fix: increase memory limit to 1Gi and set NODE_OPTIONS heap size

n8n 2.23+ has higher memory requirements. The previous 512Mi limit
caused OOM crashes (JS heap exhausted at ~248MB).

Changes:
- memory limit: 512Mi -> 1Gi, request: 256Mi -> 512Mi
- NODE_OPTIONS: --max-old-space-size={{ nodeHeapSizeMb }} (default 768MB)
  keeps JS heap at 75% of limit, leaving headroom for native code/buffers
- WEBHOOK_URL -> N8N_WEBHOOK_URL (deprecation warning fix)
- values.yaml: expose nodeHeapSizeMb for tuning

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: n8n
 description: A Helm chart for n8n workflow automation on Kubernetes (ARM/Raspberry Pi ready)
 type: application
-version: "2.36.5"
+version: "2.36.5-a"
 appVersion: "2.36.5"
 keywords:
   - n8n

README.md

@@ -119,12 +119,15 @@ helm install my-n8n cafepieters/n8n \
 
 ### リソース（Raspberry Pi 向けデフォルト）
 
+n8n 2.23 以降はメモリ消費が増加しています。`nodeHeapSizeMb` は `resources.limits.memory` の約 75% に設定してください。
+
 | パラメータ | デフォルト |
 |---|---|
 | `resources.requests.cpu` | `250m` |
-| `resources.requests.memory` | `256Mi` |
+| `resources.requests.memory` | `512Mi` |
 | `resources.limits.cpu` | `1000m` |
-| `resources.limits.memory` | `512Mi` |
+| `resources.limits.memory` | `1Gi` |
+| `nodeHeapSizeMb` | `768` |
 
 ## セキュアCookieの自動設定
 
@@ -237,6 +240,7 @@ helm upgrade my-n8n cafepieters/n8n \
 
 | バージョン | n8n | 変更内容 |
 |---|---|---|
+| 2.36.5-a | 2.36.5 | OOM対応: メモリ制限 1Gi・NODE_OPTIONS ヒープ制限追加・WEBHOOK_URL 非推奨警告修正 |
 | 2.36.5 | 2.36.5 | 自動更新 |
 | 2.35.3 | 2.35.3 | 自動更新 |
 | 2.34.4 | 2.34.4 | 自動更新 |

templates/deployment.yaml

@@ -41,6 +41,8 @@ spec:
           containerPort: 5678
           protocol: TCP
         env:
+        - name: NODE_OPTIONS
+          value: "--max-old-space-size={{ .Values.nodeHeapSizeMb }}"
         - name: N8N_PORT
           value: "5678"
         - name: N8N_PROTOCOL
@@ -48,7 +50,7 @@ spec:
         - name: N8N_HOST
           value: {{ .Values.n8n.host | quote }}
         {{- if .Values.n8n.webhookUrl }}
-        - name: WEBHOOK_URL
+        - name: N8N_WEBHOOK_URL
           value: {{ .Values.n8n.webhookUrl | quote }}
         {{- end }}
         - name: GENERIC_TIMEZONE

values.yaml

@@ -64,13 +64,18 @@ ingress:
   #      - n8n.local
 
 # Resource limits suitable for Raspberry Pi
+# n8n 2.23+ requires more memory. Set nodeHeapSizeMb to ~75% of memory limit.
 resources:
   limits:
     cpu: 1000m
-    memory: 512Mi
+    memory: 1Gi
   requests:
     cpu: 250m
-    memory: 256Mi
+    memory: 512Mi
+
+# Node.js heap size limit (MB). Should be ~75% of resources.limits.memory.
+# 1Gi limit → 768MB heap leaves headroom for native code and buffers.
+nodeHeapSizeMb: 768
 
 autoscaling:
   enabled: false