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
-
Storage Class Selection
- Use appropriate storage class based on workload requirements
- Consider access modes needed by applications
- Account for performance requirements
-
Resource Management
- Set appropriate storage quotas
- Monitor storage usage
- Plan for capacity expansion
-
Data Protection
- Regular backups
- Snapshot scheduling
- Replication where needed
-
Performance Optimization
- Use local storage for performance-critical workloads
- Implement caching strategies
- Monitor I/O patterns