Blue-Green Deployment on Single Machines Starting from Scratch, Using Your Dockerfiles: Examples in PHP, Java, and Node.js

• No Need for Binary Installation Files and Complex Configurations

  • On Linux, you only need to have docker, docker-compose and some helping libraries such as git, curl, bash, yq installed.
  • Can easily migrate the whole system to other Linux servers. (it might be tough to migrate the whole Kubernetes system set up to other servers)

• Suitable for Single-Machine Deployments

  • While Kubernetes excels in multi-machine environments with the support of Layer 7 (L7) technologies (I would definitely use Kubernetes in that case), this approach is ideal for scenarios with low traffic where only one or two machines are available.
  • For deployments involving more machines, traditional Layer 4 (L4) servers could be utilized.

• Building from Dockerfiles, Not Just Using Images

  • Docker Images are binary and do not include the source-building processes, such as composer install, npm run build, or mvn install.
  • By building your project from Dockerfiles, you can fully build your project and achieve zero-downtime blue-green deployments simply by executing run.sh.

https://github.com/Andrew-Kang-G/docker-blue-green-runner