Continuous Integration (CI) and Continuous Deployment (CD) pipelines are the backbone of modern software development. Here's an explanation of the process:
1. Continuous Integration (CI):
- Developers work on their code locally, making changes and improvements.
- As soon as they're ready to integrate their changes into the main codebase, they push their code to a version control system (like Git).
- Upon pushing the changes, the CI server (such as Jenkins, Travis CI, CircleCI, etc.) detects the new code and triggers an automated build process.
- During the build process, the CI server pulls the latest code from the repository, compiles the code, runs automated tests, and performs other necessary checks.
- If any issues are detected during this process (such as failing tests or compilation errors), the CI server notifies the developers immediately, allowing them to address the problems promptly.
2. Continuous Deployment (CD):
- Once the CI process is successfully completed and the code passes all tests, it's ready for deployment.
- In a CD pipeline, the CI server can automatically deploy the code to various environments (like development, staging, or production) based on predefined rules and configurations.
- Deployment can involve various steps such as packaging the application, provisioning infrastructure (if necessary), configuring services, and deploying the application.
- Automated deployment ensures consistency and reliability, reducing the risk of errors that may occur during manual deployment processes.
- Continuous Deployment pipelines often include additional steps like smoke testing or integration testing in the deployed environment to ensure that the application behaves as expected in its production environment.
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