Longhorn Cloud Native Storage Guide

helm install longhorn longhorn/longhorn \
  --namespace longhorn-system --create-namespace

kubectl port-forward -n longhorn-system svc/longhorn-frontend 8080:80
# Open http://localhost:8080

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres-data
spec:
  storageClassName: longhorn
  accessModes: [ReadWriteOnce]
  resources:
    requests:
      storage: 20Gi

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: longhorn-fast
provisioner: driver.longhorn.io
parameters:
  numberOfReplicas: "2"
  dataLocality: best-effort
  diskSelector: ssd
allowVolumeExpansion: true
reclaimPolicy: Delete

apiVersion: longhorn.io/v1beta2
kind: Snapshot
metadata:
  name: postgres-snap-daily
spec:
  volume: pvc-abc123

apiVersion: longhorn.io/v1beta2
kind: RecurringJob
metadata:
  name: daily-snapshot
  namespace: longhorn-system
spec:
  cron: "0 2 * * *"
  task: snapshot
  retain: 7
  groups:
    - default

# Configure backup target (in Longhorn UI or settings)
# Settings → Backup Target:
#   s3://my-longhorn-backups@eu-west-1/

# Or via Kubernetes secret
apiVersion: v1
kind: Secret
metadata:
  name: longhorn-backup-target
  namespace: longhorn-system
data:
  AWS_ACCESS_KEY_ID: <base64>
  AWS_SECRET_ACCESS_KEY: <base64>

apiVersion: longhorn.io/v1beta2
kind: RecurringJob
metadata:
  name: daily-backup
  namespace: longhorn-system
spec:
  cron: "0 3 * * *"
  task: backup
  retain: 30
  groups:
    - default

# From UI: Backup → Select backup → Restore
# Creates a new PV from the backup

# Edit the PVC
kubectl patch pvc postgres-data -p '{"spec":{"resources":{"requests":{"storage":"50Gi"}}}}'

# ServiceMonitor for Prometheus Operator
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: longhorn
spec:
  selector:
    matchLabels:
      app: longhorn-manager
  endpoints:
    - port: manager