Case study · Open source
Zero Downtime Deployment Toolkit
Deploy PHP applications without downtime. ZDT is an open-source deployment toolkit built with Laravel Zero that performs atomic releases, keeps previous versions instantly available for rollback, and minimizes deployment risk for production environments.
Production · Connected
- Build
- Upload
- Atomic Release
- Health Check
- Traffic Switch
- Cleanup
Deploying production shouldn't require maintenance mode.
Traditional deployments replace application files while users are actively browsing the website. This creates broken requests, missing assets, partially updated code and unnecessary downtime. Even a few seconds of interruption can impact sales, API integrations and customer trust.
Atomic releases with instant rollback.
ZDT uploads every deployment into a new release directory instead of modifying the current application. Once the deployment passes health checks, a single symlink switch instantly activates the new version. If anything goes wrong, rolling back takes only a single command because previous releases remain untouched.
Features
Zero Downtime
Applications remain online throughout deployment.
Atomic Releases
Deployments become active instantly through symlink switching.
Instant Rollback
Restore the previous release in seconds.
SSH Deployments
Deploy securely over SSH without requiring agents on the server.
Multiple Servers
Deploy one project across many production servers.
Environment Management
Keep shared files, storage and environment variables isolated from releases.
Release History
Keep previous releases for auditing and rollback.
Open Source
MIT licensed and fully customizable.
Architecture
Zero Downtime Lifecycle
Visualizing the atomic switch. We prepare everything in isolation before pointing traffic to the new release.
- 01Cloning repositoryprep
- 02Checking out branchprep
- 03Syncing .envprep
- 04Linking sharedprep
- 05Linking custom pathsprep
- 06Composer installprep
- 07Compiling assetsprep
- 08Backup Databaseprep
- 09Run Migrationsprep
- 10Optimizing appprep
- 11Validating releaseprep
- 12Activating releaseatomic
- 13Health checklive
- 14Warming cacheslive
- 15Recording deploymentlive
- 16Cleanup oldlive
Technical Highlights
- Laravel Zero CLI
- Atomic symlink releases
- Shared storage directories
- Environment isolation
- SSH deployment
- Release retention
- Instant rollback
- Health checks
- Production-safe deployments
- Open source
Results
- 0 downtime deployments
- Rollback in seconds
- Repeatable deployments
- Minimal server configuration
- Production ready
- Open source
Zero Downtime PHP Deployments with Laravel Zero
ZDT is an open-source deployment toolkit for PHP applications that enables zero downtime deployments using atomic releases. Instead of replacing files directly on a production server, every deployment creates an isolated release, performs validation, and switches traffic only when the application is ready. This approach dramatically reduces deployment failures while making rollbacks nearly instantaneous.
Whether you're deploying Laravel, WordPress, Symfony or any PHP application, ZDT helps automate deployments without vendor lock-in or complex infrastructure.
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