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Assembler

Assembler allows you to easily construct and package docker containers using existing config scripts. Currently you can build containers using saltstack only, but there are plans to add the ability to provision using any configuration management tool such as puppet, chef, and ansible.

Requirements

• Docker
• PHP 5.4+
• Salt

Install

Via Composer

Usage

Assembler uses Robo to run tasks on the command line. This allows Assembler to wrap docker commands, so you will need to have docker installed wherever you run it. There is a vagrant file in the root of this repo that will bootstrap ubuntu/trusty64 with docker and php5 which will allow you to run assembler. Additionally you will need to configure an ssh forward agent by:

then append:

then run if you do not already have an id_rsa key:

then just call vagrant up.

If everything goes according to plan, you should be able to start running assembler.

Terminology

This project extends a metaphor from manufacturing to building and deploying applications. Docker containers are packaged based on settings specified in a product line.

Product Line

A product line is simply a yaml file specifying the raw goods or base services that your product needs to run.

Consider the following example:

The above yaml represents a product line that tells assembler you want a container with mysql that has a root user with a password of password. Additionally it tells assembler where to find those raw goods as suppliers. You will need salt states available for each of the raw goods to be provisioned onto the Docker container.

Stocking

You stock goods by running assembler:stock and specifying a product line to stock example below:

The above command will find the my_webserver.yml file git clone the raw goods and automatically generate a top.sls file for use by salt

Fabricating

You 'fabricate' containers based on a base image derived from a docker file for example:

The above command will build a base image based on the specified docker file.

Loading

You 'load' containers with the raw goods specified in your production line for example:

The above command will load all of the goods from the specified path. The '/path/to/goods' would be the same path specified by --goods-path in the stock task.

Packaging

You 'package' containers that have been stocked, fabricated, and loaded. For example:

This will commit the specified containerid into a docker image additionally if you specify the --push flag the package command will actually push the committed image to myrepo/name. To push you will need to specify your username, password, and email for the dockerregistry you are pushing to.

Making

The make command will do everything in one fail swoop. For example:

will stock, fabricate, load, and package your containers

Shipping

The ship command will login to a Docker host server via SSH and pull a Docker image and run the container instance.

The above command will login to the server 192.168.1.100 via SSH and execute the following commands as sudo:

Provisioning

Configuration

You can specify which cloud provider assembler needs to ship the container to via the provisioning.yaml file. You will keep your public api token for individual providers here, along with any default ssh keys you like to be installed on the newly provisioned box. There is an example file in the config directory here, or you can look at the example below.

userData key provides a path to a DigitalOcean cloud config script. This will be executed during your droplet's creation and can be used for provisioning.

Running

You can provision a server on digital ocean using the 'provision' command as below:

The above will use the information in your config file to create a droplet on digital ocean with the specified hostname as 'my_host_name'. A .machine file will be created with the form .machinemyhostname and will contain data about the created machine below is an example

You can destroy the cloud server using the 'destroy' command as below:

Where the value .machinemyhostname is the path to the machine file provisioned before

Testing

Contributing

Please see CONTRIBUTING for details.

Security

If you discover any security related issues, please email [email protected], [email protected], or [email protected] instead of using the issue tracker.

License

The MIT License (MIT). Please see License File for more information.