Enhanced MongoDB Atlas Backup Configuration with Multi-Tier Scheduling

[universe-ops]

Summary

Implemented comprehensive backup configuration enhancements for MongoDB Atlas resources, enabling sophisticated enterprise-grade backup strategies while maintaining Simple Container's philosophy of intuitive configuration.

Changes Made

🔧 Advanced Multi-Tier Backup Schedules

• Added support for complex backup policies with multiple retention tiers
• Enables the requested enterprise backup strategy:
  • Hourly snapshots: Every 1 hour (retained 2 days)
  • Daily snapshots: Every day (retained 35 days)
  • Weekly snapshots: Every week (retained 8 weeks)
  • Monthly snapshots: 1st of month (retained 6 months)
• Point-in-Time Recovery configuration with continuous oplog streaming

📝 Intuitive Field Names

• Simplified configuration syntax for better clarity:
  • frequencyInterval → every (e.g., every: 1)
  • retentionValue → retainFor (e.g., retainFor: 35)
  • retentionUnit → unit (optional with smart defaults)

🧠 Smart Unit Inference

• Automatic unit defaults based on backup type context:
  • Hourly/Daily backups: Default to "days"
  • Weekly backups: Default to "weeks"
  • Monthly backups: Default to "months"
• Users can override with explicit unit field if needed

🔒 Security Documentation

• Researched and documented MongoDB Atlas backup encryption
• Confirmed Atlas encrypts all backups automatically by default
• Added security information to user documentation

Configuration Examples

Before (Basic):

backup:
  every: 4h
  retention: 24h

After (Advanced):

backup:
  advanced:
    hourly:
      every: 1
      retainFor: 2
    daily:
      every: 1  
      retainFor: 35
    weekly:
      every: 1
      retainFor: 8
    monthly:
      every: 1
      retainFor: 6
    pointInTimeRecovery:
      enabled: true
      oplogSizeGB: 2.0

Technical Implementation

Files Modified:

• pkg/clouds/mongodb/mongodb.go - Enhanced type definitions
• pkg/clouds/pulumi/mongodb/cluster.go - Multi-tier backup logic with helper functions
• docs/schemas/mongodb/atlasconfig.json - Updated JSON schema validation
• docs/docs/reference/supported-resources.md - Comprehensive documentation and examples

Backwards Compatibility: ✅

• Existing simple backup configurations continue to work unchanged
• Enhanced validation ensures either basic OR advanced configuration (not both)

Quality Assurance: ✅

• All builds passing (welder run fmt clean)
• Comprehensive JSON schema validation
• Smart defaults eliminate configuration complexity
• Provider compatibility verified

Benefits

• Enterprise-ready: Supports complex multi-tier backup strategies
• User-friendly: Intuitive field names (every, retainFor)
• Automated: Smart defaults reduce configuration overhead
• Secure: Automatic backup encryption documented
• Flexible: Can mix different backup tiers as needed
• Compatible: Maintains full backwards compatibility

This enhancement transforms MongoDB Atlas backup configuration from basic single-tier schedules into a sophisticated, enterprise-grade backup system while preserving Simple Container's ease-of-use principles.