | Description
---------------- | -------------------------------------------- | ---------------------------------------------------
 image           | centos                                       | Which image to use
 version         | nil                                          | Which image version to use
 maintainer      | nil                                          | Image maintainer
 copy_rel        | COPY rel /rel                                | Copy the release to the container
 pre_copy        | nil                                          | Any Dockerfile commands before copy
 post_copy       | nil                                          | Any Dockerfile commands after copy
 entrypoint      | ENTRYPOINT ["rel/#{project}/bin/#{project}"] | Entrypoint of the image
 entrypoint_args | nil                                          | Arguments to use for the entrypoint, e.g. 'console'