Storage Architecture

Storage Overview

graph TD
    subgraph Storage Classes
        NFS[NFS Storage Class]
        OpenEBS[OpenEBS Storage Class]
    end

    subgraph Persistent Volumes
        NFS --> NFS_PV[NFS PVs]
        OpenEBS --> Local_PV[Local PVs]
    end

    subgraph Applications
        NFS_PV --> Media[Media Apps]
        NFS_PV --> Backup[Backup Storage]
        Local_PV --> Database[Databases]
        Local_PV --> Cache[Cache Storage]
    end

Storage Classes

NFS Storage Class

  • Used for shared storage across nodes
  • Ideal for media storage and shared configurations
  • Supports ReadWriteMany (RWX) access mode
  • Configuration:
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nfs-csi
provisioner: nfs.csi.k8s.io
parameters:
  server: nfs-server
  share: /export/nfs

OpenEBS Storage Class

  • Local storage for performance-critical applications
  • Used for databases and caching layers
  • Supports ReadWriteOnce (RWO) access mode
  • Configuration:
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: openebs-local
provisioner: openebs.io/local
volumeBindingMode: WaitForFirstConsumer

Storage Considerations

Performance

  • Use OpenEBS local storage for:
    • Databases requiring low latency
    • Cache storage
    • Write-intensive workloads
  • Use NFS storage for:
    • Media files
    • Shared configurations
    • Backup storage
    • Read-intensive workloads

Backup Strategy

graph LR
    Apps[Applications] --> PV[Persistent Volumes]
    PV --> Backup[Backup Jobs]
    Backup --> Remote[Remote Storage]

Volume Snapshots

  • Regular snapshots for data protection
  • Snapshot schedules based on data criticality
  • Retention policies for space management

Best Practices

  1. Storage Class Selection

    • Use appropriate storage class based on workload requirements
    • Consider access modes needed by applications
    • Account for performance requirements
  2. Resource Management

    • Set appropriate storage quotas
    • Monitor storage usage
    • Plan for capacity expansion
  3. Data Protection

    • Regular backups
    • Snapshot scheduling
    • Replication where needed
  4. Performance Optimization

    • Use local storage for performance-critical workloads
    • Implement caching strategies
    • Monitor I/O patterns