Flux

Flux is a leading solution for Kubernetes management in the space called "GitOps' - which means reducing your infrastructure deployments to code.

https://fluxcd.io/

Digital Ocean mentions Flux in this blog post which also covers some of the offerings at Digital Ocean such as managed Kubernetes https://www.digitalocean.com/blog/what-is-gitops

GitOps is a DevOps practice that uses Git repositories to manage infrastructure and application code deployments. It's an evolution of Infrastructure as Code (IaC) that uses Git pull requests to verify and automatically deploy system infrastructure modifications. GitOps can help organizations: Improve efficiency and security, Improve the developer experience, Reduce costs, Speed up deployments, and Maintain consistency across all infrastructure.