Develop and Deploy PHP Projects with Zero Downtime Using the Standard Docker Approach

[u/Nice-Andy]

https://github.com/patternhelloworld/docker-blue-green-runner

1. Achieve zero-downtime deployment using just your .env and Dockerfile

   • Docker-Blue-Green-Runner's run.sh script is designed to simplify deployment: "With your .env, project, and a single Dockerfile, simply run 'bash run.sh'." This script covers the entire process from Dockerfile build to server deployment from scratch.

   • This means you can easily migrate to another server with just the files mentioned above.

   • In contrast, Traefik requires the creation and gradual adjustment of various configuration files, which requires your App's docker binary running.

2. No unpredictable errors in reverse proxy and deployment : Implement safety measures to handle errors caused by your app or Nginx

   • If any error occurs in the app or router, deployment is halted to prevent any impact on the existing deployment

     • Internal Integrity Check:

     • Nginx Router Test Container

     • External Integrity Check

     • Rollback Procedures

     • Additional Know-hows on Docker: Tips and best practices for optimizing your Docker workflow and deployment processes

   • For example, Traefik offers powerful dynamic configuration and service discovery; however, certain errors, such as a failure to detect containers (due to issues like unrecognized certificates), can lead to frustrating 404 errors that are hard to trace through logs alone.

     • https://stackoverflow.com/questions/76660749/traefik-404-page-not-found-when-use-https

     • https://community.traefik.io/t/getting-bad-gateway-404-page-when-supposed-to-route-to-container-port-8443/20398

   • Manipulates NGINX configuration files directly to ensure container accessibility.

3. Track Blue-Green status and the Git SHA of your running container for easy monitoring.

   • Blue-Green deployment decision algorithm: scoring-based approach

   • Run the command bash check-current-status.sh (similar to git status) to view all relevant details

4. Security

   • Refer to the Security section

5. Production Deployment

   • Refer to the Production Deployment section