Flux CD Has a Free API: GitOps for Kubernetes That's Actually Simple

#fluxcd #gitops #kubernetes #devops

Flux is a CNCF GitOps toolkit for Kubernetes. Unlike Argo CD which needs a central server, Flux runs as controllers inside your cluster — lighter, more Kubernetes-native.

Why Flux?

CNCF graduated — production-ready, widely adopted
Controller-based — no separate server, runs in-cluster
Multi-tenancy — native support for team isolation
Helm + Kustomize — first-class support
Image automation — auto-update images on new releases

Install

# Install CLI
brew install fluxcd/tap/flux

# Bootstrap (installs Flux + connects to Git)
flux bootstrap github \
  --owner=myorg \
  --repository=fleet-infra \
  --branch=main \
  --path=clusters/production \
  --personal

Define Sources

# Git source
apiVersion: source.toolkit.fluxcd.io/v1
kind: GitRepository
metadata:
  name: my-app
  namespace: flux-system
spec:
  interval: 1m
  url: https://github.com/myorg/my-app
  ref:
    branch: main

---
# Helm source
apiVersion: source.toolkit.fluxcd.io/v1
kind: HelmRepository
metadata:
  name: bitnami
  namespace: flux-system
spec:
  interval: 1h
  url: https://charts.bitnami.com/bitnami

Deploy with Kustomize

apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: my-app
  namespace: flux-system
spec:
  interval: 5m
  path: ./k8s
  prune: true
  sourceRef:
    kind: GitRepository
    name: my-app
  healthChecks:
    - apiVersion: apps/v1
      kind: Deployment
      name: my-app
      namespace: default

Deploy with Helm

apiVersion: helm.toolkit.fluxcd.io/v2
kind: HelmRelease
metadata:
  name: redis
  namespace: default
spec:
  interval: 5m
  chart:
    spec:
      chart: redis
      version: '18.x'
      sourceRef:
        kind: HelmRepository
        name: bitnami
        namespace: flux-system
  values:
    architecture: standalone
    auth:
      enabled: false

CLI Commands

# Check Flux status
flux check

# List sources
flux get sources git
flux get sources helm

# List kustomizations
flux get kustomizations

# List Helm releases
flux get helmreleases

# Force sync
flux reconcile kustomization my-app
flux reconcile source git my-app

# Suspend/resume
flux suspend kustomization my-app
flux resume kustomization my-app

# View events
flux events

# Export manifests
flux export kustomization my-app

Image Automation

# Watch for new images
apiVersion: image.toolkit.fluxcd.io/v1beta2
kind: ImageRepository
metadata:
  name: my-app
spec:
  image: ghcr.io/myorg/my-app
  interval: 5m

---
# Auto-update policy
apiVersion: image.toolkit.fluxcd.io/v1beta2
kind: ImagePolicy
metadata:
  name: my-app
spec:
  imageRepositoryRef:
    name: my-app
  policy:
    semver:
      range: '>=1.0.0'

Flux vs Argo CD

	Flux	Argo CD
Architecture	In-cluster controllers	Separate server
UI	CLI + Weave GitOps	Built-in web UI
CNCF	Graduated	Graduated
Multi-tenancy	Native	Via projects
Image updates	Built-in	Separate tool

Resources

Need GitOps or K8s tools? Check my Apify actors or email spinov001@gmail.com.

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