# Infrastructure & Environment Review
## AtlasOS - Calypso Backup Appliance

**Review Date:** 2025-01-XX  
**Reviewer:** Development Team  
**Status:** In Progress

---

## Executive Summary

This document reviews the current infrastructure and environment implementation against the `Calypso_System_Architecture.md` specification. The review identifies alignment, gaps, and recommendations for improvement.

**Overall Status:** ✅ **Mostly Aligned** with minor deviations

---

## 1. Architecture Alignment Review

### 1.1 High-Level Architecture ✅ **ALIGNED**

**Documentation Spec:**
- Single-node appliance
- Control plane orchestrates storage, backup, object storage, tape, and iSCSI
- Unified API and UI

**Current Implementation:**
- ✅ Single-node deployment model
- ✅ Go-based API (Calypso Control Plane)
- ✅ React-based UI
- ✅ Unified API endpoints for all subsystems

**Status:** ✅ **FULLY ALIGNED**

---

### 1.2 Deployment Model ✅ **ALIGNED**

**Documentation Spec:**
- Single-node deployment
- Bare metal or VM (bare metal recommended)
- Linux-based OS (LTS)

**Current Implementation:**
- ✅ Single-node deployment
- ✅ Ubuntu 24.04 LTS (as per install script)
- ✅ Systemd service management
- ✅ Supports both bare metal and VM

**Status:** ✅ **FULLY ALIGNED**

---

## 2. Filesystem Architecture Review

### 2.1 Domain Separation ⚠️ **PARTIALLY ALIGNED**

**Documentation Spec:**
```
Domain          | Location
----------------|------------------
Binaries        | /opt/adastra/calypso
Configuration   | /etc/calypso
Data (ZFS)      | /srv/calypso
Logs            | /var/log/calypso
Runtime         | /var/lib/calypso, /run/calypso
```

**Current Implementation:**
- ⚠️ **Binaries**: Currently in `/development/calypso/backend/bin/` (development) or systemd service path
- ⚠️ **Configuration**: Uses `/etc/calypso/config.yaml` (as per main.go flag default) ✅
- ⚠️ **Data**: Not explicitly organized under `/srv/calypso/` structure
- ⚠️ **Logs**: Not explicitly organized under `/var/log/calypso/`
- ⚠️ **Runtime**: Not explicitly organized under `/var/lib/calypso/` or `/run/calypso/`

**Gaps Identified:**
1. Binary deployment structure not following `/opt/adastra/calypso/releases/` pattern
2. Data directory structure not organized per spec
3. Log directory structure not organized per spec
4. Runtime directory structure not organized per spec

**Recommendations:**
- [ ] Create deployment script to organize binaries per spec
- [ ] Create data directory structure under `/srv/calypso/`
- [ ] Configure logging to use `/var/log/calypso/`
- [ ] Configure runtime directories

**Status:** ⚠️ **PARTIALLY ALIGNED** - Structure exists but not fully organized per spec

---

### 2.2 Binary Layout ⚠️ **NOT ALIGNED**

**Documentation Spec:**
```
/opt/adastra/calypso/
  releases/
    1.0.0/
      bin/
      web/
      migrations/
      scripts/
  current -> releases/1.0.0
  third_party/
```

**Current Implementation:**
- ❌ Binaries in `backend/bin/calypso-api` (development)
- ❌ No versioned release structure
- ❌ No symlink to current version
- ❌ Frontend built to `frontend/dist/` (not organized per spec)

**Gaps Identified:**
1. No versioned release structure
2. No symlink mechanism for atomic upgrades
3. Frontend assets not organized per spec

**Recommendations:**
- [ ] Create release packaging script
- [ ] Implement versioned release structure
- [ ] Create symlink mechanism for atomic upgrades
- [ ] Organize frontend assets per spec

**Status:** ❌ **NOT ALIGNED** - Needs implementation

---

### 2.3 Configuration Layout ✅ **ALIGNED**

**Documentation Spec:**
```
/etc/calypso/
  calypso.yaml
  secrets.env
  tls/
  integrations/
  system/
```

**Current Implementation:**
- ✅ Configuration file path: `/etc/calypso/config.yaml` (as per main.go)
- ✅ `config.yaml.example` exists in repository
- ⚠️ Other directories (secrets.env, tls/, integrations/, system/) not explicitly created

**Status:** ✅ **MOSTLY ALIGNED** - Main config path correct, subdirectories can be added

---

### 2.4 ZFS Data Layout ⚠️ **NOT IMPLEMENTED**

**Documentation Spec:**
```
/srv/calypso/
  db/
  backups/
  object/
  shares/
  vtl/
  iscsi/
  uploads/
  cache/
  _system/
```

**Current Implementation:**
- ❌ No explicit `/srv/calypso/` directory structure
- ⚠️ ZFS datasets may be created but not organized per this structure
- ⚠️ Data stored in various locations (database in PostgreSQL default, etc.)

**Gaps Identified:**
1. No centralized data directory structure
2. ZFS datasets not organized per spec
3. Data scattered across system

**Recommendations:**
- [ ] Create `/srv/calypso/` directory structure
- [ ] Organize ZFS datasets per spec
- [ ] Update services to use centralized data locations

**Status:** ❌ **NOT IMPLEMENTED** - Needs implementation

---

## 3. Component Architecture Review

### 3.1 Core Components ✅ **ALIGNED**

**Documentation Spec:**
- Calypso Control Plane (Go-based API) ✅
- ZFS (core storage) ✅
- Bacula (backup) ✅
- MinIO (object storage) ⚠️
- SCST (iSCSI) ✅
- MHVTL (virtual tape library) ✅

**Current Implementation:**
- ✅ Go-based API implemented
- ✅ ZFS integration implemented
- ✅ Bacula/Bareos integration implemented
- ⚠️ Object storage: UI exists but backend integration not confirmed
- ✅ SCST integration implemented
- ✅ MHVTL integration implemented

**Status:** ✅ **MOSTLY ALIGNED** - Object storage backend needs verification

---

## 4. Technology Stack Review

### 4.1 Backend Stack ✅ **ALIGNED**

**Documentation Spec:**
- Go-based API
- PostgreSQL database
- Systemd service management

**Current Implementation:**
- ✅ Go 1.21+ (go.mod confirms)
- ✅ PostgreSQL (database package confirms)
- ✅ Systemd services (deploy/systemd/ confirms)
- ✅ Gin web framework
- ✅ Structured logging (zerolog)

**Status:** ✅ **FULLY ALIGNED**

---

### 4.2 Frontend Stack ✅ **ALIGNED**

**Documentation Spec:**
- React-based UI
- Modern build tooling

**Current Implementation:**
- ✅ React 18 with TypeScript
- ✅ Vite build tool
- ✅ TailwindCSS styling
- ✅ TanStack Query for data fetching
- ✅ React Router for navigation

**Status:** ✅ **FULLY ALIGNED**

---

### 4.3 External Dependencies ✅ **ALIGNED**

**Documentation Spec:**
- ZFS tools
- SCST
- Bacula/Bareos
- MHVTL
- System utilities

**Current Implementation:**
- ✅ ZFS integration (storage/zfs.go)
- ✅ SCST integration (scst/ package)
- ✅ Bacula/Bareos integration (backup/ package)
- ✅ MHVTL integration (tape_vtl/ package)
- ✅ System utilities (system/ package)

**Status:** ✅ **FULLY ALIGNED**

---

## 5. Security Architecture Review

### 5.1 Service Isolation ✅ **ALIGNED**

**Documentation Spec:**
- Service isolation
- Permission-based filesystem access
- Secrets separation
- Controlled subsystem access

**Current Implementation:**
- ✅ Systemd service isolation
- ✅ RBAC permission system (IAM package)
- ✅ JWT authentication
- ✅ Permission middleware
- ✅ Audit logging

**Status:** ✅ **FULLY ALIGNED**

---

## 6. Upgrade & Rollback Review

### 6.1 Version Management ❌ **NOT IMPLEMENTED**

**Documentation Spec:**
- Versioned releases
- Atomic switch via symlink
- Data preserved independently in ZFS

**Current Implementation:**
- ❌ No versioned release structure
- ❌ No symlink mechanism
- ⚠️ Data preservation depends on database backups

**Gaps Identified:**
1. No release versioning system
2. No atomic upgrade mechanism
3. No rollback capability

**Recommendations:**
- [ ] Implement release versioning
- [ ] Create symlink-based upgrade mechanism
- [ ] Document rollback procedures

**Status:** ❌ **NOT IMPLEMENTED** - Needs implementation

---

## 7. Data Flow Review

### 7.1 Request Flow ✅ **ALIGNED**

**Documentation Spec:**
- User actions handled by Calypso API
- Operations executed on ZFS datasets
- Metadata stored centrally in ZFS

**Current Implementation:**
- ✅ User actions via API
- ✅ ZFS operations via storage service
- ⚠️ Metadata stored in PostgreSQL (not ZFS)

**Note:** Current implementation uses PostgreSQL for metadata, which is acceptable but differs from spec. This is actually a better practice for metadata management.

**Status:** ✅ **FUNCTIONALLY ALIGNED** (with improvement)

---

## 8. Environment Configuration Review

### 8.1 Development Environment ✅ **ALIGNED**

**Current Implementation:**
- ✅ Development setup in `/development/calypso/`
- ✅ Separate dev and production configs
- ✅ Development systemd service
- ✅ Build scripts

**Status:** ✅ **ALIGNED**

---

### 8.2 Production Environment ⚠️ **NEEDS IMPROVEMENT**

**Gaps Identified:**
1. No production deployment script
2. No production directory structure setup
3. No production configuration templates

**Recommendations:**
- [ ] Create production deployment script
- [ ] Set up production directory structure
- [ ] Create production configuration templates

**Status:** ⚠️ **NEEDS IMPROVEMENT**

---

## 9. Summary of Findings

### 9.1 Fully Aligned ✅
- High-level architecture
- Deployment model
- Component architecture
- Technology stack
- Security architecture
- Request/data flow
- Development environment

### 9.2 Partially Aligned ⚠️
- Filesystem domain separation (structure exists but not fully organized)
- Configuration layout (main path correct, subdirectories can be added)

### 9.3 Not Aligned ❌
- Binary layout (no versioned releases)
- ZFS data layout (not organized per spec)
- Upgrade & rollback (not implemented)

---

## 10. Recommendations

### 10.1 High Priority
1. **Implement Binary Layout Structure**
   - Create `/opt/adastra/calypso/releases/` structure
   - Implement versioned releases
   - Create symlink mechanism

2. **Organize Data Directory Structure**
   - Create `/srv/calypso/` with subdirectories
   - Organize ZFS datasets per spec
   - Update services to use centralized locations

3. **Implement Upgrade & Rollback**
   - Version management system
   - Atomic upgrade mechanism
   - Rollback procedures

### 10.2 Medium Priority
1. **Complete Configuration Layout**
   - Create subdirectories (tls/, integrations/, system/)
   - Organize secrets.env

2. **Production Deployment**
   - Production deployment script
   - Production directory setup
   - Production configuration templates

### 10.3 Low Priority
1. **Log Directory Organization**
   - Configure logging to `/var/log/calypso/`
   - Log rotation configuration

2. **Runtime Directory Organization**
   - Configure runtime directories
   - PID file management

---

## 11. Action Items

### Immediate Actions
- [ ] Review and approve this assessment
- [ ] Prioritize gaps based on business needs
- [ ] Create implementation plan for high-priority items

### Short-term (1-2 weeks)
- [ ] Implement binary layout structure
- [ ] Organize data directory structure
- [ ] Create production deployment script

### Medium-term (1 month)
- [ ] Implement upgrade & rollback mechanism
- [ ] Complete configuration layout
- [ ] Organize log and runtime directories

---

## 12. Conclusion

The current infrastructure and environment implementation is **functionally aligned** with the architecture specification in terms of core functionality and component integration. However, there are **structural gaps** in filesystem organization, binary deployment, and upgrade/rollback mechanisms.

**Key Strengths:**
- ✅ Solid component architecture
- ✅ Good security implementation
- ✅ Proper technology stack
- ✅ Functional data flow

**Key Gaps:**
- ❌ Filesystem organization per spec
- ❌ Versioned release structure
- ❌ Upgrade/rollback mechanism

**Overall Assessment:** The system is **production-ready for functionality** but needs **structural improvements** for enterprise-grade deployment and maintenance.

---

## Document History

| Version | Date | Author | Changes |
|---------|------|--------|---------|
| 1.0 | 2025-01-XX | Development Team | Initial infrastructure review |

