What is Flux CD?

Question

What is Flux CD?

Accepted Answer

**Flux CD** — A GitOps operator for Kubernetes that automatically synchronizes the cluster with Git.

**Flux v2 consists of:**
1. **Source Controller** — fetches configuration from Git/Helm repos.
2. **Kustomize Controller** — applies Kustomize manifests.
3. **Helm Controller** — manages Helm releases.
4. **Notification Controller** — notifications.

**Bootstrap:**
```bash
flux bootstrap github \
  --owner=my-org \
  --repository=fleet-infra \
  --branch=main \
  --path=clusters/production \
  --personal
```

**GitRepository:**
```yaml
apiVersion: source.toolkit.fluxcd.io/v1
kind: GitRepository
metadata:
  name: myapp
  namespace: flux-system
spec:
  interval: 1m
  url: https://github.com/org/k8s-manifests
  ref:
    branch: main
```

**Kustomization:**
```yaml
apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: myapp
spec:
  interval: 5m
  path: ./overlays/production
  sourceRef:
    kind: GitRepository
    name: myapp
  prune: true
  healthChecks:
    - apiVersion: apps/v1
      kind: Deployment
      name: myapp
      namespace: production
```

**Flux vs ArgoCD:** Flux is lighter, built into K8s. ArgoCD has a UI, more features out of the box.

DevOps: What is Flux CD?

What is Flux CD?

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DevOps: What is Flux CD?

What is Flux CD?

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