Send deduplicated Kubernetes(EKS/GKE/AKS) error logs from Grafana Loki to Slack

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Important notice

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

1. Workflow Overview

Summary Efficiently monitor Kubernetes environments by sending only unique error logs from Grafana Loki to Slack. Reduces alert fatigue while keeping your team informed about critical log events....

Best for

DevOps automation workflows
intermediate n8n builders looking for reusable templates

Tools used

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

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by John Pranay Kumar Reddy.

Original n8n.io source

1.1 Workflow description

Title: Send deduplicated Kubernetes(EKS/GKE/AKS) error logs from Grafana Loki to Slack
Workflow name: Send deduplicated Kubernetes(EKS/GKE/AKS) error logs from Grafana Loki to Slack

✨ Summary

Efficiently monitor Kubernetes environments by sending only unique error logs from Grafana Loki to Slack. Reduces alert fatigue while keeping your team informed about critical log events.

🧑‍💻 Who’s it for

DevOps or SRE engineers running EKS/GKE/AKS
Anyone using Grafana Loki and Promtail for centralized logging
Teams that want Slack alerts but hate alert spam

🔍 What it does

This n8n workflow queries your Loki logs every 5 minutes, filters only the critical ones (error, timeout, exception, etc.), removes duplicate alerts within the batch, and sends clean alerts to a Slack channel with full metadata (pod, namespace, node, container, log, timestamp).

🧠 How it works

🕒 Schedule Trigger

Every 5 minutes (customizable)

🌐 Loki HTTP Query

Pulls logs from the last 10 minutes Keyword match: error, failed, oom, etc.

🧹 Log Parsing

Extracts log fields (pod, container, etc.) Skips empty/malformed results

🧠 Deduplication

Removes repeated error messages (within query window)

📤 Slack Notification

Sends nicely formatted message to Slack

⚙️ Requirements

Tool Notes

Loki- Exposed internally or externally Slack App- With chat:write OAuth n8n- Cloud or self-hosted

🔧 How to Set It Up

Import the JSON file into n8n

Update:

Loki API URL (e.g., http://loki-gateway.monitoring.svc.cluster.local)
Slack Bearer Token (via credentials)
Target Slack channel (e.g., #k8s-alerts)
(Optional) Change keywords in the query regex
Activate the workflow
Ensure n8n pod/container is having access to your kubernetes cluster/pods/namespaces

🛠 How to Customize

Want more or fewer keywords? Adjust the regex in the Query Loki for Error Logs node.
Need to increase deduplication logic? Enhance the Remove Duplicate Alerts node.
Want 5-log summaries every 5 min? Fork this and add a Batch + Slack group sender.

Grafana Loki logs to Slack Output

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - 📥 Query Loki for Error Logs

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 2 - 🕒 Every 5 Min Trigger

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.2

Block 3 - 🧹 Extract Log Fields

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 4 - 🧠 Remove Duplicate Alerts

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 5 - 📤 Send Alerts to Slack

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 6 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 7 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 8 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 9 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 10 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 11 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Send deduplicated Kubernetes(EKS/GKE/AKS) error logs from Grafana Loki to Slack
Complexity	intermediate
Nodes	11
Categories	DevOps
Author	John Pranay Kumar Reddy
Published	05 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7021/7021.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source DevOps workflows

Frequently asked questions

What does Send deduplicated Kubernetes(EKS/GKE/AKS) error logs from Grafana Loki to Slack do?

Summary Efficiently monitor Kubernetes environments by sending only unique error logs from Grafana Loki to Slack. Reduces alert fatigue while keeping your team informed about critical log events....

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your DevOps use case.

John Pranay Kumar Reddy

4 workflows

Nodes

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

Complexity

intermediate

Published 05 Aug 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/7021/7021.json

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Send deduplicated Kubernetes(EKS/GKE/AKS) error logs from Grafana Loki to Slack

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

✨ Summary

🧑‍💻 Who’s it for

🔍 What it does

🧠 How it works

🕒 Schedule Trigger

🌐 Loki HTTP Query

🧹 Log Parsing

🧠 Deduplication

📤 Slack Notification

⚙️ Requirements

Tool Notes

🔧 How to Set It Up

🛠 How to Customize

Grafana Loki logs to Slack Output

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - 📥 Query Loki for Error Logs

Block 2 - 🕒 Every 5 Min Trigger

Block 3 - 🧹 Extract Log Fields

Block 4 - 🧠 Remove Duplicate Alerts

Block 5 - 📤 Send Alerts to Slack

Block 6 - Sticky Note

Block 7 - Sticky Note1

Block 8 - Sticky Note2

Block 9 - Sticky Note3

Block 10 - Sticky Note4

Block 11 - Sticky Note5

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions