Getting Started with CI/CD: A Beginner's Guide to Continuous Integration and Continuous Deployment

The end of the series about the basic concepts of DevOps, CI/CD for beginners. There are two parts:

Part 1: Deciphering DevOps: what is is & why its important

Part 2: Getting Started with CI/CD: A Beginner's Guide to Continuous Integration and Continuous Deployment.


What is CI (Continuous Integration)?

CI stands for Continuous Integration, which is a practice of software development that involves integrating the code changes from multiple developers or sources into a shared repository frequently and automatically. CI aims to improve the quality, speed, and efficiency of software development by detecting and resolving errors and bugs early and often. CI also enables faster feedback and collaboration among the developers and other stakeholders involved in the software lifecycle.

Some of the benefits of CI are:

  • Reduced errors and bugs: CI helps to reduce the errors and bugs in the software by running automated tests and code analysis on every code change. This ensures that the code is always in a working and stable state, and that any issues are identified and fixed quickly.
  • Faster delivery time: CI helps to speed up the delivery time of software by eliminating the need for manual integration and testing. This reduces the delays and bottlenecks that may occur in the development process, and enables faster deployment of new features and updates.
  • Higher quality: CI helps to improve the quality of software by enforcing consistent coding standards and best practices. This ensures that the code is readable, maintainable, and secure, and that it meets the customer's needs and expectations.
  • Lower costs: CI helps to lower the costs of software development and maintenance by optimising the use of resources and eliminating waste. CI also reduces the costs of downtime and recovery by enhancing the reliability and availability of software.
  • Higher customer satisfaction: CI helps to increase customer satisfaction by delivering software that is functional, reliable, and up-to-date. CI also improves customer loyalty by providing better support and service.

Some of the tools that support CI are:

  • Git is a distributed version control system that allows developers to track and manage their code changes. Git enables developers to create branches for different features or tasks, merge their code changes with others, and resolve any conflicts that may arise.
  • Jenkins is an open-source automation server that facilitates continuous integration and delivery. Jenkins allows developers to create pipelines that automate the processes of building, testing, deploying, and monitoring their software.
  • Selenium is an open-source framework for automated testing of web applications. Selenium allows developers to write test scripts in various programming languages, such as Java, Python, Ruby, or C#, and run them on different browsers and platforms.
  • SonarQube is an open-source platform for code quality analysis. SonarQube allows developers to measure and improve the quality of their code by detecting issues such as bugs, vulnerabilities, code smells, duplications, or technical debt.

What is CD (Continuous Deployment)?

CD (Continuous Deployment) is a software engineering approach in which software functionalities are delivered frequently and through automated deployments. It means that every change in the code that passes the predefined tests is automatically released to the production environment, where it is usable by customers

Some of the benefits of CI are:

  • Correctness of automation script can be verified at the creation time
  • Automated scripts can easily pick the task for each environment
  • Automation prevent the occurrence of human error
  • Automated deployments, easily repeatable, lesser time-to-market, less impact with downtime 

Some of the tools that support CI are:

  • AWS CodeDeploy: A fully managed service that automates software deployments to a variety of compute services such as Amazon EC2, AWS Fargate, AWS Lambda, and your on-premises servers. It allows you to rapidly release new features, update applications, and avoid downtime.
  • GitLab CI/CD: A complete DevOps platform that provides a single application for the entire software development lifecycle. It includes a powerful CI/CD tool that allows you to build, test, and deploy your code from a single interface. You can also monitor and optimise your software performance with GitLab's built-in metrics and dashboards.
  • Jenkins: An open-source automation server that enables you to build, test, and deploy your software projects continuously. It supports hundreds of plugins that extend its functionality and integrate with various tools and platforms. You can also create pipelines as code using Jenkinsfile and run them on distributed agents.
  • DeployHQ is a service that helps developers to deploy their websites from Git, SVN and Mercurial repositories to their own servers. It simplifies the process of deployment by automating the tasks such as copying files, running commands, and configuring settings. It also supports various technologies and platforms, such as .NET, Java, Node.js, Docker, Kubernetes, Azure, AWS, and more. You can also monitor and optimise your software performance with DeployHQ's built-in metrics and dashboards. DeployHQ is a deployment tool that makes deployment easy and fast

Duoc Le, DevOps @UnDigital®

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