Docker, CI/CD, and Major PaaS Platforms: An Overview of OpenShift, Cloud Foundry, Heroku, Ansible, and Cloudify
This article introduces Docker as a container engine, explains continuous integration and continuous deployment practices, and surveys major PaaS solutions—including OpenShift, Cloud Foundry, Heroku—as well as automation tools like Ansible and Cloudify, highlighting their roles in modern cloud computing.
Background
Docker is an open‑source application container engine that lets developers package their applications and dependencies into a portable container that can be deployed on any popular Linux machine, providing isolation through sandbox mechanisms.
Continuous integration (CI) is a software development practice where team members frequently integrate their work, often at least once per day, with each integration automatically built, compiled, released, and tested to catch integration errors early.
Continuous deployment (CD) extends CI by automating the build, test, and deployment pipeline to deliver high‑quality products quickly, improving engineering productivity and reducing manual effort.
OpenShift is Red Hat's cloud platform‑as‑a‑service (PaaS) that supports multiple programming languages and frameworks (e.g., Java, Ruby, PHP) and integrates with development tools such as Eclipse, JBoss Developer Studio, and Jenkins.
Cloud Foundry is VMware's open‑source PaaS that supports many frameworks, languages, runtimes, and services, allowing developers to deploy and scale applications within seconds on both large data centers and a single desktop using the same codebase.
Heroku started in 2007 as a Ruby‑only platform and later added support for Java, Node.js, Scala, Clojure, Python, and unofficially PHP and Perl; its underlying OS is Debian, with newer stacks based on Ubuntu.
Ansible is a Python‑based automation tool that combines the strengths of Puppet, Chef, and other configuration‑management systems to perform bulk system configuration, application deployment, and command execution.
Cloudify is an orchestration system that automates the deployment of cloud applications across heterogeneous cloud environments.
Main Content
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