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flux-aio

flux test license release

Flux All-In-One is a lightweight distribution made with Timoni for running the GitOps Toolkit controllers as a single deployable unit (Kubernetes Pod).

This distribution is optimized for running Flux on:

  • Bare clusters without a CNI plugin installed
  • Edge clusters with limited CPU and memory resources
  • Clusters where plain HTTP communication is not allowed between pods
  • Clusters with egress via HTTP/S proxies
  • Serverless clusters for cost optimisation (EKS Fargate)

The versioning of this distribution follows semver with the following format: <flux version>-<distribution release number>, e.g. 2.4.0-0.

Documentation

Quickstart Guide

To deploy Flux on Kubernetes clusters, you'll be using the Timoni CLI and a Timoni Bundle file where you'll define the configuration of the Flux controllers and their settings.

Install the Timoni CLI with:

brew install stefanprodan/tap/timoni

For other installation methods, see timoni.sh.

Install Flux on self-managed clusters

To deploy Flux AIO on a cluster without a CNI, create a Timoni Bundle file named flux-aio.cue with the following content:

bundle: {
	apiVersion: "v1alpha1"
	name:       "flux-aio"
	instances: {
		"flux": {
			module: {
				url:     "oci://ghcr.io/stefanprodan/modules/flux-aio"
				version: "latest"
			}
			namespace: "flux-system"
			values: {
				hostNetwork:     true
				securityProfile: "privileged"
				controllers: notification: enabled: false
			}
		}
	}
}

Apply the bundle with:

timoni bundle apply -f flux-aio.cue

Note that on clusters without kube-proxy, you'll have to add the following env vars to values:

values: env: {
	"KUBERNETES_SERVICE_HOST": "<host>"
	"KUBERNETES_SERVICE_PORT": "<port>"
}

You can fine tune the Flux installation using various options, for more information see the installation guide.

Changes to the flux-aio.cue bundle, can be applied in dry-run mode to see how Timoni will reconfigure Flux on the cluster:

timoni bundle apply -f flux-aio.cue --dry-run --diff

Sync from a public Git repository

To deploy the latest version of Cilium CNI and the metrics-server cluster addon, add the cluster-addons instance to the flux-aio.cue bundle:

bundle: {
	apiVersion: "v1alpha1"
	name:       "flux-aio"
	instances: {
		// flux instance omitted for brevity
		"cluster-addons": {
			module: url: "oci://ghcr.io/stefanprodan/modules/flux-git-sync"
			namespace: "flux-system"
			values: git: {
				url:  "https://github.com/stefanprodan/flux-aio"
				ref:  "refs/heads/main"
				path: "./test/cluster-addons"
			}
		}
	}
}

The above configuration, will instruct Flux to reconcile the HelmRelease manifests from the test/cluster-addons directory.

Apply the bundle with:

timoni bundle apply -f flux-aio.cue

Timoni will configure the Flux Git sync and will wait for Flux to pull the repo and deploy the cluster addons.

For more details on how to sync from private Git repositories and self-hosted Git servers, see the Git sync documentation.

Sync from a bootstrap repository

If you want to use Flux AIO with a bootstrap repository layout, you'll have to add an ignore rule for the flux-system directory and name the sync instance flux-system:

bundle: {
	apiVersion: "v1alpha1"
	name:       "flux-aio"
	instances: {
		// flux instance omitted for brevity
		"flux-system": {
			module: url: "oci://ghcr.io/stefanprodan/modules/flux-git-sync"
			namespace: "flux-system"
			values: {
				git: {
					token:  string @timoni(runtime:string:GITHUB_TOKEN)
					url:    "https://github.com/fluxcd/flux2-kustomize-helm-example.git"
					ref:    "refs/heads/main"
					path:   "clusters/production"
					ignore: "clusters/**/flux-system/"
				}
				sync: wait: false
			}
		}
	}
}

The above configuration, generates the same flux-system objects (GitRepository, Secret, Kustomization) as the flux bootstrap command.

Uninstall Flux

To remove Flux from your cluster, without affecting any reconciled workloads:

flux -n flux-system uninstall