Send real-time Kubernetes(EKS/GKE/AKS) CPU spike alerts from Prometheus to Slack

Name: Send real-time Kubernetes(EKS/GKE/AKS) CPU spike alerts from Prometheus to Slack
Availability: InStock
Author: John Pranay Kumar Reddy

Send real-time Kubernetes(EKS/GKE/AKS) CPU spike alerts from Prometheus to Slack preview

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Important notice

This workflow is provided as-is. Please review and test before using in production.

Overview

🧾 Summary

This workflow monitors Kubernetes pod CPU usage using Prometheus, and sends real-time Slack alerts when CPU consumption crosses a threshold (e.g., 0.8 cores). It groups pods by application name to reduce noise and improve clarity, making it ideal for observability across multi-pod deployments like Argo CD, Loki, Promtail, applications etc.

👥 Who’s it for

Designed for DevOps and SRE teams and platform teams, this workflow is 100% no-code, plug-and-play, and can be easily extended to support memory, disk, or network spikes. It eliminates the need for Alertmanager by routing critical alerts directly into Slack using native n8n nodes.

⚙️ What it does

This n8n workflow polls Prometheus every 5 minutes ⏱️, checks if any pod's CPU usage crosses a defined threshold (e.g., 0.8 cores) 🚨, groups them by app 🧩, and sends structured alerts to a Slack channel 💬.

🛠️ How to set up

🔗 Set your Prometheus URL with required metrics (container_cpu_usage_seconds_total, kube_pod_container_resource_limits)

🔐 Add your Slack bot token with chat:write scope

🧩 Import the workflow, customize:

Threshold (e.g., 0.8 cores)

Slack channel

Cron schedule

📋 Requirements

A working Prometheus stack with kube-state-metrics
Slack bot credentials
n8n instance (self-hosted or cloud)

🧑‍💻 How to customize

🧠 Adjust threshold values or query interval

📈 Add memory/disk/network usage metrics

💡 This is a plug-and-play Kubernetes alerting template for real-time observability.

🏷️ Tags:

Prometheus, Slack, Kubernetes, Alert, n8n, DevOps, Observability, CPU Spike, Monitoring

Prometheus Spike Alert to Slack

John Pranay Kumar Reddy

4 workflows

Nodes

n8n-nodes-base.scheduletrigger n8n-nodes-base.httprequest n8n-nodes-base.code n8n-nodes-base.if n8n-nodes-base.stickynote

Complexity

advanced

Published 08 Aug 2025

Likes 0

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Install path: /data/workflows/7145/7145.json

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Send real-time Kubernetes(EKS/GKE/AKS) CPU spike alerts from Prometheus to Slack

Workflow preview

Important notice

Overview

🧾 Summary

👥 Who’s it for

⚙️ What it does

🛠️ How to set up

📋 Requirements

🧑‍💻 How to customize

🏷️ Tags:

Prometheus Spike Alert to Slack