DevOps Dictionary

Flux CD is a GitOps controller for Kubernetes that automates application and infrastructure deployments by continuously reconciling what’s running in a cluster with the desired state stored as manifests in Git. It watches one or more Git repositories, detects changes, and applies them to the cluster, while also detecting drift (when the live cluster differs from Git) and correcting it. This provides a consistent, auditable deployment workflow where Git becomes the source of truth and rollbacks are as simple as reverting a commit.

With Flux CD, teams get repeatable deployments, clearer change history, and faster recovery from misconfigurations; without it, updates are often driven by manual kubectl actions or ad hoc pipelines, increasing drift, inconsistency across environments, and hard-to-debug incidents. This gap exists because Kubernetes is dynamic and many actors can change cluster state, so an always-on reconciler is needed to keep reality aligned with intent.