Underwear is a library for easily deploying any Python-powered web application to one or more Linux servers. Underwear is configurable by a YAML template and takes care of installing packages, configuring web/WSGI servers, and securing the server.
What Problem Does Underwear Solve?¶
Despite the advent of configuration management tools such as Puppet, Chef, Ansible, and Salt, it remains difficult to deploy a web application because you have to first learn one of those tools and then write scripts in the tool’s domain-specific language.
Underwear makes deploying to a traditional Linux server stack as easy as deploying to Heroku by providing a pre-packaged, easily configurable library. Deployments can be executed simply by installing Underwear with pip, specifying the IP addresses of the server(s) to deploy to, then running a couple of commands.
After these ten steps your app should be completely configured, secured, and deployed to remote servers.
These instructions will be simplied in future releases as the library is further developed.
Install Underwear to your virtualenv:
pip install underwear
Add ‘underwear’ to INSTALLED_APPS in your Django project. Underwear currently only supports Django (Flask and Bottle will be added in the 0.5 release).
Create a deploy directory under your Django project:
mkdir deploy; cd deploy
Download the Fabric file for uploading SSH keys, YAML configuration template, and hosts file to your project under the deploy/ directory:
wget https://raw.github.com/makaimc/underwear/master/underwear/deploy/fabfile.py wget https://raw.github.com/makaimc/underwear/master/underwear/deploy/underwear.yml wget https://raw.github.com/makaimc/underwear/master/underwear/deploy/hosts
Fill in blank variables fields in fabfile.py.
Execute the Fabric script (the script will prompt you for the non-root password):
Fill in blank fields and modify desired settings in the underwear.yml file so that Underwear knows where to install your web application.
Fill in the hosts file with your servers’ IP addresses. For example, the file may look like the following:
[webservers] 192.168.1.1 [dbservers] 192.168.1.2
Deploy your application:
python manage.py deploy
Underwear will output each step in the deployment process to standard output as it happens.
Access your application from the domain name you provided in the underwear.yml file.
License and Documentation¶
Underwear is free software under the MIT license.
Additional Underwear documentation can be found on Read the Docs.
About the Name “Underwear”¶
This library goes underneath your WSGI application to help you quickly deploy it to traditional servers. Otherwise no one knows you’re using it, and you can swap it out at any time for another deployment process when you outgrow the standard LAMP-stack setup.
There also weren’t any projects on GitHub by the name of underwear that had more than two stars and “underwear” was an open library name on PyPi :)
- Automated WSGI application deployments to a web & database server
- Configurable via a simple YAML template
- Support for ad hoc deployment needs without SSH-ing into remote servers
Underwear is under active development and I use it personally for my Django and Flask side projects. However, the library is not polished or full of automated tests. The code needs a lot of clean up. Eventually the library will mature but for now it’s used to wrap Ansible with a simple Python interface and test what can be done with WSGI deployments.