FluxCD is an open-source tool that streamlines application delivery to Kubernetes clusters by leveraging GitOps principles, where a Git repository acts as the single source of truth for configuration management. Originally created by Weaveworks and now open-sourced, FluxCD integrates seamlessly with Kubernetes, allowing users to automate application deployment by using declarative configuration files similar to Terraform. The tool comprises various controllers, including the Source Controller, Helm Controller, Kustomize Controller, and Notification Controller, each responsible for different facets of the deployment process, such as acquiring artifacts, managing Helm releases, reconciling cluster states, and handling notifications. Through a step-by-step setup, users can install FluxCD and its monitoring stacks, Prometheus and Grafana, to manage and visualize deployments, ensuring that any changes in the Git repository are automatically reflected in the Kubernetes cluster. This approach aligns with the GitOps methodology, enhancing traceability, control, and automation in continuous delivery environments.