Storage Classes and Dynamic Provisioning
Let Kubernetes create storage on demand with StorageClasses, so PersistentVolumeClaims are fulfilled automatically without manual PersistentVolumes.
Storage Classes and Dynamic Provisioning is a free Docker & Kubernetes for Developers lesson on CoddyKit — lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Docker & Kubernetes for Developers learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
The Static Provisioning Pain
With static provisioning an admin must pre-create a PersistentVolume for every claim. That does not scale and wastes capacity when claims do not match exactly.
Enter Dynamic Provisioning
A StorageClass describes a kind of storage and a provisioner. When a PVC requests that class, Kubernetes creates a matching PersistentVolume automatically.
Anatomy of a StorageClass
Key fields are the provisioner, backend-specific parameters, and policies like reclaimPolicy and volumeBindingMode.
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: fast
provisioner: kubernetes.io/aws-ebs
parameters:
type: gp3
reclaimPolicy: Delete
volumeBindingMode: WaitForFirstConsumerClaiming Dynamic Storage
A PVC just names the StorageClass; no PV needs to exist beforehand.
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: data
spec:
accessModes: [ReadWriteOnce]
storageClassName: fast
resources:
requests:
storage: 20GiThe Default StorageClass
A cluster can mark one StorageClass as default. PVCs that omit storageClassName then use it automatically.
kubectl get storageclassreclaimPolicy Explained
Delete removes the underlying disk when the PVC is deleted; Retain keeps it so you can recover data manually.
volumeBindingMode
WaitForFirstConsumer delays creating the volume until a Pod is scheduled, so the disk lands in the same zone as the Pod, avoiding cross-zone attach failures.
Expanding a Volume
If allowVolumeExpansion: true, you can grow a PVC by editing its requested size.
allowVolumeExpansion: trueMultiple Tiers
Offer several classes, such as fast SSD and cheap HDD, and let teams pick the right cost/performance tradeoff per workload.
CSI Drivers
Modern provisioners use the Container Storage Interface (CSI), a standard plugin model so any storage vendor can integrate without changing Kubernetes core.
Verifying Provisioning
After creating the PVC, watch it become Bound and see the auto-created PV.
kubectl get pvc data
kubectl get pvQuick Check
Test what you have learned.
Recap
You learned how StorageClasses enable dynamic provisioning, the meaning of reclaimPolicy and volumeBindingMode, volume expansion, CSI drivers, and how PVCs bind to auto-created PVs.
Frequently asked questions
Is the “Storage Classes and Dynamic Provisioning” lesson free?
Yes — the full text of “Storage Classes and Dynamic Provisioning” is free to read here on the web, and the Docker & Kubernetes for Developers course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Docker & Kubernetes for Developers course, upgrade to CoddyKit PRO.
What will I learn in “Storage Classes and Dynamic Provisioning”?
Let Kubernetes create storage on demand with StorageClasses, so PersistentVolumeClaims are fulfilled automatically without manual PersistentVolumes. You practise Docker & Kubernetes for Developers with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Docker & Kubernetes for Developers?
No prior experience is required. Docker & Kubernetes for Developers on CoddyKit is structured for beginners through advanced learners; this is — lesson 4 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Storage Classes and Dynamic Provisioning” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Docker & Kubernetes for Developers lesson?
Yes. Every Docker & Kubernetes for Developers lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Persistent Volumes & Persistent Volume Claims
- Managing Stateful Applications with StatefulSets
- ConfigMaps & Secrets for Configuration
- Storage Classes and Dynamic Provisioning