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": "W02 \u2014 OOMKilled Auto-Recovery",
"nodes": [
{
"parameters": {
"httpMethod": "POST",
"path": "alertmanager",
"options": {}
},
"id": "webhook-trigger",
"name": "AlertManager Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
240,
300
]
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true
},
"conditions": [
{
"leftValue": "={{ $json.body.alerts?.[0]?.labels?.alertname }}",
"rightValue": "PodOOMKilled",
"operator": {
"type": "string",
"operation": "equals"
}
}
]
}
},
"id": "filter-oom",
"name": "Filter \u2014 PodOOMKilled only",
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
460,
300
]
},
{
"parameters": {
"jsCode": "const alert = $input.first().json.body.alerts[0];\nconst pod = alert.labels.pod;\nconst namespace = alert.labels.namespace;\nconst container = alert.labels.container;\n\n// Check static data store for prior OOM in last hour\nconst key = `oom_${namespace}_${pod}`;\nconst stored = $getWorkflowStaticData('node');\nconst now = Date.now();\nconst last = stored[key] || 0;\nconst isRepeat = (now - last) < 3600000; // 1 hour\n\n// Record this occurrence\nstored[key] = now;\n\nreturn [{ json: { pod, namespace, container, isRepeat, firedAt: new Date().toISOString() } }];"
},
"id": "check-repeat",
"name": "Check Repeat OOM",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
680,
300
]
},
{
"parameters": {
"conditions": {
"options": {},
"conditions": [
{
"leftValue": "={{ $json.isRepeat }}",
"rightValue": false,
"operator": {
"type": "boolean",
"operation": "equals"
}
}
]
}
},
"id": "is-repeat",
"name": "First Occurrence?",
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
900,
300
]
},
{
"parameters": {
"resource": "command",
"command": "=kubectl delete pod {{ $('Check Repeat OOM').first().json.pod }} -n {{ $('Check Repeat OOM').first().json.namespace }} 2>&1",
"host": "10.0.10.10",
"port": 22,
"username": "kagiso",
"options": {
"execTimeout": 15000
}
},
"id": "delete-pod",
"name": "SSH \u2014 Delete OOMKilled Pod",
"type": "n8n-nodes-base.ssh",
"typeVersion": 1,
"position": [
1120,
160
],
"credentials": {
"sshPrivateKey": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"amount": 60,
"unit": "seconds"
},
"id": "wait-60",
"name": "Wait 60s",
"type": "n8n-nodes-base.wait",
"typeVersion": 1.1,
"position": [
1340,
160
]
},
{
"parameters": {
"resource": "command",
"command": "=kubectl get pods -n {{ $('Check Repeat OOM').first().json.namespace }} --field-selector=status.phase=Running 2>&1 | grep -i {{ $('Check Repeat OOM').first().json.pod.replace(/-[a-z0-9]+-[a-z0-9]+$/, '') }} || echo 'NOT_RUNNING'",
"host": "10.0.10.10",
"port": 22,
"username": "kagiso",
"options": {
"execTimeout": 15000
}
},
"id": "check-running",
"name": "SSH \u2014 Verify Pod Running",
"type": "n8n-nodes-base.ssh",
"typeVersion": 1,
"position": [
1560,
160
],
"credentials": {
"sshPrivateKey": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"url": "={{ $vars.DISCORD_ALERTS_WEBHOOK }}",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"sendBody": true,
"bodyParameters": {
"parameters": [
{
"name": "body",
"value": "={{ (() => { const running = !$('SSH \u2014 Verify Pod Running').first().json.stdout.includes('NOT_RUNNING'); const pod = $('Check Repeat OOM').first().json.pod; const ns = $('Check Repeat OOM').first().json.namespace; const container = $('Check Repeat OOM').first().json.container; return JSON.stringify({ embeds: [{ title: running ? '\u2705 OOMKill Recovered' : '\u274c OOMKill Recovery Failed', color: running ? 3066993 : 15158332, fields: [ { name: 'Pod', value: `${ns}/${pod}`, inline: true }, { name: 'Container', value: container, inline: true }, { name: 'Action', value: 'Pod deleted \u2014 k8s rescheduled automatically', inline: false }, { name: 'Status', value: running ? 'Pod is Running \u2705' : 'Pod not yet Running \u2014 check manually', inline: false } ], footer: { text: 'n8n auto-recovery' }, timestamp: new Date().toISOString() }] }); })() }}"
}
]
}
},
"id": "discord-recovered",
"name": "Discord \u2014 Recovery Result",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1780,
160
]
},
{
"parameters": {
"url": "={{ $vars.DISCORD_CRITICAL_WEBHOOK }}",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"sendBody": true,
"bodyParameters": {
"parameters": [
{
"name": "body",
"value": "={{ JSON.stringify({ embeds: [{ title: '\ud83d\udd34 Repeated OOMKill \u2014 Manual Action Required', color: 15158332, fields: [ { name: 'Pod', value: `${$('Check Repeat OOM').first().json.namespace}/${$('Check Repeat OOM').first().json.pod}`, inline: true }, { name: 'Container', value: $('Check Repeat OOM').first().json.container, inline: true }, { name: 'Action', value: 'NOT auto-restarting \u2014 second OOMKill in 1 hour', inline: false }, { name: 'Recommended Fix', value: 'Increase memory limit in HelmRelease values and open a PR', inline: false } ], footer: { text: 'n8n OOM guard' }, timestamp: new Date().toISOString() }] }) }}"
}
]
}
},
"id": "discord-repeat",
"name": "Discord \u2014 Repeated OOM Alert",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1120,
440
]
}
],
"connections": {
"AlertManager Webhook": {
"main": [
[
{
"node": "Filter \u2014 PodOOMKilled only",
"type": "main",
"index": 0
}
]
]
},
"Filter \u2014 PodOOMKilled only": {
"main": [
[
{
"node": "Check Repeat OOM",
"type": "main",
"index": 0
}
],
[]
]
},
"Check Repeat OOM": {
"main": [
[
{
"node": "First Occurrence?",
"type": "main",
"index": 0
}
]
]
},
"First Occurrence?": {
"main": [
[
{
"node": "SSH \u2014 Delete OOMKilled Pod",
"type": "main",
"index": 0
}
],
[
{
"node": "Discord \u2014 Repeated OOM Alert",
"type": "main",
"index": 0
}
]
]
},
"SSH \u2014 Delete OOMKilled Pod": {
"main": [
[
{
"node": "Wait 60s",
"type": "main",
"index": 0
}
]
]
},
"Wait 60s": {
"main": [
[
{
"node": "SSH \u2014 Verify Pod Running",
"type": "main",
"index": 0
}
]
]
},
"SSH \u2014 Verify Pod Running": {
"main": [
[
{
"node": "Discord \u2014 Recovery Result",
"type": "main",
"index": 0
}
]
]
}
},
"settings": {
"executionOrder": "v1",
"saveManualExecutions": true,
"timezone": "Africa/Johannesburg"
},
"tags": [
"homelab",
"tier1",
"remediation"
],
"notes": "W02: AlertManager PodOOMKilled \u2192 auto-delete pod (k8s reschedules) \u2192 wait 60s \u2192 verify running \u2192 Discord. Second OOM within 1 hour: skip delete, post to #homelab-critical with recommendation to increase memory limit. Uses workflow static data to track per-pod OOM history across executions."
}
Credentials you'll need
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sshPrivateKey
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About this workflow
W02 — OOMKilled Auto-Recovery. Uses ssh, httpRequest. Webhook trigger; 9 nodes.
Source: https://github.com/Kagiso-me/homelab-infrastructure/blob/6937716832fba603fcd058f52f5b2071205f129f/n8n-workflows/W02-oomkilled-recovery.json — original creator credit. Request a take-down →
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