Which cloud native tool keeps Kubernetes clusters in sync with sources of configuration (like Git repositories), and automates updates to configuration when there is new code to deploy?

Flux and ArgoCD are both widely recognized GitOps tools designed to continuously synchronize the desired state defined in Git repositories with the actual state of Kubernetes clusters. They automate the deployment and update of applications and configurations whenever changes are pushed to the Git repository, embodying the core principles of GitOps.

GitOps Toolkit is a collection of tools from the Flux project, but 'Flux and ArgoCD' are the more comprehensive and distinct tool names commonly associated with this function.

Linkerd and Istio are service mesh implementations used for managing network communication between services, not for syncing cluster configuration from Git.

Helm and Kustomize are package managers and configuration management tools for Kubernetes, respectively, but they do not actively synchronize the cluster state with a Git repository.