Overview
The No-Downtime Service is a production-ready Rust application built with Axum that implements industry-standard practices for achieving zero-downtime deployments in Kubernetes environments. It follows the principles outlined in the No-Downtime Blueprint to eliminate single points of failure, reduce blast radius, and enable fast detection and healing.
Key Features
✅ Implemented Features
- Health Checks (
/live,/readyendpoints) - Graceful Shutdown with SIGTERM handling
- Request Timeouts to prevent resource exhaustion
- Concurrency Limits to prevent service overload
- Structured Logging with tracing integration
- Secure Containerization with multi-stage Docker build
- Kubernetes Integration with zero-downtime strategies
- High Availability with pod anti-affinity
🔄 Planned Features
- Circuit Breaker pattern for resilience
- Rate limiting and adaptive throttling
- Distributed tracing with OpenTelemetry
- Authentication and authorization
- Caching with stampede protection
- Metrics collection and health dashboard
Architecture Principles
The service implements the following zero-downtime patterns:
- Health Probes & Self-Healing - Liveness and readiness probes with graceful shutdown
- Deployment Strategies - Rolling updates with zero-downtime configurations
- Resilience Patterns - Timeouts, concurrency limits, and backpressure
- Observability - Structured logging and request tracing
Quick Start
# Build the application
cargo build --release
# Or build the Docker image
docker build -t no-downtime-service .
# Run locally
cargo run
# Deploy to Kubernetes
kubectl apply -f k8s/Documentation
- No-Downtime Principles - Core zero-downtime concepts and patterns
- Feature Implementation Status - Current feature status
- Product Roadmap - Future development plans
- Security Implementation - Security considerations
- Technical Implementation - Detailed technical documentation