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Managed Nginx Caching Service
The Nginx Caching Service is designed to optimize web traffic and enhance web application performance. This service combines custom-built Nginx instances with HAproxy for efficient caching and load balancing.
Deployment infromation
The Nginx instances include the following modules and features:
- VTS module for statistics
- Integration with ip2location
- Integration with ip2proxy
- Support for 51Degrees
- Cache purge functionality
HAproxy plays a vital role in this setup by directing incoming traffic to specific Nginx instances based on a consistent hash calculated from the URL. Each Nginx instance includes a Persistent Volume Claim (PVC) for storing cached content, ensuring fast and reliable access to frequently used resources.
Deployment Details
The deployment architecture is illustrated in the diagram below:
┌─────────┐
│ metallb │ arp announce
└────┬────┘
│
│
┌───────▼───────────────────────────┐
│ kubernetes service │ node
│ (externalTrafficPolicy: Local) │ level
└──────────┬────────────────────────┘
│
│
┌────▼────┐ ┌─────────┐
│ haproxy │ │ haproxy │ loadbalancer
│ (active)│ │ (backup)│ layer
└────┬────┘ └─────────┘
│
│ balance uri whole
│ hash-type consistent
┌──────┴──────┬──────────────┐
┌───▼───┐ ┌───▼───┐ ┌───▼───┐ caching
│ nginx │ │ nginx │ │ nginx │ layer
└───┬───┘ └───┬───┘ └───┬───┘
│ │ │
┌────┴───────┬─────┴────┬─────────┴──┐
│ │ │ │
┌───▼────┐ ┌────▼───┐ ┌───▼────┐ ┌────▼───┐
│ origin │ │ origin │ │ origin │ │ origin │
└────────┘ └────────┘ └────────┘ └────────┘
Known issues
VTS module shows wrong upstream resonse time