Rook Has a Free API — Cloud-Native Storage for Kubernetes

#kubernetes #storage #devops #cloudnative

Rook: Turn Your Disks Into Cloud Storage on Kubernetes

Rook turns distributed storage systems into self-managing Kubernetes services. Ceph, NFS, Cassandra — managed by Kubernetes operators. No storage admin needed.

Why Rook

Self-healing storage on Kubernetes
Ceph integration (block, file, object storage)
No external storage infrastructure needed
Automatic rebalancing and recovery
Production-proven at scale

The Free API (CRDs)

# Create a Ceph cluster
apiVersion: ceph.rook.io/v1
kind: CephCluster
metadata:
  name: rook-ceph
  namespace: rook-ceph
spec:
  cephVersion:
    image: quay.io/ceph/ceph:v18
  dataDirHostPath: /var/lib/rook
  mon:
    count: 3
  dashboard:
    enabled: true
  storage:
    useAllNodes: true
    useAllDevices: true
---
# Block storage (like EBS)
apiVersion: ceph.rook.io/v1
kind: CephBlockPool
metadata:
  name: replicapool
  namespace: rook-ceph
spec:
  replicated:
    size: 3
---
# StorageClass for PVCs
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: rook-ceph-block
provisioner: rook-ceph.rbd.csi.ceph.com
parameters:
  pool: replicapool
  clusterID: rook-ceph
reclaimPolicy: Delete

# Check cluster health
kubectl -n rook-ceph get cephcluster

# Ceph status
kubectl -n rook-ceph exec deploy/rook-ceph-tools -- ceph status

# OSD status
kubectl -n rook-ceph exec deploy/rook-ceph-tools -- ceph osd tree

Storage Types

Type	CRD	Use Case
Block (RBD)	CephBlockPool	Databases, stateful apps
Filesystem (CephFS)	CephFilesystem	Shared file access
Object (S3)	CephObjectStore	S3-compatible storage

Real-World Use Case

A company ran stateful databases on Kubernetes but depended on expensive SAN storage. Rook-Ceph on local NVMe drives: 3x better IOPS, self-healing replication, S3-compatible object store for backups. Storage cost dropped 70%.

Quick Start

kubectl apply -f https://raw.githubusercontent.com/rook/rook/release-1.14/deploy/examples/crds.yaml
kubectl apply -f https://raw.githubusercontent.com/rook/rook/release-1.14/deploy/examples/operator.yaml
kubectl apply -f https://raw.githubusercontent.com/rook/rook/release-1.14/deploy/examples/cluster.yaml

Resources

Need storage monitoring data? Check out my tools on Apify or email spinov001@gmail.com for custom solutions.

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