Developer Migrates Jenkins Freestyle Jobs to Declarative Pipelines on AWS

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A developer documented their process of setting up Jenkins on an AWS Ubuntu EC2 instance, configuring Docker-out-of-Docker to allow Jenkins to build images via the host machine's Docker socket. The project initially used Freestyle jobs to run Node.js commands, but their limitations in handling multi-step workflows prompted a migration to Pipeline jobs written in Groovy. The new declarative pipeline, stored as a Jenkinsfile directly in the repository, defined clear stages for code checkout, dependency installation, testing, artifact packaging, and pushing Docker images to DockerHub. Credentials were secured using Jenkins' Secret text plugin within a withCredentials block to prevent sensitive data from appearing in build logs. The developer plans to extend the setup with Multibranch Pipelines and Jenkins Parameters to further automate and configure builds across multiple repository branches.

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