Grafana Alerts

Setting up Alerts

Creating a Simple Alert

To create a basic alert in Grafana, you can set up the alert in a panel. Below is an example of setting up a simple alert on a time series panel.

              
              {
  "alert": {
    "name": "CPU Load Alert",
    "conditions": [{
      "type": "query",
      "query": "avg(rate(cpu_load[5m])) > 80",
      "threshold": 80
    }]
  }
}

Setting Alert Evaluation

Alerts in Grafana are evaluated at a specific interval. You can set the evaluation frequency to control how often alerts are triggered. Here is an example of setting an alert evaluation period.

              
              {
  "evaluation_interval": "1m"
}

Configuring Alert Notifications

Setting up Email Notifications

Grafana allows you to configure email notifications for alerts. Here is an example configuration for email alerts:

              
              {
  "email": {
    "enabled": true,
    "addresses": "admin@example.com"
  }
}

Setting up Slack Notifications

You can also configure Slack for alert notifications. Below is an example of a Slack notification configuration.

              
              {
  "slack": {
    "enabled": true,
    "webhook_url": "https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX"
  }
}

Alerting Rules

Creating Alerting Rules

In Grafana, alerting rules define the conditions under which an alert is triggered. Here’s an example rule to trigger an alert based on high CPU load.

              
              groups:
  - name: cpu-alerts
    interval: 1m
    rules:
    - alert: HighCPUUsage
      expr: avg(rate(cpu_load[5m])) > 80
      for: 5m
      labels:
        severity: critical
      annotations:
        summary: "CPU usage is above 80% for the last 5 minutes"

Alerting Rule with Multiple Conditions

You can set multiple conditions for an alerting rule. Below is an example of a rule with multiple conditions.

              
              groups:
  - name: cpu-alerts
    interval: 1m
    rules:
    - alert: HighCPUUsage
      expr: avg(rate(cpu_load[5m])) > 80
      for: 5m
      labels:
        severity: critical
      annotations:
        summary: "CPU usage is above 80% for the last 5 minutes"
    - alert: LowDiskSpace
      expr: avg(disk_space) < 10
      for: 10m
      labels:
        severity: warning
      annotations:
        summary: "Disk space is below 10%"

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Grafana Alerts

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