Hello DevOps

A tiny WordPress plugin used to validate a CI/CD pipeline with GitHub Actions and rsync deployments.

It adds:

• A shortcode: [karim_devops_hello]
• An admin notice for administrators

Display:

Hello WordPress world, this is Karim DevOps

Repository Structure

Hello-DevOps/
├─ hello-devops.php             # Main plugin file
├─ README.md                    # Readme
└─ .github/
   └─ workflows/
      └─ deploy.yml             # GitHub Actions workflow for zero-downtime deploy

Why This Avoids Downtime

In a traditional “FTP upload” or simple rsync directly into wp-content/plugins/Hello-DevOps:

• Files can change while PHP is executing.
• You might have some files updated and others not yet.
• During that window, the plugin code can be incomplete → fatal errors / broken site.

With this zero-downtime approach:

1. A new release directory is created (e.g. bloodhound-20251117_113500-ghi9abc).

2. All plugin files are rsynced into this new folder.

3. Only when the folder is fully ready, the workflow runs:

   ln -sfn "$NEW_RELEASE_PATH" "${CURRENT_LINK}"

   • ln -sfn updates the symlink atomically.
   • At the filesystem level, the pointer changes almost instantly.
   • If a PHP request starts before the switch, it uses the old code.
   • If it starts after, it uses the new code.
   • There is no “in-between state”.

This is the core of zero-downtime: all code changes appear at once, and the live path is never half-updated.

Plugin Details

• Name: Hello DevOps
• Slug (directory): hello-devops
• Main file: hello-devops.php
• Version: 1.0.0

Features

• ✅ Simple “hello world” style plugin
• ✅ Shortcode to display a message on any page/post
• ✅ Admin dashboard notice (visible to admins only)
• ✅ Designed to work out-of-the-box with the provided deploy.yml workflow
• ✅ Suitable as a base for more advanced DevOps tests

Usage

1. Activate the Plugin

1. Copy the plugin folder Hello-DevOps to:

   
   wp-content/plugins/Hello-DevOps