unraid-docker-manager/.planning/phases/04-logs/04-01-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	duration	completed
04-logs-intelligence	01	logs	docker-logs telegram-bot n8n log-streaming	phase provides 02-docker-integration Docker API integration and container matching patterns phase provides 03-container-actions Action command routing and fuzzy container matching	Container log retrieval via Telegram commands Configurable line count (default 50, max 1000) Binary stream decoder for Docker logs API Formatted log output with monospace display	04-02-claude-analysis	added patterns Docker logs API multiplexed stream decoding Telegram message truncation for long content	created modified n8n-workflow.json	Use Docker logs API with tail parameter for line-limited retrieval Strip 8-byte binary headers from Docker multiplexed stream Truncate at 3800 chars to stay within Telegram 4096 limit Default to 50 lines when not specified, cap at 1000 max	Binary stream decoding: check charCodeAt(0) <= 2 for header presence Log formatting: <pre> tags for monospace, HTML parse mode	3min	2026-01-30

Phase 04 Plan 01: Container Log Retrieval Summary

Container log retrieval via Telegram with Docker API binary stream decoding and configurable line limits

Performance

• Duration: 3 min
• Started: 2026-01-31T02:40:38Z
• Completed: 2026-01-31T02:43:37Z
• Tasks: 3
• Files modified: 1

Accomplishments

• Users can request logs for any container by name via Telegram
• Configurable line count (default 50, max 1000 lines)
• Docker logs API binary stream format properly decoded
• Logs displayed in readable monospace format with truncation for Telegram limits

Task Commits

Implementation was atomic - all tasks completed in single commit:

1. Tasks 1-3: Complete logs implementation - 93c40fe (feat)
   • Task 1: Logs command routing
   • Task 2: Docker logs API integration
   • Task 3: Binary stream format handling

Note: All three tasks were interdependent and completed together in a single atomic commit since they form a cohesive feature implementation.

Files Created/Modified

• n8n-workflow.json - Added 11 new nodes for complete logs workflow:
  • Parse Logs Command: Extract container name and line count from user message
  • Docker List for Logs: Fetch containers for matching
  • Match Logs Container: Fuzzy match container name
  • Check Logs Match Count: Route based on match results
  • Build Logs Command: Construct Docker API curl with tail parameter
  • Execute Logs: Call Docker logs API
  • Format Logs: Decode binary stream, truncate, add monospace formatting
  • Send Logs Response: Reply to user via Telegram
  • Error handlers: No match, multiple matches, Docker errors

Decisions Made

1. Docker logs API with tail parameter

• Rationale: More efficient than fetching all logs and filtering in code
• Implementation: http://localhost/v1.47/containers/{id}/logs?stdout=1&stderr=1&tail={lines}&timestamps=1

2. Binary stream header detection via charCodeAt(0)

• Rationale: Docker multiplexed stream uses byte 0 values 1 (stdout) or 2 (stderr)
• Implementation: Check if charCodeAt(0) <= 2 and length > 8, then strip first 8 bytes
• Robustness: Works even if some lines lack headers (mixed format tolerance)

3. Default 50 lines, cap at 1000

• Rationale: Balance between useful context and Telegram message limits
• Safety: 1000 line cap prevents excessive API calls and message truncation

4. Truncate at 3800 chars

• Rationale: Telegram limit is 4096, leave room for header and formatting tags
• UX: Add "... (truncated)" indicator when limit hit

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None - Docker logs API worked as expected, binary stream format handled correctly.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

Ready for Phase 04 Plan 02 (Claude log analysis):

• Log retrieval working and tested
• Format suitable for Claude API input
• Error handling in place for edge cases

Logs are now available programmatically for Claude to analyze in next plan.

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Phase: 04-logs-intelligence Completed: 2026-01-30