111 lines
4.8 KiB
Markdown
111 lines
4.8 KiB
Markdown
# 2025-10-12 (Day 2) - Docker Scanner Implemented
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**Time Started**: ~20:45 UTC
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**Time Completed**: ~22:15 UTC
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**Goals**: Implement real Docker Registry API integration to fix stubbed Docker scanner
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## Progress Summary
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✅ **Docker Registry Client (NEW)**
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- Complete Docker Registry HTTP API v2 client implementation
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- Docker Hub token authentication flow (anonymous pulls)
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- Manifest fetching with proper headers
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- Digest extraction from Docker-Content-Digest header + manifest fallback
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- 5-minute response caching to respect rate limits
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- Support for Docker Hub (registry-1.docker.io) and custom registries
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- Graceful error handling for rate limiting (429) and auth failures
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✅ **Docker Scanner (FIXED)**
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- Replaced stub `checkForUpdate()` with real registry queries
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- Digest-based comparison (sha256 hashes) between local and remote images
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- Works for ALL tags (latest, stable, version numbers, etc.)
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- Proper metadata in update reports (local digest, remote digest)
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- Error handling for private/local images (no false positives)
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- Successfully tested with real images: postgres, selenium, farmos, redis
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✅ **Testing**
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- Created test harness (`test_docker_scanner.go`)
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- Tested against real Docker Hub images
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- Verified digest comparison works correctly
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- Confirmed caching prevents rate limit issues
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- All 6 test images correctly identified as needing updates
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## What Works Now (Tested)
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- Docker Hub public image checking ✅
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- Digest-based update detection ✅
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- Token authentication with Docker Hub ✅
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- Rate limit awareness via caching ✅
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- Error handling for missing/private images ✅
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## What's Still Stubbed/Incomplete
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- No actual update installation (just discovery and approval)
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- No CVE enrichment from Ubuntu Security Advisories
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- No web dashboard yet
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- Private registry authentication (basic auth, custom tokens)
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- No Windows agent
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## Technical Implementation Details
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- New file: `aggregator-agent/internal/scanner/registry.go` (253 lines)
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- Updated: `aggregator-agent/internal/scanner/docker.go`
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- Docker Registry API v2 endpoints used:
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- `https://auth.docker.io/token` (authentication)
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- `https://registry-1.docker.io/v2/{repo}/manifests/{tag}` (manifest)
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- Cache TTL: 5 minutes (configurable)
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- Handles image name parsing: `nginx` → `library/nginx`, `user/image` → `user/image`, `gcr.io/proj/img` → custom registry
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## Known Limitations
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- Only supports Docker Hub authentication (anonymous pull tokens)
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- Custom/private registries need authentication implementation (TODO)
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- No support for multi-arch manifests yet (uses config digest)
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- Cache is in-memory only (lost on agent restart)
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## Code Stats
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- +253 lines (registry.go)
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- ~50 lines modified (docker.go)
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- Total Docker scanner: ~400 lines
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- 2 working scanners (both production-ready now!)
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## Blockers
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None
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## Next Session Priorities (Updated Post-Session 3)
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1. ~~Fix Docker scanner~~ ✅ DONE! (Session 2)
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2. ~~**Add local agent CLI features**~~ ✅ DONE! (Session 3)
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3. **Build React web dashboard** (visualize agents + updates)
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- MUST support hierarchical views for Proxmox integration
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4. **Rate limiting & security** (critical gap vs PatchMon)
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5. **Implement update installation** (APT packages first)
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6. **Deployment improvements** (Docker, one-line installer, systemd)
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7. **YUM/DNF support** (expand platform coverage)
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8. **Proxmox Integration** ⭐⭐⭐ (KILLER FEATURE - Session 9)
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- Auto-discover LXC containers
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- Hierarchical management: Proxmox → LXC → Docker
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- **User has 2 Proxmox clusters with many LXCs**
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- See PROXMOX_INTEGRATION_SPEC.md for full specification
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## Notes
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- Docker scanner is now production-ready for Docker Hub images
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- Rate limiting is handled via caching (5min TTL)
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- Digest comparison is more reliable than tag-based checks
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- Works for all tag types (latest, stable, v1.2.3, etc.)
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- Private/local images gracefully fail without false positives
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- **Context usage verified** - All functions properly use `context.Context`
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- **Technical debt tracked** in TECHNICAL_DEBT.md (cache cleanup, private registry auth, etc.)
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- **Competitor discovered**: PatchMon (similar architecture, need to research for Session 3)
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- **GUI preference noted**: React Native desktop app preferred over TUI for cross-platform GUI
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---
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## Resources & References
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### Technical Documentation
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- **PostgreSQL Docs**: https://www.postgresql.org/docs/16/
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- **Gin Framework**: https://gin-gonic.com/docs/
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- **Ubuntu Security Advisories**: https://ubuntu.com/security/notices
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- **Docker Registry API v2**: https://distribution.github.io/distribution/spec/api/
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- **Docker Hub Authentication**: https://docs.docker.com/docker-hub/api/latest/
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- **JWT Standard**: https://jwt.io/
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### Competitive Landscape
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- **PatchMon**: https://github.com/PatchMon/PatchMon (direct competitor, similar architecture)
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- See COMPETITIVE_ANALYSIS.md for detailed comparison |