I lost half a day to an n8n workflow that was "working." It never ran.

说明与用途

一个活跃性检查脚本检测 n8n 工作流被取消发布或缺失，并在状态变化时仅发送一次电子邮件，避免警报噪音。

问题

A scheduled n8n workflow stopped running silently after being unpublished, causing missed executions without any error alerts.

结果

The liveness check script reliably detects when a workflow is unpublished or missing, sending a single email on state change and avoiding alert fatigue.

工作流

• 1. Deploy n8n 2.43.6 with PostgreSQL 16 on EC2. 2. Import and publish a one‑minute scheduled workflow. 3. Unpublish the workflow to simulate a silent failure. 4. Run a Python script every 15 minutes that: a. GET /workflows to verify existence and active flag. b. GET /executions?workflowId=<id>&limit=1 to check last run. c. GET /executions?workflowId=<id>&status=success&limit=1 to confirm recent success. 5. Compare current state with previous state; if changed, email notification. 6. Re‑publish the workflow and observe the script detect the change and send a recovery email.

证据

I did not want to take this on faith, so I ran it.

来源

Zero. Two and a half minutes, at least two scheduled runs missed, and the execution count did not move by one.

来源

A separate scheduled workflow, every 15 minutes, reads the n8n public API and answers four questions for each workflow on a watch list.

来源

Only email on change.

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