unraid-docker-manager/.planning/phases/03-container-actions/03-04-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
03-container-actions	04	api	docker-api container-update telegram n8n image-pull container-recreation	phase provides 03-01-basic-actions Container lifecycle API patterns, fuzzy matching, action routing structure	Container update command (pull new image + recreate) Image digest comparison for change detection Silent no-update behavior Container config preservation during recreation	04-logs 05-polish	added patterns Image pull via POST /images/create?fromImage=X Image digest comparison for update detection Container config extraction from inspect endpoint NetworkingConfig preservation from NetworkSettings	created modified n8n-workflow.json	Silent when no update available - only notify on actual image change Single container match only for update - no batch updates Version detection from OCI labels with ID fallback Preserve Hostname/Domainname removal during container recreation	Multi-step container operations: inspect -> modify -> recreate Image version extraction from org.opencontainers.image.version or version labels Sequential container lifecycle: stop -> remove -> create -> start	8min	2026-01-30

Phase 03 Plan 04: Container Update Action Summary

Container update workflow with image pull, digest comparison, and config-preserving recreation with version change reporting

Performance

• Duration: 8 min
• Started: 2026-01-30T18:24:33Z
• Completed: 2026-01-30T18:33:00Z
• Tasks: 3
• Files modified: 1

Accomplishments

• Update command routing with single-match-only requirement
• Image pull and digest comparison for detecting actual updates
• Container recreation preserving all configuration (Config, HostConfig, Networks)
• Version change display from image labels or ID substring
• Silent behavior when image already up-to-date

Task Commits

All three tasks were implemented together (continuation of interrupted session):

1. Tasks 1-3: Complete update workflow - 04321c1 (feat)
   • Update command routing and container matching
   • Image pull and change detection
   • Container recreation workflow

Files Created/Modified

• n8n-workflow.json - Extended with 29 new nodes for update flow:
  • Parse Update Command, Docker List for Update, Match Update Container
  • Check Update Match Count, Handle Update Multiple, Send Update Error/No Match/Multiple
  • Build Inspect Command, Inspect Container, Parse Container Config
  • Build Pull Command, Pull Image, Build Image Inspect, Inspect New Image
  • Compare Digests, Check If Update Needed
  • Build Stop Command, Stop Container, Verify Stop Build Remove
  • Remove Container, Build Create Body, Build Create Command
  • Create Container, Parse Create Response
  • Build Start Command, Start New Container
  • Format Update Result, Send Update Result

Decisions Made

• Silent on no-update: When image digest hasn't changed, send no message (per CONTEXT.md)
• Single match only: Update command requires exact container name; multiple matches show disambiguation message
• Version detection hierarchy: Check org.opencontainers.image.version label, then version label, then use image ID substring
• NetworkingConfig preservation: Extract from NetworkSettings.Networks with IPAMConfig, Links, and Aliases

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

• Session was interrupted during initial execution (rate limit)
• Nodes were created but connections were missing
• Connections were added to complete the workflow wiring
• All work committed as single comprehensive commit

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• All container actions complete (start, stop, restart, update)
• Phase 03 fully complete
• Ready for Phase 04: Logs & Intelligence

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Phase: 03-container-actions Completed: 2026-01-30