As we deploy our Python web apps more frequently, the process of deploying must become more robust. This is especially important when deploys are unsupervised. However, robustness is neither short nor trivial to get right; we butt up against the limitations of simple, linear shell scripts developed ad hoc for each project. Shiva The Deployer is a factoring up of the common parts of deployment scripts so projects can concentrate on their unique needs rather than continnually reinventing (or skimping on) infrastructure.
Shiva provides a light inversion-of-control framework for deployment of Python web projects. It implements the standard but tricky-to-get-thoroughly-correct top-level logic of deployment so all you have to do is, essentially, fill out a form, by writing a Deployment subclass. In addition, it ships with many deployment building blocks to save you the hassle of continually rewriting them.
Features include...
- Automatic deploy-time re-homing of the deploy script into its own virtualenv (complete with dependencies, if you need them), while keeping the project's own dependencies separate
- Time-travel bootstrapping: each version of your project is deployed with the version of the deploy script from it, not one from a previous version.
- Integration with Jenkins, to encourage more hands-free continuous deployment
- A simple, readable way to run shell commands, so you get close to the simplicity of shell scripts but with Python's better flow control
- Locking (to prevent concurrent deploys, for example)
We'll add lots more, as we observe patterns.
We're just getting started. DXR deploys continuously with the progenitor of Shiva, and we're working on implementations for a few more apps as we speak. Help is welcome; we've got tickets!
- 1.0
- No such release yet!