This workflow follows the HTTP Request → Postgres recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "System Health Check",
"nodes": [
{
"parameters": {
"rule": {
"interval": [
{
"field": "cronExpression",
"expression": "*/5 * * * *"
}
]
}
},
"id": "cron-trigger",
"name": "Every 5 Minutes",
"type": "n8n-nodes-base.cron",
"typeVersion": 1,
"position": [
240,
300
]
},
{
"parameters": {
"url": "http://prometheus:9090/api/v1/query",
"options": {
"qs": {
"query": "up"
}
}
},
"id": "check-prometheus",
"name": "Check Prometheus",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.1,
"position": [
460,
200
]
},
{
"parameters": {
"url": "http://redis:6379/ping"
},
"id": "check-redis",
"name": "Check Redis",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.1,
"position": [
460,
300
]
},
{
"parameters": {
"url": "http://postgres:5432"
},
"id": "check-postgres",
"name": "Check PostgreSQL",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.1,
"position": [
460,
400
]
},
{
"parameters": {
"url": "http://mongodb:27017"
},
"id": "check-mongodb",
"name": "Check MongoDB",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.1,
"position": [
460,
500
]
},
{
"parameters": {
"jsCode": "// Aggregate health check results\nconst results = [];\n\n// Process each service check\nfor (const item of $input.all()) {\n const service = item.json.service || 'unknown';\n const status = item.json.status === 200 ? 'healthy' : 'unhealthy';\n const responseTime = item.json.responseTime || 0;\n \n results.push({\n service,\n status,\n responseTime,\n timestamp: new Date().toISOString(),\n healthy: status === 'healthy'\n });\n}\n\n// Calculate overall health\nconst healthyServices = results.filter(r => r.healthy).length;\nconst totalServices = results.length;\nconst overallHealth = healthyServices / totalServices;\n\nreturn {\n overallHealth,\n healthyServices,\n totalServices,\n services: results,\n timestamp: new Date().toISOString()\n};"
},
"id": "aggregate-results",
"name": "Aggregate Results",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
680,
300
]
},
{
"parameters": {
"operation": "insert",
"table": "health_checks",
"columns": "timestamp, service, status, response_time, healthy",
"values": "={{ $json.timestamp }}, {{ $json.service }}, {{ $json.status }}, {{ $json.responseTime }}, {{ $json.healthy }}"
},
"id": "save-health-data",
"name": "Save Health Data",
"type": "n8n-nodes-base.postgres",
"typeVersion": 2.4,
"position": [
900,
300
],
"credentials": {
"postgres": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict"
},
"conditions": [
{
"id": "condition-1",
"leftValue": "={{ $json.overallHealth }}",
"rightValue": 1,
"operator": {
"type": "number",
"operation": "equals"
}
}
],
"combinator": "and"
},
"options": {}
},
"id": "check-overall-health",
"name": "Check Overall Health",
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
1120,
300
]
},
{
"parameters": {
"select": "channel",
"channelId": {
"__rl": true,
"value": "n8n",
"mode": "name"
},
"text": "\u2705 All services are healthy ({{ $json.healthyServices }}/{{ $json.totalServices }})",
"otherOptions": {
"attachments": [
{
"color": "good",
"fields": [
{
"title": "Healthy Services",
"value": "{{ $json.healthyServices }}/{{ $json.totalServices }}",
"short": true
},
{
"title": "Overall Health",
"value": "{{ Math.round($json.overallHealth * 100) }}%",
"short": true
}
]
}
]
}
},
"id": "success-notification",
"name": "Success Notification",
"type": "n8n-nodes-base.slack",
"typeVersion": 2.1,
"position": [
1340,
200
],
"credentials": {
"slackApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"select": "channel",
"channelId": {
"__rl": true,
"value": "n8n",
"mode": "name"
},
"text": "\u26a0\ufe0f System health degraded ({{ $json.healthyServices }}/{{ $json.totalServices }} services healthy)",
"otherOptions": {
"attachments": [
{
"color": "warning",
"fields": [
{
"title": "Healthy Services",
"value": "{{ $json.healthyServices }}/{{ $json.totalServices }}",
"short": true
},
{
"title": "Overall Health",
"value": "{{ Math.round($json.overallHealth * 100) }}%",
"short": true
}
]
}
]
}
},
"id": "warning-notification",
"name": "Warning Notification",
"type": "n8n-nodes-base.slack",
"typeVersion": 2.1,
"position": [
1340,
400
],
"credentials": {
"slackApi": {
"name": "<your credential>"
}
}
}
],
"connections": {
"Every 5 Minutes": {
"main": [
[
{
"node": "Check Prometheus",
"type": "main",
"index": 0
},
{
"node": "Check Redis",
"type": "main",
"index": 0
},
{
"node": "Check PostgreSQL",
"type": "main",
"index": 0
},
{
"node": "Check MongoDB",
"type": "main",
"index": 0
}
]
]
},
"Check Prometheus": {
"main": [
[
{
"node": "Aggregate Results",
"type": "main",
"index": 0
}
]
]
},
"Check Redis": {
"main": [
[
{
"node": "Aggregate Results",
"type": "main",
"index": 0
}
]
]
},
"Check PostgreSQL": {
"main": [
[
{
"node": "Aggregate Results",
"type": "main",
"index": 0
}
]
]
},
"Check MongoDB": {
"main": [
[
{
"node": "Aggregate Results",
"type": "main",
"index": 0
}
]
]
},
"Aggregate Results": {
"main": [
[
{
"node": "Save Health Data",
"type": "main",
"index": 0
}
]
]
},
"Save Health Data": {
"main": [
[
{
"node": "Check Overall Health",
"type": "main",
"index": 0
}
]
]
},
"Check Overall Health": {
"main": [
[
{
"node": "Success Notification",
"type": "main",
"index": 0
}
],
[
{
"node": "Warning Notification",
"type": "main",
"index": 0
}
]
]
}
},
"active": true,
"settings": {
"executionOrder": "v1"
},
"staticData": null,
"tags": [
{
"createdAt": "2024-01-01T00:00:00.000Z",
"updatedAt": "2024-01-01T00:00:00.000Z",
"id": "monitoring",
"name": "monitoring"
}
],
"triggerCount": 1,
"updatedAt": "2024-01-01T00:00:00.000Z",
"versionId": "1"
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
postgresslackApi
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About this workflow
System Health Check. Uses httpRequest, postgres, slack. Scheduled trigger; 10 nodes.
Source: https://github.com/kyletaylored/n8n-docker-demo/blob/84bda45802ceaf2a5ac14b7d45606f1d78cb750b/examples/n8n-demo/workflows/02-system-health-check.json — original creator credit. Request a take-down →
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