How to implement automatic deployment of updates to an application on Kubernetes when changes are committed in the Git repository?

To automate the deployment of updates to an application on Kubernetes upon code changes in Git, you can use a CI/CD pipeline integrated with Git and Kubernetes. The main steps are:

1. Set up a CI system (e.g., Jenkins, GitLab CI, GitHub Actions) that, upon a push to the repository:

   • Builds and tests the application.
   • Creates a new Docker image with the updated version.
   • Publishes the image to a Docker registry.

2. Set up CD to update the deployment in Kubernetes:

   • You can use tools like Argo CD or Flux, which monitor changes in the Git repository with Kubernetes manifests and automatically apply them.
   • Alternatively, configure a script that updates the image tag in the manifests and applies them via kubectl.

Thus, when code changes are committed, it triggers an automatic build and deployment of the new application version in Kubernetes.