Advisor: Document how to alert based on checks (#108176)

docs/sources/administration/grafana-advisor/_index.md

@@ -106,3 +106,100 @@ To resolve issues flagged by Grafana Advisor and maintain system reliability, fo
 - **Immediate Action:** Address "Action needed" items promptly to ensure system reliability
 - **Systematic Review:** After fixing flagged issues, use the "Refresh" button to confirm all checks pass
 - **Proactive Updates:** Address plugin update recommendations under "Investigation needed" even if they haven't caused failures yet
+
+## How to create an alert based on Advisor results
+
+This guide walks you through creating a Grafana alert that monitors Advisor check results and triggers when failures are detected.
+
+### Step 1: Create a service account and token
+
+1. Navigate to **Administration → Users and access → Service accounts** in your Grafana instance
+2. Click **Add service account**
+3. Provide a name (for example, "advisor-alert-service-account")
+4. Set the role to **Admin** to ensure proper permissions
+5. Click **Create**
+6. In the service account details, click **Add service account token**
+7. Provide a token name and set an appropriate expiration date
+8. Click **Generate token**
+
+> **Important**: Copy the token value immediately and store it securely - you won't be able to see it again
+
+### Step 2: Set up the Grafana Infinity data source
+
+> **Important**: Use Infinity plugin >=v3.3.0 for the JQ parser used later.
+
+1. Go to **Connections → Add new connection**
+2. Search for "Infinity"
+3. If not installed, click **Install**. Wait for the plugin to be installed.
+4. From the plugin page, click **Add new data source**.
+5. Configure the data source:
+   - **Name**: Give it a descriptive name (e.g., "Advisor API")
+   - **Setup Authentication**: In the **Auth type**, select **Bearer Token**. In the **Auth details** section, paste the service account token from Step 1 and in the **Allowed hosts** section, write your Grafana app URL and click the "Add" button (e.g., `https://your-grafana-host.com`).
+6. Click **Save & test** to verify the connection
+
+### Step 3: Create the alert rule
+
+Now you have everything you need to create an alert based on Advisor results.
+
+1. Navigate to **Alerting → Alert rules**
+2. Click **New alert rule**
+3. Provide a rule name (e.g., "Advisor Failures Alert")
+
+#### Configure the query
+
+1. **Data source**: Select the Infinity data source created in Step 3
+2. Configure the query settings:
+   - **Type**: JSON
+   - **Parser**: JQ
+   - **Source**: URL
+   - **Format**: Table
+   - **Method**: GET
+   - **URL**: Get this from the Advisor interface:
+     - Visit the Advisor in your Grafana instance
+     - Open browser Developer Tools (F12) → Network tab
+     - Look for a request ending with `/checks`
+     - Copy the full URL (format: `https://<your_grafana_host>/apis/advisor.grafana.app/v0alpha1/namespaces/<your_namespace>/checks`)
+
+#### Configure parsing options
+
+**Rows/Root** (paste this JQ expression):
+
+```jq
+.items | map({
+  type: .metadata.labels["advisor.grafana.app/type"],
+  creationTimestamp: .metadata.creationTimestamp,
+  failuresCount: (.status.report.failures | length)
+}) | group_by(.type) | map(sort_by(.creationTimestamp) | last)
+```
+
+This JQ query processes Grafana Advisor check data to get the most recent result for each check type. It transforms each check into a simplified object with type, timestamp, and failure count.
+The result is a clean array showing the current state of each check type (data source, plugin, configuration, etc.) with their failure counts, perfect for alerting when any type has failures > 0.
+
+**Columns** (add these three columns):
+
+- **Selector**: `creationTimestamp`, **Format**: Time
+- **Selector**: `failuresCount`, **Format**: Number
+- **Selector**: `type`, **Format**: String
+
+#### Optional: Filter by check type
+
+If you want to alert only for specific check types:
+
+1. In the **Computed columns, Filter, Group by** section
+2. Add a **Filter**: `type == "license"` (replace "license" with your desired check type)
+
+#### Set alert condition
+
+- **Alert condition**: Select "WHEN Last OF QUERY Is above 0"
+- This will trigger when any check type has failures.
+- Click on "Preview alert rule condition" to see the result of the query.
+
+#### Complete alert configuration
+
+Select your preferred evaluation (e.g. every 24 hours) and notification settings.
+
+### Step 4: Save the alert rule
+
+Click **Save** and check the alert is being triggered.
+
+Your alert is now configured to monitor Advisor results and notify you when failures are detected!