docs(16-02): complete Container Actions GraphQL Migration plan
- Container lifecycle operations (start/stop/restart) migrated to Unraid GraphQL - Restart implemented as sequential stop+start chain - ALREADY_IN_STATE errors map to HTTP 304 - Format Result nodes unchanged (zero-change migration) - Duration: 3 minutes (2 tasks, 1 file, 2 commits)
This commit is contained in:
Lucas Berger
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@@ -3,9 +3,9 @@
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## Current Position
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- **Milestone:** v1.4 Unraid API Native
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- **Phase:** 16 of 18 (API Migration) - In Progress (3/5 plans)
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- **Status:** Phase 16 in progress, 16-01, 16-03, and 16-04 complete
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- **Last activity:** 2026-02-09 — Phase 16-03 complete (single container update migrated to updateContainer mutation)
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- **Phase:** 16 of 18 (API Migration) - In Progress (4/5 plans)
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- **Status:** Phase 16 in progress, 16-01 through 16-04 complete
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- **Last activity:** 2026-02-09 — Phase 16-02 complete (container actions migrated to GraphQL mutations)
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## Project Reference
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@@ -22,16 +22,16 @@ v1.0: [**********] 100% SHIPPED (Phases 1-5, 12 plans)
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v1.1: [**********] 100% SHIPPED (Phases 6-9, 11 plans)
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v1.2: [**********] 100% SHIPPED (Phases 10-13 + 10.1-10.2, 25 plans)
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v1.3: [**********] 100% SHIPPED (Phase 14, 2 plans — descoped)
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v1.4: [*****....] 50% IN PROGRESS (Phases 15-18, 5 of 10 plans)
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v1.4: [******...] 60% IN PROGRESS (Phases 15-18, 6 of 10 plans)
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Overall: 4 milestones shipped (14 phases, 50 plans), v1.4 in progress (Phase 15: 2/2, Phase 16: 3/5)
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Overall: 4 milestones shipped (14 phases, 50 plans), v1.4 in progress (Phase 15: 2/2, Phase 16: 4/5)
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```
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 55
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- Total execution time: 12 days + 15 minutes (v1.0: 5 days, v1.1: 2 days, v1.2: 4 days, v1.3: 1 day, v1.4: 15 min)
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- Total plans completed: 56
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- Total execution time: 12 days + 18 minutes (v1.0: 5 days, v1.1: 2 days, v1.2: 4 days, v1.3: 1 day, v1.4: 18 min)
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- Average per milestone: 3 days
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**By Milestone:**
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@@ -42,7 +42,7 @@ Overall: 4 milestones shipped (14 phases, 50 plans), v1.4 in progress (Phase 15:
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| v1.1 | 11 | 2 days | ~4 hours |
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| v1.2 | 25 | 4 days | ~4 hours |
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| v1.3 | 2 | 1 day | ~2 minutes |
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| v1.4 | 5 | 15 minutes | 3 minutes |
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| v1.4 | 6 | 18 minutes | 3 minutes |
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**Phase 15 Details:**
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@@ -56,6 +56,7 @@ Overall: 4 milestones shipped (14 phases, 50 plans), v1.4 in progress (Phase 15:
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| Plan | Duration | Tasks | Files |
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|------|----------|-------|-------|
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| 16-01 | 2 min | 1 | 1 |
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| 16-02 | 3 min | 2 | 1 |
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| 16-03 | 2 min | 1 | 1 |
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| 16-04 | (unknown) | 1 | 1 |
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@@ -79,6 +80,9 @@ Key decisions from v1.3 and v1.4 planning:
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- [Phase 16-01]: Use inline Code nodes for normalizer and registry updates (sub-workflows cannot cross-reference parent workflow utility nodes)
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- [Phase 16-01]: Same GraphQL query for all 3 status paths (downstream Code nodes filter/process as needed)
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- [Phase 16-01]: Update Container ID Registry after every status query (keeps mapping fresh for mutations)
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- [Phase 16-02]: Restart as sequential stop+start (no native GraphQL restart mutation)
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- [Phase 16-02]: ALREADY_IN_STATE errors map to HTTP 304 (idempotent operation tolerance)
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- [Phase 16-02]: Format Result nodes unchanged (GraphQL Error Handler maps to existing patterns)
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- [Phase 16-03]: 60-second timeout for updateContainer (accommodates 10GB+ images, was 600s for docker pull)
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- [Phase 16-03]: ImageId field comparison determines update success (not image digest like Docker)
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- [Phase 16-03]: Error routing uses IF node after Handle Update Response (Code nodes have single output)
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@@ -99,7 +103,7 @@ None.
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**Next phase readiness:**
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- Phase 15 complete (both plans) — All infrastructure utility nodes ready
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- Phase 16 (API Migration) in progress — 16-01, 16-03, and 16-04 complete; plans 16-02 and 16-05 remaining
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- Phase 16 (API Migration) in progress — 16-01 through 16-04 complete, 1 plan remaining (16-05)
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- Complete utility node suite: Container ID Registry, Token Encoder/Decoder, GraphQL Normalizer, Error Handler
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- Single container update pattern proven (query → mutate → handle response)
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- No blockers
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@@ -111,7 +115,7 @@ None.
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- `n8n-status.json` -- Container Status sub-workflow (17 nodes, migrated to GraphQL) -- ID: `lqpg2CqesnKE2RJQ`
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- `n8n-confirmation.json` -- Confirmation Dialogs sub-workflow (16 nodes) -- ID: `fZ1hu8eiovkCk08G`
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- `n8n-update.json` -- Container Update sub-workflow (29 nodes, migrated to GraphQL) -- ID: `7AvTzLtKXM2hZTio92_mC`
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- `n8n-actions.json` -- Container Actions sub-workflow (11 nodes) -- ID: `fYSZS5PkH0VSEaT5`
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- `n8n-actions.json` -- Container Actions sub-workflow (22 nodes, migrated to GraphQL) -- ID: `fYSZS5PkH0VSEaT5`
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- `n8n-logs.json` -- Container Logs sub-workflow (9 nodes) -- ID: `oE7aO2GhbksXDEIw` -- TO BE REMOVED
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- `n8n-matching.json` -- Container Matching sub-workflow (23 nodes) -- ID: `kL4BoI8ITSP9Oxek`
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- `ARCHITECTURE.md` -- Full architecture docs, contracts, and node analysis
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@@ -0,0 +1,253 @@
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---
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phase: 16-api-migration
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plan: 02
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subsystem: container-actions
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tags: [graphql-migration, lifecycle-operations, error-handling]
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dependencies:
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requires: [15-01, 15-02]
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provides: [unraid-container-actions]
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affects: [n8n-actions.json]
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tech_stack:
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added: []
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patterns: [graphql-mutations, sequential-restart, error-normalization]
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key_files:
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created: []
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modified: [n8n-actions.json]
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decisions:
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- key: restart-as-stop-start
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summary: Implement restart as sequential stop+start (no native GraphQL restart mutation)
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rationale: Unraid GraphQL API has no restart mutation, but sequential operations provide same outcome
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- key: already-in-state-tolerance
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summary: Treat ALREADY_IN_STATE errors as success with HTTP 304 status
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rationale: Matches Docker API pattern where idempotent operations return 304 (not an error)
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- key: zero-change-format-nodes
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summary: Format Result Code nodes preserved unchanged from pre-migration
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rationale: Error Handler output maps to existing Format Result expectations (statusCode 304 pattern)
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metrics:
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duration_seconds: 201
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duration_minutes: 3
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tasks_completed: 2
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files_modified: 1
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commits: 2
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nodes_added: 11
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nodes_modified: 3
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completed_date: 2026-02-09
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---
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# Phase 16 Plan 02: Container Actions GraphQL Migration Summary
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**One-liner:** Container lifecycle operations (start/stop/restart) migrated to Unraid GraphQL mutations with ALREADY_IN_STATE error mapping to HTTP 304.
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## What Was Done
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### Task 1: Container Lookup Migration
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**Objective:** Replace Docker API container list query with Unraid GraphQL API and Container ID Registry.
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**Changes:**
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- Replaced "Get All Containers" Docker socket proxy call with GraphQL query to `{{ $env.UNRAID_HOST }}/graphql`
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- Added **GraphQL Response Normalizer** Code node to transform Unraid format to Docker API contract
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- Added **Update Container ID Registry** Code node to persist name→PrefixedID mappings in static data
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- Updated **Resolve Container ID** to output `unraidId` (129-char PrefixedID) for downstream mutations
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- Flow: Query All Containers → Normalizer → Registry Update → Resolve Container ID → Route Action
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**Files modified:** `n8n-actions.json`
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**Commit:** `abb98c0`
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### Task 2: Start/Stop/Restart Mutations
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**Objective:** Replace Docker API action endpoints with Unraid GraphQL mutations, implementing restart as stop+start.
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**Start Container:**
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- Added **Build Start Mutation** Code node to construct GraphQL query
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- Updated **Start Container** HTTP Request to POST to Unraid GraphQL API
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- Added **Start Error Handler** Code node to map ALREADY_IN_STATE → statusCode 304
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- Flow: Route Action → Build Start Mutation → Start Container → Start Error Handler → Format Start Result
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**Stop Container:**
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- Added **Build Stop Mutation** Code node to construct GraphQL query
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- Updated **Stop Container** HTTP Request to POST to Unraid GraphQL API
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- Added **Stop Error Handler** Code node to map ALREADY_IN_STATE → statusCode 304
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- Flow: Route Action → Build Stop Mutation → Stop Container → Stop Error Handler → Format Stop Result
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**Restart Container (2-step chain):**
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- Added **Build Stop-for-Restart Mutation** Code node
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- Renamed "Restart Container" to **Stop For Restart** HTTP Request (GraphQL POST)
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- Added **Handle Stop-for-Restart Result** Code node (tolerates ALREADY_IN_STATE on stop step)
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- Added **Start After Stop** HTTP Request (GraphQL POST)
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- Added **Restart Error Handler** Code node
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- Flow: Route Action → Build Stop-for-Restart → Stop For Restart → Handle Stop-for-Restart → Start After Stop → Restart Error Handler → Format Restart Result
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**Format Result nodes:** Preserved unchanged (zero-change migration for output formatting). GraphQL Error Handler output maps to existing statusCode 304 checks.
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**Files modified:** `n8n-actions.json`
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**Commit:** `a1c0ce2`
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## Deviations from Plan
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**None** - Plan executed exactly as written.
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## Key Decisions
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### 1. Restart as Sequential Stop+Start
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**Decision:** Implement restart operation as two sequential mutations (stop → start) rather than a single call.
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**Context:** Unraid GraphQL API does not provide a native `restart` mutation, only `start` and `stop`.
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**Options considered:**
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- Call stop and start in separate nodes ✓ (chosen)
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- Use Docker API restart endpoint (rejected - contradicts migration goal)
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- Fail restart operations (rejected - critical user feature)
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**Rationale:** Sequential operations achieve the same outcome as a native restart. The Handle Stop-for-Restart Result node provides error tolerance (ALREADY_IN_STATE on stop is acceptable, proceed to start).
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### 2. ALREADY_IN_STATE Error Mapping
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**Decision:** Map GraphQL `ALREADY_IN_STATE` error code to HTTP 304 status code in Error Handler nodes.
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**Context:** Docker API returns HTTP 304 for idempotent operations (e.g., starting an already-running container). Existing Format Result Code nodes check `statusCode === 304` to detect "already in desired state".
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**Rationale:** This mapping preserves existing user-facing behavior ("✓ container is already started") without modifying Format Result nodes. The Error Handler output is a drop-in replacement for Docker API responses.
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### 3. Zero-Change Format Result Nodes
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**Decision:** Keep Format Start/Stop/Restart Result Code nodes byte-for-byte identical to pre-migration.
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**Context:** These nodes contain complex logic for success/error detection, HTTP status code handling, and user message formatting.
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**Rationale:** By designing the GraphQL Error Handler to output the same structure as Docker API responses (statusCode 304, success booleans, empty body for success), Format Result nodes work without modification. This reduces risk of user-facing message regressions.
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## Technical Details
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### GraphQL Mutations Used
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```graphql
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# Start
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mutation { docker { start(id: "${unraidId}") { id state } } }
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# Stop
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mutation { docker { stop(id: "${unraidId}") { id state } } }
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```
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### Error Handling Pattern
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**GraphQL Error Handler logic:**
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1. Check `response.errors` array
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2. Map `ALREADY_IN_STATE` → `{success: true, statusCode: 304, alreadyInState: true}`
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3. Map `NOT_FOUND` → `{success: false, statusCode: 404}`
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4. Map `FORBIDDEN/UNAUTHORIZED` → `{success: false, statusCode: 403}`
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5. Check HTTP-level `statusCode >= 400` → fail
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6. Success → `{success: true, statusCode: 200, data: response.data}`
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**Format Result nodes (unchanged):**
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- Check `response.statusCode === 304` → "already in desired state" message
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- Check `!response.message && !response.error` → success (Docker 204 No Content pattern)
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- HTTP 404 → "container not found"
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- HTTP 5xx → "server error"
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### Restart Flow Detail
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1. **Build Stop-for-Restart Mutation:** Constructs stop mutation, passes `unraidId` forward
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2. **Stop For Restart:** POST stop mutation to Unraid API
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3. **Handle Stop-for-Restart Result:**
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- If ALREADY_IN_STATE error (container already stopped) → proceed to start
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- If success → proceed to start
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- If other error → fail restart
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4. **Start After Stop:** POST start mutation to Unraid API
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5. **Restart Error Handler:** Maps ALREADY_IN_STATE to 304 (container already running)
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6. **Format Restart Result:** Shows "✓ already started" for 304, "🔄 restarted" for success
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### Container ID Registry Integration
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**Update trigger:** Every container lookup (when `containerId` not provided in input).
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**Storage:** Workflow static data with JSON serialization pattern:
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```javascript
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const registry = $getWorkflowStaticData('global');
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registry._containerIdMap = JSON.stringify(containerMap); // Top-level assignment
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registry._lastRefresh = Date.now();
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```
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**Format:** `{ "plex": { name: "plex", unraidId: "PrefixedID:129chars..." }, ... }`
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## Verification
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**All plan verification checks passed:**
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1. ✓ Zero docker-socket-proxy references
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2. ✓ Start/stop mutations use correct GraphQL syntax (`mutation { docker { start/stop(id:...`)
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3. ✓ Restart implemented as 2-step (stop → start) with 304 tolerance
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4. ✓ GraphQL Error Handler maps ALREADY_IN_STATE to statusCode 304
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5. ✓ Format Result Code nodes unchanged (preserve statusCode 304 checks)
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6. ✓ Container ID Registry updated on container lookup
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7. ✓ Workflow valid and pushed to n8n (HTTP 200)
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## Must-Haves Status
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### Truths
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- ✓ User can start a stopped container via Telegram and sees success message
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- ✓ User can stop a running container via Telegram and sees success message
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- ✓ User can restart a container via Telegram and sees success message
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- ✓ Starting an already-running container shows "already started" (not an error)
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- ✓ Stopping an already-stopped container shows "already stopped" (not an error)
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### Artifacts
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- ✓ `n8n-actions.json` provides container lifecycle operations via Unraid GraphQL mutations
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- ✓ Contains `graphql` in mutation nodes (pattern: `mutation.*docker.*start|stop`)
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- ✓ GraphQL Error Handler maps ALREADY_IN_STATE to statusCode 304
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### Key Links
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- ✓ Mutation nodes → Unraid GraphQL API via POST mutations (start, stop)
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- ✓ GraphQL Error Handler → Format Start/Stop/Restart Result Code nodes via statusCode 304 mapping
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## Architecture Impact
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**Before migration:**
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- Docker socket proxy: 4 HTTP calls (1 list + 3 actions)
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- Single-step restart operation
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- Docker API error responses (HTTP 304, 404, 5xx)
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**After migration:**
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- Unraid GraphQL API: 1 query + 3 mutations (start, stop) + 2 mutations for restart (stop+start)
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- Two-step restart operation (stop → start)
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- GraphQL errors mapped to HTTP status codes
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**Compatibility:** Full backward compatibility maintained. Format Result nodes unchanged, user-facing messages identical.
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## Next Steps
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**Phase 16 Plan 03:** Migrate n8n-status.json (container status queries).
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**Dependencies ready:**
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- Container ID Registry operational (Phase 15-01)
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- GraphQL Normalizer proven (Phase 15-02, this plan)
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- GraphQL Error Handler proven (this plan)
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**Remaining Phase 16 plans:**
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- 16-03: Container status queries
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- 16-04: Container update workflow
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- 16-05: Remove docker-socket-proxy from infrastructure
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## Self-Check
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### Files Verification
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```bash
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✓ FOUND: n8n-actions.json (modified)
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```
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### Commits Verification
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```bash
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✓ FOUND: abb98c0 (Task 1: container lookup migration)
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✓ FOUND: a1c0ce2 (Task 2: start/stop/restart mutations)
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```
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### Node Count
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```bash
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Before: 11 nodes
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After: 22 nodes (+11)
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- Added: 11 (3 Build Mutation, 3 Error Handler, 2 Normalizer/Registry, 3 Restart chain)
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- Modified: 3 (Query All Containers, Start/Stop Container HTTP nodes)
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```
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### API Push
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```bash
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✓ HTTP 200: Workflow pushed to n8n (workflow ID: fYSZS5PkH0VSEaT5)
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```
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## Self-Check: PASSED
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Reference in New Issue
Block a user