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🚀 Grafana Alerting Setup with SMTP (Google) 📩

1️⃣ Configure SMTP for Email Notifications 📧​

To enable email alerts in Grafana, we need to configure SMTP settings using Gmail.

🔹 Step 1: Generate App Password​

  1. Go to Google App Passwords.
  2. Create a new app password with the name: Grafana SMTP.
  3. Copy the generated password (Example: tnlh tvbp chmh bfcl).

🔹 Step 2: Update Grafana Configuration​

Edit the Grafana configuration file:

sudo vi /etc/grafana/grafana.ini

Modify the SMTP section:

[smtp]
enabled = true
host = smtp.gmail.com:587
user = [email protected]
password = tnlh tvbp chmh bfcl
from_address = [email protected]
from_name = Grafana Alerts
skip_verify = false

Save and restart Grafana:

sudo systemctl restart grafana-server

2️⃣ Create Contact Points 📨​

  1. Navigate to Menu → Contact Points.
  2. Click Create New Contact Point.
  3. Add Gmail addresses (comma-separated): 
    [email protected],
    [email protected],
    [email protected]
  4. Save the contact points.

3️⃣ Set Up Alert Rules 🚨​

🔥 CPU Usage Alert 🚀​

Expression:​

100 - (avg by (instance) (rate(node_cpu_seconds_total{instance="Prod: Portfolio", mode="idle"}[1m])) * 100)

Threshold:​

  • IS ABOVE: 60%

Folder:​

📂 Portfolio

Evaluation Behavior:​

  • Name: EC2_CPU_Usage_Evaluation
  • Evaluation Interval: 5 min
  • Pending Period: 1 min

Notification Message:​

📌 Summary: High CPU usage on Prod: Portfolio

📝 Description: CPU usage is above 60% for more than 1 minute.

💾 Disk Usage Alert ⚠️​

Expression:​

100 * (1 - (node_filesystem_avail_bytes{instance="Prod: Portfolio", mountpoint="/"} / node_filesystem_size_bytes{instance="Prod: Portfolio", mountpoint="/"}))

Threshold:​

  • IS ABOVE: 70%

Folder:​

📂 Portfolio

Evaluation Behavior:​

  • Name: EC2_Disk_Usage_Evaluation
  • Evaluation Interval: 1 min
  • Pending Period: 1 min

Notification Message:​

📌 Summary: High disk usage on Prod: Portfolio

📝 Description: Disk usage is above 70% on Portfolio EC2.

🧠 Memory Usage Alert ⚡​

Expression:​

(avg by (instance) ((node_memory_MemTotal_bytes - node_memory_MemAvailable_bytes{instance="Prod: Portfolio"}) / node_memory_MemTotal_bytes) * 100)

Threshold:​

  • IS ABOVE: 60%

Folder:​

📂 Portfolio

Evaluation Behavior:​

  • Name: EC2_Memory_Usage_Evaluation
  • Evaluation Interval: 1 min

Notification Message:​

📌 Summary: High memory usage on Prod: Portfolio

📝 Description: Memory usage is above 60%.

🎉 Now your Grafana alerts are set up and ready to notify you in case of high CPU, Disk, or Memory usage! 🚀