Storage-K8S

1. Overview

Storage in Kubernetes provides both persistent and ephemeral storage options for applications.
Storage abstraction in Kubernetes involves resources like Persistent Volumes (PV), Persistent Volume Claims (PVC), and Storage Classes to streamline provisioning and management.

Persistent Volume (PV):
- Cluster storage provisioned by administrators or dynamically via storage classes.
- Functions independently of pod lifecycle with defined capacity and access mode.
Persistent Volume Claim (PVC):
- User-requested storage specifying size and access modes (ReadWriteOnce, ReadOnlyMany, ReadWriteMany).
- Binds to a PV that meets the claim’s specifications.
Storage Classes:
- Define different storage types and characteristics like replication and performance.
- Enable dynamic volume provisioning.
- Applications leverage StorageClass to align volumes with performance requirements.

PVCs abstract storage for users; PVs represent the actual storage resource.
Storage Classes offer templates for dynamically provisioning PVs based on application needs.
Kubernetes provisions a PV automatically upon PVC creation that matches the desired StorageClass.

Data Security: Implement encryption, access controls, and network policies.
Storage Performance: Monitor IOPS, latency, and throughput relative to application demands.
Backup and Recovery: Develop strategies and use tools for data recovery.
Capacity Planning: Evaluate resource utilization and anticipate future needs for optimal storage allocation.

Automate monitoring and alert systems for storage usage and performance metrics.
Update Storage Classes regularly to incorporate new storage technology advancements.
Design storage architecture with scalability and high availability in mind.
checkout CSI, for flexible storage classes
also read up on non-persistent storage options (Ephemeral Volumes)