Non-Functional Requirements¶

Overview¶

This document outlines the non-functional requirements for the RH OVE multi-cluster ecosystem, defining quality attributes and constraints.

Performance Requirements¶

Latency¶

FR-NFR-001: API response time must be < 200ms for 95% of requests
FR-NFR-002: Cross-cluster communication latency must be < 50ms
FR-NFR-003: VM startup time must be < 60 seconds for standard workloads

Throughput¶

FR-NFR-004: System must support deployment of 100+ VMs per hour per cluster
FR-NFR-005: Monitoring system must handle 10,000+ metrics per second
FR-NFR-006: Log aggregation must process 1GB+ of logs per hour

Resource Utilization¶

FR-NFR-007: CPU utilization must not exceed 80% under normal load
FR-NFR-008: Memory utilization must not exceed 85% under normal load
FR-NFR-009: Storage utilization must not exceed 90% capacity

Availability Requirements¶

Uptime¶

FR-NFR-010: Production clusters must achieve 99.9% uptime (< 8.77 hours downtime/year)
FR-NFR-011: Management cluster must achieve 99.95% uptime (< 4.38 hours downtime/year)
FR-NFR-012: Critical services must have < 30 seconds failover time

Disaster Recovery¶

FR-NFR-013: RPO (Recovery Point Objective) must be < 4 hours
FR-NFR-014: RTO (Recovery Time Objective) must be < 8 hours
FR-NFR-015: Cross-region failover must complete within 15 minutes

Scalability Requirements¶

Horizontal Scaling¶

FR-NFR-016: System must support minimum 10 application clusters
FR-NFR-017: Each cluster must support 1000+ pods
FR-NFR-018: System must scale to 50,000+ containers across all clusters

Vertical Scaling¶

FR-NFR-019: Individual VMs must scale up to 64 vCPUs and 512GB RAM
FR-NFR-020: Storage volumes must scale up to 100TB per volume
FR-NFR-021: Network bandwidth must scale to 25Gbps per node

Security Requirements¶

Authentication & Authorization¶

FR-NFR-022: All API access must use multi-factor authentication
FR-NFR-023: RBAC must be enforced across all cluster components
FR-NFR-024: Service accounts must use time-limited tokens

Data Protection¶

FR-NFR-025: All data in transit must be encrypted (TLS 1.3+)
FR-NFR-026: All data at rest must be encrypted (AES-256)
FR-NFR-027: Encryption keys must be rotated every 90 days

Network Security¶

FR-NFR-028: All inter-cluster communication must be encrypted
FR-NFR-029: Network policies must deny by default
FR-NFR-030: Network segmentation must isolate environments

Compliance¶

FR-NFR-031: System must maintain SOC 2 Type II compliance
FR-NFR-032: Audit logs must be retained for 7 years
FR-NFR-033: Security scanning must occur daily

Reliability Requirements¶

Fault Tolerance¶

FR-NFR-034: System must survive single node failures without service interruption
FR-NFR-035: System must survive single AZ failures in multi-AZ deployments
FR-NFR-036: Data must be replicated across minimum 3 nodes

Error Handling¶

FR-NFR-037: All errors must be logged with appropriate severity levels
FR-NFR-038: Transient errors must be retried with exponential backoff
FR-NFR-039: Critical errors must trigger automated alerting

Monitoring & Observability¶

FR-NFR-040: System health must be monitored with 99% coverage
FR-NFR-041: Metrics retention must be minimum 1 year
FR-NFR-042: Distributed tracing must be enabled for all services

Maintainability Requirements¶

Deployment & Updates¶

FR-NFR-043: Zero-downtime deployments must be supported
FR-NFR-044: Rollback capability must be available within 5 minutes
FR-NFR-045: Automated testing must cover 90%+ of functionality

Configuration Management¶

FR-NFR-046: All configuration must be version controlled
FR-NFR-047: Configuration changes must be auditable
FR-NFR-048: Infrastructure as Code must be used for all deployments

Documentation¶

FR-NFR-049: All APIs must have OpenAPI specifications
FR-NFR-050: Runbooks must be available for all operational procedures
FR-NFR-051: Architecture decisions must be documented in ADRs

Usability Requirements¶

User Interface¶

FR-NFR-052: Web UI must be responsive and mobile-friendly
FR-NFR-053: API must follow RESTful design principles
FR-NFR-054: CLI tools must provide comprehensive help documentation

Accessibility¶

FR-NFR-055: Web interfaces must meet WCAG 2.1 AA standards
FR-NFR-056: Multi-language support must be available
FR-NFR-057: High contrast mode must be supported

Capacity Requirements¶

Storage¶

FR-NFR-058: Minimum 100TB usable storage per production cluster
FR-NFR-059: Storage must support 10,000+ IOPS per cluster
FR-NFR-060: Backup storage must retain data for 5 years

Network¶

FR-NFR-061: Minimum 10Gbps connectivity between clusters
FR-NFR-062: Maximum 5ms latency within cluster networks
FR-NFR-063: Network must support jumbo frames (9000 MTU)

Compute¶

FR-NFR-064: Minimum 1000 vCPUs available per production cluster
FR-NFR-065: Minimum 4TB RAM available per production cluster
FR-NFR-066: Support for GPU workloads (minimum 8 GPUs per cluster)

Compliance & Regulatory Requirements¶

Data Governance¶

FR-NFR-067: Data must be classified and labeled appropriately
FR-NFR-068: PII data must be encrypted and access-controlled
FR-NFR-069: Data retention policies must be automatically enforced

Audit & Logging¶

FR-NFR-070: All administrative actions must be logged
FR-NFR-071: Logs must be tamper-proof and timestamped
FR-NFR-072: Compliance reports must be generated automatically

Privacy¶

FR-NFR-073: Right to be forgotten must be supported
FR-NFR-074: Data minimization principles must be enforced
FR-NFR-075: Privacy by design must be implemented