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Flux v2

Flux is a tool for keeping Kubernetes clusters in sync with sources of configuration (like Git repositories), and automating updates to configuration when there is new code to deploy.

Flux version 2 ("Flux v2") is built from the ground up to use Kubernetes' API extension system, and to integrate with Prometheus and other core components of the Kubernetes ecosystem. In version 2, Flux supports multi-tenancy and support for syncing an arbitrary number of Git repositories, among other long-requested features.

Flux v2 is constructed with the GitOps Toolkit, a set of composable APIs and specialized tools for building Continuous Delivery on top of Kubernetes.

Who is Flux for?

Flux helps

  • cluster operators who automate provision and configuration of clusters;
  • platform engineers who build continuous delivery for developer teams;
  • app developers who rely on continuous delivery to get their code live.

The GitOps Toolkit is for platform engineers who want to make their own continuous delivery system, and have requirements not covered by Flux.

What can I do with Flux?

Flux is based on a set of Kubernetes API extensions ("custom resources"), which control how git repositories and other sources of configuration are applied into the cluster ("synced"). For example, you create a GitRepository object to mirror configuration from a Git repository, then a Kustomization object to sync that configuration.

Flux works with Kubernetes' role-based access control (RBAC), so you can lock down what any particular sync can change. It can send notifications to Slack and other like systems when configuration is synced and ready, and receive webhooks to tell it when to sync.

The flux command-line tool is a convenient way to bootstrap the system in a cluster, and to access the custom resources that make up the API.

overview

Where do I start?

Get started with Flux v2!

Following this guide will just take a couple of minutes to complete: After installing the flux CLI and running a couple of very simple commands, you will have a GitOps workflow setup which involves a staging and a production cluster.

More detail on what's in Flux

Features:

  • Source configuration from Git and Helm repositories, and S3-compatible buckets (e.g., Minio)
  • Kustomize and Helm support
  • Event-triggered and periodic reconciliation
  • Integration with Kubernetes RBAC
  • Health assessment (clusters and workloads)
  • Dependency management (infrastructure and workloads)
  • Alerting to external systems (webhook senders)
  • External events handling (webhook receivers)
  • Configuration update automation (automated patching)
  • Policy-driven validation (OPA, admission controllers)
  • Seamless integration with Git providers (GitHub, GitLab, Bitbucket)
  • Interoperability with workflow providers (GitHub Actions, Tekton, Argo)
  • Interoperability with Cluster API (CAPI) providers

Community

The Flux project is always looking for new contributors and there are a multitude of ways to get involved. Depending on what you want to do, some of the following bits might be your first steps:

Upcoming Events

We are looking forward to seeing you with us!