stack health v1 (#954)

Co-authored-by: jdv <julien@crowdsec.net>

Author: rr404

crowdsec-docs/sidebarsUnversioned.ts

@@ -422,6 +422,11 @@ const sidebarsUnversionedConfig: SidebarConfig = {
 				},
 			],
 		},
+		{
+			type: "doc",
+			label: "🩺 Stack Health",
+			id: "console/stackhealth",
+		},
 	],
 	remediationSideBar: [
 		{

crowdsec-docs/static/img/console/stackhealth/stackhealth-engine-badge.png

@@ -0,0 +1,124 @@
+---
+id: stackhealth
+title: Stack Health
+---
+
+The **Stack Health** Feature is a monitoring tool within the CrowdSec Console helping you keep your infrastructure operational and properly configured.     
+Its primary goal is to identify configuration issues, connectivity problems, or potential misconfigurations that could impact your detection capabilities.
+
+---
+
+## Key Features
+
+- **Issue Detection**: Identifies problems with Security Engines, Log Processors, and blocklists integrations
+- **Severity-Based Prioritization**: Issues are categorized by criticality *(Critical, Important, Recommended, Bonus)*
+- **Contextual Troubleshooting**: Each issue points to a dedicated troubleshooting page with detailed diagnosis steps and resolution guidance
+- **Notification Support**: Get notified about critical issues through the [Console notification system](/u/console/notification_integrations/overview)
+
+---
+
+## Accessing Stack Health
+
+**Stack Health** is available in the CrowdSec Console for all authenticated users.  
+It is manifesting as:
+- A dedicated dashboard accessible from the **Security Stack** space left bar menu.
+- An issue counter badge on the Security Engines cards *(circle in top right corner)*
+- A list of issues in the Security Engine details view.
+
+### Stack Health Dashboard
+
+The dashboard shows:
+- List of all detected issues in your organization grouped by criticality
+- A filter to focus on a specific Security Engine
+- Each issue card displays:
+  - Issue title and description
+  - Affected Security Engine(s)
+  - Buttons to: mark as resolved, ignore or access troubleshooting guide
+
+![Stack Health Overview](/img/console/stackhealth/stackhealth-overview.png)
+
+### Issues in Security Engine view
+
+A badge on the Security Engine card indicates the number of active issues affecting that engine.
+If you click on the Security Engine card to access its details, you will find a dedicated section listing all active issues for that engine.
+
+|SE Card with Badge| SE Details with Issues|
+|------------------|-----------------------|
+|![Issues Badge](/img/console/stackhealth/stackhealth-engine-badge.png)|![Issues in Engine Details](/img/console/stackhealth/stackhealth-engine-details.png)|
+
+
+---
+
+## Understanding Issue Criticality
+
+Stack Health categorizes issues into four severity levels:
+
+| Severity | Description |
+|----------|-------------|
+| **Critical** | Immediate attention required - core functionality is impaired |
+| **Important** | Should be addressed soon - may impact protection effectiveness |
+| **Recommended** | Additional actions to improve your security posture |
+| **Bonus** | Optimization advice and premium feature recommendations |
+
+Focus on resolving Critical and Important issues first to ensure your security stack is functioning properly.
+
+---
+
+## Issue Details and Resolution
+
+Click on any issue to view detailed information and step-by-step troubleshooting guidance.
+
+![Issue Details](/img/console/stackhealth/stackhealth-issue-details.png)
+
+Each issue detail page includes:
+
+- **Trigger Condition**: Why the issue was raised
+- **Criticality Level**: Severity and priority
+- **Impact**: What functionality is affected
+- **Engine Information**: Affected Security Engine details (ID, OS, IP address)
+- **Contextual Troubleshooting**: Specific diagnosis steps for your situation
+
+### Example: Security Engine No Alerts
+
+When a Security Engine hasn't generated alerts in 48 hours, Stack Health provides:
+
+- Possible root causes (simulation mode, missing collections, low traffic)
+- Commands to verify scenario status
+- Steps to check log acquisition and parsing
+- Links to related documentation
+
+![Security Engine No Alerts](/img/console/stackhealth/stackhealth-no-alerts-troubleshooting.png)
+
+### List of Issues
+
+Refer to the [**Console Health Check Issues**](/u/troubleshooting/console_issues) documentation page for a comprehensive **list of all Stack Health issues**, their **trigger** conditions, and links to **troubleshooting** guides.  
+This page is regularly updated as new issues are added.
+
+---
+
+## Notifications and Alerts
+
+Stack Health integrates with the Console notification system to alert you when critical issues occur.
+
+To receive notifications:
+
+1. Navigate to **Notification Settings** in the Console
+2. Configure your preferred notification channels (Email, Slack, Discord, Webhook)
+3. Set up notification rules for Stack Health events
+
+Learn more about [Console Notification Integrations](/u/console/notification_integrations/overview).
+
+---
+
+## Best Practices
+
+### Regular Monitoring
+- Check Stack Health dashboard regularly, especially after infrastructure changes
+- Set up [notifications](/u/console/notification_integrations/overview) for **Critical** and **Important** issues
+- Review the full list of issues at least weekly
+
+### Prioritize by Severity
+1. Address **Critical** issues immediately - they indicate broken functionality
+2. Plan to fix **Important** issues within 24-48 hours
+3. Schedule **Recommended** improvements during maintenance windows
+4. Explore **Bonus** optimizations when optimizing your setup