URL Monitoring Application

A Go-based application that monitors multiple URLs and tracks their uptime status. The application provides a web interface to view the status of monitored URLs and sends email notifications when status changes occur.

Features

• Real-time URL monitoring
• Web interface for status visualization
• Email notifications for status changes
• Tenant-based URL organization
• Historical uptime tracking
• SQL Server database integration for storing timeout records

Prerequisites

• Go 1.x
• Microsoft SQL Server
• SMTP server access for email notifications

Configuration

1. Database Configuration

Create a config.json file with the following structure:

{
  "database": {
    "connectionString": "sqlserver://username:password@server/instance?database=TenantsDB",
    "timeoutInterval": "15s"
  }
}

2. URL Configuration

Create a list.json file with the following structure:

{
  "items": [
    {
      "metadata": {
        "name": "tenant-name",
        "creationTimestamp": "timestamp"
      },
      "network": {
        "externalUrls": [
          "http://example.com/"
        ]
      }
    }
  ]
}

Running the Application

1. Ensure all configuration files are properly set up
2. Run the application:

   go run main.go

3. Access the web interface at http://localhost:80

Web Interface

• Home page (/): Displays status of all monitored URLs
• Tenant page (/{tenantname}): Shows detailed history for a specific tenant

Features

• Color-coded status indicators (green for OK, red for issues)
• Real-time status monitoring
• Consolidated email alerts with status summaries
• Historical timeout tracking
• Clickable tenant links in email notifications

Notes

• The application monitors URLs by appending "api/FrontEnd/Shell/StaticData" to each external URL
• Email notifications include counts of OK and Not OK statuses
• The web interface automatically refreshes to show current status