Navigating Release Engineering - A Step-by-Step Plan

30 August 2012

The Blueprint for a Smooth Release Engineering Process #

Isn’t it satisfying when everything falls into place just as you’d hoped? In the complex world of development, where multiple cogs are in motion at any given time, having a well-defined plan can make all the difference. Here’s a streamlined guide to setting up a robust Release Engineering (Releng) system that ensures efficient and error-free deployments.

Step-by-Step Implementation #

1. Version Control with Git #

We begin by storing all our configuration files and Puppet manifests in a Git repository. It serves as the central hub where changes are tracked and updated.

2. Commit and Push #

Once you make the necessary changes, the next step is to commit those alterations to the Git repository. After committing, push these changes to your Continuous Integration (CI) server. We use Jenkins for this purpose.

3. Automated Testing in CI #

As soon as the new changes hit the CI server, Jenkins kicks in to run a series of automated tests on the manifests and configuration files. These tests act as a sanity check, ensuring that the changes won’t break anything.

4. Failure Notifications #

If any test fails, Jenkins halts the process. Notifications are then immediately sent out through various channels like Jabber, Email, or perhaps even through an eccentric method like a large robotic rabbit, if you’re into that sort of thing.

5. Deployment via Capistrano #

Assuming the tests are successful, Jenkins triggers a deployment process. The manifests and config files are transferred to the Puppetmaster through Capistrano, an automation tool that simplifies complex deployment tasks.

6. Puppet Run with MCollective #

Finally, a Puppet run is initiated across all servers using MCollective. This tool orchestrates the deployment, making sure all servers are updated simultaneously and in sync.

Wrapping Up #

By following this plan, you’ll not only have a more organized approach to release engineering, but you’ll also reduce the likelihood of errors and setbacks. A well-planned process is the cornerstone of successful development, and this guide aims to be just that—a roadmap for a smoother, more reliable engineering pipeline.