Creating Docker Images

Available since version 0.10.0

Use the dockerize command to create a Docker image from the project. Images created from Anaconda Projects are configured to execute a single defined command in the anaconda-project.yml file chosen at build time.

The dockerize command uses source-to-image (s2i) to build Docker images using the s2i-anaconda-project builder images that have been uploaded to Docker Hub.

Images built with dockerize will have a fully prepared env_spec for the desired command and expose port 8086 if the command listens for HTTP requests.

Prerequisites

In order to utilize the dockerize command you will need to have Docker and source-to-image (s2i) installed.

You can install s2i using Conda

conda install -c ctools source-to-image

Quickstart

  1. Build a docker image to run a supplied command

    anaconda-project dockerize --command <command-name> -t <image name>

  2. Run the Docker image and publish port 8086

    docker run -p 8086:8086 <image name>

It is necessary to add -p 8086:8086 in order to publish port 8086 from the anaconda-project container out to the host. The second entry in the -p flag must be 8086 while the first entry can be any valid unused port on the host. See the Docker container networking docs for more details.

Build Docker images

By default running the dockerize command will create a Docker image to execute the default command.

The default command is determined in the following order

  1. The command named default
  2. The first command listed in the project file if no command is named default

The s2i-anaconda-project builder images have Miniconda and anaconda-project installed. When the dockerize command is run the following steps are performed.

  1. The project is archived to a temporary directory to ensure that files listed in your .projectignore (including the local envs directory) are not copied into the Docker image.
  2. The s2i build command is run from the temporary directory to construct a new Docker image from the builder image.

The steps in the s2i build process are

  1. The temporary project directory is added to the image.
  2. The s2i assemble script is run to prepare the env_spec for the desired command.
  3. Conda clean is run to reduce the size of the output Docker image.

Options

The dockerize command accepts several optional arguments

--command
The named command to execute in the RUN layer of the Docker image. Default: default See the HTTP commands section below.
-t or --tag
The name of the output Docker image in the format name:tag. By default Default: “<project-name>:latest”, where <project-name> is taken from the name tag in the anaconda-project.yml file.
--builder-image
The s2i builder image name to use. Default: conda/s2i-anaconda-project-ubi8 By default this is image is pulled from DockerHub when dockerize is run. See the Custom Builder Image section below to construct your own builder images.
s2i build arguments
Any further arguments or those supplied after -- will be given to the s2i build command. See the s2i build documentation for available build flags.

Builder images

The default builder image for anaconda-project dockerize is conda/s2i-anaconda-project-ubi8. To see other available builder images on DockerHub click here.

HTTP options

When the docker image is run the s2i run script is executed with the supplied command. The full run command is

anaconda-project run $CMD --anaconda-project-port 8086 --anaconda-project-address 0.0.0.0 --anaconda-project-no-browser --anaconda-project-use-xheaders

This ensures that the command communicates over port 8086 if it supports the HTTP Commands.

If your desired command is not an HTTP command or you wish not to use the Jinja2 template features you must add supports_http_options: false to the command specification in the anaconda-project.yml file. When supports_http_options is set to false the HTTP arguments are completely ignored when the command is executed.

Configuring Conda

In addition to the channel configuration available in the anaconda-project.yml file you may need to supply custom Conda configuration parameters in order to build the Docker image.

To provide a custom Conda configuration, place a .condarc file at the top-level of your project directory.

For example, you can use the .condarc to configure access to Anaconda Team Edition or Anaconda Commercial Edition.

Custom builder images

If you want to customize the builder images you can clone the s2i-anaconda-project repository, build the images. The custom builder images can be provided to anaconda-project dockerize using the --builder-image flag.