Docker can be integrated into a CI/CD pipeline in a number of ways, here are the general steps how you might do it:
1. Source Code Control: Store all application code in a source code control system that can be accessed by both developers and the CI/CD system.
1. Build Phase: – With every commit to the source code, the CI/CD system should automatically pull the updated code. – Create a Dockerfile that will define how to create a Docker image of the application. This should include the application itself, as well as any dependencies it has. – Configure the CI/CD system to build a new Docker image using the Dockerfile anytime the application code is updated.
1. Testing Phase: – Configure the CI/CD pipeline to automatically deploy the newly created Docker image as a container. Depending on your pipeline, you may want to deploy this to a dedicated testing environment. – Run automated tests against the containerized application. If any of these tests fail, the pipeline should stop and alert developers of the issue.
1. Deployment Phase: – If all tests pass, the CI/CD pipeline should push the Docker image to a Docker registry. This registry should be secure and able to be accessed by your deployment system(s). – Configure the CD part of the pipeline to automatically pull the Docker image from the registry and deploy it as a container to the production environment when the conditions you have defined are met, such as passing all tests and approval from a team leader or a specific schedule.
1. Monitoring and Logging Phase: After the new image is deployed, monitor the application and system logs. If any issues are detected during this phase, they should be reported to the appropriate team for inspection and debugging.
Remember Docker allows you to package your application and its dependencies into a single object, which can be moved across different environments in the CI/CD pipeline, making it easier and faster to test and deploy the application.
